feat(diff): disallow editing done tasks by default

Problem: Done tasks could be freely edited in the buffer, leading to
accidental modifications of completed work.

Solution: Add a `lock_done` config option (default `true`) and a guard
in `diff.apply()` that rejects field changes to done tasks unless the
user toggles the checkbox back to pending first.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -1,5 +1,6 @@
 doc/tags
 *.log
+minimal_init.lua
 
 .*cache*
 CLAUDE.md

.luarc.json

@@ -2,7 +2,14 @@
   "runtime.version": "LuaJIT",
   "runtime.path": ["lua/?.lua", "lua/?/init.lua"],
   "diagnostics.globals": ["vim", "jit"],
-  "workspace.library": ["$VIMRUNTIME/lua", "${3rd}/luv/library"],
+  "diagnostics.libraryFiles": "Disable",
+  "workspace.library": [
+    "$VIMRUNTIME/lua",
+    "${3rd}/luv/library",
+    "${3rd}/busted/library",
+    "${3rd}/luassert/library"
+  ],
   "workspace.checkThirdParty": false,
+  "workspace.ignoreDir": [".direnv"],
   "completion.callSnippet": "Replace"
 }

README.md

@@ -1,13 +1,35 @@
 # pending.nvim
 
-Edit tasks like text. `:w` saves them.
+**Edit tasks like text.**
 
-<!-- insert preview -->
+Oil-like task management for todos in Neovim, inspired by
+[oil.nvim](https://github.com/stevearc/oil.nvim) and
+[vim-fugitive](https://github.com/tpope/vim-fugitive)
+
+https://github.com/user-attachments/assets/f3898ecb-ec95-43fe-a71f-9c9f49628ba9
+
+## Features
+
+- Oil-style buffer editing: standard Vim motions for all task operations
+- Inline metadata: `due:`, `cat:`, `rec:` tokens parsed on `:w`
+- Rich date input: relative (`+3d`, `tomorrow`), weekdays, ordinals, custom formats, time suffixes
+- Recurring tasks with automatic next-date spawning on completion
+- Category and queue views with foldable sections
+- Multi-level undo (up to 20 saves, persisted across sessions)
+- Text objects (`at`/`it`/`aC`/`iC`) and motions (`]]`/`[[`/`]t`/`[t`)
+- Omnifunc completion for `due:`, `cat:`, and `rec:` tokens
+- Filters: `cat:X`, `overdue`, `today`, `priority`, `wip`, `blocked`
+- Google Calendar one-way push via OAuth PKCE
+- Google Tasks bidirectional sync via OAuth PKCE
+- S3 whole-store sync via AWS CLI with cross-device merge
+- Auto-authentication: sync actions trigger auth flows automatically
+- Forge links: reference GitHub/GitLab/Codeberg issues and PRs inline
 
 ## Requirements
 
 - Neovim 0.10+
-- (Optionally) `curl` and `openssl` for Google Calendar and Google Task sync
+- (Optionally) `curl` for Google Calendar and Google Tasks sync
+- (Optionally) `aws` CLI for S3 sync
 
 ## Installation
 

flake.nix

@@ -13,9 +13,12 @@
       ...
     }:
     let
-      forEachSystem = f: nixpkgs.lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});
+      forEachSystem =
+        f: nixpkgs.lib.genAttrs (import systems) (system: f nixpkgs.legacyPackages.${system});
     in
     {
+      formatter = forEachSystem (pkgs: pkgs.nixfmt-tree);
+
       devShells = forEachSystem (pkgs: {
         default = pkgs.mkShell {
           packages = [

lua/pending/buffer.lua

@@ -1,21 +1,37 @@
 local config = require('pending.config')
-local store = require('pending.store')
+local log = require('pending.log')
 local views = require('pending.views')
 
 ---@class pending.buffer
 local M = {}
 
+---@type pending.Store?
+local _store = nil
+
 ---@type integer?
 local task_bufnr = nil
 ---@type integer?
 local task_winid = nil
-local task_ns = vim.api.nvim_create_namespace('pending')
+local ns_eol = vim.api.nvim_create_namespace('pending_eol')
+local ns_inline = vim.api.nvim_create_namespace('pending_inline')
 ---@type 'category'|'priority'|nil
 local current_view = nil
 ---@type pending.LineMeta[]
 local _meta = {}
 ---@type table<integer, table<string, boolean>>
 local _fold_state = {}
+---@type boolean
+local _initial_fold_loaded = false
+---@type string[]
+local _filter_predicates = {}
+---@type table<integer, true>
+local _hidden_ids = {}
+---@type table<integer, true>
+local _dirty_rows = {}
+---@type boolean
+local _on_bytes_active = false
+---@type boolean
+local _rendering = false
 
 ---@return pending.LineMeta[]
 function M.meta()
@@ -37,12 +53,314 @@ function M.current_view_name()
   return current_view
 end
 
+---@param s pending.Store?
+---@return nil
+function M.set_store(s)
+  _store = s
+end
+
+---@return pending.Store?
+function M.store()
+  return _store
+end
+
+---@return string[]
+function M.filter_predicates()
+  return _filter_predicates
+end
+
+---@return table<integer, true>
+function M.hidden_ids()
+  return _hidden_ids
+end
+
+---@param predicates string[]
+---@param hidden table<integer, true>
+---@return nil
+function M.set_filter(predicates, hidden)
+  _filter_predicates = predicates
+  _hidden_ids = hidden
+end
+
+---@return nil
 function M.clear_winid()
   task_winid = nil
 end
 
+---@param winid integer
+---@return nil
+function M.update_winid(winid)
+  task_winid = winid
+end
+
+---@param b? integer
+---@return nil
+function M.clear_marks(b)
+  local bufnr = b or task_bufnr
+  vim.api.nvim_buf_clear_namespace(bufnr, ns_eol, 0, -1)
+  vim.api.nvim_buf_clear_namespace(bufnr, ns_inline, 0, -1)
+end
+
+---@param b integer
+---@param row integer
+---@return nil
+function M.clear_inline_row(b, row)
+  vim.api.nvim_buf_clear_namespace(b, ns_inline, row - 1, row)
+end
+
+---@return table<integer, true>
+function M.dirty_rows()
+  return _dirty_rows
+end
+
+---@return nil
+function M.clear_dirty_rows()
+  _dirty_rows = {}
+end
+
+---@param bufnr integer
+---@param row integer
+---@param m pending.LineMeta
+---@param icons table
+local function apply_inline_row(bufnr, row, m, icons)
+  if m.type == 'filter' then
+    local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
+    vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, 0, {
+      end_col = #line,
+      hl_group = 'PendingFilter',
+    })
+  elseif m.type == 'task' then
+    if m.status == 'done' then
+      local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
+      local col_start = line:find('/%d+/') and select(2, line:find('/%d+/')) or 0
+      vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, col_start, {
+        end_col = #line,
+        hl_group = 'PendingDone',
+      })
+    elseif m.status == 'blocked' then
+      local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
+      local col_start = line:find('/%d+/') and select(2, line:find('/%d+/')) or 0
+      vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, col_start, {
+        end_col = #line,
+        hl_group = 'PendingBlocked',
+      })
+    end
+    local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
+    local bracket_col = (line:find('%[') or 1) - 1
+    local icon, icon_hl
+    if m.status == 'done' then
+      icon, icon_hl = icons.done, 'PendingDone'
+    elseif m.status == 'wip' then
+      icon, icon_hl = icons.wip or '>', 'PendingWip'
+    elseif m.status == 'blocked' then
+      icon, icon_hl = icons.blocked or '=', 'PendingBlocked'
+    elseif m.priority and m.priority >= 3 then
+      icon, icon_hl = icons.priority, 'PendingPriority3'
+    elseif m.priority and m.priority == 2 then
+      icon, icon_hl = icons.priority, 'PendingPriority2'
+    elseif m.priority and m.priority > 0 then
+      icon, icon_hl = icons.priority, 'PendingPriority'
+    else
+      icon, icon_hl = icons.pending, 'Normal'
+    end
+    vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, bracket_col, {
+      virt_text = { { '[' .. icon .. ']', icon_hl } },
+      virt_text_pos = 'overlay',
+      priority = 100,
+    })
+    if m.forge_spans then
+      local forge = require('pending.forge')
+      for _, span in ipairs(m.forge_spans) do
+        local label_text, hl_group = forge.format_label(span.ref, span.cache)
+        vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, span.col_start, {
+          end_col = span.col_end,
+          conceal = '',
+          virt_text = { { label_text, hl_group } },
+          virt_text_pos = 'inline',
+          priority = 90,
+        })
+      end
+    end
+  elseif m.type == 'header' then
+    local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
+    vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, 0, {
+      end_col = #line,
+      hl_group = 'PendingHeader',
+    })
+    vim.api.nvim_buf_set_extmark(bufnr, ns_inline, row, 0, {
+      virt_text = { { icons.category .. ' ', 'PendingHeader' } },
+      virt_text_pos = 'overlay',
+      priority = 100,
+    })
+  end
+end
+
+---@param line string
+---@return string?
+local function infer_status(line)
+  local ch = line:match('^/%d+/%- %[(.)%]') or line:match('^%- %[(.)%]')
+  if not ch then
+    return nil
+  end
+  if ch == 'x' then
+    return 'done'
+  elseif ch == '>' then
+    return 'wip'
+  elseif ch == '=' then
+    return 'blocked'
+  end
+  return 'pending'
+end
+
+---@param bufnr integer
+---@return nil
+function M.reapply_dirty_inline(bufnr)
+  if not next(_dirty_rows) then
+    return
+  end
+  log.debug(('reapply_dirty: rows=%s'):format(vim.inspect(vim.tbl_keys(_dirty_rows))))
+  local icons = config.get().icons
+  for row in pairs(_dirty_rows) do
+    local m = _meta[row]
+    if m and m.type == 'task' then
+      local line = vim.api.nvim_buf_get_lines(bufnr, row - 1, row, false)[1] or ''
+      local old_status = m.status
+      m.status = infer_status(line) or m.status
+      m.forge_spans = nil
+      log.debug(
+        ('reapply_dirty: row=%d line=%q old_status=%s new_status=%s'):format(
+          row,
+          line,
+          tostring(old_status),
+          tostring(m.status)
+        )
+      )
+    end
+    if m then
+      vim.api.nvim_buf_clear_namespace(bufnr, ns_inline, row - 1, row)
+      apply_inline_row(bufnr, row - 1, m, icons)
+    end
+  end
+  _dirty_rows = {}
+end
+
+---@param bufnr integer
+---@return nil
+function M.attach_bytes(bufnr)
+  if _on_bytes_active then
+    return
+  end
+  _on_bytes_active = true
+  vim.api.nvim_buf_attach(bufnr, false, {
+    on_bytes = function(_, buf, _, start_row, start_col, _, old_end_row, _, _, new_end_row, _, _)
+      if buf ~= task_bufnr then
+        _on_bytes_active = false
+        return true
+      end
+      if _rendering then
+        return
+      end
+      local delta = new_end_row - old_end_row
+      log.debug(
+        ('on_bytes: start_row=%d start_col=%d old_end=%d new_end=%d delta=%d'):format(
+          start_row,
+          start_col,
+          old_end_row,
+          new_end_row,
+          delta
+        )
+      )
+      if delta > 0 then
+        for _ = 1, delta do
+          log.debug(('on_bytes: insert meta at %d'):format(start_row + 2))
+          table.insert(_meta, start_row + 2, { type = 'task' })
+        end
+      elseif delta < 0 then
+        for _ = 1, -delta do
+          if _meta[start_row + 2] then
+            log.debug(('on_bytes: remove meta at %d'):format(start_row + 2))
+            table.remove(_meta, start_row + 2)
+          end
+        end
+      end
+      for r = start_row + 1, start_row + 1 + math.max(0, new_end_row) do
+        _dirty_rows[r] = true
+      end
+      log.debug(('on_bytes: dirty rows=%s'):format(vim.inspect(vim.tbl_keys(_dirty_rows))))
+      for i, m in ipairs(_meta) do
+        log.debug(('on_bytes: _meta[%d] type=%s status=%s'):format(i, m.type, tostring(m.status)))
+      end
+    end,
+  })
+end
+
+---@return nil
+function M.persist_folds()
+  log.debug(
+    ('persist_folds: view=%s store=%s'):format(tostring(current_view), tostring(_store ~= nil))
+  )
+  if current_view ~= 'category' or not _store then
+    log.debug('persist_folds: early return (view or store)')
+    return
+  end
+  local bufnr = task_bufnr
+  if not bufnr or not vim.api.nvim_buf_is_valid(bufnr) then
+    log.debug('persist_folds: early return (no valid bufnr)')
+    return
+  end
+  local folded = {}
+  local seen = {}
+  local wins = vim.fn.win_findbuf(bufnr)
+  log.debug(
+    ('persist_folds: checking %d windows for bufnr=%d, meta has %d entries'):format(
+      #wins,
+      bufnr,
+      #_meta
+    )
+  )
+  for _, winid in ipairs(wins) do
+    if vim.api.nvim_win_is_valid(winid) then
+      vim.api.nvim_win_call(winid, function()
+        for lnum, m in ipairs(_meta) do
+          if m.type == 'header' and m.category and not seen[m.category] then
+            local closed = vim.fn.foldclosed(lnum)
+            log.debug(
+              ('persist_folds: win=%d lnum=%d cat=%s foldclosed=%d'):format(
+                winid,
+                lnum,
+                m.category,
+                closed
+              )
+            )
+            if closed ~= -1 then
+              seen[m.category] = true
+              table.insert(folded, m.category)
+            end
+          end
+        end
+      end)
+    end
+  end
+  log.debug(
+    ('persist_folds: saving %d folded categories: %s'):format(#folded, table.concat(folded, ', '))
+  )
+  _store:set_folded_categories(folded)
+end
+
+---@return nil
 function M.close()
-  if task_winid and vim.api.nvim_win_is_valid(task_winid) then
+  if not task_winid or not vim.api.nvim_win_is_valid(task_winid) then
+    task_winid = nil
+    return
+  end
+  M.persist_folds()
+  if _store then
+    _store:save()
+  end
+  local wins = vim.api.nvim_list_wins()
+  if #wins == 1 then
+    vim.cmd.enew()
+  else
     vim.api.nvim_win_close(task_winid, false)
   end
   task_winid = nil
@@ -55,19 +373,13 @@ local function set_buf_options(bufnr)
   vim.bo[bufnr].swapfile = false
   vim.bo[bufnr].filetype = 'pending'
   vim.bo[bufnr].modifiable = true
+  vim.bo[bufnr].omnifunc = 'v:lua.require("pending.complete").omnifunc'
 end
 
 ---@param winid integer
 local function set_win_options(winid)
   vim.wo[winid].conceallevel = 3
-  vim.wo[winid].concealcursor = 'nvic'
+  vim.wo[winid].concealcursor = 'nic'
-  vim.wo[winid].wrap = false
-  vim.wo[winid].number = false
-  vim.wo[winid].relativenumber = false
-  vim.wo[winid].signcolumn = 'no'
-  vim.wo[winid].foldcolumn = '0'
-  vim.wo[winid].spell = false
-  vim.wo[winid].cursorline = true
   vim.wo[winid].winfixheight = true
 end
 
@@ -77,7 +389,7 @@ local function setup_syntax(bufnr)
     vim.cmd([[
       syntax clear
       syntax match taskId /^\/\d\+\// conceal
-      syntax match taskHeader /^## .*$/ contains=taskId
+      syntax match taskHeader /^# .*$/ contains=taskId
       syntax match taskCheckbox /\[!\]/ contained containedin=taskLine
       syntax match taskLine /^\/\d\+\/- \[.\] .*$/ contains=taskId,taskCheckbox
     ]])
@@ -85,6 +397,7 @@ local function setup_syntax(bufnr)
 end
 
 ---@param above boolean
+---@return nil
 function M.open_line(above)
   local bufnr = task_bufnr
   if not bufnr or not vim.api.nvim_buf_is_valid(bufnr) then
@@ -92,8 +405,25 @@ function M.open_line(above)
   end
   local row = vim.api.nvim_win_get_cursor(0)[1]
   local insert_row = above and (row - 1) or row
+  local meta_pos = insert_row + 1
+
+  _rendering = true
   vim.bo[bufnr].modifiable = true
   vim.api.nvim_buf_set_lines(bufnr, insert_row, insert_row, false, { '- [ ] ' })
+  _rendering = false
+
+  table.insert(_meta, meta_pos, { type = 'task' })
+
+  local icons = config.get().icons
+  local total = vim.api.nvim_buf_line_count(bufnr)
+  for r = meta_pos, math.min(meta_pos + 1, total) do
+    vim.api.nvim_buf_clear_namespace(bufnr, ns_inline, r - 1, r)
+    local m = _meta[r]
+    if m then
+      apply_inline_row(bufnr, r - 1, m, icons)
+    end
+  end
+
   vim.api.nvim_win_set_cursor(0, { insert_row + 1, 6 })
   vim.cmd('startinsert!')
 end
@@ -114,50 +444,107 @@ function M.get_fold()
   end
 end
 
+---@class pending.EolSegment
+---@field type 'specifier'|'literal'
+---@field key? 'c'|'r'|'d'
+---@field text? string
+
+---@param fmt string
+---@return pending.EolSegment[]
+local function parse_eol_format(fmt)
+  local segments = {}
+  local pos = 1
+  local len = #fmt
+  while pos <= len do
+    if fmt:sub(pos, pos) == '%' and pos + 1 <= len then
+      local key = fmt:sub(pos + 1, pos + 1)
+      if key == 'c' or key == 'r' or key == 'd' then
+        table.insert(segments, { type = 'specifier', key = key })
+        pos = pos + 2
+      else
+        table.insert(segments, { type = 'literal', text = '%' .. key })
+        pos = pos + 2
+      end
+    else
+      local next_pct = fmt:find('%%', pos + 1)
+      local chunk = next_pct and fmt:sub(pos, next_pct - 1) or fmt:sub(pos)
+      table.insert(segments, { type = 'literal', text = chunk })
+      pos = pos + #chunk
+    end
+  end
+  return segments
+end
+
+---@param segments pending.EolSegment[]
+---@param m pending.LineMeta
+---@param icons pending.Icons
+---@return string[][]
+local function build_eol_virt(segments, m, icons)
+  local due_hl = m.overdue and 'PendingOverdue' or 'PendingDue'
+  local resolved = {}
+  for i, seg in ipairs(segments) do
+    if seg.type == 'specifier' then
+      local text, hl
+      if seg.key == 'c' and m.show_category and m.category then
+        text = icons.category .. ' ' .. m.category
+        hl = 'PendingHeader'
+      elseif seg.key == 'r' and m.recur then
+        text = icons.recur .. ' ' .. m.recur
+        hl = 'PendingRecur'
+      elseif seg.key == 'd' and m.due then
+        text = icons.due .. ' ' .. m.due
+        hl = due_hl
+      end
+      resolved[i] = text and { text = text, hl = hl, present = true } or { present = false }
+    else
+      resolved[i] = { text = seg.text, hl = 'Normal', literal = true }
+    end
+  end
+
+  local virt_parts = {}
+  local pending_sep = nil
+  for _, r in ipairs(resolved) do
+    if r.literal then
+      if #virt_parts > 0 and not pending_sep then
+        pending_sep = { r.text, r.hl }
+      end
+    elseif r.present then
+      if pending_sep then
+        table.insert(virt_parts, pending_sep)
+        pending_sep = nil
+      end
+      table.insert(virt_parts, { r.text, r.hl })
+    else
+      pending_sep = nil
+    end
+  end
+  return virt_parts
+end
+
 ---@param bufnr integer
 ---@param line_meta pending.LineMeta[]
 local function apply_extmarks(bufnr, line_meta)
-  vim.api.nvim_buf_clear_namespace(bufnr, task_ns, 0, -1)
+  local cfg = config.get()
+  local icons = cfg.icons
+  local eol_segments = parse_eol_format(cfg.view.eol_format or '%c  %r  %d')
+  vim.api.nvim_buf_clear_namespace(bufnr, ns_eol, 0, -1)
+  vim.api.nvim_buf_clear_namespace(bufnr, ns_inline, 0, -1)
+  log.debug(('apply_extmarks: full render, %d lines'):format(#line_meta))
   for i, m in ipairs(line_meta) do
+    log.debug(
+      ('apply_extmarks: row=%d type=%s status=%s'):format(i - 1, m.type, tostring(m.status))
+    )
     local row = i - 1
     if m.type == 'task' then
-      local due_hl = m.overdue and 'PendingOverdue' or 'PendingDue'
+      local virt_parts = build_eol_virt(eol_segments, m, icons)
-      if m.show_category then
+      if #virt_parts > 0 then
-        local virt_text
+        vim.api.nvim_buf_set_extmark(bufnr, ns_eol, row, 0, {
-        if m.category and m.due then
+          virt_text = virt_parts,
-          virt_text = { { m.category .. '  ', 'PendingHeader' }, { m.due, due_hl } }
-        elseif m.category then
-          virt_text = { { m.category, 'PendingHeader' } }
-        elseif m.due then
-          virt_text = { { m.due, due_hl } }
-        end
-        if virt_text then
-          vim.api.nvim_buf_set_extmark(bufnr, task_ns, row, 0, {
-            virt_text = virt_text,
-            virt_text_pos = 'eol',
-          })
-        end
-      elseif m.due then
-        vim.api.nvim_buf_set_extmark(bufnr, task_ns, row, 0, {
-          virt_text = { { m.due, due_hl } },
           virt_text_pos = 'eol',
         })
       end
-      if m.status == 'done' then
-        local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
-        local col_start = line:find('/%d+/') and select(2, line:find('/%d+/')) or 0
-        vim.api.nvim_buf_set_extmark(bufnr, task_ns, row, col_start, {
-          end_col = #line,
-          hl_group = 'PendingDone',
-        })
-      end
-    elseif m.type == 'header' then
-      local line = vim.api.nvim_buf_get_lines(bufnr, row, row + 1, false)[1] or ''
-      vim.api.nvim_buf_set_extmark(bufnr, task_ns, row, 0, {
-        end_col = #line,
-        hl_group = 'PendingHeader',
-      })
     end
+    apply_inline_row(bufnr, row, m, icons)
   end
 end
 
@@ -167,60 +554,136 @@ local function setup_highlights()
   vim.api.nvim_set_hl(0, 'PendingOverdue', { link = 'DiagnosticError', default = true })
   vim.api.nvim_set_hl(0, 'PendingDone', { link = 'Comment', default = true })
   vim.api.nvim_set_hl(0, 'PendingPriority', { link = 'DiagnosticWarn', default = true })
+  vim.api.nvim_set_hl(0, 'PendingPriority2', { link = 'DiagnosticError', default = true })
+  vim.api.nvim_set_hl(0, 'PendingPriority3', { link = 'DiagnosticError', default = true })
+  vim.api.nvim_set_hl(0, 'PendingWip', { link = 'DiagnosticInfo', default = true })
+  vim.api.nvim_set_hl(0, 'PendingBlocked', { link = 'DiagnosticError', default = true })
+  vim.api.nvim_set_hl(0, 'PendingRecur', { link = 'DiagnosticInfo', default = true })
+  vim.api.nvim_set_hl(0, 'PendingFilter', { link = 'DiagnosticWarn', default = true })
+  vim.api.nvim_set_hl(0, 'PendingForge', { link = 'DiagnosticInfo', default = true })
+  vim.api.nvim_set_hl(0, 'PendingForgeClosed', { link = 'Comment', default = true })
+end
+
+---@return string
+function M.get_foldtext()
+  local folding = config.resolve_folding()
+  if not folding.foldtext then
+    return vim.fn.foldtext()
+  end
+  local line = vim.fn.getline(vim.v.foldstart)
+  local cat = line:match('^#%s+(.+)$') or line
+  local task_count = vim.v.foldend - vim.v.foldstart
+  local icons = config.get().icons
+  local result = folding.foldtext
+    :gsub('%%c', cat)
+    :gsub('%%n', tostring(task_count))
+    :gsub('(%d+) (%w+)s%)', function(n, word)
+      if n == '1' then
+        return n .. ' ' .. word .. ')'
+      end
+      return n .. ' ' .. word .. 's)'
+    end)
+  return icons.category .. ' ' .. result
 end
 
 local function snapshot_folds(bufnr)
-  if current_view ~= 'category' then
+  if current_view ~= 'category' or not config.resolve_folding().enabled then
     return
   end
   for _, winid in ipairs(vim.fn.win_findbuf(bufnr)) do
-    local state = {}
+    if _fold_state[winid] == nil and _initial_fold_loaded then
-    vim.api.nvim_win_call(winid, function()
+      local state = {}
-      for lnum, m in ipairs(_meta) do
+      vim.api.nvim_win_call(winid, function()
-        if m.type == 'header' and m.category then
+        for lnum, m in ipairs(_meta) do
-          if vim.fn.foldclosed(lnum) ~= -1 then
+          if m.type == 'header' and m.category then
-            state[m.category] = true
+            if vim.fn.foldclosed(lnum) ~= -1 then
+              state[m.category] = true
+            end
           end
         end
-      end
+      end)
-    end)
+      _fold_state[winid] = state
-    _fold_state[winid] = state
+    end
   end
 end
 
 local function restore_folds(bufnr)
-  if current_view ~= 'category' then
+  log.debug(
+    ('restore_folds: view=%s folding_enabled=%s'):format(
+      tostring(current_view),
+      tostring(config.resolve_folding().enabled)
+    )
+  )
+  if current_view ~= 'category' or not config.resolve_folding().enabled then
     return
   end
   for _, winid in ipairs(vim.fn.win_findbuf(bufnr)) do
     local state = _fold_state[winid]
+    _fold_state[winid] = nil
+    log.debug(
+      ('restore_folds: win=%d has_fold_state=%s initial_loaded=%s has_store=%s'):format(
+        winid,
+        tostring(state ~= nil),
+        tostring(_initial_fold_loaded),
+        tostring(_store ~= nil)
+      )
+    )
+    if not state and not _initial_fold_loaded and _store then
+      _initial_fold_loaded = true
+      local cats = _store:get_folded_categories()
+      log.debug(
+        ('restore_folds: loaded %d categories from store: %s'):format(
+          #cats,
+          table.concat(cats, ', ')
+        )
+      )
+      if #cats > 0 then
+        state = {}
+        for _, cat in ipairs(cats) do
+          state[cat] = true
+        end
+      end
+    end
     if state and next(state) ~= nil then
+      local applying = {}
+      for k in pairs(state) do
+        table.insert(applying, k)
+      end
+      log.debug(('restore_folds: applying folds for: %s'):format(table.concat(applying, ', ')))
       vim.api.nvim_win_call(winid, function()
         vim.cmd('normal! zx')
         local saved = vim.api.nvim_win_get_cursor(0)
         for lnum, m in ipairs(_meta) do
           if m.type == 'header' and m.category and state[m.category] then
+            log.debug(('restore_folds: folding lnum=%d cat=%s'):format(lnum, m.category))
             vim.api.nvim_win_set_cursor(0, { lnum, 0 })
             vim.cmd('normal! zc')
           end
         end
         vim.api.nvim_win_set_cursor(0, saved)
       end)
-      _fold_state[winid] = nil
     end
   end
 end
 
 ---@param bufnr? integer
+---@return nil
 function M.render(bufnr)
   bufnr = bufnr or task_bufnr
   if not bufnr or not vim.api.nvim_buf_is_valid(bufnr) then
     return
   end
 
-  current_view = current_view or config.get().default_view
+  current_view = current_view or config.get().view.default
-  vim.api.nvim_buf_set_name(bufnr, 'pending://' .. current_view)
+  local view_label = current_view == 'priority' and 'queue' or current_view
-  local tasks = store.active_tasks()
+  vim.api.nvim_buf_set_name(bufnr, 'pending://' .. view_label)
+  local all_tasks = _store and _store:active_tasks() or {}
+  local tasks = {}
+  for _, task in ipairs(all_tasks) do
+    if not _hidden_ids[task.id] then
+      table.insert(tasks, task)
+    end
+  end
 
   local lines, line_meta
   if current_view == 'priority' then
@@ -229,25 +692,45 @@ function M.render(bufnr)
     lines, line_meta = views.category_view(tasks)
   end
 
+  if #lines == 0 and #_filter_predicates == 0 then
+    local default_cat = config.get().default_category
+    lines = { '# ' .. default_cat }
+    line_meta = { { type = 'header', category = default_cat } }
+  end
+
+  if #_filter_predicates > 0 then
+    table.insert(lines, 1, 'FILTER: ' .. table.concat(_filter_predicates, ' '))
+    table.insert(line_meta, 1, { type = 'filter' })
+  end
+
   _meta = line_meta
+  _dirty_rows = {}
 
   snapshot_folds(bufnr)
   vim.bo[bufnr].modifiable = true
   local saved = vim.bo[bufnr].undolevels
   vim.bo[bufnr].undolevels = -1
+  _rendering = true
   vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
+  _rendering = false
   vim.bo[bufnr].modified = false
   vim.bo[bufnr].undolevels = saved
 
   setup_syntax(bufnr)
   apply_extmarks(bufnr, line_meta)
 
+  local folding = config.resolve_folding()
   for _, winid in ipairs(vim.fn.win_findbuf(bufnr)) do
-    if current_view == 'category' then
+    if current_view == 'category' and folding.enabled then
       vim.wo[winid].foldmethod = 'expr'
       vim.wo[winid].foldexpr = 'v:lua.require("pending.buffer").get_fold()'
       vim.wo[winid].foldlevel = 99
       vim.wo[winid].foldenable = true
+      if folding.foldtext then
+        vim.wo[winid].foldtext = 'v:lua.require("pending.buffer").get_foldtext()'
+      else
+        vim.wo[winid].foldtext = 'foldtext()'
+      end
     else
       vim.wo[winid].foldmethod = 'manual'
       vim.wo[winid].foldenable = false
@@ -256,7 +739,9 @@ function M.render(bufnr)
   restore_folds(bufnr)
 end
 
+---@return nil
 function M.toggle_view()
+  snapshot_folds(task_bufnr)
   if current_view == 'category' then
     current_view = 'priority'
   else
@@ -268,7 +753,9 @@ end
 ---@return integer bufnr
 function M.open()
   setup_highlights()
-  store.load()
+  if _store then
+    _store:load()
+  end
 
   if task_winid and vim.api.nvim_win_is_valid(task_winid) then
     vim.api.nvim_set_current_win(task_winid)
@@ -279,6 +766,7 @@ function M.open()
   if not (task_bufnr and vim.api.nvim_buf_is_valid(task_bufnr)) then
     task_bufnr = vim.api.nvim_create_buf(true, false)
     set_buf_options(task_bufnr)
+    M.attach_bytes(task_bufnr)
   end
 
   vim.cmd('botright new')

lua/pending/complete.lua

@@ -0,0 +1,198 @@
+local config = require('pending.config')
+
+---@class pending.CompletionItem
+---@field word string
+---@field info string
+
+---@class pending.complete
+local M = {}
+
+---@return string
+local function date_key()
+  return config.get().date_syntax or 'due'
+end
+
+---@return string
+local function recur_key()
+  return config.get().recur_syntax or 'rec'
+end
+
+---@return string[]
+local function get_categories()
+  local s = require('pending.buffer').store()
+  if not s then
+    return {}
+  end
+  local seen = {}
+  local result = {}
+  for _, task in ipairs(s:active_tasks()) do
+    local cat = task.category
+    if cat and not seen[cat] then
+      seen[cat] = true
+      table.insert(result, cat)
+    end
+  end
+  table.sort(result)
+  return result
+end
+
+---@return pending.CompletionItem[]
+local function date_completions()
+  return {
+    { word = 'today', info = "Today's date" },
+    { word = 'tomorrow', info = "Tomorrow's date" },
+    { word = 'yesterday', info = "Yesterday's date" },
+    { word = '+1d', info = '1 day from today' },
+    { word = '+2d', info = '2 days from today' },
+    { word = '+3d', info = '3 days from today' },
+    { word = '+1w', info = '1 week from today' },
+    { word = '+2w', info = '2 weeks from today' },
+    { word = '+1m', info = '1 month from today' },
+    { word = 'mon', info = 'Next Monday' },
+    { word = 'tue', info = 'Next Tuesday' },
+    { word = 'wed', info = 'Next Wednesday' },
+    { word = 'thu', info = 'Next Thursday' },
+    { word = 'fri', info = 'Next Friday' },
+    { word = 'sat', info = 'Next Saturday' },
+    { word = 'sun', info = 'Next Sunday' },
+    { word = 'eod', info = 'End of day (today)' },
+    { word = 'eow', info = 'End of week (Sunday)' },
+    { word = 'eom', info = 'End of month' },
+    { word = 'eoq', info = 'End of quarter' },
+    { word = 'eoy', info = 'End of year (Dec 31)' },
+    { word = 'sow', info = 'Start of week (Monday)' },
+    { word = 'som', info = 'Start of month' },
+    { word = 'soq', info = 'Start of quarter' },
+    { word = 'soy', info = 'Start of year (Jan 1)' },
+    { word = 'later', info = 'Someday (sentinel date)' },
+    { word = 'today@08:00', info = 'Today at 08:00' },
+    { word = 'today@09:00', info = 'Today at 09:00' },
+    { word = 'today@10:00', info = 'Today at 10:00' },
+    { word = 'today@12:00', info = 'Today at 12:00' },
+    { word = 'today@14:00', info = 'Today at 14:00' },
+    { word = 'today@17:00', info = 'Today at 17:00' },
+  }
+end
+
+---@type table<string, string>
+local recur_descriptions = {
+  daily = 'Every day',
+  weekdays = 'Monday through Friday',
+  weekly = 'Every week',
+  biweekly = 'Every 2 weeks',
+  monthly = 'Every month',
+  quarterly = 'Every 3 months',
+  yearly = 'Every year',
+  ['2d'] = 'Every 2 days',
+  ['3d'] = 'Every 3 days',
+  ['2w'] = 'Every 2 weeks',
+  ['3w'] = 'Every 3 weeks',
+  ['2m'] = 'Every 2 months',
+  ['3m'] = 'Every 3 months',
+  ['6m'] = 'Every 6 months',
+  ['2y'] = 'Every 2 years',
+}
+
+---@return pending.CompletionItem[]
+local function recur_completions()
+  local recur = require('pending.recur')
+  local list = recur.shorthand_list()
+  local result = {}
+  for _, s in ipairs(list) do
+    local desc = recur_descriptions[s] or s
+    table.insert(result, { word = s, info = desc })
+  end
+  for _, s in ipairs(list) do
+    local desc = recur_descriptions[s] or s
+    table.insert(result, { word = '!' .. s, info = desc .. ' (from completion date)' })
+  end
+  return result
+end
+
+---@type string?
+local _complete_source = nil
+
+---@param findstart integer
+---@param base string
+---@return integer|table[]
+function M.omnifunc(findstart, base)
+  if findstart == 1 then
+    local line = vim.api.nvim_get_current_line()
+    local col = vim.api.nvim_win_get_cursor(0)[2]
+    local before = line:sub(1, col)
+
+    local dk = date_key()
+    local rk = recur_key()
+
+    local checks = {
+      { vim.pesc(dk) .. ':([%S]*)$', dk },
+      { 'cat:([%S]*)$', 'cat' },
+      { vim.pesc(rk) .. ':([%S]*)$', rk },
+      { 'gh:([%S]*)$', 'gh' },
+      { 'gl:([%S]*)$', 'gl' },
+      { 'cb:([%S]*)$', 'cb' },
+    }
+
+    for _, check in ipairs(checks) do
+      local start = before:find(check[1])
+      if start then
+        local colon_pos = before:find(':', start, true)
+        if colon_pos then
+          _complete_source = check[2]
+          return colon_pos
+        end
+      end
+    end
+
+    _complete_source = nil
+    return -1
+  end
+
+  local matches = {}
+  local source = _complete_source or ''
+
+  local dk = date_key()
+  local rk = recur_key()
+
+  if source == dk then
+    for _, c in ipairs(date_completions()) do
+      if base == '' or c.word:sub(1, #base) == base then
+        table.insert(matches, { word = c.word, menu = '[' .. source .. ']', info = c.info })
+      end
+    end
+  elseif source == 'cat' then
+    for _, c in ipairs(get_categories()) do
+      if base == '' or c:sub(1, #base) == base then
+        table.insert(matches, { word = c, menu = '[cat]' })
+      end
+    end
+  elseif source == rk then
+    for _, c in ipairs(recur_completions()) do
+      if base == '' or c.word:sub(1, #base) == base then
+        table.insert(matches, { word = c.word, menu = '[' .. source .. ']', info = c.info })
+      end
+    end
+  elseif source == 'gh' or source == 'gl' or source == 'cb' then
+    local s = require('pending.buffer').store()
+    if s then
+      local seen = {}
+      for _, task in ipairs(s:tasks()) do
+        if task._extra and task._extra._forge_ref then
+          local ref = task._extra._forge_ref
+          local key = ref.owner .. '/' .. ref.repo
+          if not seen[key] then
+            seen[key] = true
+            local word = key .. '#'
+            if base == '' or word:sub(1, #base) == base then
+              table.insert(matches, { word = word, menu = '[' .. source .. ']' })
+            end
+          end
+        end
+      end
+    end
+  end
+
+  return matches
+end
+
+return M

lua/pending/config.lua

@@ -1,16 +1,108 @@
+---@class pending.FoldingConfig
+---@field foldtext? string|false
+
+---@class pending.ResolvedFolding
+---@field enabled boolean
+---@field foldtext string|false
+
+---@class pending.Icons
+---@field pending string
+---@field done string
+---@field priority string
+---@field wip string
+---@field blocked string
+---@field due string
+---@field recur string
+---@field category string
+
 ---@class pending.GcalConfig
----@field calendar? string
+---@field remote_delete? boolean
 ---@field credentials_path? string
+---@field client_id? string
+---@field client_secret? string
+
+---@class pending.GtasksConfig
+---@field remote_delete? boolean
+---@field credentials_path? string
+---@field client_id? string
+---@field client_secret? string
+
+---@class pending.S3Config
+---@field bucket string
+---@field key? string
+---@field profile? string
+---@field region? string
+
+---@class pending.ForgeInstanceConfig
+---@field icon? string
+---@field issue_format? string
+---@field instances? string[]
+
+---@class pending.ForgeConfig
+---@field auto_close? boolean
+---@field warn_missing_cli? boolean
+---@field [string] pending.ForgeInstanceConfig
+
+---@class pending.SyncConfig
+---@field remote_delete? boolean
+---@field gcal? pending.GcalConfig
+---@field gtasks? pending.GtasksConfig
+---@field s3? pending.S3Config
+
+---@class pending.Keymaps
+---@field close? string|false
+---@field toggle? string|false
+---@field view? string|false
+---@field priority? string|false
+---@field date? string|false
+---@field undo? string|false
+---@field filter? string|false
+---@field open_line? string|false
+---@field open_line_above? string|false
+---@field a_task? string|false
+---@field i_task? string|false
+---@field a_category? string|false
+---@field i_category? string|false
+---@field next_header? string|false
+---@field prev_header? string|false
+---@field next_task? string|false
+---@field prev_task? string|false
+---@field category? string|false
+---@field recur? string|false
+---@field move_down? string|false
+---@field move_up? string|false
+---@field wip? string|false
+---@field blocked? string|false
+
+---@class pending.CategoryViewConfig
+---@field order? string[]
+---@field folding? boolean|pending.FoldingConfig
+
+---@class pending.QueueViewConfig
+
+---@class pending.ViewConfig
+---@field default? 'category'|'priority'
+---@field eol_format? string
+---@field category? pending.CategoryViewConfig
+---@field queue? pending.QueueViewConfig
 
 ---@class pending.Config
 ---@field data_path string
----@field default_view 'category'|'priority'
 ---@field default_category string
 ---@field date_format string
 ---@field date_syntax string
----@field category_order? string[]
+---@field recur_syntax string
+---@field someday_date string
+---@field input_date_formats? string[]
 ---@field drawer_height? integer
----@field gcal? pending.GcalConfig
+---@field debug? boolean
+---@field keymaps pending.Keymaps
+---@field view pending.ViewConfig
+---@field max_priority? integer
+---@field sync? pending.SyncConfig
+---@field lock_done? boolean
+---@field forge? pending.ForgeConfig
+---@field icons pending.Icons
 
 ---@class pending.config
 local M = {}
@@ -18,11 +110,79 @@ local M = {}
 ---@type pending.Config
 local defaults = {
   data_path = vim.fn.stdpath('data') .. '/pending/tasks.json',
-  default_view = 'category',
   default_category = 'Todo',
   date_format = '%b %d',
   date_syntax = 'due',
-  category_order = {},
+  recur_syntax = 'rec',
+  someday_date = '9999-12-30',
+  lock_done = true,
+  max_priority = 3,
+  view = {
+    default = 'category',
+    eol_format = '%c  %r  %d',
+    category = {
+      order = {},
+      folding = true,
+    },
+    queue = {},
+  },
+  keymaps = {
+    close = 'q',
+    toggle = '<CR>',
+    view = '<Tab>',
+    priority = 'g!',
+    date = 'gd',
+    undo = 'gz',
+    filter = 'gf',
+    open_line = 'o',
+    open_line_above = 'O',
+    a_task = 'at',
+    i_task = 'it',
+    a_category = 'aC',
+    i_category = 'iC',
+    next_header = ']]',
+    prev_header = '[[',
+    next_task = ']t',
+    prev_task = '[t',
+    category = 'gc',
+    recur = 'gr',
+    move_down = 'J',
+    move_up = 'K',
+    wip = 'gw',
+    blocked = 'gb',
+    priority_up = '<C-a>',
+    priority_down = '<C-x>',
+  },
+  sync = {},
+  forge = {
+    auto_close = false,
+    warn_missing_cli = true,
+    github = {
+      icon = '',
+      issue_format = '%i %o/%r#%n',
+      instances = {},
+    },
+    gitlab = {
+      icon = '',
+      issue_format = '%i %o/%r#%n',
+      instances = {},
+    },
+    codeberg = {
+      icon = '',
+      issue_format = '%i %o/%r#%n',
+      instances = {},
+    },
+  },
+  icons = {
+    pending = ' ',
+    done = 'x',
+    priority = '!',
+    wip = '>',
+    blocked = '=',
+    due = '.',
+    recur = '~',
+    category = '#',
+  },
 }
 
 ---@type pending.Config?
@@ -38,8 +198,20 @@ function M.get()
   return _resolved
 end
 
+---@return nil
 function M.reset()
   _resolved = nil
 end
 
+---@return pending.ResolvedFolding
+function M.resolve_folding()
+  local raw = M.get().view.category.folding
+  if raw == false then
+    return { enabled = false, foldtext = false }
+  elseif raw == true or raw == nil then
+    return { enabled = true, foldtext = '%c (%n tasks)' }
+  end
+  return { enabled = true, foldtext = raw.foldtext or false }
+end
+
 return M

lua/pending/diff.lua

@@ -1,6 +1,7 @@
 local config = require('pending.config')
+local forge = require('pending.forge')
+local log = require('pending.log')
 local parse = require('pending.parse')
-local store = require('pending.store')
 
 ---@class pending.ParsedEntry
 ---@field type 'task'|'header'|'blank'
@@ -10,6 +11,9 @@ local store = require('pending.store')
 ---@field status? string
 ---@field category? string
 ---@field due? string
+---@field rec? string
+---@field rec_mode? string
+---@field forge_ref? pending.ForgeRef
 ---@field lnum integer
 
 ---@class pending.diff
@@ -25,21 +29,37 @@ end
 function M.parse_buffer(lines)
   local result = {}
   local current_category = nil
+  local start = 1
+  if lines[1] and lines[1]:match('^FILTER:') then
+    start = 2
+  end
 
-  for i, line in ipairs(lines) do
+  for i = start, #lines do
-    local id, body = line:match('^/(%d+)/(- %[.%] .*)$')
+    local line = lines[i]
+    local id, body = line:match('^/(%d+)/(- %[.?%] .*)$')
     if not id then
-      body = line:match('^(- %[.%] .*)$')
+      body = line:match('^(- %[.?%] .*)$')
     end
     if line == '' then
       table.insert(result, { type = 'blank', lnum = i })
     elseif id or body then
-      local stripped = body:match('^- %[.%] (.*)$') or body
+      local stripped = body:match('^- %[.?%] (.*)$') or body
       local state_char = body:match('^- %[(.-)%]') or ' '
       local priority = state_char == '!' and 1 or 0
-      local status = state_char == 'x' and 'done' or 'pending'
+      local status
+      if state_char == 'x' then
+        status = 'done'
+      elseif state_char == '>' then
+        status = 'wip'
+      elseif state_char == '=' then
+        status = 'blocked'
+      else
+        status = 'pending'
+      end
       local description, metadata = parse.body(stripped)
       if description and description ~= '' then
+        local refs = forge.find_refs(description)
+        local forge_ref = refs[1] and refs[1].ref or nil
         table.insert(result, {
           type = 'task',
           id = id and tonumber(id) or nil,
@@ -48,11 +68,14 @@ function M.parse_buffer(lines)
           status = status,
           category = metadata.cat or current_category or config.get().default_category,
           due = metadata.due,
+          rec = metadata.rec,
+          rec_mode = metadata.rec_mode,
+          forge_ref = forge_ref,
           lnum = i,
         })
       end
-    elseif line:match('^## (.+)$') then
+    elseif line:match('^# (.+)$') then
-      current_category = line:match('^## (.+)$')
+      current_category = line:match('^# (.+)$')
       table.insert(result, { type = 'header', category = current_category, lnum = i })
     end
   end
@@ -61,10 +84,13 @@ function M.parse_buffer(lines)
 end
 
 ---@param lines string[]
-function M.apply(lines)
+---@param s pending.Store
+---@param hidden_ids? table<integer, true>
+---@return nil
+function M.apply(lines, s, hidden_ids)
   local parsed = M.parse_buffer(lines)
   local now = timestamp()
-  local data = store.data()
+  local data = s:data()
 
   local old_by_id = {}
   for _, task in ipairs(data.tasks) do
@@ -77,80 +103,114 @@ function M.apply(lines)
   local order_counter = 0
 
   for _, entry in ipairs(parsed) do
-    if entry.type ~= 'task' then
+    if entry.type == 'task' then
-      goto continue
+      order_counter = order_counter + 1
-    end
 
-    order_counter = order_counter + 1
+      if entry.id and old_by_id[entry.id] then
-
+        if seen_ids[entry.id] then
-    if entry.id and old_by_id[entry.id] then
+          s:add({
-      if seen_ids[entry.id] then
+            description = entry.description,
-        store.add({
+            category = entry.category,
+            priority = entry.priority,
+            due = entry.due,
+            recur = entry.rec,
+            recur_mode = entry.rec_mode,
+            order = order_counter,
+            _extra = entry.forge_ref and { _forge_ref = entry.forge_ref } or nil,
+          })
+        else
+          seen_ids[entry.id] = true
+          local task = old_by_id[entry.id]
+          if
+            config.get().lock_done
+            and task.status == 'done'
+            and entry.status == 'done'
+          then
+            if task.order ~= order_counter then
+              task.order = order_counter
+              task.modified = now
+            end
+            log.warn('cannot edit done task — toggle status first')
+          else
+            local changed = false
+            if task.description ~= entry.description then
+              task.description = entry.description
+              changed = true
+            end
+            if task.category ~= entry.category then
+              task.category = entry.category
+              changed = true
+            end
+            if entry.priority == 0 and task.priority > 0 then
+              task.priority = 0
+              changed = true
+            elseif entry.priority > 0 and task.priority == 0 then
+              task.priority = entry.priority
+              changed = true
+            end
+            if entry.due ~= nil and task.due ~= entry.due then
+              task.due = entry.due
+              changed = true
+            end
+            if entry.rec ~= nil then
+              if task.recur ~= entry.rec then
+                task.recur = entry.rec
+                changed = true
+              end
+              if task.recur_mode ~= entry.rec_mode then
+                task.recur_mode = entry.rec_mode
+                changed = true
+              end
+            end
+            if entry.forge_ref ~= nil then
+              if not task._extra then
+                task._extra = {}
+              end
+              task._extra._forge_ref = entry.forge_ref
+              changed = true
+            end
+            if entry.status and task.status ~= entry.status then
+              task.status = entry.status
+              if entry.status == 'done' then
+                task['end'] = now
+              else
+                task['end'] = nil
+              end
+              changed = true
+            end
+            if task.order ~= order_counter then
+              task.order = order_counter
+              changed = true
+            end
+            if changed then
+              task.modified = now
+            end
+          end
+        end
+      else
+        s:add({
           description = entry.description,
           category = entry.category,
           priority = entry.priority,
           due = entry.due,
+          recur = entry.rec,
+          recur_mode = entry.rec_mode,
           order = order_counter,
+          _extra = entry.forge_ref and { _forge_ref = entry.forge_ref } or nil,
         })
-      else
-        seen_ids[entry.id] = true
-        local task = old_by_id[entry.id]
-        local changed = false
-        if task.description ~= entry.description then
-          task.description = entry.description
-          changed = true
-        end
-        if task.category ~= entry.category then
-          task.category = entry.category
-          changed = true
-        end
-        if task.priority ~= entry.priority then
-          task.priority = entry.priority
-          changed = true
-        end
-        if task.due ~= entry.due then
-          task.due = entry.due
-          changed = true
-        end
-        if entry.status and task.status ~= entry.status then
-          task.status = entry.status
-          if entry.status == 'done' then
-            task['end'] = now
-          else
-            task['end'] = nil
-          end
-          changed = true
-        end
-        if task.order ~= order_counter then
-          task.order = order_counter
-          changed = true
-        end
-        if changed then
-          task.modified = now
-        end
       end
-    else
-      store.add({
-        description = entry.description,
-        category = entry.category,
-        priority = entry.priority,
-        due = entry.due,
-        order = order_counter,
-      })
     end
-
-    ::continue::
   end
 
   for id, task in pairs(old_by_id) do
-    if not seen_ids[id] then
+    if not seen_ids[id] and not (hidden_ids and hidden_ids[id]) then
       task.status = 'deleted'
       task['end'] = now
       task.modified = now
     end
   end
 
-  store.save()
+  s:save()
 end
 
 return M

lua/pending/forge.lua

@@ -0,0 +1,538 @@
+local config = require('pending.config')
+local log = require('pending.log')
+
+---@class pending.ForgeRef
+---@field forge string
+---@field owner string
+---@field repo string
+---@field type 'issue'|'pull_request'|'merge_request'
+---@field number integer
+---@field url string
+
+---@class pending.ForgeCache
+---@field title? string
+---@field state 'open'|'closed'|'merged'
+---@field labels? string[]
+---@field fetched_at string
+
+---@class pending.ForgeBackend
+---@field name string
+---@field shorthand string
+---@field default_host string
+---@field cli string
+---@field auth_cmd string
+---@field default_icon string
+---@field default_issue_format string
+---@field _warned boolean
+---@field parse_url fun(self: pending.ForgeBackend, url: string): pending.ForgeRef?
+---@field api_args fun(self: pending.ForgeBackend, ref: pending.ForgeRef): string[]
+---@field parse_state fun(self: pending.ForgeBackend, decoded: table): 'open'|'closed'|'merged'
+
+---@class pending.forge
+local M = {}
+
+---@type pending.ForgeBackend[]
+local _backends = {}
+
+---@type table<string, pending.ForgeBackend>
+local _by_name = {}
+
+---@type table<string, pending.ForgeBackend>
+local _by_shorthand = {}
+
+---@type table<string, pending.ForgeBackend>
+local _by_host = {}
+
+---@type boolean
+local _instances_resolved = false
+
+---@param backend pending.ForgeBackend
+---@return nil
+function M.register(backend)
+  backend._warned = false
+  table.insert(_backends, backend)
+  _by_name[backend.name] = backend
+  _by_shorthand[backend.shorthand] = backend
+  _by_host[backend.default_host] = backend
+  _instances_resolved = false
+end
+
+---@return pending.ForgeBackend[]
+function M.backends()
+  return _backends
+end
+
+local function _ensure_instances()
+  if _instances_resolved then
+    return
+  end
+  _instances_resolved = true
+  local cfg = config.get().forge or {}
+  for _, backend in ipairs(_backends) do
+    local forge_cfg = cfg[backend.name] or {}
+    for _, inst in ipairs(forge_cfg.instances or {}) do
+      _by_host[inst] = backend
+    end
+  end
+end
+
+---@param token string
+---@return pending.ForgeRef?
+function M._parse_shorthand(token)
+  local prefix, rest = token:match('^(%l%l):(.+)$')
+  if not prefix then
+    return nil
+  end
+  local backend = _by_shorthand[prefix]
+  if not backend then
+    return nil
+  end
+  local owner, repo, number = rest:match('^([%w%.%-_]+)/([%w%.%-_]+)#(%d+)$')
+  if not owner then
+    return nil
+  end
+  local num = tonumber(number) --[[@as integer]]
+  local url = 'https://' .. backend.default_host .. '/' .. owner .. '/' .. repo .. '/issues/' .. num
+  return {
+    forge = backend.name,
+    owner = owner,
+    repo = repo,
+    type = 'issue',
+    number = num,
+    url = url,
+  }
+end
+
+---@param url string
+---@return pending.ForgeRef?
+function M._parse_github_url(url)
+  local backend = _by_name['github']
+  if not backend then
+    return nil
+  end
+  return backend:parse_url(url)
+end
+
+---@param url string
+---@return pending.ForgeRef?
+function M._parse_gitlab_url(url)
+  local backend = _by_name['gitlab']
+  if not backend then
+    return nil
+  end
+  return backend:parse_url(url)
+end
+
+---@param url string
+---@return pending.ForgeRef?
+function M._parse_codeberg_url(url)
+  local backend = _by_name['codeberg']
+  if not backend then
+    return nil
+  end
+  return backend:parse_url(url)
+end
+
+---@param token string
+---@return pending.ForgeRef?
+function M.parse_ref(token)
+  local short = M._parse_shorthand(token)
+  if short then
+    return short
+  end
+  if not token:match('^https?://') then
+    return nil
+  end
+  _ensure_instances()
+  local host = token:match('^https?://([^/]+)')
+  if not host then
+    return nil
+  end
+  local backend = _by_host[host]
+  if not backend then
+    return nil
+  end
+  return backend:parse_url(token)
+end
+
+---@class pending.ForgeSpan
+---@field ref pending.ForgeRef
+---@field start_byte integer
+---@field end_byte integer
+---@field raw string
+
+---@param text string
+---@return pending.ForgeSpan[]
+function M.find_refs(text)
+  local results = {}
+  local pos = 1
+  while pos <= #text do
+    local ws = text:find('%S', pos)
+    if not ws then
+      break
+    end
+    local token_end = text:find('%s', ws)
+    local token = token_end and text:sub(ws, token_end - 1) or text:sub(ws)
+    local ref = M.parse_ref(token)
+    if ref then
+      local eb = token_end and (token_end - 1) or #text
+      table.insert(results, {
+        ref = ref,
+        start_byte = ws - 1,
+        end_byte = eb,
+        raw = token,
+      })
+    end
+    pos = token_end and token_end or (#text + 1)
+  end
+  return results
+end
+
+---@param ref pending.ForgeRef
+---@return string[]
+function M._api_args(ref)
+  local backend = _by_name[ref.forge]
+  if not backend then
+    return {}
+  end
+  return backend:api_args(ref)
+end
+
+---@param ref pending.ForgeRef
+---@param cache? pending.ForgeCache
+---@return string text
+---@return string hl_group
+function M.format_label(ref, cache)
+  local cfg = config.get().forge or {}
+  local forge_cfg = cfg[ref.forge] or {}
+  local backend = _by_name[ref.forge]
+  local default_icon = backend and backend.default_icon or ''
+  local default_fmt = backend and backend.default_issue_format or '%i %o/%r#%n'
+  local fmt = forge_cfg.issue_format or default_fmt
+  local icon = forge_cfg.icon or default_icon
+  local text = fmt
+    :gsub('%%i', icon)
+    :gsub('%%o', ref.owner)
+    :gsub('%%r', ref.repo)
+    :gsub('%%n', tostring(ref.number))
+  local hl = 'PendingForge'
+  if cache then
+    if cache.state == 'closed' or cache.state == 'merged' then
+      hl = 'PendingForgeClosed'
+    end
+  end
+  return text, hl
+end
+
+---@param ref pending.ForgeRef
+---@param callback fun(cache: pending.ForgeCache?)
+function M.fetch_metadata(ref, callback)
+  local args = M._api_args(ref)
+
+  vim.system(args, { text = true }, function(result)
+    if result.code ~= 0 or not result.stdout or result.stdout == '' then
+      vim.schedule(function()
+        local forge_cfg = config.get().forge or {}
+        local backend = _by_name[ref.forge]
+        if backend and forge_cfg.warn_missing_cli ~= false and not backend._warned then
+          backend._warned = true
+          log.warn(
+            ('%s not found or not authenticated — run `%s`'):format(backend.cli, backend.auth_cmd)
+          )
+        end
+        callback(nil)
+      end)
+      return
+    end
+    local ok, decoded = pcall(vim.json.decode, result.stdout)
+    if not ok or not decoded then
+      vim.schedule(function()
+        callback(nil)
+      end)
+      return
+    end
+    local backend = _by_name[ref.forge]
+    local state = backend and backend:parse_state(decoded) or 'open'
+    local labels = {}
+    if decoded.labels then
+      for _, label in ipairs(decoded.labels) do
+        if type(label) == 'string' then
+          table.insert(labels, label)
+        elseif type(label) == 'table' and label.name then
+          table.insert(labels, label.name)
+        end
+      end
+    end
+    local cache = {
+      title = decoded.title,
+      state = state,
+      labels = labels,
+      fetched_at = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]],
+    }
+    vim.schedule(function()
+      callback(cache)
+    end)
+  end)
+end
+
+---@param s pending.Store
+function M.refresh(s)
+  local tasks = s:tasks()
+  local pending_fetches = 0
+  local any_changed = false
+  local any_fetched = false
+  for _, task in ipairs(tasks) do
+    if task.status ~= 'deleted' and task._extra and task._extra._forge_ref then
+      local ref = task._extra._forge_ref --[[@as pending.ForgeRef]]
+      pending_fetches = pending_fetches + 1
+      M.fetch_metadata(ref, function(cache)
+        pending_fetches = pending_fetches - 1
+        if cache then
+          task._extra._forge_cache = cache
+          any_fetched = true
+          local forge_cfg = config.get().forge or {}
+          if
+            forge_cfg.auto_close
+            and (cache.state == 'closed' or cache.state == 'merged')
+            and (task.status == 'pending' or task.status == 'wip' or task.status == 'blocked')
+          then
+            task.status = 'done'
+            task['end'] = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+            task.modified = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+            any_changed = true
+          end
+        else
+          task._extra._forge_cache = {
+            state = 'open',
+            fetched_at = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]],
+          }
+        end
+        if pending_fetches == 0 then
+          if any_changed then
+            s:save()
+          end
+          local buffer = require('pending.buffer')
+          if
+            (any_changed or any_fetched)
+            and buffer.bufnr()
+            and vim.api.nvim_buf_is_valid(buffer.bufnr())
+          then
+            buffer.render()
+          end
+        end
+      end)
+    end
+  end
+  if pending_fetches == 0 then
+    log.info('No linked tasks to refresh.')
+  end
+end
+
+---@param opts {name: string, shorthand: string, default_host: string, cli?: string, auth_cmd?: string, default_icon?: string, default_issue_format?: string}
+---@return pending.ForgeBackend
+function M.gitea_backend(opts)
+  return {
+    name = opts.name,
+    shorthand = opts.shorthand,
+    default_host = opts.default_host,
+    cli = opts.cli or 'tea',
+    auth_cmd = opts.auth_cmd or 'tea login add',
+    default_icon = opts.default_icon or '',
+    default_issue_format = opts.default_issue_format or '%i %o/%r#%n',
+    _warned = false,
+    parse_url = function(self, url)
+      _ensure_instances()
+      local host, owner, repo, kind, number =
+        url:match('^https?://([^/]+)/([%w%.%-_]+)/([%w%.%-_]+)/(%a+)/(%d+)$')
+      if not host then
+        return nil
+      end
+      if kind ~= 'issues' and kind ~= 'pulls' then
+        return nil
+      end
+      if _by_host[host] ~= self then
+        return nil
+      end
+      local num = tonumber(number) --[[@as integer]]
+      local ref_type = kind == 'pulls' and 'pull_request' or 'issue'
+      return {
+        forge = self.name,
+        owner = owner,
+        repo = repo,
+        type = ref_type,
+        number = num,
+        url = url,
+      }
+    end,
+    api_args = function(self, ref)
+      local endpoint = ref.type == 'pull_request' and 'pulls' or 'issues'
+      return {
+        self.cli,
+        'api',
+        '/repos/' .. ref.owner .. '/' .. ref.repo .. '/' .. endpoint .. '/' .. ref.number,
+      }
+    end,
+    parse_state = function(_, decoded)
+      if decoded.state == 'closed' then
+        return 'closed'
+      end
+      return 'open'
+    end,
+  }
+end
+
+M.register({
+  name = 'github',
+  shorthand = 'gh',
+  default_host = 'github.com',
+  cli = 'gh',
+  auth_cmd = 'gh auth login',
+  default_icon = '',
+  default_issue_format = '%i %o/%r#%n',
+  _warned = false,
+  parse_url = function(self, url)
+    _ensure_instances()
+    local host, owner, repo, kind, number =
+      url:match('^https?://([^/]+)/([%w%.%-_]+)/([%w%.%-_]+)/(%a+)/(%d+)$')
+    if not host then
+      return nil
+    end
+    if kind ~= 'issues' and kind ~= 'pull' then
+      return nil
+    end
+    if _by_host[host] ~= self then
+      return nil
+    end
+    local num = tonumber(number) --[[@as integer]]
+    local ref_type = kind == 'pull' and 'pull_request' or 'issue'
+    return {
+      forge = 'github',
+      owner = owner,
+      repo = repo,
+      type = ref_type,
+      number = num,
+      url = url,
+    }
+  end,
+  api_args = function(_, ref)
+    return {
+      'gh',
+      'api',
+      '/repos/' .. ref.owner .. '/' .. ref.repo .. '/issues/' .. ref.number,
+    }
+  end,
+  parse_state = function(_, decoded)
+    if decoded.pull_request and decoded.pull_request.merged_at then
+      return 'merged'
+    elseif decoded.state == 'closed' then
+      return 'closed'
+    end
+    return 'open'
+  end,
+})
+
+M.register({
+  name = 'gitlab',
+  shorthand = 'gl',
+  default_host = 'gitlab.com',
+  cli = 'glab',
+  auth_cmd = 'glab auth login',
+  default_icon = '',
+  default_issue_format = '%i %o/%r#%n',
+  _warned = false,
+  parse_url = function(self, url)
+    _ensure_instances()
+    local host, path, kind, number = url:match('^https?://([^/]+)/(.+)/%-/([%w_]+)/(%d+)$')
+    if not host then
+      return nil
+    end
+    if kind ~= 'issues' and kind ~= 'merge_requests' then
+      return nil
+    end
+    if _by_host[host] ~= self then
+      return nil
+    end
+    local owner, repo = path:match('^(.+)/([^/]+)$')
+    if not owner then
+      return nil
+    end
+    local num = tonumber(number) --[[@as integer]]
+    local ref_type = kind == 'merge_requests' and 'merge_request' or 'issue'
+    return {
+      forge = 'gitlab',
+      owner = owner,
+      repo = repo,
+      type = ref_type,
+      number = num,
+      url = url,
+    }
+  end,
+  api_args = function(_, ref)
+    local encoded = (ref.owner .. '/' .. ref.repo):gsub('/', '%%2F')
+    local endpoint = ref.type == 'merge_request' and 'merge_requests' or 'issues'
+    return {
+      'glab',
+      'api',
+      '/projects/' .. encoded .. '/' .. endpoint .. '/' .. ref.number,
+    }
+  end,
+  parse_state = function(_, decoded)
+    if decoded.state == 'merged' then
+      return 'merged'
+    elseif decoded.state == 'closed' then
+      return 'closed'
+    end
+    return 'open'
+  end,
+})
+
+M.register({
+  name = 'codeberg',
+  shorthand = 'cb',
+  default_host = 'codeberg.org',
+  cli = 'tea',
+  auth_cmd = 'tea login add',
+  default_icon = '',
+  default_issue_format = '%i %o/%r#%n',
+  _warned = false,
+  parse_url = function(self, url)
+    _ensure_instances()
+    local host, owner, repo, kind, number =
+      url:match('^https?://([^/]+)/([%w%.%-_]+)/([%w%.%-_]+)/(%a+)/(%d+)$')
+    if not host then
+      return nil
+    end
+    if kind ~= 'issues' and kind ~= 'pulls' then
+      return nil
+    end
+    if _by_host[host] ~= self then
+      return nil
+    end
+    local num = tonumber(number) --[[@as integer]]
+    local ref_type = kind == 'pulls' and 'pull_request' or 'issue'
+    return {
+      forge = 'codeberg',
+      owner = owner,
+      repo = repo,
+      type = ref_type,
+      number = num,
+      url = url,
+    }
+  end,
+  api_args = function(_, ref)
+    local endpoint = ref.type == 'pull_request' and 'pulls' or 'issues'
+    return {
+      'tea',
+      'api',
+      '/repos/' .. ref.owner .. '/' .. ref.repo .. '/' .. endpoint .. '/' .. ref.number,
+    }
+  end,
+  parse_state = function(_, decoded)
+    if decoded.state == 'closed' then
+      return 'closed'
+    end
+    return 'open'
+  end,
+})
+
+return M

lua/pending/health.lua

@@ -1,5 +1,6 @@
 local M = {}
 
+---@return nil
 function M.check()
   vim.health.start('pending.nvim')
 
@@ -9,42 +10,64 @@ function M.check()
     return
   end
 
-  local cfg = config.get()
+  config.get()
   vim.health.ok('Config loaded')
-  vim.health.info('Data path: ' .. cfg.data_path)
 
-  local data_dir = vim.fn.fnamemodify(cfg.data_path, ':h')
+  local store_ok, store = pcall(require, 'pending.store')
-  if vim.fn.isdirectory(data_dir) == 1 then
+  if not store_ok then
-    vim.health.ok('Data directory exists: ' .. data_dir)
+    vim.health.error('Failed to load pending.store')
-  else
+    return
-    vim.health.warn('Data directory does not exist yet: ' .. data_dir)
   end
 
-  if vim.fn.filereadable(cfg.data_path) == 1 then
+  local resolved_path = store.resolve_path()
-    local store_ok, store = pcall(require, 'pending.store')
+  vim.health.info('Store path: ' .. resolved_path)
-    if store_ok then
+
-      local load_ok, err = pcall(store.load)
+  if vim.fn.filereadable(resolved_path) == 1 then
-      if load_ok then
+    local s = store.new(resolved_path)
-        local tasks = store.tasks()
+    local load_ok, err = pcall(function()
-        vim.health.ok('Data file loaded: ' .. #tasks .. ' tasks')
+      s:load()
-      else
+    end)
-        vim.health.error('Failed to load data file: ' .. tostring(err))
+    if load_ok then
+      local tasks = s:tasks()
+      vim.health.ok('Data file loaded: ' .. #tasks .. ' tasks')
+      local recur = require('pending.recur')
+      local invalid_count = 0
+      for _, task in ipairs(tasks) do
+        if task.recur and not recur.validate(task.recur) then
+          invalid_count = invalid_count + 1
+          vim.health.warn('Task ' .. task.id .. ' has invalid recurrence spec: ' .. task.recur)
+        end
+      end
+      if invalid_count == 0 then
+        vim.health.ok('All recurrence specs are valid')
+      end
+    else
+      vim.health.error('Failed to load data file: ' .. tostring(err))
+    end
+  end
+
+  vim.health.start('pending.nvim: forge')
+  local forge = require('pending.forge')
+  for _, backend in ipairs(forge.backends()) do
+    if vim.fn.executable(backend.cli) == 1 then
+      vim.health.ok(('%s found'):format(backend.cli))
+    else
+      vim.health.warn(('%s not found — run `%s`'):format(backend.cli, backend.auth_cmd))
+    end
+  end
+
+  local sync_paths = vim.fn.globpath(vim.o.runtimepath, 'lua/pending/sync/*.lua', false, true)
+  if #sync_paths == 0 then
+    vim.health.info('No sync backends found')
+  else
+    for _, path in ipairs(sync_paths) do
+      local name = vim.fn.fnamemodify(path, ':t:r')
+      local bok, backend = pcall(require, 'pending.sync.' .. name)
+      if bok and backend.name and type(backend.health) == 'function' then
+        vim.health.start('pending.nvim: sync/' .. name)
+        backend.health()
       end
     end
-  else
-    vim.health.info('No data file yet (will be created on first save)')
-  end
-
-  if vim.fn.executable('curl') == 1 then
-    vim.health.ok('curl found (required for Google Calendar sync)')
-  else
-    vim.health.warn('curl not found (needed for Google Calendar sync)')
-  end
-
-  if vim.fn.executable('openssl') == 1 then
-    vim.health.ok('openssl found (required for OAuth PKCE)')
-  else
-    vim.health.warn('openssl not found (needed for Google Calendar OAuth)')
   end
 end
 

lua/pending/log.lua

@@ -0,0 +1,30 @@
+---@class pending.log
+local M = {}
+
+local PREFIX = '[pending.nvim]: '
+
+---@param msg string
+function M.info(msg)
+  vim.notify(PREFIX .. msg)
+end
+
+---@param msg string
+function M.warn(msg)
+  vim.notify(PREFIX .. msg, vim.log.levels.WARN)
+end
+
+---@param msg string
+function M.error(msg)
+  vim.notify(PREFIX .. msg, vim.log.levels.ERROR)
+end
+
+---@param msg string
+---@param override? boolean
+function M.debug(msg, override)
+  local cfg = require('pending.config').get()
+  if cfg.debug or override then
+    vim.notify(PREFIX .. msg, vim.log.levels.DEBUG)
+  end
+end
+
+return M

lua/pending/parse.lua

@@ -1,5 +1,12 @@
 local config = require('pending.config')
 
+---@class pending.Metadata
+---@field due? string
+---@field cat? string
+---@field rec? string
+---@field rec_mode? 'scheduled'|'completion'
+---@field priority? integer
+
 ---@class pending.parse
 local M = {}
 
@@ -24,11 +31,92 @@ local function is_valid_date(s)
   return check.year == yn and check.month == mn and check.day == dn
 end
 
+---@param s string
+---@return boolean
+local function is_valid_time(s)
+  local h, m = s:match('^(%d%d):(%d%d)$')
+  if not h then
+    return false
+  end
+  local hn = tonumber(h) --[[@as integer]]
+  local mn = tonumber(m) --[[@as integer]]
+  return hn >= 0 and hn <= 23 and mn >= 0 and mn <= 59
+end
+
+---@param s string
+---@return string|nil
+local function normalize_time(s)
+  local h, m, period
+
+  h, m, period = s:match('^(%d+):(%d%d)([ap]m)$')
+  if not h then
+    h, period = s:match('^(%d+)([ap]m)$')
+    if h then
+      m = '00'
+    end
+  end
+  if not h then
+    h, m = s:match('^(%d%d):(%d%d)$')
+  end
+  if not h then
+    h, m = s:match('^(%d):(%d%d)$')
+  end
+  if not h then
+    h = s:match('^(%d+)$')
+    if h then
+      m = '00'
+    end
+  end
+
+  if not h then
+    return nil
+  end
+
+  local hn = tonumber(h) --[[@as integer]]
+  local mn = tonumber(m) --[[@as integer]]
+
+  if period then
+    if hn < 1 or hn > 12 then
+      return nil
+    end
+    if period == 'am' then
+      hn = hn == 12 and 0 or hn
+    else
+      hn = hn == 12 and 12 or hn + 12
+    end
+  else
+    if hn < 0 or hn > 23 then
+      return nil
+    end
+  end
+
+  if mn < 0 or mn > 59 then
+    return nil
+  end
+
+  return string.format('%02d:%02d', hn, mn)
+end
+
+---@param s string
+---@return boolean
+local function is_valid_datetime(s)
+  local date_part, time_part = s:match('^(.+)T(.+)$')
+  if not date_part then
+    return is_valid_date(s)
+  end
+  return is_valid_date(date_part) and is_valid_time(time_part)
+end
+
 ---@return string
 local function date_key()
   return config.get().date_syntax or 'due'
 end
 
+---@return string
+local function recur_key()
+  return config.get().recur_syntax or 'rec'
+end
+
 local weekday_map = {
   sun = 1,
   mon = 2,
@@ -39,53 +127,402 @@ local weekday_map = {
   sat = 7,
 }
 
+local month_map = {
+  jan = 1,
+  feb = 2,
+  mar = 3,
+  apr = 4,
+  may = 5,
+  jun = 6,
+  jul = 7,
+  aug = 8,
+  sep = 9,
+  oct = 10,
+  nov = 11,
+  dec = 12,
+}
+
+---@param today osdate
+---@return string
+local function today_str(today)
+  return os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day })) --[[@as string]]
+end
+
+---@param date_part string
+---@param time_suffix? string
+---@return string
+local function append_time(date_part, time_suffix)
+  if time_suffix then
+    return date_part .. 'T' .. time_suffix
+  end
+  return date_part
+end
+
+---@param name string
+---@return integer?
+local function month_name_to_num(name)
+  return month_map[name:lower():sub(1, 3)]
+end
+
+---@param fmt string
+---@return string, string[]
+local function input_format_to_pattern(fmt)
+  local fields = {}
+  local parts = {}
+  local i = 1
+  while i <= #fmt do
+    local c = fmt:sub(i, i)
+    if c == '%' and i < #fmt then
+      local spec = fmt:sub(i + 1, i + 1)
+      if spec == '%' then
+        parts[#parts + 1] = '%%'
+        i = i + 2
+      elseif spec == 'Y' then
+        fields[#fields + 1] = 'year'
+        parts[#parts + 1] = '(%d%d%d%d)'
+        i = i + 2
+      elseif spec == 'y' then
+        fields[#fields + 1] = 'year2'
+        parts[#parts + 1] = '(%d%d)'
+        i = i + 2
+      elseif spec == 'm' then
+        fields[#fields + 1] = 'month_num'
+        parts[#parts + 1] = '(%d%d?)'
+        i = i + 2
+      elseif spec == 'd' or spec == 'e' then
+        fields[#fields + 1] = 'day'
+        parts[#parts + 1] = '(%d%d?)'
+        i = i + 2
+      elseif spec == 'b' or spec == 'B' then
+        fields[#fields + 1] = 'month_name'
+        parts[#parts + 1] = '(%a+)'
+        i = i + 2
+      else
+        parts[#parts + 1] = vim.pesc(c)
+        i = i + 1
+      end
+    else
+      parts[#parts + 1] = vim.pesc(c)
+      i = i + 1
+    end
+  end
+  return '^' .. table.concat(parts) .. '$', fields
+end
+
+---@param date_input string
+---@param time_suffix? string
+---@return string?
+local function try_input_date_formats(date_input, time_suffix)
+  local fmts = config.get().input_date_formats
+  if not fmts or #fmts == 0 then
+    return nil
+  end
+  local today = os.date('*t') --[[@as osdate]]
+  for _, fmt in ipairs(fmts) do
+    local pat, fields = input_format_to_pattern(fmt)
+    local caps = { date_input:match(pat) }
+    if caps[1] ~= nil then
+      local year, month, day
+      for j = 1, #fields do
+        local field = fields[j]
+        local val = caps[j]
+        if field == 'year' then
+          year = tonumber(val)
+        elseif field == 'year2' then
+          local y = tonumber(val) --[[@as integer]]
+          year = y + (y >= 70 and 1900 or 2000)
+        elseif field == 'month_num' then
+          month = tonumber(val)
+        elseif field == 'day' then
+          day = tonumber(val)
+        elseif field == 'month_name' then
+          month = month_name_to_num(val)
+        end
+      end
+      if month and day then
+        if not year then
+          year = today.year
+          if month < today.month or (month == today.month and day < today.day) then
+            year = year + 1
+          end
+        end
+        local t = os.time({ year = year, month = month, day = day })
+        local check = os.date('*t', t) --[[@as osdate]]
+        if check.year == year and check.month == month and check.day == day then
+          return append_time(os.date('%Y-%m-%d', t) --[[@as string]], time_suffix)
+        end
+      end
+    end
+  end
+  return nil
+end
+
 ---@param text string
 ---@return string|nil
 function M.resolve_date(text)
-  local lower = text:lower()
+  local date_input, time_suffix = text:match('^(.+)@(.+)$')
+  if time_suffix then
+    time_suffix = normalize_time(time_suffix)
+    if not time_suffix then
+      return nil
+    end
+  else
+    date_input = text
+  end
+
+  local dt = date_input:match('^(%d%d%d%d%-%d%d%-%d%dT%d%d:%d%d)$')
+  if dt then
+    local dp, tp = dt:match('^(.+)T(.+)$')
+    if is_valid_date(dp) and is_valid_time(tp) then
+      return dt
+    end
+    return nil
+  end
+
+  if is_valid_date(date_input) then
+    return append_time(date_input, time_suffix)
+  end
+
+  local lower = date_input:lower()
   local today = os.date('*t') --[[@as osdate]]
 
-  if lower == 'today' then
+  if lower == 'today' or lower == 'eod' then
-    return os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day })) --[[@as string]]
+    return append_time(today_str(today), time_suffix)
+  end
+
+  if lower == 'yesterday' then
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day - 1 })) --[[@as string]],
+      time_suffix
+    )
   end
 
   if lower == 'tomorrow' then
-    return os.date(
+    return append_time(
-      '%Y-%m-%d',
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day + 1 })) --[[@as string]],
-      os.time({ year = today.year, month = today.month, day = today.day + 1 })
+      time_suffix
-    ) --[[@as string]]
+    )
+  end
+
+  if lower == 'sow' then
+    local delta = -((today.wday - 2) % 7)
+    return append_time(
+      os.date(
+        '%Y-%m-%d',
+        os.time({ year = today.year, month = today.month, day = today.day + delta })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'eow' then
+    local delta = (1 - today.wday) % 7
+    return append_time(
+      os.date(
+        '%Y-%m-%d',
+        os.time({ year = today.year, month = today.month, day = today.day + delta })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'som' then
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = 1 })) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'eom' then
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month + 1, day = 0 })) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'soq' then
+    local q = math.ceil(today.month / 3)
+    local first_month = (q - 1) * 3 + 1
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = first_month, day = 1 })) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'eoq' then
+    local q = math.ceil(today.month / 3)
+    local last_month = q * 3
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = last_month + 1, day = 0 })) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'soy' then
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = 1, day = 1 })) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'eoy' then
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = 12, day = 31 })) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  if lower == 'later' or lower == 'someday' then
+    return append_time(config.get().someday_date, time_suffix)
   end
 
   local n = lower:match('^%+(%d+)d$')
   if n then
-    return os.date(
+    return append_time(
-      '%Y-%m-%d',
+      os.date(
-      os.time({
+        '%Y-%m-%d',
-        year = today.year,
+        os.time({
-        month = today.month,
+          year = today.year,
-        day = today.day + (
+          month = today.month,
-            tonumber(n) --[[@as integer]]
+          day = today.day + (
-          ),
+              tonumber(n) --[[@as integer]]
-      })
+            ),
-    ) --[[@as string]]
+        })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  n = lower:match('^%+(%d+)w$')
+  if n then
+    return append_time(
+      os.date(
+        '%Y-%m-%d',
+        os.time({
+          year = today.year,
+          month = today.month,
+          day = today.day + (
+              tonumber(n) --[[@as integer]]
+            ) * 7,
+        })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  n = lower:match('^%+(%d+)m$')
+  if n then
+    return append_time(
+      os.date(
+        '%Y-%m-%d',
+        os.time({
+          year = today.year,
+          month = today.month + (
+              tonumber(n) --[[@as integer]]
+            ),
+          day = today.day,
+        })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  n = lower:match('^%-(%d+)d$')
+  if n then
+    return append_time(
+      os.date(
+        '%Y-%m-%d',
+        os.time({
+          year = today.year,
+          month = today.month,
+          day = today.day - (
+              tonumber(n) --[[@as integer]]
+            ),
+        })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  n = lower:match('^%-(%d+)w$')
+  if n then
+    return append_time(
+      os.date(
+        '%Y-%m-%d',
+        os.time({
+          year = today.year,
+          month = today.month,
+          day = today.day - (
+              tonumber(n) --[[@as integer]]
+            ) * 7,
+        })
+      ) --[[@as string]],
+      time_suffix
+    )
+  end
+
+  local ord = lower:match('^(%d+)[snrt][tdh]$')
+  if ord then
+    local day_num = tonumber(ord) --[[@as integer]]
+    if day_num >= 1 and day_num <= 31 then
+      local m, y = today.month, today.year
+      if today.day >= day_num then
+        m = m + 1
+        if m > 12 then
+          m = 1
+          y = y + 1
+        end
+      end
+      local t = os.time({ year = y, month = m, day = day_num })
+      local check = os.date('*t', t) --[[@as osdate]]
+      if check.day == day_num then
+        return append_time(os.date('%Y-%m-%d', t) --[[@as string]], time_suffix)
+      end
+      m = m + 1
+      if m > 12 then
+        m = 1
+        y = y + 1
+      end
+      t = os.time({ year = y, month = m, day = day_num })
+      check = os.date('*t', t) --[[@as osdate]]
+      if check.day == day_num then
+        return append_time(os.date('%Y-%m-%d', t) --[[@as string]], time_suffix)
+      end
+      return nil
+    end
+  end
+
+  local target_month = month_map[lower]
+  if target_month then
+    local y = today.year
+    if today.month >= target_month then
+      y = y + 1
+    end
+    return append_time(
+      os.date('%Y-%m-%d', os.time({ year = y, month = target_month, day = 1 })) --[[@as string]],
+      time_suffix
+    )
   end
 
   local target_wday = weekday_map[lower]
   if target_wday then
     local current_wday = today.wday
     local delta = (target_wday - current_wday) % 7
-    return os.date(
+    return append_time(
-      '%Y-%m-%d',
+      os.date(
-      os.time({ year = today.year, month = today.month, day = today.day + delta })
+        '%Y-%m-%d',
-    ) --[[@as string]]
+        os.time({ year = today.year, month = today.month, day = today.day + delta })
+      ) --[[@as string]],
+      time_suffix
+    )
   end
 
-  return nil
+  return try_input_date_formats(date_input, time_suffix)
 end
 
 ---@param text string
 ---@return string description
----@return { due?: string, cat?: string } metadata
+---@return pending.Metadata metadata
 function M.body(text)
   local tokens = {}
   for token in text:gmatch('%S+') do
@@ -95,8 +532,10 @@ function M.body(text)
   local metadata = {}
   local i = #tokens
   local dk = date_key()
-  local date_pattern_strict = '^' .. vim.pesc(dk) .. ':(%d%d%d%d%-%d%d%-%d%d)$'
+  local rk = recur_key()
+  local date_pattern_strict = '^' .. vim.pesc(dk) .. ':(%d%d%d%d%-%d%d%-%d%d[T%d:]*)$'
   local date_pattern_any = '^' .. vim.pesc(dk) .. ':(.+)$'
+  local rec_pattern = '^' .. vim.pesc(rk) .. ':(%S+)$'
 
   while i >= 1 do
     local token = tokens[i]
@@ -105,7 +544,7 @@ function M.body(text)
       if metadata.due then
         break
       end
-      if not is_valid_date(due_val) then
+      if not is_valid_datetime(due_val) then
         break
       end
       metadata.due = due_val
@@ -131,7 +570,35 @@ function M.body(text)
           metadata.cat = cat_val
           i = i - 1
         else
-          break
+          local pri_bangs = token:match('^%+(!+)$')
+          if pri_bangs then
+            if metadata.priority then
+              break
+            end
+            local max = config.get().max_priority or 3
+            metadata.priority = math.min(#pri_bangs, max)
+            i = i - 1
+          else
+            local rec_val = token:match(rec_pattern)
+            if rec_val then
+              if metadata.rec then
+                break
+              end
+              local recur = require('pending.recur')
+              local raw_spec = rec_val
+              if raw_spec:sub(1, 1) == '!' then
+                metadata.rec_mode = 'completion'
+                raw_spec = raw_spec:sub(2)
+              end
+              if not recur.validate(raw_spec) then
+                break
+              end
+              metadata.rec = raw_spec
+              i = i - 1
+            else
+              break
+            end
+          end
         end
       end
     end
@@ -148,7 +615,7 @@ end
 
 ---@param text string
 ---@return string description
----@return { due?: string, cat?: string } metadata
+---@return pending.Metadata metadata
 function M.command_add(text)
   local cat_prefix = text:match('^(%S.-):%s')
   if cat_prefix then
@@ -165,4 +632,66 @@ function M.command_add(text)
   return M.body(text)
 end
 
+---@param due string
+---@return boolean
+function M.is_overdue(due)
+  local now = os.date('*t') --[[@as osdate]]
+  local today = os.date('%Y-%m-%d') --[[@as string]]
+  local date_part, time_part = due:match('^(.+)T(.+)$')
+  if not date_part then
+    return due < today
+  end
+  if date_part < today then
+    return true
+  end
+  if date_part > today then
+    return false
+  end
+  local current_time = string.format('%02d:%02d', now.hour, now.min)
+  return time_part < current_time
+end
+
+---@param due string
+---@return boolean
+function M.is_today(due)
+  local now = os.date('*t') --[[@as osdate]]
+  local today = os.date('%Y-%m-%d') --[[@as string]]
+  local date_part, time_part = due:match('^(.+)T(.+)$')
+  if not date_part then
+    return due == today
+  end
+  if date_part ~= today then
+    return false
+  end
+  local current_time = string.format('%02d:%02d', now.hour, now.min)
+  return time_part >= current_time
+end
+
+---@param s? string
+---@return integer?
+function M.parse_duration_to_days(s)
+  if s == nil or s == '' then
+    return nil
+  end
+  local n = s:match('^(%d+)d$')
+  if n then
+    return tonumber(n) --[[@as integer]]
+  end
+  n = s:match('^(%d+)w$')
+  if n then
+    return tonumber(n) --[[@as integer]]
+      * 7
+  end
+  n = s:match('^(%d+)m$')
+  if n then
+    return tonumber(n) --[[@as integer]]
+      * 30
+  end
+  n = s:match('^(%d+)$')
+  if n then
+    return tonumber(n) --[[@as integer]]
+  end
+  return nil
+end
+
 return M

lua/pending/recur.lua

@@ -0,0 +1,188 @@
+---@class pending.RecurSpec
+---@field freq 'daily'|'weekly'|'monthly'|'yearly'
+---@field interval integer
+---@field byday? string[]
+---@field from_completion boolean
+---@field _raw? string
+
+---@class pending.recur
+local M = {}
+
+---@type table<string, pending.RecurSpec>
+local named = {
+  daily = { freq = 'daily', interval = 1, from_completion = false },
+  weekdays = {
+    freq = 'weekly',
+    interval = 1,
+    byday = { 'MO', 'TU', 'WE', 'TH', 'FR' },
+    from_completion = false,
+  },
+  weekly = { freq = 'weekly', interval = 1, from_completion = false },
+  biweekly = { freq = 'weekly', interval = 2, from_completion = false },
+  monthly = { freq = 'monthly', interval = 1, from_completion = false },
+  quarterly = { freq = 'monthly', interval = 3, from_completion = false },
+  yearly = { freq = 'yearly', interval = 1, from_completion = false },
+  annual = { freq = 'yearly', interval = 1, from_completion = false },
+}
+
+---@param spec string
+---@return pending.RecurSpec?
+function M.parse(spec)
+  local from_completion = false
+  local s = spec
+
+  if s:sub(1, 1) == '!' then
+    from_completion = true
+    s = s:sub(2)
+  end
+
+  local lower = s:lower()
+
+  local base = named[lower]
+  if base then
+    return {
+      freq = base.freq,
+      interval = base.interval,
+      byday = base.byday,
+      from_completion = from_completion,
+    }
+  end
+
+  local n, unit = lower:match('^(%d+)([dwmy])$')
+  if n then
+    local num = tonumber(n) --[[@as integer]]
+    if num < 1 then
+      return nil
+    end
+    local freq_map = { d = 'daily', w = 'weekly', m = 'monthly', y = 'yearly' }
+    return {
+      freq = freq_map[unit],
+      interval = num,
+      from_completion = from_completion,
+    }
+  end
+
+  if s:match('^FREQ=') then
+    return {
+      freq = 'daily',
+      interval = 1,
+      from_completion = from_completion,
+      _raw = s,
+    }
+  end
+
+  return nil
+end
+
+---@param spec string
+---@return boolean
+function M.validate(spec)
+  return M.parse(spec) ~= nil
+end
+
+---@param due string
+---@return string date_part
+---@return string? time_part
+local function split_datetime(due)
+  local dp, tp = due:match('^(.+)T(.+)$')
+  if dp then
+    return dp, tp
+  end
+  return due, nil
+end
+
+---@param base_date string
+---@param freq string
+---@param interval integer
+---@return string
+local function advance_date(base_date, freq, interval)
+  local date_part, time_part = split_datetime(base_date)
+  local y, m, d = date_part:match('^(%d+)-(%d+)-(%d+)$')
+  local yn = tonumber(y) --[[@as integer]]
+  local mn = tonumber(m) --[[@as integer]]
+  local dn = tonumber(d) --[[@as integer]]
+
+  local result
+  if freq == 'daily' then
+    result = os.date('%Y-%m-%d', os.time({ year = yn, month = mn, day = dn + interval })) --[[@as string]]
+  elseif freq == 'weekly' then
+    result = os.date('%Y-%m-%d', os.time({ year = yn, month = mn, day = dn + interval * 7 })) --[[@as string]]
+  elseif freq == 'monthly' then
+    local new_m = mn + interval
+    local new_y = yn
+    while new_m > 12 do
+      new_m = new_m - 12
+      new_y = new_y + 1
+    end
+    local last_day = os.date('*t', os.time({ year = new_y, month = new_m + 1, day = 0 })) --[[@as osdate]]
+    local clamped_d = math.min(dn, last_day.day --[[@as integer]])
+    result = os.date('%Y-%m-%d', os.time({ year = new_y, month = new_m, day = clamped_d })) --[[@as string]]
+  elseif freq == 'yearly' then
+    local new_y = yn + interval
+    local last_day = os.date('*t', os.time({ year = new_y, month = mn + 1, day = 0 })) --[[@as osdate]]
+    local clamped_d = math.min(dn, last_day.day --[[@as integer]])
+    result = os.date('%Y-%m-%d', os.time({ year = new_y, month = mn, day = clamped_d })) --[[@as string]]
+  else
+    return base_date
+  end
+
+  if time_part then
+    return result .. 'T' .. time_part
+  end
+  return result
+end
+
+---@param base_date string
+---@param spec string
+---@param mode 'scheduled'|'completion'
+---@return string
+function M.next_due(base_date, spec, mode)
+  local parsed = M.parse(spec)
+  if not parsed then
+    return base_date
+  end
+
+  local today = os.date('%Y-%m-%d') --[[@as string]]
+  local _, time_part = split_datetime(base_date)
+
+  if mode == 'completion' then
+    local base = time_part and (today .. 'T' .. time_part) or today
+    return advance_date(base, parsed.freq, parsed.interval)
+  end
+
+  local next_date = advance_date(base_date, parsed.freq, parsed.interval)
+  local compare_today = time_part and (today .. 'T' .. time_part) or today
+  while next_date <= compare_today do
+    next_date = advance_date(next_date, parsed.freq, parsed.interval)
+  end
+  return next_date
+end
+
+---@param spec string
+---@return string
+function M.to_rrule(spec)
+  local parsed = M.parse(spec)
+  if not parsed then
+    return ''
+  end
+
+  if parsed._raw then
+    return 'RRULE:' .. parsed._raw
+  end
+
+  local parts = { 'FREQ=' .. parsed.freq:upper() }
+  if parsed.interval > 1 then
+    table.insert(parts, 'INTERVAL=' .. parsed.interval)
+  end
+  if parsed.byday then
+    table.insert(parts, 'BYDAY=' .. table.concat(parsed.byday, ','))
+  end
+  return 'RRULE:' .. table.concat(parts, ';')
+end
+
+---@return string[]
+function M.shorthand_list()
+  return { 'daily', 'weekdays', 'weekly', 'biweekly', 'monthly', 'quarterly', 'yearly', 'annual' }
+end
+
+return M

lua/pending/store.lua

@@ -3,10 +3,12 @@ local config = require('pending.config')
 ---@class pending.Task
 ---@field id integer
 ---@field description string
----@field status 'pending'|'done'|'deleted'
+---@field status 'pending'|'done'|'deleted'|'wip'|'blocked'
 ---@field category? string
 ---@field priority integer
 ---@field due? string
+---@field recur? string
+---@field recur_mode? 'scheduled'|'completion'
 ---@field entry string
 ---@field modified string
 ---@field end? string
@@ -17,21 +19,39 @@ local config = require('pending.config')
 ---@field version integer
 ---@field next_id integer
 ---@field tasks pending.Task[]
+---@field undo pending.Task[][]
+---@field folded_categories string[]
+
+---@class pending.TaskFields
+---@field description string
+---@field status? string
+---@field category? string
+---@field priority? integer
+---@field due? string
+---@field recur? string
+---@field recur_mode? string
+---@field order? integer
+---@field _extra? table
+
+---@class pending.Store
+---@field path string
+---@field _data pending.Data?
+local Store = {}
+Store.__index = Store
 
 ---@class pending.store
 local M = {}
 
 local SUPPORTED_VERSION = 1
 
----@type pending.Data?
-local _data = nil
-
 ---@return pending.Data
 local function empty_data()
   return {
     version = SUPPORTED_VERSION,
     next_id = 1,
     tasks = {},
+    undo = {},
+    folded_categories = {},
   }
 end
 
@@ -56,6 +76,8 @@ local known_fields = {
   category = true,
   priority = true,
   due = true,
+  recur = true,
+  recur_mode = true,
   entry = true,
   modified = true,
   ['end'] = true,
@@ -81,6 +103,12 @@ local function task_to_table(task)
   if task.due then
     t.due = task.due
   end
+  if task.recur then
+    t.recur = task.recur
+  end
+  if task.recur_mode then
+    t.recur_mode = task.recur_mode
+  end
   if task['end'] then
     t['end'] = task['end']
   end
@@ -105,6 +133,8 @@ local function table_to_task(t)
     category = t.category,
     priority = t.priority or 0,
     due = t.due,
+    recur = t.recur,
+    recur_mode = t.recur_mode,
     entry = t.entry,
     modified = t.modified,
     ['end'] = t['end'],
@@ -123,18 +153,18 @@ local function table_to_task(t)
 end
 
 ---@return pending.Data
-function M.load()
+function Store:load()
-  local path = config.get().data_path
+  local path = self.path
   local f = io.open(path, 'r')
   if not f then
-    _data = empty_data()
+    self._data = empty_data()
-    return _data
+    return self._data
   end
   local content = f:read('*a')
   f:close()
   if content == '' then
-    _data = empty_data()
+    self._data = empty_data()
-    return _data
+    return self._data
   end
   local ok, decoded = pcall(vim.json.decode, content)
   if not ok then
@@ -149,31 +179,52 @@ function M.load()
         .. '. Please update the plugin.'
     )
   end
-  _data = {
+  self._data = {
     version = decoded.version or SUPPORTED_VERSION,
     next_id = decoded.next_id or 1,
     tasks = {},
+    undo = {},
+    folded_categories = decoded.folded_categories or {},
   }
   for _, t in ipairs(decoded.tasks or {}) do
-    table.insert(_data.tasks, table_to_task(t))
+    table.insert(self._data.tasks, table_to_task(t))
   end
-  return _data
+  for _, snapshot in ipairs(decoded.undo or {}) do
+    if type(snapshot) == 'table' then
+      local tasks = {}
+      for _, raw in ipairs(snapshot) do
+        table.insert(tasks, table_to_task(raw))
+      end
+      table.insert(self._data.undo, tasks)
+    end
+  end
+  return self._data
 end
 
-function M.save()
+---@return nil
-  if not _data then
+function Store:save()
+  if not self._data then
     return
   end
-  local path = config.get().data_path
+  local path = self.path
   ensure_dir(path)
   local out = {
-    version = _data.version,
+    version = self._data.version,
-    next_id = _data.next_id,
+    next_id = self._data.next_id,
     tasks = {},
+    undo = {},
+    folded_categories = self._data.folded_categories,
   }
-  for _, task in ipairs(_data.tasks) do
+  for _, task in ipairs(self._data.tasks) do
     table.insert(out.tasks, task_to_table(task))
   end
+  for _, snapshot in ipairs(self._data.undo) do
+    local serialized = {}
+    for _, task in ipairs(snapshot) do
+      table.insert(serialized, task_to_table(task))
+    end
+    table.insert(out.undo, serialized)
+  end
   local encoded = vim.json.encode(out)
   local tmp = path .. '.tmp'
   local f = io.open(tmp, 'w')
@@ -190,22 +241,22 @@ function M.save()
 end
 
 ---@return pending.Data
-function M.data()
+function Store:data()
-  if not _data then
+  if not self._data then
-    M.load()
+    self:load()
   end
-  return _data --[[@as pending.Data]]
+  return self._data --[[@as pending.Data]]
 end
 
 ---@return pending.Task[]
-function M.tasks()
+function Store:tasks()
-  return M.data().tasks
+  return self:data().tasks
 end
 
 ---@return pending.Task[]
-function M.active_tasks()
+function Store:active_tasks()
   local result = {}
-  for _, task in ipairs(M.tasks()) do
+  for _, task in ipairs(self:tasks()) do
     if task.status ~= 'deleted' then
       table.insert(result, task)
     end
@@ -215,8 +266,8 @@ end
 
 ---@param id integer
 ---@return pending.Task?
-function M.get(id)
+function Store:get(id)
-  for _, task in ipairs(M.tasks()) do
+  for _, task in ipairs(self:tasks()) do
     if task.id == id then
       return task
     end
@@ -224,10 +275,10 @@ function M.get(id)
   return nil
 end
 
----@param fields { description: string, status?: string, category?: string, priority?: integer, due?: string, order?: integer, _extra?: table }
+---@param fields pending.TaskFields
 ---@return pending.Task
-function M.add(fields)
+function Store:add(fields)
-  local data = M.data()
+  local data = self:data()
   local now = timestamp()
   local task = {
     id = data.next_id,
@@ -236,6 +287,8 @@ function M.add(fields)
     category = fields.category or config.get().default_category,
     priority = fields.priority or 0,
     due = fields.due,
+    recur = fields.recur,
+    recur_mode = fields.recur_mode,
     entry = now,
     modified = now,
     ['end'] = nil,
@@ -250,15 +303,19 @@ end
 ---@param id integer
 ---@param fields table<string, any>
 ---@return pending.Task?
-function M.update(id, fields)
+function Store:update(id, fields)
-  local task = M.get(id)
+  local task = self:get(id)
   if not task then
     return nil
   end
   local now = timestamp()
   for k, v in pairs(fields) do
     if k ~= 'id' and k ~= 'entry' then
-      task[k] = v
+      if v == vim.NIL then
+        task[k] = nil
+      else
+        task[k] = v
+      end
     end
   end
   task.modified = now
@@ -270,14 +327,14 @@ end
 
 ---@param id integer
 ---@return pending.Task?
-function M.delete(id)
+function Store:delete(id)
-  return M.update(id, { status = 'deleted', ['end'] = timestamp() })
+  return self:update(id, { status = 'deleted', ['end'] = timestamp() })
 end
 
 ---@param id integer
 ---@return integer?
-function M.find_index(id)
+function Store:find_index(id)
-  for i, task in ipairs(M.tasks()) do
+  for i, task in ipairs(self:tasks()) do
     if task.id == id then
       return i
     end
@@ -286,14 +343,15 @@ function M.find_index(id)
 end
 
 ---@param tasks pending.Task[]
-function M.replace_tasks(tasks)
+---@return nil
-  M.data().tasks = tasks
+function Store:replace_tasks(tasks)
+  self:data().tasks = tasks
 end
 
 ---@return pending.Task[]
-function M.snapshot()
+function Store:snapshot()
   local result = {}
-  for _, task in ipairs(M.active_tasks()) do
+  for _, task in ipairs(self:active_tasks()) do
     local copy = {}
     for k, v in pairs(task) do
       if k ~= '_extra' then
@@ -311,13 +369,48 @@ function M.snapshot()
   return result
 end
 
----@param id integer
+---@return pending.Task[][]
-function M.set_next_id(id)
+function Store:undo_stack()
-  M.data().next_id = id
+  return self:data().undo
 end
 
-function M.unload()
+---@param stack pending.Task[][]
-  _data = nil
+---@return nil
+function Store:set_undo_stack(stack)
+  self:data().undo = stack
+end
+
+---@param id integer
+---@return nil
+function Store:set_next_id(id)
+  self:data().next_id = id
+end
+
+---@return string[]
+function Store:get_folded_categories()
+  return self:data().folded_categories
+end
+
+---@param cats string[]
+---@return nil
+function Store:set_folded_categories(cats)
+  self:data().folded_categories = cats
+end
+
+---@return nil
+function Store:unload()
+  self._data = nil
+end
+
+---@param path string
+---@return pending.Store
+function M.new(path)
+  return setmetatable({ path = path, _data = nil }, Store)
+end
+
+---@return string
+function M.resolve_path()
+  return config.get().data_path
 end
 
 return M

lua/pending/sync/gcal.lua

@@ -1,384 +1,61 @@
 local config = require('pending.config')
-local store = require('pending.store')
+local log = require('pending.log')
+local oauth = require('pending.sync.oauth')
+local util = require('pending.sync.util')
 
 local M = {}
 
+M.name = 'gcal'
+
 local BASE_URL = 'https://www.googleapis.com/calendar/v3'
-local TOKEN_URL = 'https://oauth2.googleapis.com/token'
-local AUTH_URL = 'https://accounts.google.com/o/oauth2/v2/auth'
-local SCOPE = 'https://www.googleapis.com/auth/calendar'
 
----@class pending.GcalCredentials
+---@param access_token string
----@field client_id string
+---@return table<string, string>? name_to_id
----@field client_secret string
+---@return string? err
----@field redirect_uris? string[]
+local function get_all_calendars(access_token)
-
+  local data, err = oauth.curl_request(
----@class pending.GcalTokens
+    'GET',
----@field access_token string
+    BASE_URL .. '/users/me/calendarList',
----@field refresh_token string
+    oauth.auth_headers(access_token)
----@field expires_in? integer
----@field obtained_at? integer
-
----@return table<string, any>
-local function gcal_config()
-  local cfg = config.get()
-  return cfg.gcal or {}
-end
-
----@return string
-local function token_path()
-  return vim.fn.stdpath('data') .. '/pending/gcal_tokens.json'
-end
-
----@return string
-local function credentials_path()
-  local gc = gcal_config()
-  return gc.credentials_path or (vim.fn.stdpath('data') .. '/pending/gcal_credentials.json')
-end
-
----@param path string
----@return table?
-local function load_json_file(path)
-  local f = io.open(path, 'r')
-  if not f then
-    return nil
-  end
-  local content = f:read('*a')
-  f:close()
-  if content == '' then
-    return nil
-  end
-  local ok, decoded = pcall(vim.json.decode, content)
-  if not ok then
-    return nil
-  end
-  return decoded
-end
-
----@param path string
----@param data table
----@return boolean
-local function save_json_file(path, data)
-  local dir = vim.fn.fnamemodify(path, ':h')
-  if vim.fn.isdirectory(dir) == 0 then
-    vim.fn.mkdir(dir, 'p')
-  end
-  local f = io.open(path, 'w')
-  if not f then
-    return false
-  end
-  f:write(vim.json.encode(data))
-  f:close()
-  vim.fn.setfperm(path, 'rw-------')
-  return true
-end
-
----@return pending.GcalCredentials?
-local function load_credentials()
-  local creds = load_json_file(credentials_path())
-  if not creds then
-    return nil
-  end
-  if creds.installed then
-    return creds.installed --[[@as pending.GcalCredentials]]
-  end
-  return creds --[[@as pending.GcalCredentials]]
-end
-
----@return pending.GcalTokens?
-local function load_tokens()
-  return load_json_file(token_path()) --[[@as pending.GcalTokens?]]
-end
-
----@param tokens pending.GcalTokens
----@return boolean
-local function save_tokens(tokens)
-  return save_json_file(token_path(), tokens)
-end
-
----@param str string
----@return string
-local function url_encode(str)
-  return (
-    str:gsub('([^%w%-%.%_%~])', function(c)
-      return string.format('%%%02X', string.byte(c))
-    end)
   )
-end
-
----@param method string
----@param url string
----@param headers? string[]
----@param body? string
----@return table? result
----@return string? err
-local function curl_request(method, url, headers, body)
-  local args = { 'curl', '-s', '-X', method }
-  for _, h in ipairs(headers or {}) do
-    table.insert(args, '-H')
-    table.insert(args, h)
-  end
-  if body then
-    table.insert(args, '-d')
-    table.insert(args, body)
-  end
-  table.insert(args, url)
-  local result = vim.system(args, { text = true }):wait()
-  if result.code ~= 0 then
-    return nil, 'curl failed: ' .. (result.stderr or '')
-  end
-  if not result.stdout or result.stdout == '' then
-    return {}, nil
-  end
-  local ok, decoded = pcall(vim.json.decode, result.stdout)
-  if not ok then
-    return nil, 'failed to parse response: ' .. result.stdout
-  end
-  if decoded.error then
-    return nil, 'API error: ' .. (decoded.error.message or vim.json.encode(decoded.error))
-  end
-  return decoded, nil
-end
-
----@param access_token string
----@return string[]
-local function auth_headers(access_token)
-  return {
-    'Authorization: Bearer ' .. access_token,
-    'Content-Type: application/json',
-  }
-end
-
----@param creds pending.GcalCredentials
----@param tokens pending.GcalTokens
----@return pending.GcalTokens?
-local function refresh_access_token(creds, tokens)
-  local body = 'client_id='
-    .. url_encode(creds.client_id)
-    .. '&client_secret='
-    .. url_encode(creds.client_secret)
-    .. '&grant_type=refresh_token'
-    .. '&refresh_token='
-    .. url_encode(tokens.refresh_token)
-  local result = vim
-    .system({
-      'curl',
-      '-s',
-      '-X',
-      'POST',
-      '-H',
-      'Content-Type: application/x-www-form-urlencoded',
-      '-d',
-      body,
-      TOKEN_URL,
-    }, { text = true })
-    :wait()
-  if result.code ~= 0 then
-    return nil
-  end
-  local ok, decoded = pcall(vim.json.decode, result.stdout or '')
-  if not ok or not decoded.access_token then
-    return nil
-  end
-  tokens.access_token = decoded.access_token --[[@as string]]
-  tokens.expires_in = decoded.expires_in --[[@as integer?]]
-  tokens.obtained_at = os.time()
-  save_tokens(tokens)
-  return tokens
-end
-
----@return string?
-local function get_access_token()
-  local creds = load_credentials()
-  if not creds then
-    vim.notify(
-      'pending.nvim: No Google Calendar credentials found at ' .. credentials_path(),
-      vim.log.levels.ERROR
-    )
-    return nil
-  end
-  local tokens = load_tokens()
-  if not tokens or not tokens.refresh_token then
-    M.authorize()
-    tokens = load_tokens()
-    if not tokens then
-      return nil
-    end
-  end
-  local now = os.time()
-  local obtained = tokens.obtained_at or 0
-  local expires = tokens.expires_in or 3600
-  if now - obtained > expires - 60 then
-    tokens = refresh_access_token(creds, tokens)
-    if not tokens then
-      vim.notify('pending.nvim: Failed to refresh access token.', vim.log.levels.ERROR)
-      return nil
-    end
-  end
-  return tokens.access_token
-end
-
-function M.authorize()
-  local creds = load_credentials()
-  if not creds then
-    vim.notify(
-      'pending.nvim: No Google Calendar credentials found at ' .. credentials_path(),
-      vim.log.levels.ERROR
-    )
-    return
-  end
-
-  local port = 18392
-  local verifier_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~'
-  local verifier = {}
-  math.randomseed(os.time())
-  for _ = 1, 64 do
-    local idx = math.random(1, #verifier_chars)
-    table.insert(verifier, verifier_chars:sub(idx, idx))
-  end
-  local code_verifier = table.concat(verifier)
-
-  local sha_pipe = vim
-    .system({
-      'sh',
-      '-c',
-      'printf "%s" "'
-        .. code_verifier
-        .. '" | openssl dgst -sha256 -binary | openssl base64 -A | tr "+/" "-_" | tr -d "="',
-    }, { text = true })
-    :wait()
-  local code_challenge = sha_pipe.stdout or ''
-
-  local auth_url = AUTH_URL
-    .. '?client_id='
-    .. url_encode(creds.client_id)
-    .. '&redirect_uri='
-    .. url_encode('http://127.0.0.1:' .. port)
-    .. '&response_type=code'
-    .. '&scope='
-    .. url_encode(SCOPE)
-    .. '&access_type=offline'
-    .. '&prompt=consent'
-    .. '&code_challenge='
-    .. url_encode(code_challenge)
-    .. '&code_challenge_method=S256'
-
-  vim.ui.open(auth_url)
-  vim.notify('pending.nvim: Opening browser for Google authorization...')
-
-  local server = vim.uv.new_tcp()
-  server:bind('127.0.0.1', port)
-  server:listen(1, function(err)
-    if err then
-      return
-    end
-    local client = vim.uv.new_tcp()
-    server:accept(client)
-    client:read_start(function(read_err, data)
-      if read_err or not data then
-        return
-      end
-      local code = data:match('[?&]code=([^&%s]+)')
-      local response_body = code
-          and '<html><body><h1>Authorization successful</h1><p>You can close this tab.</p></body></html>'
-        or '<html><body><h1>Authorization failed</h1></body></html>'
-      local http_response = 'HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n'
-        .. response_body
-      client:write(http_response, function()
-        client:shutdown(function()
-          client:close()
-        end)
-      end)
-      server:close()
-      if code then
-        vim.schedule(function()
-          M._exchange_code(creds, code, code_verifier, port)
-        end)
-      end
-    end)
-  end)
-end
-
----@param creds pending.GcalCredentials
----@param code string
----@param code_verifier string
----@param port integer
-function M._exchange_code(creds, code, code_verifier, port)
-  local body = 'client_id='
-    .. url_encode(creds.client_id)
-    .. '&client_secret='
-    .. url_encode(creds.client_secret)
-    .. '&code='
-    .. url_encode(code)
-    .. '&code_verifier='
-    .. url_encode(code_verifier)
-    .. '&grant_type=authorization_code'
-    .. '&redirect_uri='
-    .. url_encode('http://127.0.0.1:' .. port)
-
-  local result = vim
-    .system({
-      'curl',
-      '-s',
-      '-X',
-      'POST',
-      '-H',
-      'Content-Type: application/x-www-form-urlencoded',
-      '-d',
-      body,
-      TOKEN_URL,
-    }, { text = true })
-    :wait()
-
-  if result.code ~= 0 then
-    vim.notify('pending.nvim: Token exchange failed.', vim.log.levels.ERROR)
-    return
-  end
-
-  local ok, decoded = pcall(vim.json.decode, result.stdout or '')
-  if not ok or not decoded.access_token then
-    vim.notify('pending.nvim: Invalid token response.', vim.log.levels.ERROR)
-    return
-  end
-
-  decoded.obtained_at = os.time()
-  save_tokens(decoded)
-  vim.notify('pending.nvim: Google Calendar authorized successfully.')
-end
-
----@param access_token string
----@return string? calendar_id
----@return string? err
-local function find_or_create_calendar(access_token)
-  local gc = gcal_config()
-  local cal_name = gc.calendar or 'Pendings'
-
-  local data, err =
-    curl_request('GET', BASE_URL .. '/users/me/calendarList', auth_headers(access_token))
   if err then
     return nil, err
   end
-
+  local result = {}
   for _, item in ipairs(data and data.items or {}) do
-    if item.summary == cal_name then
+    if item.summary then
-      return item.id, nil
+      result[item.summary] = item.id
     end
   end
+  return result, nil
+end
 
-  local body = vim.json.encode({ summary = cal_name })
+---@param access_token string
-  local created, create_err =
+---@param name string
-    curl_request('POST', BASE_URL .. '/calendars', auth_headers(access_token), body)
+---@param existing table<string, string>
-  if create_err then
+---@return string? calendar_id
-    return nil, create_err
+---@return string? err
+local function find_or_create_calendar(access_token, name, existing)
+  if existing[name] then
+    return existing[name], nil
   end
-
+  local body = vim.json.encode({ summary = name })
-  return created and created.id, nil
+  local created, err =
+    oauth.curl_request('POST', BASE_URL .. '/calendars', oauth.auth_headers(access_token), body)
+  if err then
+    return nil, err
+  end
+  local id = created and created.id
+  if id then
+    existing[name] = id
+  end
+  return id, nil
 end
 
 ---@param date_str string
 ---@return string
 local function next_day(date_str)
-  local y, m, d = date_str:match('^(%d%d%d%d)-(%d%d)-(%d%d)$')
+  local y, m, d = date_str:match('^(%d%d%d%d)-(%d%d)-(%d%d)')
   local t = os.time({ year = tonumber(y) or 0, month = tonumber(m) or 0, day = tonumber(d) or 0 })
     + 86400
   return os.date('%Y-%m-%d', t) --[[@as string]]
@@ -399,10 +76,10 @@ local function create_event(access_token, calendar_id, task)
       private = { taskId = tostring(task.id) },
     },
   }
-  local data, err = curl_request(
+  local data, err = oauth.curl_request(
     'POST',
-    BASE_URL .. '/calendars/' .. url_encode(calendar_id) .. '/events',
+    BASE_URL .. '/calendars/' .. oauth.url_encode(calendar_id) .. '/events',
-    auth_headers(access_token),
+    oauth.auth_headers(access_token),
     vim.json.encode(event)
   )
   if err then
@@ -421,11 +98,16 @@ local function update_event(access_token, calendar_id, event_id, task)
     summary = task.description,
     start = { date = task.due },
     ['end'] = { date = next_day(task.due or '') },
+    transparency = 'transparent',
   }
-  local _, err = curl_request(
+  local _, err = oauth.curl_request(
     'PATCH',
-    BASE_URL .. '/calendars/' .. url_encode(calendar_id) .. '/events/' .. url_encode(event_id),
+    BASE_URL
-    auth_headers(access_token),
+      .. '/calendars/'
+      .. oauth.url_encode(calendar_id)
+      .. '/events/'
+      .. oauth.url_encode(event_id),
+    oauth.auth_headers(access_token),
     vim.json.encode(event)
   )
   return err
@@ -436,81 +118,165 @@ end
 ---@param event_id string
 ---@return string? err
 local function delete_event(access_token, calendar_id, event_id)
-  local _, err = curl_request(
+  local _, err = oauth.curl_request(
     'DELETE',
-    BASE_URL .. '/calendars/' .. url_encode(calendar_id) .. '/events/' .. url_encode(event_id),
+    BASE_URL
-    auth_headers(access_token)
+      .. '/calendars/'
+      .. oauth.url_encode(calendar_id)
+      .. '/events/'
+      .. oauth.url_encode(event_id),
+    oauth.auth_headers(access_token)
   )
   return err
 end
 
-function M.sync()
+---@return boolean
-  local access_token = get_access_token()
+local function allow_remote_delete()
-  if not access_token then
+  local cfg = config.get()
-    return
+  local sync = cfg.sync or {}
+  local per = (sync.gcal or {}) --[[@as pending.GcalConfig]]
+  if per.remote_delete ~= nil then
+    return per.remote_delete == true
   end
+  return sync.remote_delete == true
+end
 
-  local calendar_id, err = find_or_create_calendar(access_token)
+---@param task pending.Task
-  if err or not calendar_id then
+---@param extra table
-    vim.notify('pending.nvim: ' .. (err or 'calendar not found'), vim.log.levels.ERROR)
+---@param now_ts string
-    return
+local function unlink_remote(task, extra, now_ts)
+  extra['_gcal_event_id'] = nil
+  extra['_gcal_calendar_id'] = nil
+  if next(extra) == nil then
+    task._extra = nil
+  else
+    task._extra = extra
   end
+  task.modified = now_ts
+end
 
-  local tasks = store.tasks()
+function M.push()
-  local created, updated, deleted = 0, 0, 0
+  oauth.with_token(oauth.google_client, 'gcal', function(access_token)
+    local calendars, cal_err = get_all_calendars(access_token)
+    if cal_err or not calendars then
+      log.error('gcal: ' .. (cal_err or 'failed to fetch calendars'))
+      return
+    end
 
-  for _, task in ipairs(tasks) do
+    local s = require('pending').store()
-    local extra = task._extra or {}
+    local now_ts = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
-    local event_id = extra['_gcal_event_id'] --[[@as string?]]
+    local created, updated, deleted, failed = 0, 0, 0, 0
 
-    local should_delete = event_id ~= nil
+    for _, task in ipairs(s:tasks()) do
-      and (
+      local extra = task._extra or {}
-        task.status == 'done'
+      local event_id = extra['_gcal_event_id'] --[[@as string?]]
-        or task.status == 'deleted'
+      local cal_id = extra['_gcal_calendar_id'] --[[@as string?]]
-        or (task.status == 'pending' and not task.due)
-      )
 
-    if should_delete and event_id then
+      local should_delete = event_id ~= nil
-      local del_err = delete_event(access_token, calendar_id, event_id) --[[@as string]]
+        and cal_id ~= nil
-      if not del_err then
+        and (
-        extra['_gcal_event_id'] = nil
+          task.status == 'done'
-        if next(extra) == nil then
+          or task.status == 'deleted'
-          task._extra = nil
+          or (task.status == 'pending' and not task.due)
-        else
+        )
-          task._extra = extra
+
-        end
+      if should_delete then
-        task.modified = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+        if allow_remote_delete() then
-        deleted = deleted + 1
+          local del_err =
-      end
+            delete_event(access_token, cal_id --[[@as string]], event_id --[[@as string]])
-    elseif task.status == 'pending' and task.due then
+          if del_err then
-      if event_id then
+            log.warn('gcal: failed to delete calendar event — ' .. del_err)
-        local upd_err = update_event(access_token, calendar_id, event_id, task)
+            failed = failed + 1
-        if not upd_err then
+          else
-          updated = updated + 1
+            unlink_remote(task, extra, now_ts)
-        end
+            deleted = deleted + 1
-      else
+          end
-        local new_id, create_err = create_event(access_token, calendar_id, task)
+        else
-        if not create_err and new_id then
+          log.debug(
-          if not task._extra then
+            'gcal: remote delete skipped (remote_delete disabled) — unlinked task #' .. task.id
-            task._extra = {}
+          )
+          unlink_remote(task, extra, now_ts)
+          deleted = deleted + 1
+        end
+      elseif task.status == 'pending' and task.due then
+        local cat = task.category or config.get().default_category
+        if event_id and cal_id then
+          local upd_err = update_event(access_token, cal_id, event_id, task)
+          if upd_err then
+            log.warn('gcal: failed to update calendar event — ' .. upd_err)
+            failed = failed + 1
+          else
+            updated = updated + 1
+          end
+        else
+          local lid, lid_err = find_or_create_calendar(access_token, cat, calendars)
+          if lid_err or not lid then
+            log.warn('gcal: failed to create calendar — ' .. (lid_err or 'unknown'))
+            failed = failed + 1
+          else
+            local new_id, create_err = create_event(access_token, lid, task)
+            if create_err then
+              log.warn('gcal: failed to create calendar event — ' .. create_err)
+              failed = failed + 1
+            elseif new_id then
+              if not task._extra then
+                task._extra = {}
+              end
+              task._extra['_gcal_event_id'] = new_id
+              task._extra['_gcal_calendar_id'] = lid
+              task.modified = now_ts
+              created = created + 1
+            end
           end
-          task._extra['_gcal_event_id'] = new_id
-          task.modified = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
-          created = created + 1
         end
       end
     end
-  end
 
-  store.save()
+    util.finish(s)
-  vim.notify(
+    log.info('gcal: push ' .. util.fmt_counts({
-    string.format(
+      { created, 'added' },
-      'pending.nvim: Synced to Google Calendar (created: %d, updated: %d, deleted: %d)',
+      { updated, 'updated' },
-      created,
+      { deleted, 'removed' },
-      updated,
+      { failed, 'failed' },
-      deleted
+    }))
+  end)
+end
+
+---@param args? string
+---@return nil
+function M.auth(args)
+  if args == 'clear' then
+    oauth.google_client:clear_tokens()
+    log.info('gcal: OAuth tokens cleared — run :Pending auth gcal to re-authenticate.')
+  elseif args == 'reset' then
+    oauth.google_client:_wipe()
+    log.info(
+      'gcal: OAuth tokens and credentials cleared — run :Pending auth gcal to set up from scratch.'
     )
-  )
+  else
+    local creds = oauth.google_client:resolve_credentials()
+    if creds.client_id == oauth.BUNDLED_CLIENT_ID then
+      oauth.google_client:setup()
+    else
+      oauth.google_client:auth()
+    end
+  end
+end
+
+---@return string[]
+function M.auth_complete()
+  return { 'clear', 'reset' }
+end
+
+---@return nil
+function M.health()
+  oauth.health(M.name)
+  local tokens = oauth.google_client:load_tokens()
+  if tokens and tokens.refresh_token then
+    vim.health.ok('gcal tokens found')
+  else
+    vim.health.info('no gcal tokens — run :Pending auth gcal')
+  end
 end
 
 return M

lua/pending/sync/gtasks.lua

@@ -0,0 +1,544 @@
+local config = require('pending.config')
+local log = require('pending.log')
+local oauth = require('pending.sync.oauth')
+local util = require('pending.sync.util')
+
+local M = {}
+
+M.name = 'gtasks'
+
+local BASE_URL = 'https://tasks.googleapis.com/tasks/v1'
+
+---@param access_token string
+---@return table<string, string>? name_to_id
+---@return string? err
+local function get_all_tasklists(access_token)
+  local data, err =
+    oauth.curl_request('GET', BASE_URL .. '/users/@me/lists', oauth.auth_headers(access_token))
+  if err then
+    return nil, err
+  end
+  local result = {}
+  for _, item in ipairs(data and data.items or {}) do
+    result[item.title] = item.id
+  end
+  return result, nil
+end
+
+---@param access_token string
+---@param name string
+---@param existing table<string, string>
+---@return string? list_id
+---@return string? err
+local function find_or_create_tasklist(access_token, name, existing)
+  if existing[name] then
+    return existing[name], nil
+  end
+  local body = vim.json.encode({ title = name })
+  local created, err = oauth.curl_request(
+    'POST',
+    BASE_URL .. '/users/@me/lists',
+    oauth.auth_headers(access_token),
+    body
+  )
+  if err then
+    return nil, err
+  end
+  local id = created and created.id
+  if id then
+    existing[name] = id
+  end
+  return id, nil
+end
+
+---@param access_token string
+---@param list_id string
+---@return table[]? items
+---@return string? err
+local function list_gtasks(access_token, list_id)
+  local url = BASE_URL
+    .. '/lists/'
+    .. oauth.url_encode(list_id)
+    .. '/tasks?showCompleted=true&showHidden=true'
+  local data, err = oauth.curl_request('GET', url, oauth.auth_headers(access_token))
+  if err then
+    return nil, err
+  end
+  return data and data.items or {}, nil
+end
+
+---@param access_token string
+---@param list_id string
+---@param body table
+---@return string? task_id
+---@return string? err
+local function create_gtask(access_token, list_id, body)
+  local data, err = oauth.curl_request(
+    'POST',
+    BASE_URL .. '/lists/' .. oauth.url_encode(list_id) .. '/tasks',
+    oauth.auth_headers(access_token),
+    vim.json.encode(body)
+  )
+  if err then
+    return nil, err
+  end
+  return data and data.id, nil
+end
+
+---@param access_token string
+---@param list_id string
+---@param task_id string
+---@param body table
+---@return string? err
+local function update_gtask(access_token, list_id, task_id, body)
+  local _, err = oauth.curl_request(
+    'PATCH',
+    BASE_URL .. '/lists/' .. oauth.url_encode(list_id) .. '/tasks/' .. oauth.url_encode(task_id),
+    oauth.auth_headers(access_token),
+    vim.json.encode(body)
+  )
+  return err
+end
+
+---@param access_token string
+---@param list_id string
+---@param task_id string
+---@return string? err
+local function delete_gtask(access_token, list_id, task_id)
+  local _, err = oauth.curl_request(
+    'DELETE',
+    BASE_URL .. '/lists/' .. oauth.url_encode(list_id) .. '/tasks/' .. oauth.url_encode(task_id),
+    oauth.auth_headers(access_token)
+  )
+  return err
+end
+
+---@param due string YYYY-MM-DD or YYYY-MM-DDThh:mm
+---@return string RFC 3339
+local function due_to_rfc3339(due)
+  local date = due:match('^(%d%d%d%d%-%d%d%-%d%d)')
+  return (date or due) .. 'T00:00:00.000Z'
+end
+
+---@param rfc string RFC 3339 from GTasks
+---@return string YYYY-MM-DD
+local function rfc3339_to_date(rfc)
+  return rfc:match('^(%d%d%d%d%-%d%d%-%d%d)') or rfc
+end
+
+---@param task pending.Task
+---@return string?
+local function build_notes(task)
+  local parts = {}
+  if task.priority and task.priority > 0 then
+    table.insert(parts, 'pri:' .. task.priority)
+  end
+  if task.recur then
+    local spec = task.recur
+    if task.recur_mode == 'completion' then
+      spec = '!' .. spec
+    end
+    table.insert(parts, 'rec:' .. spec)
+  end
+  if #parts == 0 then
+    return nil
+  end
+  return table.concat(parts, ' ')
+end
+
+---@param notes string?
+---@return integer priority
+---@return string? recur
+---@return string? recur_mode
+local function parse_notes(notes)
+  if not notes then
+    return 0, nil, nil
+  end
+  local priority = 0
+  local recur = nil
+  local recur_mode = nil
+  local pri = notes:match('pri:(%d+)')
+  if pri then
+    priority = tonumber(pri) or 0
+  end
+  local rec = notes:match('rec:(!?[%w]+)')
+  if rec then
+    if rec:sub(1, 1) == '!' then
+      recur = rec:sub(2)
+      recur_mode = 'completion'
+    else
+      recur = rec
+    end
+  end
+  return priority, recur, recur_mode
+end
+
+---@return boolean
+local function allow_remote_delete()
+  local cfg = config.get()
+  local sync = cfg.sync or {}
+  local per = (sync.gtasks or {}) --[[@as pending.GtasksConfig]]
+  if per.remote_delete ~= nil then
+    return per.remote_delete == true
+  end
+  return sync.remote_delete == true
+end
+
+---@param task pending.Task
+---@param now_ts string
+local function unlink_remote(task, now_ts)
+  task._extra['_gtasks_task_id'] = nil
+  task._extra['_gtasks_list_id'] = nil
+  task._extra['_gtasks_synced_at'] = nil
+  if next(task._extra) == nil then
+    task._extra = nil
+  end
+  task.modified = now_ts
+end
+
+---@param task pending.Task
+---@return table
+local function task_to_gtask(task)
+  local body = {
+    title = task.description,
+    status = task.status == 'done' and 'completed' or 'needsAction',
+  }
+  if task.due then
+    body.due = due_to_rfc3339(task.due)
+  end
+  local notes = build_notes(task)
+  if notes then
+    body.notes = notes
+  end
+  return body
+end
+
+---@param gtask table
+---@param category string
+---@return table fields for store:add / store:update
+local function gtask_to_fields(gtask, category)
+  local priority, recur, recur_mode = parse_notes(gtask.notes)
+  local fields = {
+    description = gtask.title or '',
+    category = category,
+    status = gtask.status == 'completed' and 'done' or 'pending',
+    priority = priority,
+    recur = recur,
+    recur_mode = recur_mode,
+  }
+  if gtask.due then
+    fields.due = rfc3339_to_date(gtask.due)
+  end
+  return fields
+end
+
+---@param s pending.Store
+---@return table<string, pending.Task>
+local function build_id_index(s)
+  ---@type table<string, pending.Task>
+  local index = {}
+  for _, task in ipairs(s:tasks()) do
+    local extra = task._extra or {}
+    local gtid = extra['_gtasks_task_id'] --[[@as string?]]
+    if gtid then
+      index[gtid] = task
+    end
+  end
+  return index
+end
+
+---@param access_token string
+---@param tasklists table<string, string>
+---@param s pending.Store
+---@param now_ts string
+---@param by_gtasks_id table<string, pending.Task>
+---@return integer created
+---@return integer updated
+---@return integer deleted
+---@return integer failed
+local function push_pass(access_token, tasklists, s, now_ts, by_gtasks_id)
+  local created, updated, deleted, failed = 0, 0, 0, 0
+  for _, task in ipairs(s:tasks()) do
+    local extra = task._extra or {}
+    local gtid = extra['_gtasks_task_id'] --[[@as string?]]
+    local list_id = extra['_gtasks_list_id'] --[[@as string?]]
+
+    if task.status == 'deleted' and gtid and list_id then
+      if allow_remote_delete() then
+        local err = delete_gtask(access_token, list_id, gtid)
+        if err then
+          log.warn('gtasks: failed to delete remote task — ' .. err)
+          failed = failed + 1
+        else
+          unlink_remote(task, now_ts)
+          deleted = deleted + 1
+        end
+      else
+        log.debug(
+          'gtasks: remote delete skipped (remote_delete disabled) — unlinked task #' .. task.id
+        )
+        unlink_remote(task, now_ts)
+        deleted = deleted + 1
+      end
+    elseif task.status ~= 'deleted' then
+      if gtid and list_id then
+        local synced_at = extra['_gtasks_synced_at'] --[[@as string?]]
+        if not synced_at or task.modified > synced_at then
+          local err = update_gtask(access_token, list_id, gtid, task_to_gtask(task))
+          if err then
+            log.warn('gtasks: failed to update remote task — ' .. err)
+            failed = failed + 1
+          else
+            task._extra = task._extra or {}
+            task._extra['_gtasks_synced_at'] = now_ts
+            updated = updated + 1
+          end
+        end
+      elseif task.status == 'pending' then
+        local cat = task.category or config.get().default_category
+        local lid, err = find_or_create_tasklist(access_token, cat, tasklists)
+        if not err and lid then
+          local new_id, create_err = create_gtask(access_token, lid, task_to_gtask(task))
+          if create_err then
+            log.warn('gtasks: failed to create remote task — ' .. create_err)
+            failed = failed + 1
+          elseif new_id then
+            if not task._extra then
+              task._extra = {}
+            end
+            task._extra['_gtasks_task_id'] = new_id
+            task._extra['_gtasks_list_id'] = lid
+            task._extra['_gtasks_synced_at'] = now_ts
+            task.modified = now_ts
+            by_gtasks_id[new_id] = task
+            created = created + 1
+          end
+        end
+      end
+    end
+  end
+  return created, updated, deleted, failed
+end
+
+---@param access_token string
+---@param tasklists table<string, string>
+---@param s pending.Store
+---@param now_ts string
+---@param by_gtasks_id table<string, pending.Task>
+---@return integer created
+---@return integer updated
+---@return integer failed
+---@return table<string, true> seen_remote_ids
+---@return table<string, true> fetched_list_ids
+local function pull_pass(access_token, tasklists, s, now_ts, by_gtasks_id)
+  local created, updated, failed = 0, 0, 0
+  ---@type table<string, true>
+  local seen_remote_ids = {}
+  ---@type table<string, true>
+  local fetched_list_ids = {}
+  for list_name, list_id in pairs(tasklists) do
+    local items, err = list_gtasks(access_token, list_id)
+    if err then
+      log.warn('gtasks: failed to fetch task list "' .. list_name .. '" — ' .. err)
+      failed = failed + 1
+    else
+      fetched_list_ids[list_id] = true
+      for _, gtask in ipairs(items or {}) do
+        seen_remote_ids[gtask.id] = true
+        local local_task = by_gtasks_id[gtask.id]
+        if local_task then
+          local gtask_updated = gtask.updated or ''
+          local local_modified = local_task.modified or ''
+          if gtask_updated > local_modified then
+            local fields = gtask_to_fields(gtask, list_name)
+            for k, v in pairs(fields) do
+              local_task[k] = v
+            end
+            local_task._extra = local_task._extra or {}
+            local_task._extra['_gtasks_synced_at'] = now_ts
+            local_task.modified = now_ts
+            updated = updated + 1
+          end
+        else
+          local fields = gtask_to_fields(gtask, list_name)
+          fields._extra = {
+            _gtasks_task_id = gtask.id,
+            _gtasks_list_id = list_id,
+            _gtasks_synced_at = now_ts,
+          }
+          local new_task = s:add(fields)
+          by_gtasks_id[gtask.id] = new_task
+          created = created + 1
+        end
+      end
+    end
+  end
+  return created, updated, failed, seen_remote_ids, fetched_list_ids
+end
+
+---@param s pending.Store
+---@param seen_remote_ids table<string, true>
+---@param fetched_list_ids table<string, true>
+---@param now_ts string
+---@return integer unlinked
+local function detect_remote_deletions(s, seen_remote_ids, fetched_list_ids, now_ts)
+  local unlinked = 0
+  for _, task in ipairs(s:tasks()) do
+    local extra = task._extra or {}
+    local gtid = extra['_gtasks_task_id']
+    local list_id = extra['_gtasks_list_id']
+    if
+      task.status ~= 'deleted'
+      and gtid
+      and list_id
+      and fetched_list_ids[list_id]
+      and not seen_remote_ids[gtid]
+    then
+      task._extra['_gtasks_task_id'] = nil
+      task._extra['_gtasks_list_id'] = nil
+      task._extra['_gtasks_synced_at'] = nil
+      if next(task._extra) == nil then
+        task._extra = nil
+      end
+      task.modified = now_ts
+      unlinked = unlinked + 1
+    end
+  end
+  return unlinked
+end
+
+---@param access_token string
+---@return table<string, string>? tasklists
+---@return pending.Store? s
+---@return string? now_ts
+local function sync_setup(access_token)
+  local tasklists, tl_err = get_all_tasklists(access_token)
+  if tl_err or not tasklists then
+    log.error('gtasks: ' .. (tl_err or 'failed to fetch task lists'))
+    return nil, nil, nil
+  end
+  local s = require('pending').store()
+  local now_ts = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+  return tasklists, s, now_ts
+end
+
+function M.push()
+  oauth.with_token(oauth.google_client, 'gtasks', function(access_token)
+    local tasklists, s, now_ts = sync_setup(access_token)
+    if not tasklists then
+      return
+    end
+    ---@cast s pending.Store
+    ---@cast now_ts string
+    local by_gtasks_id = build_id_index(s)
+    local created, updated, deleted, failed =
+      push_pass(access_token, tasklists, s, now_ts, by_gtasks_id)
+    util.finish(s)
+    log.info('gtasks: push ' .. util.fmt_counts({
+      { created, 'added' },
+      { updated, 'updated' },
+      { deleted, 'deleted' },
+      { failed, 'failed' },
+    }))
+  end)
+end
+
+function M.pull()
+  oauth.with_token(oauth.google_client, 'gtasks', function(access_token)
+    local tasklists, s, now_ts = sync_setup(access_token)
+    if not tasklists then
+      return
+    end
+    ---@cast s pending.Store
+    ---@cast now_ts string
+    local by_gtasks_id = build_id_index(s)
+    local created, updated, failed, seen_remote_ids, fetched_list_ids =
+      pull_pass(access_token, tasklists, s, now_ts, by_gtasks_id)
+    local unlinked = detect_remote_deletions(s, seen_remote_ids, fetched_list_ids, now_ts)
+    util.finish(s)
+    log.info('gtasks: pull ' .. util.fmt_counts({
+      { created, 'added' },
+      { updated, 'updated' },
+      { unlinked, 'unlinked' },
+      { failed, 'failed' },
+    }))
+  end)
+end
+
+function M.sync()
+  oauth.with_token(oauth.google_client, 'gtasks', function(access_token)
+    local tasklists, s, now_ts = sync_setup(access_token)
+    if not tasklists then
+      return
+    end
+    ---@cast s pending.Store
+    ---@cast now_ts string
+    local by_gtasks_id = build_id_index(s)
+    local pushed_create, pushed_update, pushed_delete, pushed_failed =
+      push_pass(access_token, tasklists, s, now_ts, by_gtasks_id)
+    local pulled_create, pulled_update, pulled_failed, seen_remote_ids, fetched_list_ids =
+      pull_pass(access_token, tasklists, s, now_ts, by_gtasks_id)
+    local unlinked = detect_remote_deletions(s, seen_remote_ids, fetched_list_ids, now_ts)
+    util.finish(s)
+    log.info('gtasks: sync push ' .. util.fmt_counts({
+      { pushed_create, 'added' },
+      { pushed_update, 'updated' },
+      { pushed_delete, 'deleted' },
+      { pushed_failed, 'failed' },
+    }) .. ' | pull ' .. util.fmt_counts({
+      { pulled_create, 'added' },
+      { pulled_update, 'updated' },
+      { unlinked, 'unlinked' },
+      { pulled_failed, 'failed' },
+    }))
+  end)
+end
+
+M._due_to_rfc3339 = due_to_rfc3339
+M._rfc3339_to_date = rfc3339_to_date
+M._build_notes = build_notes
+M._parse_notes = parse_notes
+M._task_to_gtask = task_to_gtask
+M._gtask_to_fields = gtask_to_fields
+M._push_pass = push_pass
+M._pull_pass = pull_pass
+M._detect_remote_deletions = detect_remote_deletions
+
+---@param args? string
+---@return nil
+function M.auth(args)
+  if args == 'clear' then
+    oauth.google_client:clear_tokens()
+    log.info('gtasks: OAuth tokens cleared — run :Pending auth gtasks to re-authenticate.')
+  elseif args == 'reset' then
+    oauth.google_client:_wipe()
+    log.info(
+      'gtasks: OAuth tokens and credentials cleared — run :Pending auth gtasks to set up from scratch.'
+    )
+  else
+    local creds = oauth.google_client:resolve_credentials()
+    if creds.client_id == oauth.BUNDLED_CLIENT_ID then
+      oauth.google_client:setup()
+    else
+      oauth.google_client:auth()
+    end
+  end
+end
+
+---@return string[]
+function M.auth_complete()
+  return { 'clear', 'reset' }
+end
+
+---@return nil
+function M.health()
+  oauth.health(M.name)
+  local tokens = oauth.google_client:load_tokens()
+  if tokens and tokens.refresh_token then
+    vim.health.ok('gtasks tokens found')
+  else
+    vim.health.info('no gtasks tokens — run :Pending auth gtasks')
+  end
+end
+
+return M

lua/pending/sync/oauth.lua

@@ -0,0 +1,584 @@
+local config = require('pending.config')
+local log = require('pending.log')
+
+local TOKEN_URL = 'https://oauth2.googleapis.com/token'
+local AUTH_URL = 'https://accounts.google.com/o/oauth2/v2/auth'
+
+local BUNDLED_CLIENT_ID = 'PLACEHOLDER'
+local BUNDLED_CLIENT_SECRET = 'PLACEHOLDER'
+
+---@class pending.OAuthCredentials
+---@field client_id string
+---@field client_secret string
+
+---@class pending.OAuthTokens
+---@field access_token string
+---@field refresh_token string
+---@field expires_in? integer
+---@field obtained_at? integer
+
+---@class pending.OAuthClientOpts
+---@field name string
+---@field scope string
+---@field port integer
+---@field config_key string
+
+---@class pending.OAuthClient : pending.OAuthClientOpts
+local OAuthClient = {}
+OAuthClient.__index = OAuthClient
+
+local util = require('pending.sync.util')
+
+local _active_close = nil
+
+---@class pending.oauth
+local M = {}
+
+M.system = util.system
+M.async = util.async
+
+---@param client pending.OAuthClient
+---@param name string
+---@param callback fun(access_token: string): nil
+function M.with_token(client, name, callback)
+  util.async(function()
+    util.with_guard(name, function()
+      local token = client:get_access_token()
+      if not token then
+        local creds = client:resolve_credentials()
+        if creds.client_id == BUNDLED_CLIENT_ID then
+          log.warn(name .. ': No credentials configured — run :Pending auth ' .. name)
+          return
+        end
+        log.info(name .. ': Not authenticated — starting auth flow...')
+        local co = coroutine.running()
+        client:auth(function(ok)
+          vim.schedule(function()
+            coroutine.resume(co, ok)
+          end)
+        end)
+        local auth_ok = coroutine.yield()
+        if not auth_ok then
+          log.error(name .. ': Authentication failed.')
+          return
+        end
+        token = client:get_access_token()
+        if not token then
+          log.error(name .. ': Still not authenticated after auth flow.')
+          return
+        end
+      end
+      callback(token)
+    end)
+  end)
+end
+
+---@param str string
+---@return string
+function M.url_encode(str)
+  return (
+    str:gsub('([^%w%-%.%_%~])', function(c)
+      return string.format('%%%02X', string.byte(c))
+    end)
+  )
+end
+
+---@param path string
+---@return table?
+function M.load_json_file(path)
+  local f = io.open(path, 'r')
+  if not f then
+    return nil
+  end
+  local content = f:read('*a')
+  f:close()
+  if content == '' then
+    return nil
+  end
+  local ok, decoded = pcall(vim.json.decode, content)
+  if not ok then
+    return nil
+  end
+  return decoded
+end
+
+---@param path string
+---@param data table
+---@return boolean
+function M.save_json_file(path, data)
+  local dir = vim.fn.fnamemodify(path, ':h')
+  if vim.fn.isdirectory(dir) == 0 then
+    vim.fn.mkdir(dir, 'p')
+  end
+  local f = io.open(path, 'w')
+  if not f then
+    return false
+  end
+  f:write(vim.json.encode(data))
+  f:close()
+  vim.fn.setfperm(path, 'rw-------')
+  return true
+end
+
+---@param method string
+---@param url string
+---@param headers? string[]
+---@param body? string
+---@return table? result
+---@return string? err
+function M.curl_request(method, url, headers, body)
+  local args = { 'curl', '-s', '-X', method }
+  for _, h in ipairs(headers or {}) do
+    table.insert(args, '-H')
+    table.insert(args, h)
+  end
+  if body then
+    table.insert(args, '-d')
+    table.insert(args, body)
+  end
+  table.insert(args, url)
+  local result = M.system(args, { text = true })
+  if result.code ~= 0 then
+    return nil, 'curl failed: ' .. (result.stderr or '')
+  end
+  if not result.stdout or result.stdout == '' then
+    return {}, nil
+  end
+  local ok, decoded = pcall(vim.json.decode, result.stdout)
+  if not ok then
+    return nil, 'failed to parse response: ' .. result.stdout
+  end
+  if decoded.error then
+    return nil, 'API error: ' .. (decoded.error.message or vim.json.encode(decoded.error))
+  end
+  return decoded, nil
+end
+
+---@param access_token string
+---@return string[]
+function M.auth_headers(access_token)
+  return {
+    'Authorization: Bearer ' .. access_token,
+    'Content-Type: application/json',
+  }
+end
+
+---@param backend_name string
+---@return nil
+function M.health(backend_name)
+  if vim.fn.executable('curl') == 1 then
+    vim.health.ok('curl found (required for ' .. backend_name .. ' sync)')
+  else
+    vim.health.warn('curl not found (needed for ' .. backend_name .. ' sync)')
+  end
+end
+
+---@return string
+function OAuthClient:token_path()
+  return vim.fn.stdpath('data') .. '/pending/' .. self.name .. '_tokens.json'
+end
+
+---@return pending.OAuthCredentials
+function OAuthClient:resolve_credentials()
+  local cfg = config.get()
+  local backend_cfg = (cfg.sync and cfg.sync[self.config_key]) or {}
+
+  if backend_cfg.client_id and backend_cfg.client_secret then
+    return {
+      client_id = backend_cfg.client_id,
+      client_secret = backend_cfg.client_secret,
+    }
+  end
+
+  local data_dir = vim.fn.stdpath('data') .. '/pending/'
+  local cred_paths = {}
+  if backend_cfg.credentials_path then
+    table.insert(cred_paths, backend_cfg.credentials_path)
+  end
+  table.insert(cred_paths, data_dir .. self.name .. '_credentials.json')
+  table.insert(cred_paths, data_dir .. 'google_credentials.json')
+  for _, cred_path in ipairs(cred_paths) do
+    if cred_path then
+      local creds = M.load_json_file(cred_path)
+      if creds then
+        if creds.installed then
+          creds = creds.installed
+        end
+        if creds.client_id and creds.client_secret then
+          return creds --[[@as pending.OAuthCredentials]]
+        end
+      end
+    end
+  end
+  return {
+    client_id = BUNDLED_CLIENT_ID,
+    client_secret = BUNDLED_CLIENT_SECRET,
+  }
+end
+
+---@return pending.OAuthTokens?
+function OAuthClient:load_tokens()
+  return M.load_json_file(self:token_path()) --[[@as pending.OAuthTokens?]]
+end
+
+---@param tokens pending.OAuthTokens
+---@return boolean
+function OAuthClient:save_tokens(tokens)
+  return M.save_json_file(self:token_path(), tokens)
+end
+
+---@param creds pending.OAuthCredentials
+---@param tokens pending.OAuthTokens
+---@return pending.OAuthTokens?
+function OAuthClient:refresh_access_token(creds, tokens)
+  local body = 'client_id='
+    .. M.url_encode(creds.client_id)
+    .. '&client_secret='
+    .. M.url_encode(creds.client_secret)
+    .. '&grant_type=refresh_token'
+    .. '&refresh_token='
+    .. M.url_encode(tokens.refresh_token)
+  local result = M.system({
+    'curl',
+    '-s',
+    '-X',
+    'POST',
+    '-H',
+    'Content-Type: application/x-www-form-urlencoded',
+    '-d',
+    body,
+    TOKEN_URL,
+  }, { text = true })
+  if result.code ~= 0 then
+    return nil
+  end
+  local ok, decoded = pcall(vim.json.decode, result.stdout or '')
+  if not ok or not decoded.access_token then
+    return nil
+  end
+  tokens.access_token = decoded.access_token --[[@as string]]
+  tokens.expires_in = decoded.expires_in --[[@as integer?]]
+  tokens.obtained_at = os.time()
+  self:save_tokens(tokens)
+  return tokens
+end
+
+---@return string?
+function OAuthClient:get_access_token()
+  local creds = self:resolve_credentials()
+  local tokens = self:load_tokens()
+  if not tokens or not tokens.refresh_token then
+    return nil
+  end
+  local now = os.time()
+  local obtained = tokens.obtained_at or 0
+  local expires = tokens.expires_in or 3600
+  if now - obtained > expires - 60 then
+    tokens = self:refresh_access_token(creds, tokens)
+    if not tokens then
+      log.error(self.name .. ': Token refresh failed — re-authenticating...')
+      return nil
+    end
+  end
+  return tokens.access_token
+end
+
+---@return nil
+function OAuthClient:setup()
+  local choice = vim.fn.inputlist({
+    self.name .. ' setup:',
+    '1. Enter client ID and secret',
+    '2. Load from JSON file path',
+  })
+  vim.cmd.redraw()
+
+  local id, secret
+
+  if choice == 1 then
+    while true do
+      id = vim.trim(vim.fn.input(self.name .. ' client ID: '))
+      if id == '' then
+        return
+      end
+      if id:match('^%d+%-[%w_]+%.apps%.googleusercontent%.com$') then
+        break
+      end
+      vim.cmd.redraw()
+      vim.api.nvim_echo({
+        {
+          'invalid client ID — expected <numbers>-<hash>.apps.googleusercontent.com',
+          'ErrorMsg',
+        },
+      }, false, {})
+    end
+
+    while true do
+      secret = vim.trim(vim.fn.inputsecret(self.name .. ' client secret: '))
+      if secret == '' then
+        return
+      end
+      if secret:match('^GOCSPX%-') then
+        break
+      end
+      vim.cmd.redraw()
+      vim.api.nvim_echo(
+        { { 'invalid client secret — expected GOCSPX-...', 'ErrorMsg' } },
+        false,
+        {}
+      )
+    end
+  elseif choice == 2 then
+    local fpath
+    while true do
+      fpath = vim.trim(vim.fn.input(self.name .. ' credentials file: ', '', 'file'))
+      if fpath == '' then
+        return
+      end
+      fpath = vim.fn.expand(fpath)
+      local creds = M.load_json_file(fpath)
+      if creds then
+        if creds.installed then
+          creds = creds.installed
+        end
+        if creds.client_id and creds.client_secret then
+          id = creds.client_id
+          secret = creds.client_secret
+          break
+        end
+      end
+      vim.cmd.redraw()
+      vim.api.nvim_echo(
+        { { 'could not read client_id/client_secret from ' .. fpath, 'ErrorMsg' } },
+        false,
+        {}
+      )
+    end
+  else
+    return
+  end
+
+  vim.schedule(function()
+    local path = vim.fn.stdpath('data') .. '/pending/google_credentials.json'
+    local ok = M.save_json_file(path, { client_id = id, client_secret = secret })
+    if not ok then
+      log.error(self.name .. ': Failed to save credentials.')
+      return
+    end
+    log.info(self.name .. ': Credentials saved, starting authorization...')
+    self:auth()
+  end)
+end
+
+---@param on_complete? fun(ok: boolean): nil
+---@return nil
+function OAuthClient:auth(on_complete)
+  if _active_close then
+    _active_close()
+    _active_close = nil
+  end
+
+  local creds = self:resolve_credentials()
+  if creds.client_id == BUNDLED_CLIENT_ID then
+    log.error(self.name .. ': No credentials configured — run :Pending auth.')
+    if on_complete then
+      on_complete(false)
+    end
+    return
+  end
+  local port = self.port
+
+  local verifier_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~'
+  local verifier = {}
+  math.randomseed(vim.uv.hrtime())
+  for _ = 1, 64 do
+    local idx = math.random(1, #verifier_chars)
+    table.insert(verifier, verifier_chars:sub(idx, idx))
+  end
+  local code_verifier = table.concat(verifier)
+
+  local hex = vim.fn.sha256(code_verifier)
+  local binary = hex:gsub('..', function(h)
+    return string.char(tonumber(h, 16))
+  end)
+  local code_challenge = vim.base64.encode(binary):gsub('+', '-'):gsub('/', '_'):gsub('=', '')
+
+  local auth_url = AUTH_URL
+    .. '?client_id='
+    .. M.url_encode(creds.client_id)
+    .. '&redirect_uri='
+    .. M.url_encode('http://127.0.0.1:' .. port)
+    .. '&response_type=code'
+    .. '&scope='
+    .. M.url_encode(self.scope)
+    .. '&access_type=offline'
+    .. '&prompt=select_account%20consent'
+    .. '&code_challenge='
+    .. M.url_encode(code_challenge)
+    .. '&code_challenge_method=S256'
+
+  local server = vim.uv.new_tcp()
+  local server_closed = false
+  local function close_server()
+    if server_closed then
+      return
+    end
+    server_closed = true
+    if _active_close == close_server then
+      _active_close = nil
+    end
+    server:close()
+  end
+  _active_close = close_server
+
+  local bind_ok, bind_err = pcall(server.bind, server, '127.0.0.1', port)
+  if not bind_ok or bind_err == nil then
+    close_server()
+    log.error(self.name .. ': Port ' .. port .. ' already in use — try again in a moment.')
+    if on_complete then
+      on_complete(false)
+    end
+    return
+  end
+
+  server:listen(1, function(err)
+    if err then
+      return
+    end
+    local conn = vim.uv.new_tcp()
+    server:accept(conn)
+    conn:read_start(function(read_err, data)
+      if read_err or not data then
+        conn:close()
+        close_server()
+        return
+      end
+      local code = data:match('[?&]code=([^&%s]+)')
+      local response_body = code
+          and '<html><body><h1>Authorization successful</h1><p>You can close this tab.</p></body></html>'
+        or '<html><body><h1>Authorization failed</h1></body></html>'
+      local http_response = 'HTTP/1.1 200 OK\r\nContent-Type: text/html\r\nConnection: close\r\n\r\n'
+        .. response_body
+      conn:write(http_response, function()
+        conn:shutdown(function()
+          conn:close()
+        end)
+      end)
+      close_server()
+      if code then
+        vim.schedule(function()
+          self:_exchange_code(creds, code, code_verifier, port, on_complete)
+        end)
+      end
+    end)
+  end)
+
+  vim.ui.open(auth_url)
+  log.info(self.name .. ': Opening browser for authorization...')
+
+  vim.defer_fn(function()
+    if not server_closed then
+      close_server()
+      log.warn(self.name .. ': OAuth callback timed out (120s).')
+      if on_complete then
+        on_complete(false)
+      end
+    end
+  end, 120000)
+end
+
+---@param creds pending.OAuthCredentials
+---@param code string
+---@param code_verifier string
+---@param port integer
+---@param on_complete? fun(ok: boolean): nil
+---@return nil
+function OAuthClient:_exchange_code(creds, code, code_verifier, port, on_complete)
+  local body = 'client_id='
+    .. M.url_encode(creds.client_id)
+    .. '&client_secret='
+    .. M.url_encode(creds.client_secret)
+    .. '&code='
+    .. M.url_encode(code)
+    .. '&code_verifier='
+    .. M.url_encode(code_verifier)
+    .. '&grant_type=authorization_code'
+    .. '&redirect_uri='
+    .. M.url_encode('http://127.0.0.1:' .. port)
+
+  local result = M.system({
+    'curl',
+    '-s',
+    '-X',
+    'POST',
+    '-H',
+    'Content-Type: application/x-www-form-urlencoded',
+    '-d',
+    body,
+    TOKEN_URL,
+  }, { text = true })
+
+  if result.code ~= 0 then
+    self:clear_tokens()
+    log.error(self.name .. ': Token exchange failed.')
+    if on_complete then
+      on_complete(false)
+    end
+    return
+  end
+
+  local ok, decoded = pcall(vim.json.decode, result.stdout or '')
+  if not ok or not decoded.access_token then
+    self:clear_tokens()
+    log.error(self.name .. ': Invalid token response.')
+    if on_complete then
+      on_complete(false)
+    end
+    return
+  end
+
+  decoded.obtained_at = os.time()
+  self:save_tokens(decoded)
+  log.info(self.name .. ': Authorized successfully.')
+  if on_complete then
+    on_complete(true)
+  end
+end
+
+---@return nil
+function OAuthClient:_wipe()
+  os.remove(self:token_path())
+  os.remove(vim.fn.stdpath('data') .. '/pending/google_credentials.json')
+end
+
+---@return nil
+function OAuthClient:clear_tokens()
+  if _active_close then
+    _active_close()
+    _active_close = nil
+  end
+  os.remove(self:token_path())
+end
+
+---@param opts pending.OAuthClientOpts
+---@return pending.OAuthClient
+function M.new(opts)
+  return setmetatable({
+    name = opts.name,
+    scope = opts.scope,
+    port = opts.port,
+    config_key = opts.config_key,
+  }, OAuthClient)
+end
+
+M._BUNDLED_CLIENT_ID = BUNDLED_CLIENT_ID
+M._BUNDLED_CLIENT_SECRET = BUNDLED_CLIENT_SECRET
+M.BUNDLED_CLIENT_ID = BUNDLED_CLIENT_ID
+
+M.google_client = M.new({
+  name = 'Google',
+  scope = 'https://www.googleapis.com/auth/tasks' .. ' https://www.googleapis.com/auth/calendar',
+  port = 18392,
+  config_key = 'google',
+})
+
+return M

lua/pending/sync/s3.lua

@@ -0,0 +1,509 @@
+local log = require('pending.log')
+local util = require('pending.sync.util')
+
+local M = {}
+
+M.name = 's3'
+
+---@return pending.S3Config?
+local function get_config()
+  local cfg = require('pending.config').get()
+  return cfg.sync and cfg.sync.s3
+end
+
+---@return string[]
+local function base_cmd()
+  local s3cfg = get_config() or {}
+  local cmd = { 'aws' }
+  if s3cfg.profile then
+    table.insert(cmd, '--profile')
+    table.insert(cmd, s3cfg.profile)
+  end
+  if s3cfg.region then
+    table.insert(cmd, '--region')
+    table.insert(cmd, s3cfg.region)
+  end
+  return cmd
+end
+
+---@param task pending.Task
+---@return string
+local function ensure_sync_id(task)
+  if not task._extra then
+    task._extra = {}
+  end
+  local sync_id = task._extra['_s3_sync_id']
+  if not sync_id then
+    local bytes = {}
+    math.randomseed(vim.uv.hrtime())
+    for i = 1, 16 do
+      bytes[i] = math.random(0, 255)
+    end
+    bytes[7] = bit.bor(bit.band(bytes[7], 0x0f), 0x40)
+    bytes[9] = bit.bor(bit.band(bytes[9], 0x3f), 0x80)
+    sync_id = string.format(
+      '%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x',
+      bytes[1],
+      bytes[2],
+      bytes[3],
+      bytes[4],
+      bytes[5],
+      bytes[6],
+      bytes[7],
+      bytes[8],
+      bytes[9],
+      bytes[10],
+      bytes[11],
+      bytes[12],
+      bytes[13],
+      bytes[14],
+      bytes[15],
+      bytes[16]
+    )
+    task._extra['_s3_sync_id'] = sync_id
+    task.modified = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+  end
+  return sync_id
+end
+
+---@return boolean
+local function ensure_credentials()
+  local cmd = base_cmd()
+  vim.list_extend(cmd, { 'sts', 'get-caller-identity', '--output', 'json' })
+  local result = util.system(cmd, { text = true })
+  if result.code == 0 then
+    return true
+  end
+  local stderr = result.stderr or ''
+  if stderr:find('SSO') or stderr:find('sso') then
+    log.info('S3: SSO session expired — running login...')
+    local login_cmd = base_cmd()
+    vim.list_extend(login_cmd, { 'sso', 'login' })
+    local login_result = util.system(login_cmd, { text = true })
+    if login_result.code == 0 then
+      log.info('S3: SSO login successful')
+      return true
+    end
+    log.error('S3: SSO login failed — ' .. (login_result.stderr or ''))
+    return false
+  end
+  if stderr:find('Unable to locate credentials') or stderr:find('NoCredentialProviders') then
+    log.error('S3: no AWS credentials configured. See :h pending-s3')
+  else
+    log.error('S3: credential check failed — ' .. stderr)
+  end
+  return false
+end
+
+local function create_bucket()
+  local name = util.input({ prompt = 'S3 bucket name (pending.nvim): ' })
+  if not name then
+    log.info('S3: bucket creation cancelled')
+    return
+  end
+  if name == '' then
+    name = 'pending.nvim'
+  end
+
+  local region_cmd = base_cmd()
+  vim.list_extend(region_cmd, { 'configure', 'get', 'region' })
+  local region_result = util.system(region_cmd, { text = true })
+  local default_region = 'us-east-1'
+  if region_result.code == 0 and region_result.stdout then
+    local detected = vim.trim(region_result.stdout)
+    if detected ~= '' then
+      default_region = detected
+    end
+  end
+
+  local region = util.input({ prompt = 'AWS region (' .. default_region .. '): ' })
+  if not region or region == '' then
+    region = default_region
+  end
+
+  local cmd = base_cmd()
+  vim.list_extend(cmd, { 's3api', 'create-bucket', '--bucket', name, '--region', region })
+  if region ~= 'us-east-1' then
+    vim.list_extend(cmd, { '--create-bucket-configuration', 'LocationConstraint=' .. region })
+  end
+
+  local result = util.system(cmd, { text = true })
+  if result.code == 0 then
+    log.info(
+      's3: bucket created. Add to your pending.nvim config:\n  sync = { s3 = { bucket = "'
+        .. name
+        .. '", region = "'
+        .. region
+        .. '" } }'
+    )
+  else
+    log.error('S3: bucket creation failed — ' .. (result.stderr or 'unknown error'))
+  end
+end
+
+---@param args? string
+---@return nil
+function M.auth(args)
+  if args == 'profile' then
+    vim.ui.input({ prompt = 'AWS profile name: ' }, function(input)
+      if not input or input == '' then
+        local s3cfg = get_config()
+        if s3cfg and s3cfg.profile then
+          log.info('S3: current profile: ' .. s3cfg.profile)
+        else
+          log.info('S3: no profile configured (using default)')
+        end
+        return
+      end
+      log.info('S3: set profile in your config: sync = { s3 = { profile = "' .. input .. '" } }')
+    end)
+    return
+  end
+
+  util.async(function()
+    local cmd = base_cmd()
+    vim.list_extend(cmd, { 'sts', 'get-caller-identity', '--output', 'json' })
+    local result = util.system(cmd, { text = true })
+    if result.code == 0 then
+      local ok, data = pcall(vim.json.decode, result.stdout or '')
+      if ok and data then
+        log.info('S3: authenticated as ' .. (data.Arn or data.Account or 'unknown'))
+      else
+        log.info('S3: credentials valid')
+      end
+      local s3cfg = get_config()
+      if not s3cfg or not s3cfg.bucket then
+        create_bucket()
+      end
+    else
+      local stderr = result.stderr or ''
+      if stderr:find('SSO') or stderr:find('sso') then
+        log.info('S3: SSO session expired — running login...')
+        local login_cmd = base_cmd()
+        vim.list_extend(login_cmd, { 'sso', 'login' })
+        local login_result = util.system(login_cmd, { text = true })
+        if login_result.code == 0 then
+          log.info('S3: SSO login successful')
+        else
+          log.error('S3: SSO login failed — ' .. (login_result.stderr or ''))
+        end
+      elseif
+        stderr:find('Unable to locate credentials') or stderr:find('NoCredentialProviders')
+      then
+        log.error('S3: no AWS credentials configured. See :h pending-s3')
+      else
+        log.error('S3: ' .. stderr)
+      end
+    end
+  end)
+end
+
+---@return string[]
+function M.auth_complete()
+  return { 'profile' }
+end
+
+function M.push()
+  util.async(function()
+    util.with_guard('S3', function()
+      if not ensure_credentials() then
+        return
+      end
+      local s3cfg = get_config()
+      if not s3cfg or not s3cfg.bucket then
+        log.error('S3: bucket is required. Set sync.s3.bucket in config.')
+        return
+      end
+      local key = s3cfg.key or 'pending.json'
+      local s = require('pending').store()
+
+      for _, task in ipairs(s:tasks()) do
+        ensure_sync_id(task)
+      end
+
+      local tmpfile = vim.fn.tempname() .. '.json'
+      s:save()
+
+      local store = require('pending.store')
+      local tmp_store = store.new(s.path)
+      tmp_store:load()
+
+      local f = io.open(s.path, 'r')
+      if not f then
+        log.error('S3: failed to read store file')
+        return
+      end
+      local content = f:read('*a')
+      f:close()
+
+      local tf = io.open(tmpfile, 'w')
+      if not tf then
+        log.error('S3: failed to create temp file')
+        return
+      end
+      tf:write(content)
+      tf:close()
+
+      local cmd = base_cmd()
+      vim.list_extend(cmd, { 's3', 'cp', tmpfile, 's3://' .. s3cfg.bucket .. '/' .. key })
+      local result = util.system(cmd, { text = true })
+      os.remove(tmpfile)
+
+      if result.code ~= 0 then
+        log.error('S3: push failed — ' .. (result.stderr or 'unknown error'))
+        return
+      end
+
+      util.finish(s)
+      log.info('S3: push uploaded to s3://' .. s3cfg.bucket .. '/' .. key)
+    end)
+  end)
+end
+
+function M.pull()
+  util.async(function()
+    util.with_guard('S3', function()
+      if not ensure_credentials() then
+        return
+      end
+      local s3cfg = get_config()
+      if not s3cfg or not s3cfg.bucket then
+        log.error('S3: bucket is required. Set sync.s3.bucket in config.')
+        return
+      end
+      local key = s3cfg.key or 'pending.json'
+      local tmpfile = vim.fn.tempname() .. '.json'
+
+      local cmd = base_cmd()
+      vim.list_extend(cmd, { 's3', 'cp', 's3://' .. s3cfg.bucket .. '/' .. key, tmpfile })
+      local result = util.system(cmd, { text = true })
+
+      if result.code ~= 0 then
+        os.remove(tmpfile)
+        log.error('S3: pull failed — ' .. (result.stderr or 'unknown error'))
+        return
+      end
+
+      local store = require('pending.store')
+      local s_remote = store.new(tmpfile)
+      local load_ok = pcall(function()
+        s_remote:load()
+      end)
+      if not load_ok then
+        os.remove(tmpfile)
+        log.error('S3: pull failed — could not parse remote store')
+        return
+      end
+
+      local s = require('pending').store()
+      local created, updated, unchanged = 0, 0, 0
+
+      local local_by_sync_id = {}
+      for _, task in ipairs(s:tasks()) do
+        local extra = task._extra or {}
+        local sid = extra['_s3_sync_id']
+        if sid then
+          local_by_sync_id[sid] = task
+        end
+      end
+
+      for _, remote_task in ipairs(s_remote:tasks()) do
+        local r_extra = remote_task._extra or {}
+        local r_sid = r_extra['_s3_sync_id']
+        if not r_sid then
+          goto continue
+        end
+
+        local local_task = local_by_sync_id[r_sid]
+        if local_task then
+          local r_mod = remote_task.modified or ''
+          local l_mod = local_task.modified or ''
+          if r_mod > l_mod then
+            local_task.description = remote_task.description
+            local_task.status = remote_task.status
+            local_task.category = remote_task.category
+            local_task.priority = remote_task.priority
+            local_task.due = remote_task.due
+            local_task.recur = remote_task.recur
+            local_task.recur_mode = remote_task.recur_mode
+            local_task['end'] = remote_task['end']
+            local_task._extra = local_task._extra or {}
+            local_task._extra['_s3_sync_id'] = r_sid
+            local_task.modified = remote_task.modified
+            updated = updated + 1
+          else
+            unchanged = unchanged + 1
+          end
+        else
+          s:add({
+            description = remote_task.description,
+            status = remote_task.status,
+            category = remote_task.category,
+            priority = remote_task.priority,
+            due = remote_task.due,
+            recur = remote_task.recur,
+            recur_mode = remote_task.recur_mode,
+            _extra = { _s3_sync_id = r_sid },
+          })
+          created = created + 1
+        end
+
+        ::continue::
+      end
+
+      os.remove(tmpfile)
+      util.finish(s)
+      log.info('S3: pull ' .. util.fmt_counts({
+        { created, 'added' },
+        { updated, 'updated' },
+        { unchanged, 'unchanged' },
+      }))
+    end)
+  end)
+end
+
+function M.sync()
+  util.async(function()
+    util.with_guard('S3', function()
+      if not ensure_credentials() then
+        return
+      end
+      local s3cfg = get_config()
+      if not s3cfg or not s3cfg.bucket then
+        log.error('S3: bucket is required. Set sync.s3.bucket in config.')
+        return
+      end
+      local key = s3cfg.key or 'pending.json'
+      local tmpfile = vim.fn.tempname() .. '.json'
+
+      local cmd = base_cmd()
+      vim.list_extend(cmd, { 's3', 'cp', 's3://' .. s3cfg.bucket .. '/' .. key, tmpfile })
+      local result = util.system(cmd, { text = true })
+
+      local s = require('pending').store()
+      local created, updated = 0, 0
+
+      if result.code == 0 then
+        local store = require('pending.store')
+        local s_remote = store.new(tmpfile)
+        local load_ok = pcall(function()
+          s_remote:load()
+        end)
+
+        if load_ok then
+          local local_by_sync_id = {}
+          for _, task in ipairs(s:tasks()) do
+            local extra = task._extra or {}
+            local sid = extra['_s3_sync_id']
+            if sid then
+              local_by_sync_id[sid] = task
+            end
+          end
+
+          for _, remote_task in ipairs(s_remote:tasks()) do
+            local r_extra = remote_task._extra or {}
+            local r_sid = r_extra['_s3_sync_id']
+            if not r_sid then
+              goto continue
+            end
+
+            local local_task = local_by_sync_id[r_sid]
+            if local_task then
+              local r_mod = remote_task.modified or ''
+              local l_mod = local_task.modified or ''
+              if r_mod > l_mod then
+                local_task.description = remote_task.description
+                local_task.status = remote_task.status
+                local_task.category = remote_task.category
+                local_task.priority = remote_task.priority
+                local_task.due = remote_task.due
+                local_task.recur = remote_task.recur
+                local_task.recur_mode = remote_task.recur_mode
+                local_task['end'] = remote_task['end']
+                local_task._extra = local_task._extra or {}
+                local_task._extra['_s3_sync_id'] = r_sid
+                local_task.modified = remote_task.modified
+                updated = updated + 1
+              end
+            else
+              s:add({
+                description = remote_task.description,
+                status = remote_task.status,
+                category = remote_task.category,
+                priority = remote_task.priority,
+                due = remote_task.due,
+                recur = remote_task.recur,
+                recur_mode = remote_task.recur_mode,
+                _extra = { _s3_sync_id = r_sid },
+              })
+              created = created + 1
+            end
+
+            ::continue::
+          end
+        end
+      end
+      os.remove(tmpfile)
+
+      for _, task in ipairs(s:tasks()) do
+        ensure_sync_id(task)
+      end
+      s:save()
+
+      local f = io.open(s.path, 'r')
+      if not f then
+        log.error('S3: sync failed — could not read store file')
+        return
+      end
+      local content = f:read('*a')
+      f:close()
+
+      local push_tmpfile = vim.fn.tempname() .. '.json'
+      local tf = io.open(push_tmpfile, 'w')
+      if not tf then
+        log.error('S3: sync failed — could not create temp file')
+        return
+      end
+      tf:write(content)
+      tf:close()
+
+      local push_cmd = base_cmd()
+      vim.list_extend(push_cmd, { 's3', 'cp', push_tmpfile, 's3://' .. s3cfg.bucket .. '/' .. key })
+      local push_result = util.system(push_cmd, { text = true })
+      os.remove(push_tmpfile)
+
+      if push_result.code ~= 0 then
+        log.error('S3: sync push failed — ' .. (push_result.stderr or 'unknown error'))
+        util.finish(s)
+        return
+      end
+
+      util.finish(s)
+      log.info('S3: sync ' .. util.fmt_counts({
+        { created, 'added' },
+        { updated, 'updated' },
+      }) .. ' | push uploaded')
+    end)
+  end)
+end
+
+---@return nil
+function M.health()
+  if vim.fn.executable('aws') == 1 then
+    vim.health.ok('aws CLI found')
+  else
+    vim.health.error('aws CLI not found (required for S3 sync)')
+  end
+
+  local s3cfg = get_config()
+  if s3cfg and s3cfg.bucket then
+    vim.health.ok('S3 bucket configured: ' .. s3cfg.bucket)
+  else
+    vim.health.warn('S3 bucket not configured — set sync.s3.bucket')
+  end
+end
+
+M._ensure_sync_id = ensure_sync_id
+M._ensure_credentials = ensure_credentials
+
+return M

lua/pending/sync/util.lua

@@ -0,0 +1,98 @@
+local log = require('pending.log')
+
+---@class pending.SystemResult
+---@field code integer
+---@field stdout string
+---@field stderr string
+
+---@class pending.CountPart
+---@field [1] integer
+---@field [2] string
+
+---@class pending.sync.util
+local M = {}
+
+local _sync_in_flight = false
+
+---@param fn fun(): nil
+function M.async(fn)
+  coroutine.resume(coroutine.create(fn))
+end
+
+---@param args string[]
+---@param opts? table
+---@return pending.SystemResult
+function M.system(args, opts)
+  local co = coroutine.running()
+  if not co then
+    return vim.system(args, opts or {}):wait() --[[@as pending.SystemResult]]
+  end
+  vim.system(args, opts or {}, function(result)
+    vim.schedule(function()
+      coroutine.resume(co, result)
+    end)
+  end)
+  return coroutine.yield() --[[@as { code: integer, stdout: string, stderr: string }]]
+end
+
+---@param opts? {prompt?: string, default?: string}
+---@return string?
+function M.input(opts)
+  local co = coroutine.running()
+  if not co then
+    error('util.input() must be called inside a coroutine')
+  end
+  vim.ui.input(opts or {}, function(result)
+    vim.schedule(function()
+      coroutine.resume(co, result)
+    end)
+  end)
+  return coroutine.yield() --[[@as string?]]
+end
+
+---@param name string
+---@param fn fun(): nil
+function M.with_guard(name, fn)
+  if _sync_in_flight then
+    log.warn(name .. ': Sync already in progress — please wait.')
+    return
+  end
+  _sync_in_flight = true
+  local ok, err = pcall(fn)
+  _sync_in_flight = false
+  if not ok then
+    log.error(name .. ': ' .. tostring(err))
+  end
+end
+
+---@return boolean
+function M.sync_in_flight()
+  return _sync_in_flight
+end
+
+---@param s pending.Store
+function M.finish(s)
+  s:save()
+  require('pending')._recompute_counts()
+  local buffer = require('pending.buffer')
+  if buffer.bufnr() and vim.api.nvim_buf_is_valid(buffer.bufnr()) then
+    buffer.render(buffer.bufnr())
+  end
+end
+
+---@param parts pending.CountPart[]
+---@return string
+function M.fmt_counts(parts)
+  local items = {}
+  for _, p in ipairs(parts) do
+    if p[1] > 0 then
+      table.insert(items, p[1] .. ' ' .. p[2])
+    end
+  end
+  if #items == 0 then
+    return 'nothing to do'
+  end
+  return table.concat(items, ' | ')
+end
+
+return M

lua/pending/textobj.lua

@@ -0,0 +1,383 @@
+local buffer = require('pending.buffer')
+local config = require('pending.config')
+local log = require('pending.log')
+
+---@class pending.textobj
+local M = {}
+
+---@param ... any
+---@return nil
+local function dbg(...)
+  log.debug(string.format(...))
+end
+
+---@param lnum integer
+---@param meta pending.LineMeta[]
+---@return string
+local function get_line_from_buf(lnum, meta)
+  local _ = meta
+  local bufnr = buffer.bufnr()
+  if not bufnr then
+    return ''
+  end
+  local lines = vim.api.nvim_buf_get_lines(bufnr, lnum - 1, lnum, false)
+  return lines[1] or ''
+end
+
+---@param line string
+---@return integer start_col
+---@return integer end_col
+function M.inner_task_range(line)
+  local prefix_end = line:find('/') and select(2, line:find('^/%d+/%- %[.%] '))
+  if not prefix_end then
+    prefix_end = select(2, line:find('^%- %[.%] ')) or 0
+  end
+  local start_col = prefix_end + 1
+
+  local dk = config.get().date_syntax or 'due'
+  local rk = config.get().recur_syntax or 'rec'
+  local dk_pat = '^' .. vim.pesc(dk) .. ':%S+$'
+  local rk_pat = '^' .. vim.pesc(rk) .. ':%S+$'
+
+  local rest = line:sub(start_col)
+  local words = {}
+  for word in rest:gmatch('%S+') do
+    table.insert(words, word)
+  end
+
+  local i = #words
+  while i >= 1 do
+    local word = words[i]
+    if word:match(dk_pat) or word:match('^cat:%S+$') or word:match(rk_pat) then
+      i = i - 1
+    else
+      break
+    end
+  end
+
+  if i < 1 then
+    return start_col, start_col
+  end
+
+  local desc = table.concat(words, ' ', 1, i)
+  local end_col = start_col + #desc - 1
+  return start_col, end_col
+end
+
+---@param row integer
+---@param meta pending.LineMeta[]
+---@return integer? header_row
+---@return integer? last_row
+function M.category_bounds(row, meta)
+  if not meta or #meta == 0 then
+    return nil, nil
+  end
+
+  local header_row = nil
+  local m = meta[row]
+  if not m then
+    return nil, nil
+  end
+
+  if m.type == 'header' then
+    header_row = row
+  else
+    for r = row, 1, -1 do
+      if meta[r] and meta[r].type == 'header' then
+        header_row = r
+        break
+      end
+    end
+  end
+
+  if not header_row then
+    return nil, nil
+  end
+
+  local last_row = header_row
+  local total = #meta
+  for r = header_row + 1, total do
+    if meta[r].type == 'header' then
+      break
+    end
+    last_row = r
+  end
+
+  return header_row, last_row
+end
+
+---@param count integer
+---@return nil
+function M.a_task(count)
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  local m = meta[row]
+  if not m or m.type ~= 'task' then
+    return
+  end
+
+  local start_row = row
+  local end_row = row
+  count = math.max(1, count)
+  for _ = 2, count do
+    local next_row = end_row + 1
+    if next_row > #meta then
+      break
+    end
+    if meta[next_row] and meta[next_row].type == 'task' then
+      end_row = next_row
+    else
+      break
+    end
+  end
+
+  vim.cmd('normal! ' .. start_row .. 'GV' .. end_row .. 'G')
+end
+
+---@param count integer
+---@return nil
+function M.a_task_visual(count)
+  vim.cmd('normal! \27')
+  M.a_task(count)
+end
+
+---@param count integer
+---@return nil
+function M.i_task(count)
+  local _ = count
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  local m = meta[row]
+  if not m or m.type ~= 'task' then
+    return
+  end
+
+  local line = get_line_from_buf(row, meta)
+  local start_col, end_col = M.inner_task_range(line)
+  if start_col > end_col then
+    return
+  end
+
+  vim.api.nvim_win_set_cursor(0, { row, start_col - 1 })
+  vim.cmd('normal! v')
+  vim.api.nvim_win_set_cursor(0, { row, end_col - 1 })
+end
+
+---@param count integer
+---@return nil
+function M.i_task_visual(count)
+  vim.cmd('normal! \27')
+  M.i_task(count)
+end
+
+---@param count integer
+---@return nil
+function M.a_category(count)
+  local _ = count
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+  local view = buffer.current_view_name()
+  if view == 'priority' then
+    return
+  end
+
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  local header_row, last_row = M.category_bounds(row, meta)
+  if not header_row or not last_row then
+    return
+  end
+
+  local start_row = header_row
+  if header_row > 1 and meta[header_row - 1] and meta[header_row - 1].type == 'blank' then
+    start_row = header_row - 1
+  end
+  local end_row = last_row
+  if last_row < #meta and meta[last_row + 1] and meta[last_row + 1].type == 'blank' then
+    end_row = last_row + 1
+  end
+
+  vim.cmd('normal! ' .. start_row .. 'GV' .. end_row .. 'G')
+end
+
+---@param count integer
+---@return nil
+function M.a_category_visual(count)
+  vim.cmd('normal! \27')
+  M.a_category(count)
+end
+
+---@param count integer
+---@return nil
+function M.i_category(count)
+  local _ = count
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+  local view = buffer.current_view_name()
+  if view == 'priority' then
+    return
+  end
+
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  local header_row, last_row = M.category_bounds(row, meta)
+  if not header_row or not last_row then
+    return
+  end
+
+  local first_task = nil
+  local last_task = nil
+  for r = header_row + 1, last_row do
+    if meta[r] and meta[r].type == 'task' then
+      if not first_task then
+        first_task = r
+      end
+      last_task = r
+    end
+  end
+
+  if not first_task or not last_task then
+    return
+  end
+
+  vim.cmd('normal! ' .. first_task .. 'GV' .. last_task .. 'G')
+end
+
+---@param count integer
+---@return nil
+function M.i_category_visual(count)
+  vim.cmd('normal! \27')
+  M.i_category(count)
+end
+
+---@param count integer
+---@return nil
+function M.next_header(count)
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+  local view = buffer.current_view_name()
+  if view == 'priority' then
+    return
+  end
+
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  dbg('next_header: cursor=%d, meta_len=%d, view=%s', row, #meta, view or 'nil')
+  local found = 0
+  count = math.max(1, count)
+  for r = row + 1, #meta do
+    if meta[r] and meta[r].type == 'header' then
+      found = found + 1
+      dbg(
+        'next_header: found header at row=%d, cat=%s, found=%d/%d',
+        r,
+        meta[r].category or '?',
+        found,
+        count
+      )
+      if found == count then
+        vim.api.nvim_win_set_cursor(0, { r, 0 })
+        dbg('next_header: cursor set to row=%d, actual=%d', r, vim.api.nvim_win_get_cursor(0)[1])
+        return
+      end
+    else
+      dbg('next_header: row=%d type=%s', r, meta[r] and meta[r].type or 'nil')
+    end
+  end
+  dbg('next_header: no header found after row=%d', row)
+end
+
+---@param count integer
+---@return nil
+function M.prev_header(count)
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+  local view = buffer.current_view_name()
+  if view == 'priority' then
+    return
+  end
+
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  dbg('prev_header: cursor=%d, meta_len=%d', row, #meta)
+  local found = 0
+  count = math.max(1, count)
+  for r = row - 1, 1, -1 do
+    if meta[r] and meta[r].type == 'header' then
+      found = found + 1
+      dbg(
+        'prev_header: found header at row=%d, cat=%s, found=%d/%d',
+        r,
+        meta[r].category or '?',
+        found,
+        count
+      )
+      if found == count then
+        vim.api.nvim_win_set_cursor(0, { r, 0 })
+        return
+      end
+    end
+  end
+end
+
+---@param count integer
+---@return nil
+function M.next_task(count)
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  dbg('next_task: cursor=%d, meta_len=%d', row, #meta)
+  local found = 0
+  count = math.max(1, count)
+  for r = row + 1, #meta do
+    if meta[r] and meta[r].type == 'task' then
+      found = found + 1
+      if found == count then
+        dbg('next_task: jumping to row=%d', r)
+        vim.api.nvim_win_set_cursor(0, { r, 0 })
+        return
+      end
+    end
+  end
+  dbg('next_task: no task found after row=%d', row)
+end
+
+---@param count integer
+---@return nil
+function M.prev_task(count)
+  local meta = buffer.meta()
+  if not meta or #meta == 0 then
+    return
+  end
+
+  local row = vim.api.nvim_win_get_cursor(0)[1]
+  dbg('prev_task: cursor=%d, meta_len=%d', row, #meta)
+  local found = 0
+  count = math.max(1, count)
+  for r = row - 1, 1, -1 do
+    if meta[r] and meta[r].type == 'task' then
+      found = found + 1
+      if found == count then
+        dbg('prev_task: jumping to row=%d', r)
+        vim.api.nvim_win_set_cursor(0, { r, 0 })
+        return
+      end
+    end
+  end
+  dbg('prev_task: no task found before row=%d', row)
+end
+
+return M

lua/pending/views.lua

@@ -1,7 +1,15 @@
 local config = require('pending.config')
+local forge = require('pending.forge')
+local parse = require('pending.parse')
+
+---@class pending.ForgeLineMeta
+---@field ref pending.ForgeRef
+---@field cache? pending.ForgeCache
+---@field col_start integer
+---@field col_end integer
 
 ---@class pending.LineMeta
----@field type 'task'|'header'|'blank'
+---@field type 'task'|'header'|'blank'|'filter'
 ---@field id? integer
 ---@field due? string
 ---@field raw_due? string
@@ -10,6 +18,8 @@ local config = require('pending.config')
 ---@field overdue? boolean
 ---@field show_category? boolean
 ---@field priority? integer
+---@field recur? string
+---@field forge_spans? pending.ForgeLineMeta[]
 
 ---@class pending.views
 local M = {}
@@ -20,7 +30,10 @@ local function format_due(due)
   if not due then
     return nil
   end
-  local y, m, d = due:match('^(%d%d%d%d)-(%d%d)-(%d%d)$')
+  local y, m, d, hh, mm = due:match('^(%d%d%d%d)-(%d%d)-(%d%d)T(%d%d):(%d%d)$')
+  if not y then
+    y, m, d = due:match('^(%d%d%d%d)-(%d%d)-(%d%d)$')
+  end
   if not y then
     return due
   end
@@ -29,12 +42,60 @@ local function format_due(due)
     month = tonumber(m) --[[@as integer]],
     day = tonumber(d) --[[@as integer]],
   })
-  return os.date(config.get().date_format, t) --[[@as string]]
+  local formatted = os.date(config.get().date_format, t) --[[@as string]]
+  if hh then
+    formatted = formatted .. ' ' .. hh .. ':' .. mm
+  end
+  return formatted
+end
+
+---@param task pending.Task
+---@param prefix_len integer
+---@return pending.ForgeLineMeta[]?
+local function compute_forge_spans(task, prefix_len)
+  local refs = forge.find_refs(task.description)
+  if #refs == 0 then
+    return nil
+  end
+  local cache = task._extra and task._extra._forge_cache or nil
+  local spans = {}
+  for _, r in ipairs(refs) do
+    table.insert(spans, {
+      ref = r.ref,
+      cache = cache,
+      col_start = prefix_len + r.start_byte,
+      col_end = prefix_len + r.end_byte,
+    })
+  end
+  return spans
+end
+
+---@type table<string, integer>
+local status_rank = { wip = 0, pending = 1, blocked = 2, done = 3 }
+
+---@param task pending.Task
+---@return string
+local function state_char(task)
+  if task.status == 'done' then
+    return 'x'
+  elseif task.status == 'wip' then
+    return '>'
+  elseif task.status == 'blocked' then
+    return '='
+  elseif task.priority > 0 then
+    return '!'
+  end
+  return ' '
 end
 
 ---@param tasks pending.Task[]
 local function sort_tasks(tasks)
   table.sort(tasks, function(a, b)
+    local ra = status_rank[a.status] or 1
+    local rb = status_rank[b.status] or 1
+    if ra ~= rb then
+      return ra < rb
+    end
     if a.priority ~= b.priority then
       return a.priority > b.priority
     end
@@ -48,6 +109,11 @@ end
 ---@param tasks pending.Task[]
 local function sort_tasks_priority(tasks)
   table.sort(tasks, function(a, b)
+    local ra = status_rank[a.status] or 1
+    local rb = status_rank[b.status] or 1
+    if ra ~= rb then
+      return ra < rb
+    end
     if a.priority ~= b.priority then
       return a.priority > b.priority
     end
@@ -73,7 +139,6 @@ end
 ---@return string[] lines
 ---@return pending.LineMeta[] meta
 function M.category_view(tasks)
-  local today = os.date('%Y-%m-%d') --[[@as string]]
   local by_cat = {}
   local cat_order = {}
   local cat_seen = {}
@@ -87,14 +152,14 @@ function M.category_view(tasks)
       by_cat[cat] = {}
       done_by_cat[cat] = {}
     end
-    if task.status == 'done' then
+    if task.status == 'done' or task.status == 'deleted' then
       table.insert(done_by_cat[cat], task)
     else
       table.insert(by_cat[cat], task)
     end
   end
 
-  local cfg_order = config.get().category_order
+  local cfg_order = config.get().view.category.order
   if cfg_order and #cfg_order > 0 then
     local ordered = {}
     local seen = {}
@@ -125,7 +190,7 @@ function M.category_view(tasks)
       table.insert(lines, '')
       table.insert(meta, { type = 'blank' })
     end
-    table.insert(lines, '## ' .. cat)
+    table.insert(lines, '# ' .. cat)
     table.insert(meta, { type = 'header', category = cat })
 
     local all = {}
@@ -138,8 +203,9 @@ function M.category_view(tasks)
 
     for _, task in ipairs(all) do
       local prefix = '/' .. task.id .. '/'
-      local state = task.status == 'done' and 'x' or (task.priority > 0 and '!' or ' ')
+      local state = state_char(task)
       local line = prefix .. '- [' .. state .. '] ' .. task.description
+      local prefix_len = #prefix + #('- [' .. state .. '] ')
       table.insert(lines, line)
       table.insert(meta, {
         type = 'task',
@@ -148,7 +214,10 @@ function M.category_view(tasks)
         raw_due = task.due,
         status = task.status,
         category = cat,
-        overdue = task.status == 'pending' and task.due ~= nil and task.due < today or nil,
+        priority = task.priority,
+        overdue = task.status ~= 'done' and task.due ~= nil and parse.is_overdue(task.due) or nil,
+        recur = task.recur,
+        forge_spans = compute_forge_spans(task, prefix_len),
       })
     end
   end
@@ -160,7 +229,6 @@ end
 ---@return string[] lines
 ---@return pending.LineMeta[] meta
 function M.priority_view(tasks)
-  local today = os.date('%Y-%m-%d') --[[@as string]]
   local pending = {}
   local done = {}
 
@@ -190,6 +258,7 @@ function M.priority_view(tasks)
     local prefix = '/' .. task.id .. '/'
     local state = task.status == 'done' and 'x' or (task.priority > 0 and '!' or ' ')
     local line = prefix .. '- [' .. state .. '] ' .. task.description
+    local prefix_len = #prefix + #('- [' .. state .. '] ')
     table.insert(lines, line)
     table.insert(meta, {
       type = 'task',
@@ -198,8 +267,13 @@ function M.priority_view(tasks)
       raw_due = task.due,
       status = task.status,
       category = task.category,
-      overdue = task.status == 'pending' and task.due ~= nil and task.due < today or nil,
+      priority = task.priority,
+      overdue = task.status ~= 'done' and task.due ~= nil and parse.is_overdue(task.due) or nil,
       show_category = true,
+      recur = task.recur,
+      forge_ref = task._extra and task._extra._forge_ref or nil,
+      forge_cache = task._extra and task._extra._forge_cache or nil,
+      forge_spans = compute_forge_spans(task, prefix_len),
     })
   end
 

plugin/pending.lua

@@ -3,16 +3,274 @@ if vim.g.loaded_pending then
 end
 vim.g.loaded_pending = true
 
+---@return string[]
+local function edit_field_candidates()
+  local cfg = require('pending.config').get()
+  local dk = cfg.date_syntax or 'due'
+  local rk = cfg.recur_syntax or 'rec'
+  return {
+    dk .. ':',
+    'cat:',
+    rk .. ':',
+    '+!',
+    '+!!',
+    '+!!!',
+    '-!',
+    '-' .. dk,
+    '-cat',
+    '-' .. rk,
+  }
+end
+
+---@return string[]
+local function edit_date_values()
+  return {
+    'today',
+    'tomorrow',
+    'yesterday',
+    '+1d',
+    '+2d',
+    '+3d',
+    '+1w',
+    '+2w',
+    '+1m',
+    'mon',
+    'tue',
+    'wed',
+    'thu',
+    'fri',
+    'sat',
+    'sun',
+    'eod',
+    'eow',
+    'eom',
+    'eoq',
+    'eoy',
+    'sow',
+    'som',
+    'soq',
+    'soy',
+    'later',
+  }
+end
+
+---@return string[]
+local function edit_recur_values()
+  local ok, recur = pcall(require, 'pending.recur')
+  if not ok then
+    return {}
+  end
+  local result = {}
+  for _, s in ipairs(recur.shorthand_list()) do
+    table.insert(result, s)
+  end
+  for _, s in ipairs(recur.shorthand_list()) do
+    table.insert(result, '!' .. s)
+  end
+  return result
+end
+
+---@param lead string
+---@param candidates string[]
+---@return string[]
+local function filter_candidates(lead, candidates)
+  return vim.tbl_filter(function(s)
+    return s:find(lead, 1, true) == 1
+  end, candidates)
+end
+
+---@param arg_lead string
+---@param cmd_line string
+---@return string[]
+local function complete_edit(arg_lead, cmd_line)
+  local cfg = require('pending.config').get()
+  local dk = cfg.date_syntax or 'due'
+  local rk = cfg.recur_syntax or 'rec'
+
+  local after_edit = cmd_line:match('^Pending%s+edit%s+(.*)')
+  if not after_edit then
+    return {}
+  end
+
+  local parts = {}
+  for part in after_edit:gmatch('%S+') do
+    table.insert(parts, part)
+  end
+
+  local trailing_space = after_edit:match('%s$')
+  if #parts == 0 or (#parts == 1 and not trailing_space) then
+    local store = require('pending.store')
+    local s = store.new(store.resolve_path())
+    s:load()
+    local ids = {}
+    for _, task in ipairs(s:active_tasks()) do
+      table.insert(ids, tostring(task.id))
+    end
+    return filter_candidates(arg_lead, ids)
+  end
+
+  local prefix = arg_lead:match('^(' .. vim.pesc(dk) .. ':)(.*)$')
+  if prefix then
+    local after_colon = arg_lead:sub(#prefix + 1)
+    local dates = edit_date_values()
+    local result = {}
+    for _, d in ipairs(dates) do
+      if d:find(after_colon, 1, true) == 1 then
+        table.insert(result, prefix .. d)
+      end
+    end
+    return result
+  end
+
+  local rec_prefix = arg_lead:match('^(' .. vim.pesc(rk) .. ':)(.*)$')
+  if rec_prefix then
+    local after_colon = arg_lead:sub(#rec_prefix + 1)
+    local pats = edit_recur_values()
+    local result = {}
+    for _, p in ipairs(pats) do
+      if p:find(after_colon, 1, true) == 1 then
+        table.insert(result, rec_prefix .. p)
+      end
+    end
+    return result
+  end
+
+  local cat_prefix = arg_lead:match('^(cat:)(.*)$')
+  if cat_prefix then
+    local after_colon = arg_lead:sub(#cat_prefix + 1)
+    local store = require('pending.store')
+    local s = store.new(store.resolve_path())
+    s:load()
+    local seen = {}
+    local cats = {}
+    for _, task in ipairs(s:active_tasks()) do
+      if task.category and not seen[task.category] then
+        seen[task.category] = true
+        table.insert(cats, task.category)
+      end
+    end
+    table.sort(cats)
+    local result = {}
+    for _, c in ipairs(cats) do
+      if c:find(after_colon, 1, true) == 1 then
+        table.insert(result, cat_prefix .. c)
+      end
+    end
+    return result
+  end
+
+  return filter_candidates(arg_lead, edit_field_candidates())
+end
+
 vim.api.nvim_create_user_command('Pending', function(opts)
   require('pending').command(opts.args)
 end, {
+  bar = true,
   nargs = '*',
   complete = function(arg_lead, cmd_line)
-    local subcmds = { 'add', 'sync', 'archive', 'due', 'undo' }
+    local pending = require('pending')
+    local subcmds = { 'add', 'archive', 'auth', 'done', 'due', 'edit', 'filter', 'undo' }
+    for _, b in ipairs(pending.sync_backends()) do
+      table.insert(subcmds, b)
+    end
+    table.sort(subcmds)
     if not cmd_line:match('^Pending%s+%S') then
-      return vim.tbl_filter(function(s)
+      return filter_candidates(arg_lead, subcmds)
-        return s:find(arg_lead, 1, true) == 1
+    end
-      end, subcmds)
+    if cmd_line:match('^Pending%s+filter') then
+      local after_filter = cmd_line:match('^Pending%s+filter%s+(.*)') or ''
+      local used = {}
+      for word in after_filter:gmatch('%S+') do
+        used[word] = true
+      end
+      local candidates =
+        { 'clear', 'overdue', 'today', 'priority', 'done', 'pending', 'wip', 'blocked' }
+      local store = require('pending.store')
+      local s = store.new(store.resolve_path())
+      s:load()
+      local seen = {}
+      for _, task in ipairs(s:active_tasks()) do
+        if task.category and not seen[task.category] then
+          seen[task.category] = true
+          table.insert(candidates, 'cat:' .. task.category)
+        end
+      end
+      local filtered = {}
+      for _, c in ipairs(candidates) do
+        if not used[c] and (arg_lead == '' or c:find(arg_lead, 1, true) == 1) then
+          table.insert(filtered, c)
+        end
+      end
+      return filtered
+    end
+    if cmd_line:match('^Pending%s+archive%s') then
+      return filter_candidates(arg_lead, { '7d', '2w', '30d', '3m', '6m', '1y' })
+    end
+    if cmd_line:match('^Pending%s+done%s') then
+      local store = require('pending.store')
+      local s = store.new(store.resolve_path())
+      s:load()
+      local ids = {}
+      for _, task in ipairs(s:active_tasks()) do
+        table.insert(ids, tostring(task.id))
+      end
+      return filter_candidates(arg_lead, ids)
+    end
+    if cmd_line:match('^Pending%s+edit') then
+      return complete_edit(arg_lead, cmd_line)
+    end
+    if cmd_line:match('^Pending%s+auth') then
+      local after_auth = cmd_line:match('^Pending%s+auth%s+(.*)') or ''
+      local parts = {}
+      for w in after_auth:gmatch('%S+') do
+        table.insert(parts, w)
+      end
+      local trailing = after_auth:match('%s$')
+      if #parts == 0 or (#parts == 1 and not trailing) then
+        local auth_names = {}
+        for _, b in ipairs(pending.sync_backends()) do
+          local ok, mod = pcall(require, 'pending.sync.' .. b)
+          if ok and type(mod.auth) == 'function' then
+            table.insert(auth_names, b)
+          end
+        end
+        return filter_candidates(arg_lead, auth_names)
+      end
+      local backend_name = parts[1]
+      if #parts == 1 or (#parts == 2 and not trailing) then
+        local ok, mod = pcall(require, 'pending.sync.' .. backend_name)
+        if ok and type(mod.auth_complete) == 'function' then
+          return filter_candidates(arg_lead, mod.auth_complete())
+        end
+        return {}
+      end
+      return {}
+    end
+    local backend_set = pending.sync_backend_set()
+    local matched_backend = cmd_line:match('^Pending%s+(%S+)')
+    if matched_backend and backend_set[matched_backend] then
+      local after_backend = cmd_line:match('^Pending%s+%S+%s+(.*)')
+      if not after_backend then
+        return {}
+      end
+      local ok, mod = pcall(require, 'pending.sync.' .. matched_backend)
+      if not ok then
+        return {}
+      end
+      local actions = {}
+      for k, v in pairs(mod) do
+        if
+          type(v) == 'function'
+          and k:sub(1, 1) ~= '_'
+          and k ~= 'health'
+          and k ~= 'auth'
+          and k ~= 'auth_complete'
+        then
+          table.insert(actions, k)
+        end
+      end
+      table.sort(actions)
+      return filter_candidates(arg_lead, actions)
     end
     return {}
   end,
@@ -22,6 +280,10 @@ vim.keymap.set('n', '<Plug>(pending-open)', function()
   require('pending').open()
 end)
 
+vim.keymap.set('n', '<Plug>(pending-close)', function()
+  require('pending.buffer').close()
+end)
+
 vim.keymap.set('n', '<Plug>(pending-toggle)', function()
   require('pending').toggle_complete()
 end)
@@ -37,3 +299,97 @@ end)
 vim.keymap.set('n', '<Plug>(pending-date)', function()
   require('pending').prompt_date()
 end)
+
+vim.keymap.set('n', '<Plug>(pending-undo)', function()
+  require('pending').undo_write()
+end)
+
+vim.keymap.set('n', '<Plug>(pending-category)', function()
+  require('pending').prompt_category()
+end)
+
+vim.keymap.set('n', '<Plug>(pending-recur)', function()
+  require('pending').prompt_recur()
+end)
+
+vim.keymap.set('n', '<Plug>(pending-move-down)', function()
+  require('pending').move_task('down')
+end)
+
+vim.keymap.set('n', '<Plug>(pending-move-up)', function()
+  require('pending').move_task('up')
+end)
+
+vim.keymap.set('n', '<Plug>(pending-wip)', function()
+  require('pending').toggle_status('wip')
+end)
+
+vim.keymap.set('n', '<Plug>(pending-blocked)', function()
+  require('pending').toggle_status('blocked')
+end)
+
+vim.keymap.set('n', '<Plug>(pending-priority-up)', function()
+  require('pending').increment_priority()
+end)
+
+vim.keymap.set('n', '<Plug>(pending-priority-down)', function()
+  require('pending').decrement_priority()
+end)
+
+vim.keymap.set('n', '<Plug>(pending-filter)', function()
+  vim.ui.input({ prompt = 'Filter: ' }, function(input)
+    if input then
+      require('pending').filter(input)
+    end
+  end)
+end)
+
+vim.keymap.set('n', '<Plug>(pending-open-line)', function()
+  require('pending.buffer').open_line(false)
+end)
+
+vim.keymap.set('n', '<Plug>(pending-open-line-above)', function()
+  require('pending.buffer').open_line(true)
+end)
+
+vim.keymap.set({ 'o', 'x' }, '<Plug>(pending-a-task)', function()
+  require('pending.textobj').a_task(vim.v.count1)
+end)
+
+vim.keymap.set({ 'o', 'x' }, '<Plug>(pending-i-task)', function()
+  require('pending.textobj').i_task(vim.v.count1)
+end)
+
+vim.keymap.set({ 'o', 'x' }, '<Plug>(pending-a-category)', function()
+  require('pending.textobj').a_category(vim.v.count1)
+end)
+
+vim.keymap.set({ 'o', 'x' }, '<Plug>(pending-i-category)', function()
+  require('pending.textobj').i_category(vim.v.count1)
+end)
+
+vim.keymap.set({ 'n', 'x', 'o' }, '<Plug>(pending-next-header)', function()
+  require('pending.textobj').next_header(vim.v.count1)
+end)
+
+vim.keymap.set({ 'n', 'x', 'o' }, '<Plug>(pending-prev-header)', function()
+  require('pending.textobj').prev_header(vim.v.count1)
+end)
+
+vim.keymap.set({ 'n', 'x', 'o' }, '<Plug>(pending-next-task)', function()
+  require('pending.textobj').next_task(vim.v.count1)
+end)
+
+vim.keymap.set({ 'n', 'x', 'o' }, '<Plug>(pending-prev-task)', function()
+  require('pending.textobj').prev_task(vim.v.count1)
+end)
+
+vim.keymap.set('n', '<Plug>(pending-tab)', function()
+  vim.cmd.tabnew()
+  require('pending').open()
+end)
+
+vim.api.nvim_create_user_command('PendingTab', function()
+  vim.cmd.tabnew()
+  require('pending').open()
+end, {})

scripts/ci.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+set -eu
+
+nix develop --command stylua --check .
+git ls-files '*.lua' | xargs nix develop --command selene --display-style quiet
+nix develop --command prettier --check .
+nix fmt
+git diff --exit-code -- '*.nix'
+nix develop --command lua-language-server --check lua --configpath "$(pwd)/.luarc.json" --checklevel=Warning
+nix develop --command busted

spec/archive_spec.lua

@@ -1,87 +1,115 @@
 require('spec.helpers')
 
 local config = require('pending.config')
-local store = require('pending.store')
 
 describe('archive', function()
   local tmpdir
-  local pending = require('pending')
+  local pending
+  local ui_input_orig
 
   before_each(function()
     tmpdir = vim.fn.tempname()
     vim.fn.mkdir(tmpdir, 'p')
     vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
     config.reset()
-    store.unload()
+    package.loaded['pending'] = nil
-    store.load()
+    pending = require('pending')
+    pending.store():load()
+    ui_input_orig = vim.ui.input
   end)
 
   after_each(function()
+    vim.ui.input = ui_input_orig
     vim.fn.delete(tmpdir, 'rf')
     vim.g.pending = nil
     config.reset()
+    package.loaded['pending'] = nil
   end)
 
+  local function auto_confirm_y()
+    vim.ui.input = function(_, on_confirm)
+      on_confirm('y')
+    end
+  end
+
+  local function auto_confirm_n()
+    vim.ui.input = function(_, on_confirm)
+      on_confirm('n')
+    end
+  end
+
   it('removes done tasks completed more than 30 days ago', function()
-    local t = store.add({ description = 'Old done task' })
+    auto_confirm_y()
-    store.update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    local s = pending.store()
+    local t = s:add({ description = 'Old done task' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
     pending.archive()
-    assert.are.equal(0, #store.active_tasks())
+    assert.are.equal(0, #s:active_tasks())
   end)
 
   it('keeps done tasks completed fewer than 30 days ago', function()
+    auto_confirm_y()
+    local s = pending.store()
     local recent_end = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (5 * 86400))
-    local t = store.add({ description = 'Recent done task' })
+    local t = s:add({ description = 'Recent done task' })
-    store.update(t.id, { status = 'done', ['end'] = recent_end })
+    s:update(t.id, { status = 'done', ['end'] = recent_end })
     pending.archive()
-    local active = store.active_tasks()
+    local active = s:active_tasks()
     assert.are.equal(1, #active)
     assert.are.equal('Recent done task', active[1].description)
   end)
 
-  it('respects a custom day count', function()
+  it('respects duration string 7d', function()
+    auto_confirm_y()
+    local s = pending.store()
     local eight_days_ago = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (8 * 86400))
-    local t = store.add({ description = 'Old for 7 days' })
+    local t = s:add({ description = 'Old for 7 days' })
-    store.update(t.id, { status = 'done', ['end'] = eight_days_ago })
+    s:update(t.id, { status = 'done', ['end'] = eight_days_ago })
-    pending.archive(7)
+    pending.archive('7d')
-    assert.are.equal(0, #store.active_tasks())
+    assert.are.equal(0, #s:active_tasks())
   end)
 
-  it('keeps tasks within the custom day cutoff', function()
+  it('respects duration string 2w', function()
+    auto_confirm_y()
+    local s = pending.store()
+    local fifteen_days_ago = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (15 * 86400))
+    local t = s:add({ description = 'Old for 2 weeks' })
+    s:update(t.id, { status = 'done', ['end'] = fifteen_days_ago })
+    pending.archive('2w')
+    assert.are.equal(0, #s:active_tasks())
+  end)
+
+  it('respects duration string 2m', function()
+    auto_confirm_y()
+    local s = pending.store()
+    local t = s:add({ description = 'Old for 2 months' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    pending.archive('2m')
+    assert.are.equal(0, #s:active_tasks())
+  end)
+
+  it('respects bare integer as days (backwards compat)', function()
+    auto_confirm_y()
+    local s = pending.store()
+    local eight_days_ago = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (8 * 86400))
+    local t = s:add({ description = 'Old for 7 days' })
+    s:update(t.id, { status = 'done', ['end'] = eight_days_ago })
+    pending.archive('7')
+    assert.are.equal(0, #s:active_tasks())
+  end)
+
+  it('keeps tasks within the custom duration cutoff', function()
+    auto_confirm_y()
+    local s = pending.store()
     local five_days_ago = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (5 * 86400))
-    local t = store.add({ description = 'Recent for 7 days' })
+    local t = s:add({ description = 'Recent for 7 days' })
-    store.update(t.id, { status = 'done', ['end'] = five_days_ago })
+    s:update(t.id, { status = 'done', ['end'] = five_days_ago })
-    pending.archive(7)
+    pending.archive('7d')
-    local active = store.active_tasks()
+    local active = s:active_tasks()
     assert.are.equal(1, #active)
   end)
 
-  it('never archives pending tasks regardless of age', function()
+  it('errors on invalid duration input', function()
-    store.add({ description = 'Still pending' })
-    pending.archive()
-    local active = store.active_tasks()
-    assert.are.equal(1, #active)
-    assert.are.equal('pending', active[1].status)
-  end)
-
-  it('removes deleted tasks past the cutoff', function()
-    local t = store.add({ description = 'Old deleted task' })
-    store.update(t.id, { status = 'deleted', ['end'] = '2020-01-01T00:00:00Z' })
-    pending.archive()
-    local all = store.tasks()
-    assert.are.equal(0, #all)
-  end)
-
-  it('keeps deleted tasks within the cutoff', function()
-    local recent_end = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (5 * 86400))
-    local t = store.add({ description = 'Recent deleted' })
-    store.update(t.id, { status = 'deleted', ['end'] = recent_end })
-    pending.archive()
-    local all = store.tasks()
-    assert.are.equal(1, #all)
-  end)
-
-  it('reports the correct count in vim.notify', function()
     local messages = {}
     local orig_notify = vim.notify
     vim.notify = function(msg, ...)
@@ -89,11 +117,120 @@ describe('archive', function()
       return orig_notify(msg, ...)
     end
 
-    local t1 = store.add({ description = 'Old 1' })
+    local s = pending.store()
-    local t2 = store.add({ description = 'Old 2' })
+    local t = s:add({ description = 'Task' })
-    store.add({ description = 'Keep' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
-    store.update(t1.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    pending.archive('xyz')
-    store.update(t2.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+
+    vim.notify = orig_notify
+    assert.are.equal(1, #s:tasks())
+
+    local found = false
+    for _, msg in ipairs(messages) do
+      if msg:find('Invalid duration') then
+        found = true
+        break
+      end
+    end
+    assert.is_true(found)
+  end)
+
+  it('never archives pending tasks regardless of age', function()
+    auto_confirm_y()
+    local s = pending.store()
+    s:add({ description = 'Still pending' })
+    pending.archive()
+    local active = s:active_tasks()
+    assert.are.equal(1, #active)
+    assert.are.equal('pending', active[1].status)
+  end)
+
+  it('removes deleted tasks past the cutoff', function()
+    auto_confirm_y()
+    local s = pending.store()
+    local t = s:add({ description = 'Old deleted task' })
+    s:update(t.id, { status = 'deleted', ['end'] = '2020-01-01T00:00:00Z' })
+    pending.archive()
+    local all = s:tasks()
+    assert.are.equal(0, #all)
+  end)
+
+  it('keeps deleted tasks within the cutoff', function()
+    auto_confirm_y()
+    local s = pending.store()
+    local recent_end = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (5 * 86400))
+    local t = s:add({ description = 'Recent deleted' })
+    s:update(t.id, { status = 'deleted', ['end'] = recent_end })
+    pending.archive()
+    local all = s:tasks()
+    assert.are.equal(1, #all)
+  end)
+
+  it('skips confirmation and reports when no tasks match', function()
+    local input_called = false
+    vim.ui.input = function()
+      input_called = true
+    end
+
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, ...)
+      table.insert(messages, msg)
+      return orig_notify(msg, ...)
+    end
+
+    local s = pending.store()
+    s:add({ description = 'Still pending' })
+    pending.archive()
+
+    vim.notify = orig_notify
+    assert.is_false(input_called)
+
+    local found = false
+    for _, msg in ipairs(messages) do
+      if msg:find('No tasks to archive') then
+        found = true
+        break
+      end
+    end
+    assert.is_true(found)
+  end)
+
+  it('does not archive when user declines confirmation', function()
+    auto_confirm_n()
+    local s = pending.store()
+    local t = s:add({ description = 'Old done task' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    pending.archive()
+    assert.are.equal(1, #s:tasks())
+  end)
+
+  it('does not archive when user cancels confirmation (nil)', function()
+    vim.ui.input = function(_, on_confirm)
+      on_confirm(nil)
+    end
+    local s = pending.store()
+    local t = s:add({ description = 'Old done task' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    pending.archive()
+    assert.are.equal(1, #s:tasks())
+  end)
+
+  it('reports the correct count in vim.notify', function()
+    auto_confirm_y()
+    local s = pending.store()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, ...)
+      table.insert(messages, msg)
+      return orig_notify(msg, ...)
+    end
+
+    local t1 = s:add({ description = 'Old 1' })
+    local t2 = s:add({ description = 'Old 2' })
+    s:add({ description = 'Keep' })
+    s:update(t1.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    s:update(t2.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
 
     pending.archive()
 
@@ -109,17 +246,19 @@ describe('archive', function()
     assert.is_true(found)
   end)
 
-  it('leaves only kept tasks in store.active_tasks after archive', function()
+  it('leaves only kept tasks in store after archive', function()
-    local t1 = store.add({ description = 'Old done' })
+    auto_confirm_y()
-    store.add({ description = 'Keep pending' })
+    local s = pending.store()
+    local t1 = s:add({ description = 'Old done' })
+    s:add({ description = 'Keep pending' })
     local recent_end = os.date('!%Y-%m-%dT%H:%M:%SZ', os.time() - (5 * 86400))
-    local t3 = store.add({ description = 'Keep recent done' })
+    local t3 = s:add({ description = 'Keep recent done' })
-    store.update(t1.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    s:update(t1.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
-    store.update(t3.id, { status = 'done', ['end'] = recent_end })
+    s:update(t3.id, { status = 'done', ['end'] = recent_end })
 
     pending.archive()
 
-    local active = store.active_tasks()
+    local active = s:active_tasks()
     assert.are.equal(2, #active)
     local descs = {}
     for _, task in ipairs(active) do
@@ -130,11 +269,29 @@ describe('archive', function()
   end)
 
   it('persists archived tasks to disk after unload/reload', function()
-    local t = store.add({ description = 'Archived task' })
+    auto_confirm_y()
-    store.update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    local s = pending.store()
+    local t = s:add({ description = 'Archived task' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
     pending.archive()
-    store.unload()
+    s:load()
-    store.load()
+    assert.are.equal(0, #s:active_tasks())
-    assert.are.equal(0, #store.active_tasks())
+  end)
+
+  it('includes the duration in the confirmation prompt', function()
+    local prompt_text
+    vim.ui.input = function(opts, on_confirm)
+      prompt_text = opts.prompt
+      on_confirm('n')
+    end
+
+    local s = pending.store()
+    local t = s:add({ description = 'Old' })
+    s:update(t.id, { status = 'done', ['end'] = '2020-01-01T00:00:00Z' })
+    pending.archive('3w')
+
+    assert.is_not_nil(prompt_text)
+    assert.truthy(prompt_text:find('21d'))
+    assert.truthy(prompt_text:find('1 task'))
   end)
 end)

spec/complete_spec.lua

@@ -0,0 +1,173 @@
+require('spec.helpers')
+
+local buffer = require('pending.buffer')
+local config = require('pending.config')
+local store = require('pending.store')
+
+describe('complete', function()
+  local tmpdir
+  local s
+  local complete = require('pending.complete')
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    config.reset()
+    s = store.new(tmpdir .. '/tasks.json')
+    s:load()
+    buffer.set_store(s)
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    config.reset()
+    buffer.set_store(nil)
+  end)
+
+  describe('findstart', function()
+    it('returns column after colon for cat: prefix', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task cat:Wo' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 16 })
+      local result = complete.omnifunc(1, '')
+      assert.are.equal(15, result)
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('returns column after colon for due: prefix', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task due:to' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 16 })
+      local result = complete.omnifunc(1, '')
+      assert.are.equal(15, result)
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('returns column after colon for rec: prefix', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task rec:we' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 16 })
+      local result = complete.omnifunc(1, '')
+      assert.are.equal(15, result)
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('returns -1 for non-token position', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] some task ' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 14 })
+      local result = complete.omnifunc(1, '')
+      assert.are.equal(-1, result)
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+  end)
+
+  describe('completions', function()
+    it('returns existing categories for cat:', function()
+      s:add({ description = 'A', category = 'Work' })
+      s:add({ description = 'B', category = 'Home' })
+      s:add({ description = 'C', category = 'Work' })
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task cat: x' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 15 })
+      complete.omnifunc(1, '')
+      local result = complete.omnifunc(0, '')
+      local words = {}
+      for _, item in ipairs(result) do
+        table.insert(words, item.word)
+      end
+      assert.is_true(vim.tbl_contains(words, 'Work'))
+      assert.is_true(vim.tbl_contains(words, 'Home'))
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('filters categories by base', function()
+      s:add({ description = 'A', category = 'Work' })
+      s:add({ description = 'B', category = 'Home' })
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task cat:W' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 15 })
+      complete.omnifunc(1, '')
+      local result = complete.omnifunc(0, 'W')
+      assert.are.equal(1, #result)
+      assert.are.equal('Work', result[1].word)
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('returns named dates for due:', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task due: x' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 15 })
+      complete.omnifunc(1, '')
+      local result = complete.omnifunc(0, '')
+      assert.is_true(#result > 0)
+      local words = {}
+      for _, item in ipairs(result) do
+        table.insert(words, item.word)
+      end
+      assert.is_true(vim.tbl_contains(words, 'today'))
+      assert.is_true(vim.tbl_contains(words, 'tomorrow'))
+      assert.is_true(vim.tbl_contains(words, 'eom'))
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('filters dates by base prefix', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task due:to' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 16 })
+      complete.omnifunc(1, '')
+      local result = complete.omnifunc(0, 'to')
+      local words = {}
+      for _, item in ipairs(result) do
+        table.insert(words, item.word)
+      end
+      assert.is_true(vim.tbl_contains(words, 'today'))
+      assert.is_true(vim.tbl_contains(words, 'tomorrow'))
+      assert.is_false(vim.tbl_contains(words, 'eom'))
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('returns recurrence shorthands for rec:', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task rec: x' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 15 })
+      complete.omnifunc(1, '')
+      local result = complete.omnifunc(0, '')
+      assert.is_true(#result > 0)
+      local words = {}
+      for _, item in ipairs(result) do
+        table.insert(words, item.word)
+      end
+      assert.is_true(vim.tbl_contains(words, 'daily'))
+      assert.is_true(vim.tbl_contains(words, 'weekly'))
+      assert.is_true(vim.tbl_contains(words, '!weekly'))
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('filters recurrence by base prefix', function()
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, { '- [ ] task rec:we' })
+      vim.api.nvim_set_current_buf(bufnr)
+      vim.api.nvim_win_set_cursor(0, { 1, 16 })
+      complete.omnifunc(1, '')
+      local result = complete.omnifunc(0, 'we')
+      local words = {}
+      for _, item in ipairs(result) do
+        table.insert(words, item.word)
+      end
+      assert.is_true(vim.tbl_contains(words, 'weekly'))
+      assert.is_true(vim.tbl_contains(words, 'weekdays'))
+      assert.is_false(vim.tbl_contains(words, 'daily'))
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+  end)
+end)

spec/diff_spec.lua

@@ -1,35 +1,31 @@
 require('spec.helpers')
 
-local config = require('pending.config')
 local store = require('pending.store')
 
 describe('diff', function()
   local tmpdir
+  local s
   local diff = require('pending.diff')
 
   before_each(function()
     tmpdir = vim.fn.tempname()
     vim.fn.mkdir(tmpdir, 'p')
-    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    s = store.new(tmpdir .. '/tasks.json')
-    config.reset()
+    s:load()
-    store.unload()
-    store.load()
   end)
 
   after_each(function()
     vim.fn.delete(tmpdir, 'rf')
-    vim.g.pending = nil
-    config.reset()
   end)
 
   describe('parse_buffer', function()
     it('parses headers and tasks', function()
       local lines = {
-        '## School',
+        '# School',
         '/1/- [ ] Do homework',
         '/2/- [!] Read chapter 5',
         '',
-        '## Errands',
+        '# Errands',
         '/3/- [ ] Buy groceries',
       }
       local result = diff.parse_buffer(lines)
@@ -48,7 +44,7 @@ describe('diff', function()
 
     it('handles new tasks without ids', function()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '- [ ] New task here',
       }
       local result = diff.parse_buffer(lines)
@@ -60,7 +56,7 @@ describe('diff', function()
 
     it('inline cat: token overrides header category', function()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Buy milk cat:Work',
       }
       local result = diff.parse_buffer(lines)
@@ -69,9 +65,28 @@ describe('diff', function()
       assert.are.equal('Work', result[2].category)
     end)
 
+    it('extracts rec: token from buffer line', function()
+      local lines = {
+        '# Inbox',
+        '/1/- [ ] Take trash out rec:weekly',
+      }
+      local result = diff.parse_buffer(lines)
+      assert.are.equal('weekly', result[2].rec)
+    end)
+
+    it('extracts rec: with completion mode', function()
+      local lines = {
+        '# Inbox',
+        '/1/- [ ] Water plants rec:!daily',
+      }
+      local result = diff.parse_buffer(lines)
+      assert.are.equal('daily', result[2].rec)
+      assert.are.equal('completion', result[2].rec_mode)
+    end)
+
     it('inline due: token is parsed', function()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Buy milk due:2026-03-15',
       }
       local result = diff.parse_buffer(lines)
@@ -84,140 +99,254 @@ describe('diff', function()
   describe('apply', function()
     it('creates new tasks from buffer lines', function()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '- [ ] First task',
         '- [ ] Second task',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local tasks = s:active_tasks()
-      local tasks = store.active_tasks()
       assert.are.equal(2, #tasks)
       assert.are.equal('First task', tasks[1].description)
       assert.are.equal('Second task', tasks[2].description)
     end)
 
     it('deletes tasks removed from buffer', function()
-      store.add({ description = 'Keep me' })
+      s:add({ description = 'Keep me' })
-      store.add({ description = 'Delete me' })
+      s:add({ description = 'Delete me' })
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Keep me',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local active = s:active_tasks()
-      local active = store.active_tasks()
       assert.are.equal(1, #active)
       assert.are.equal('Keep me', active[1].description)
-      local deleted = store.get(2)
+      local deleted = s:get(2)
       assert.are.equal('deleted', deleted.status)
     end)
 
     it('updates modified tasks', function()
-      store.add({ description = 'Original' })
+      s:add({ description = 'Original' })
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Renamed',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local task = s:get(1)
-      local task = store.get(1)
       assert.are.equal('Renamed', task.description)
     end)
 
     it('updates modified when description is renamed', function()
-      local t = store.add({ description = 'Original', category = 'Inbox' })
+      local t = s:add({ description = 'Original', category = 'Inbox' })
       t.modified = '2020-01-01T00:00:00Z'
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Renamed',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local task = s:get(1)
-      local task = store.get(1)
       assert.are.equal('Renamed', task.description)
       assert.is_not.equal('2020-01-01T00:00:00Z', task.modified)
     end)
 
     it('handles duplicate ids as copies', function()
-      store.add({ description = 'Original' })
+      s:add({ description = 'Original' })
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Original',
         '/1/- [ ] Copy of original',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local tasks = s:active_tasks()
-      local tasks = store.active_tasks()
       assert.are.equal(2, #tasks)
     end)
 
     it('moves tasks between categories', function()
-      store.add({ description = 'Moving task', category = 'Inbox' })
+      s:add({ description = 'Moving task', category = 'Inbox' })
-      store.save()
+      s:save()
       local lines = {
-        '## Work',
+        '# Work',
         '/1/- [ ] Moving task',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local task = s:get(1)
-      local task = store.get(1)
       assert.are.equal('Work', task.category)
     end)
 
     it('does not update modified when task is unchanged', function()
-      store.add({ description = 'Stable task', category = 'Inbox' })
+      s:add({ description = 'Stable task', category = 'Inbox' })
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Stable task',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local modified_after_first = s:get(1).modified
-      local modified_after_first = store.get(1).modified
+      diff.apply(lines, s)
-      diff.apply(lines)
+      s:load()
-      store.unload()
+      local task = s:get(1)
-      store.load()
-      local task = store.get(1)
       assert.are.equal(modified_after_first, task.modified)
     end)
 
-    it('clears due when removed from buffer line', function()
+    it('preserves due when not present in buffer line', function()
-      store.add({ description = 'Pay bill', due = '2026-03-15' })
+      s:add({ description = 'Pay bill', due = '2026-03-15' })
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Pay bill',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local task = s:get(1)
-      local task = store.get(1)
+      assert.are.equal('2026-03-15', task.due)
-      assert.is_nil(task.due)
+    end)
+
+    it('updates due when inline token is present', function()
+      s:add({ description = 'Pay bill', due = '2026-03-15' })
+      s:save()
+      local lines = {
+        '# Inbox',
+        '/1/- [ ] Pay bill due:2026-04-01',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('2026-04-01', task.due)
+    end)
+
+    it('stores recur field on new tasks from buffer', function()
+      local lines = {
+        '# Inbox',
+        '- [ ] Take out trash rec:weekly',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local tasks = s:active_tasks()
+      assert.are.equal(1, #tasks)
+      assert.are.equal('weekly', tasks[1].recur)
+    end)
+
+    it('updates recur field when changed inline', function()
+      s:add({ description = 'Task', recur = 'daily' })
+      s:save()
+      local lines = {
+        '# Todo',
+        '/1/- [ ] Task rec:weekly',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('weekly', task.recur)
+    end)
+
+    it('preserves recur when not present in buffer line', function()
+      s:add({ description = 'Task', recur = 'daily' })
+      s:save()
+      local lines = {
+        '# Todo',
+        '/1/- [ ] Task',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('daily', task.recur)
+    end)
+
+    it('parses rec: with completion mode prefix', function()
+      local lines = {
+        '# Inbox',
+        '- [ ] Water plants rec:!weekly',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local tasks = s:active_tasks()
+      assert.are.equal('weekly', tasks[1].recur)
+      assert.are.equal('completion', tasks[1].recur_mode)
     end)
 
     it('clears priority when [N] is removed from buffer line', function()
-      store.add({ description = 'Task name', priority = 1 })
+      s:add({ description = 'Task name', priority = 1 })
-      store.save()
+      s:save()
       local lines = {
-        '## Inbox',
+        '# Inbox',
         '/1/- [ ] Task name',
       }
-      diff.apply(lines)
+      diff.apply(lines, s)
-      store.unload()
+      s:load()
-      store.load()
+      local task = s:get(1)
-      local task = store.get(1)
       assert.are.equal(0, task.priority)
     end)
+
+    it('rejects editing description of a done task', function()
+      local t = s:add({ description = 'Finished work', status = 'done' })
+      t['end'] = '2026-03-01T00:00:00Z'
+      s:save()
+      local lines = {
+        '# Todo',
+        '/1/- [x] Changed description',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('Finished work', task.description)
+      assert.are.equal('done', task.status)
+    end)
+
+    it('allows toggling done task back to pending', function()
+      local t = s:add({ description = 'Finished work', status = 'done' })
+      t['end'] = '2026-03-01T00:00:00Z'
+      s:save()
+      local lines = {
+        '# Todo',
+        '/1/- [ ] Finished work',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('pending', task.status)
+    end)
+
+    it('allows editing done task when lock_done is false', function()
+      local cfg = require('pending.config')
+      vim.g.pending = { lock_done = false }
+      cfg.reset()
+      local t = s:add({ description = 'Finished work', status = 'done' })
+      t['end'] = '2026-03-01T00:00:00Z'
+      s:save()
+      local lines = {
+        '# Todo',
+        '/1/- [x] Changed description',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('Changed description', task.description)
+      vim.g.pending = {}
+      cfg.reset()
+    end)
+
+    it('does not affect editing of pending tasks', function()
+      s:add({ description = 'Active task' })
+      s:save()
+      local lines = {
+        '# Todo',
+        '/1/- [ ] Updated active task',
+      }
+      diff.apply(lines, s)
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('Updated active task', task.description)
+    end)
   end)
 end)

spec/edit_spec.lua

@@ -0,0 +1,329 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+
+describe('edit', function()
+  local tmpdir
+  local pending
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    config.reset()
+    package.loaded['pending'] = nil
+    pending = require('pending')
+    pending.store():load()
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+    package.loaded['pending'] = nil
+  end)
+
+  it('sets due date with resolve_date vocabulary', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'due:tomorrow')
+    local updated = s:get(t.id)
+    local today = os.date('*t') --[[@as osdate]]
+    local expected =
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day + 1 }))
+    assert.are.equal(expected, updated.due)
+  end)
+
+  it('sets due date with literal YYYY-MM-DD', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'due:2026-06-15')
+    local updated = s:get(t.id)
+    assert.are.equal('2026-06-15', updated.due)
+  end)
+
+  it('sets category', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'cat:Work')
+    local updated = s:get(t.id)
+    assert.are.equal('Work', updated.category)
+  end)
+
+  it('adds priority', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), '+!')
+    local updated = s:get(t.id)
+    assert.are.equal(1, updated.priority)
+  end)
+
+  it('removes priority', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one', priority = 1 })
+    s:save()
+    pending.edit(tostring(t.id), '-!')
+    local updated = s:get(t.id)
+    assert.are.equal(0, updated.priority)
+  end)
+
+  it('removes due date', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one', due = '2026-06-15' })
+    s:save()
+    pending.edit(tostring(t.id), '-due')
+    local updated = s:get(t.id)
+    assert.is_nil(updated.due)
+  end)
+
+  it('removes category', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one', category = 'Work' })
+    s:save()
+    pending.edit(tostring(t.id), '-cat')
+    local updated = s:get(t.id)
+    assert.is_nil(updated.category)
+  end)
+
+  it('sets recurrence', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'rec:weekly')
+    local updated = s:get(t.id)
+    assert.are.equal('weekly', updated.recur)
+    assert.is_nil(updated.recur_mode)
+  end)
+
+  it('sets completion-based recurrence', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'rec:!daily')
+    local updated = s:get(t.id)
+    assert.are.equal('daily', updated.recur)
+    assert.are.equal('completion', updated.recur_mode)
+  end)
+
+  it('removes recurrence', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one', recur = 'weekly', recur_mode = 'scheduled' })
+    s:save()
+    pending.edit(tostring(t.id), '-rec')
+    local updated = s:get(t.id)
+    assert.is_nil(updated.recur)
+    assert.is_nil(updated.recur_mode)
+  end)
+
+  it('applies multiple operations at once', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'due:today cat:Errands +!')
+    local updated = s:get(t.id)
+    assert.are.equal(os.date('%Y-%m-%d'), updated.due)
+    assert.are.equal('Errands', updated.category)
+    assert.are.equal(1, updated.priority)
+  end)
+
+  it('pushes to undo stack', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    local stack_before = #s:undo_stack()
+    pending.edit(tostring(t.id), 'cat:Work')
+    assert.are.equal(stack_before + 1, #s:undo_stack())
+  end)
+
+  it('persists changes to disk', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'cat:Work')
+    s:load()
+    local updated = s:get(t.id)
+    assert.are.equal('Work', updated.category)
+  end)
+
+  it('errors on unknown task ID', function()
+    local s = pending.store()
+    s:add({ description = 'Task one' })
+    s:save()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit('999', 'cat:Work')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('No task with ID 999'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('errors on invalid date', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit(tostring(t.id), 'due:notadate')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Invalid date'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('errors on unknown operation token', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit(tostring(t.id), 'bogus')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Unknown operation'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('errors on invalid recurrence pattern', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit(tostring(t.id), 'rec:nope')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Invalid recurrence'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('errors when no operations given', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit(tostring(t.id), '')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Usage'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('errors when no id given', function()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit('', '')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Usage'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('errors on non-numeric id', function()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit('abc', 'cat:Work')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Invalid task ID'))
+    assert.are.equal(vim.log.levels.ERROR, messages[1].level)
+  end)
+
+  it('shows feedback message on success', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    local messages = {}
+    local orig_notify = vim.notify
+    vim.notify = function(msg, level)
+      table.insert(messages, { msg = msg, level = level })
+    end
+    pending.edit(tostring(t.id), 'cat:Work')
+    vim.notify = orig_notify
+    assert.are.equal(1, #messages)
+    assert.truthy(messages[1].msg:find('Task #' .. t.id .. ' updated'))
+    assert.truthy(messages[1].msg:find('category set to Work'))
+  end)
+
+  it('respects custom date_syntax', function()
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json', date_syntax = 'by' }
+    config.reset()
+    package.loaded['pending'] = nil
+    pending = require('pending')
+    local s = pending.store()
+    s:load()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'by:tomorrow')
+    local updated = s:get(t.id)
+    local today = os.date('*t') --[[@as osdate]]
+    local expected =
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day + 1 }))
+    assert.are.equal(expected, updated.due)
+  end)
+
+  it('respects custom recur_syntax', function()
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json', recur_syntax = 'repeat' }
+    config.reset()
+    package.loaded['pending'] = nil
+    pending = require('pending')
+    local s = pending.store()
+    s:load()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'repeat:weekly')
+    local updated = s:get(t.id)
+    assert.are.equal('weekly', updated.recur)
+  end)
+
+  it('does not modify store on error', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one', category = 'Original' })
+    s:save()
+    local orig_notify = vim.notify
+    vim.notify = function() end
+    pending.edit(tostring(t.id), 'due:notadate')
+    vim.notify = orig_notify
+    local updated = s:get(t.id)
+    assert.are.equal('Original', updated.category)
+    assert.is_nil(updated.due)
+  end)
+
+  it('sets due date with datetime format', function()
+    local s = pending.store()
+    local t = s:add({ description = 'Task one' })
+    s:save()
+    pending.edit(tostring(t.id), 'due:tomorrow@14:00')
+    local updated = s:get(t.id)
+    local today = os.date('*t') --[[@as osdate]]
+    local expected =
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day + 1 }))
+    assert.are.equal(expected .. 'T14:00', updated.due)
+  end)
+end)

spec/filter_spec.lua

@@ -0,0 +1,292 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+local diff = require('pending.diff')
+
+describe('filter', function()
+  local tmpdir
+  local pending
+  local buffer
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    config.reset()
+    package.loaded['pending'] = nil
+    package.loaded['pending.buffer'] = nil
+    pending = require('pending')
+    buffer = require('pending.buffer')
+    buffer.set_filter({}, {})
+    pending.store():load()
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+    package.loaded['pending'] = nil
+    package.loaded['pending.buffer'] = nil
+  end)
+
+  describe('filter predicates', function()
+    it('cat: hides tasks with non-matching category', function()
+      local s = pending.store()
+      s:add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Home task', category = 'Home' })
+      s:save()
+      pending.filter('cat:Work')
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local work_task = nil
+      local home_task = nil
+      for _, t in ipairs(tasks) do
+        if t.category == 'Work' then
+          work_task = t
+        end
+        if t.category == 'Home' then
+          home_task = t
+        end
+      end
+      assert.is_not_nil(work_task)
+      assert.is_not_nil(home_task)
+      assert.is_nil(hidden[work_task.id])
+      assert.is_true(hidden[home_task.id])
+    end)
+
+    it('cat: hides tasks with no category (default category)', function()
+      local s = pending.store()
+      s:add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Inbox task' })
+      s:save()
+      pending.filter('cat:Work')
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local inbox_task = nil
+      for _, t in ipairs(tasks) do
+        if t.category ~= 'Work' then
+          inbox_task = t
+        end
+      end
+      assert.is_not_nil(inbox_task)
+      assert.is_true(hidden[inbox_task.id])
+    end)
+
+    it('overdue hides non-overdue tasks', function()
+      local s = pending.store()
+      s:add({ description = 'Old task', due = '2020-01-01' })
+      s:add({ description = 'Future task', due = '2099-01-01' })
+      s:add({ description = 'No due task' })
+      s:save()
+      pending.filter('overdue')
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local overdue_task, future_task, nodue_task
+      for _, t in ipairs(tasks) do
+        if t.due == '2020-01-01' then
+          overdue_task = t
+        end
+        if t.due == '2099-01-01' then
+          future_task = t
+        end
+        if not t.due then
+          nodue_task = t
+        end
+      end
+      assert.is_nil(hidden[overdue_task.id])
+      assert.is_true(hidden[future_task.id])
+      assert.is_true(hidden[nodue_task.id])
+    end)
+
+    it('today hides non-today tasks', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Today task', due = today })
+      s:add({ description = 'Old task', due = '2020-01-01' })
+      s:add({ description = 'Future task', due = '2099-01-01' })
+      s:save()
+      pending.filter('today')
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local today_task, old_task, future_task
+      for _, t in ipairs(tasks) do
+        if t.due == today then
+          today_task = t
+        end
+        if t.due == '2020-01-01' then
+          old_task = t
+        end
+        if t.due == '2099-01-01' then
+          future_task = t
+        end
+      end
+      assert.is_nil(hidden[today_task.id])
+      assert.is_true(hidden[old_task.id])
+      assert.is_true(hidden[future_task.id])
+    end)
+
+    it('priority hides non-priority tasks', function()
+      local s = pending.store()
+      s:add({ description = 'Important', priority = 1 })
+      s:add({ description = 'Normal' })
+      s:save()
+      pending.filter('priority')
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local important_task, normal_task
+      for _, t in ipairs(tasks) do
+        if t.priority and t.priority > 0 then
+          important_task = t
+        end
+        if not t.priority or t.priority == 0 then
+          normal_task = t
+        end
+      end
+      assert.is_nil(hidden[important_task.id])
+      assert.is_true(hidden[normal_task.id])
+    end)
+
+    it('multi-predicate AND: cat:Work + overdue', function()
+      local s = pending.store()
+      s:add({ description = 'Work overdue', category = 'Work', due = '2020-01-01' })
+      s:add({ description = 'Work future', category = 'Work', due = '2099-01-01' })
+      s:add({ description = 'Home overdue', category = 'Home', due = '2020-01-01' })
+      s:save()
+      pending.filter('cat:Work overdue')
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local work_overdue, work_future, home_overdue
+      for _, t in ipairs(tasks) do
+        if t.description == 'Work overdue' then
+          work_overdue = t
+        end
+        if t.description == 'Work future' then
+          work_future = t
+        end
+        if t.description == 'Home overdue' then
+          home_overdue = t
+        end
+      end
+      assert.is_nil(hidden[work_overdue.id])
+      assert.is_true(hidden[work_future.id])
+      assert.is_true(hidden[home_overdue.id])
+    end)
+
+    it('filter clear removes all predicates and hidden ids', function()
+      local s = pending.store()
+      s:add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Home task', category = 'Home' })
+      s:save()
+      pending.filter('cat:Work')
+      assert.are.equal(1, #buffer.filter_predicates())
+      pending.filter('clear')
+      assert.are.equal(0, #buffer.filter_predicates())
+      assert.are.same({}, buffer.hidden_ids())
+    end)
+
+    it('filter empty string clears filter', function()
+      local s = pending.store()
+      s:add({ description = 'Work task', category = 'Work' })
+      s:save()
+      pending.filter('cat:Work')
+      assert.are.equal(1, #buffer.filter_predicates())
+      pending.filter('')
+      assert.are.equal(0, #buffer.filter_predicates())
+    end)
+
+    it('filter predicates persist across set_filter calls', function()
+      local s = pending.store()
+      s:add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Home task', category = 'Home' })
+      s:save()
+      pending.filter('cat:Work')
+      local preds = buffer.filter_predicates()
+      assert.are.equal(1, #preds)
+      assert.are.equal('cat:Work', preds[1])
+      local hidden = buffer.hidden_ids()
+      local tasks = s:active_tasks()
+      local home_task
+      for _, t in ipairs(tasks) do
+        if t.category == 'Home' then
+          home_task = t
+        end
+      end
+      assert.is_true(hidden[home_task.id])
+    end)
+  end)
+
+  describe('diff.apply with hidden_ids', function()
+    it('does not mark hidden tasks as deleted', function()
+      local s = pending.store()
+      s:add({ description = 'Visible task' })
+      s:add({ description = 'Hidden task' })
+      s:save()
+      local tasks = s:active_tasks()
+      local hidden_task
+      for _, t in ipairs(tasks) do
+        if t.description == 'Hidden task' then
+          hidden_task = t
+        end
+      end
+      local hidden_ids = { [hidden_task.id] = true }
+      local lines = {
+        '/1/- [ ] Visible task',
+      }
+      diff.apply(lines, s, hidden_ids)
+      s:load()
+      local hidden = s:get(hidden_task.id)
+      assert.are.equal('pending', hidden.status)
+    end)
+
+    it('marks tasks deleted when not hidden and not in buffer', function()
+      local s = pending.store()
+      s:add({ description = 'Keep task' })
+      s:add({ description = 'Delete task' })
+      s:save()
+      local tasks = s:active_tasks()
+      local keep_task, delete_task
+      for _, t in ipairs(tasks) do
+        if t.description == 'Keep task' then
+          keep_task = t
+        end
+        if t.description == 'Delete task' then
+          delete_task = t
+        end
+      end
+      local lines = {
+        '/' .. keep_task.id .. '/- [ ] Keep task',
+      }
+      diff.apply(lines, s, {})
+      s:load()
+      local deleted = s:get(delete_task.id)
+      assert.are.equal('deleted', deleted.status)
+    end)
+
+    it('strips FILTER: line before parsing', function()
+      local s = pending.store()
+      s:add({ description = 'My task' })
+      s:save()
+      local tasks = s:active_tasks()
+      local task = tasks[1]
+      local lines = {
+        'FILTER: cat:Work',
+        '/' .. task.id .. '/- [ ] My task',
+      }
+      diff.apply(lines, s, {})
+      s:load()
+      local t = s:get(task.id)
+      assert.are.equal('pending', t.status)
+    end)
+
+    it('parse_buffer skips FILTER: header line', function()
+      local lines = {
+        'FILTER: overdue',
+        '/1/- [ ] A task',
+      }
+      local result = diff.parse_buffer(lines)
+      assert.are.equal(1, #result)
+      assert.are.equal('task', result[1].type)
+      assert.are.equal('A task', result[1].description)
+    end)
+  end)
+end)

spec/forge_spec.lua

@@ -0,0 +1,452 @@
+require('spec.helpers')
+
+local forge = require('pending.forge')
+
+describe('forge', function()
+  describe('_parse_shorthand', function()
+    it('parses gh: shorthand', function()
+      local ref = forge._parse_shorthand('gh:user/repo#42')
+      assert.is_not_nil(ref)
+      assert.equals('github', ref.forge)
+      assert.equals('user', ref.owner)
+      assert.equals('repo', ref.repo)
+      assert.equals('issue', ref.type)
+      assert.equals(42, ref.number)
+      assert.equals('https://github.com/user/repo/issues/42', ref.url)
+    end)
+
+    it('parses gl: shorthand', function()
+      local ref = forge._parse_shorthand('gl:group/project#15')
+      assert.is_not_nil(ref)
+      assert.equals('gitlab', ref.forge)
+      assert.equals('group', ref.owner)
+      assert.equals('project', ref.repo)
+      assert.equals(15, ref.number)
+    end)
+
+    it('parses cb: shorthand', function()
+      local ref = forge._parse_shorthand('cb:user/repo#3')
+      assert.is_not_nil(ref)
+      assert.equals('codeberg', ref.forge)
+      assert.equals('user', ref.owner)
+      assert.equals('repo', ref.repo)
+      assert.equals(3, ref.number)
+    end)
+
+    it('handles hyphens and dots in owner/repo', function()
+      local ref = forge._parse_shorthand('gh:my-org/my.repo#100')
+      assert.is_not_nil(ref)
+      assert.equals('my-org', ref.owner)
+      assert.equals('my.repo', ref.repo)
+    end)
+
+    it('rejects invalid prefix', function()
+      assert.is_nil(forge._parse_shorthand('xx:user/repo#1'))
+    end)
+
+    it('rejects missing number', function()
+      assert.is_nil(forge._parse_shorthand('gh:user/repo'))
+    end)
+
+    it('rejects missing repo', function()
+      assert.is_nil(forge._parse_shorthand('gh:user#1'))
+    end)
+  end)
+
+  describe('_parse_github_url', function()
+    it('parses issue URL', function()
+      local ref = forge._parse_github_url('https://github.com/user/repo/issues/42')
+      assert.is_not_nil(ref)
+      assert.equals('github', ref.forge)
+      assert.equals('user', ref.owner)
+      assert.equals('repo', ref.repo)
+      assert.equals('issue', ref.type)
+      assert.equals(42, ref.number)
+    end)
+
+    it('parses pull request URL', function()
+      local ref = forge._parse_github_url('https://github.com/user/repo/pull/10')
+      assert.is_not_nil(ref)
+      assert.equals('pull_request', ref.type)
+    end)
+
+    it('rejects non-github URL', function()
+      assert.is_nil(forge._parse_github_url('https://example.com/user/repo/issues/1'))
+    end)
+  end)
+
+  describe('_parse_gitlab_url', function()
+    it('parses issue URL', function()
+      local ref = forge._parse_gitlab_url('https://gitlab.com/group/project/-/issues/15')
+      assert.is_not_nil(ref)
+      assert.equals('gitlab', ref.forge)
+      assert.equals('group', ref.owner)
+      assert.equals('project', ref.repo)
+      assert.equals('issue', ref.type)
+      assert.equals(15, ref.number)
+    end)
+
+    it('parses merge request URL', function()
+      local ref = forge._parse_gitlab_url('https://gitlab.com/group/project/-/merge_requests/5')
+      assert.is_not_nil(ref)
+      assert.equals('merge_request', ref.type)
+    end)
+
+    it('handles nested groups', function()
+      local ref = forge._parse_gitlab_url('https://gitlab.com/org/sub/project/-/issues/1')
+      assert.is_not_nil(ref)
+      assert.equals('org/sub', ref.owner)
+      assert.equals('project', ref.repo)
+    end)
+  end)
+
+  describe('_parse_codeberg_url', function()
+    it('parses issue URL', function()
+      local ref = forge._parse_codeberg_url('https://codeberg.org/user/repo/issues/3')
+      assert.is_not_nil(ref)
+      assert.equals('codeberg', ref.forge)
+      assert.equals('user', ref.owner)
+      assert.equals('repo', ref.repo)
+      assert.equals('issue', ref.type)
+      assert.equals(3, ref.number)
+    end)
+
+    it('parses pull URL', function()
+      local ref = forge._parse_codeberg_url('https://codeberg.org/user/repo/pulls/7')
+      assert.is_not_nil(ref)
+      assert.equals('pull_request', ref.type)
+    end)
+  end)
+
+  describe('parse_ref', function()
+    it('dispatches shorthand', function()
+      local ref = forge.parse_ref('gh:user/repo#1')
+      assert.is_not_nil(ref)
+      assert.equals('github', ref.forge)
+    end)
+
+    it('dispatches GitHub URL', function()
+      local ref = forge.parse_ref('https://github.com/user/repo/issues/1')
+      assert.is_not_nil(ref)
+      assert.equals('github', ref.forge)
+    end)
+
+    it('dispatches GitLab URL', function()
+      local ref = forge.parse_ref('https://gitlab.com/group/project/-/issues/1')
+      assert.is_not_nil(ref)
+      assert.equals('gitlab', ref.forge)
+    end)
+
+    it('returns nil for non-forge token', function()
+      assert.is_nil(forge.parse_ref('hello'))
+      assert.is_nil(forge.parse_ref('due:tomorrow'))
+    end)
+  end)
+
+  describe('find_refs', function()
+    it('finds a single shorthand ref', function()
+      local refs = forge.find_refs('Fix bug gh:user/repo#42')
+      assert.equals(1, #refs)
+      assert.equals('github', refs[1].ref.forge)
+      assert.equals(42, refs[1].ref.number)
+      assert.equals('gh:user/repo#42', refs[1].raw)
+      assert.equals(8, refs[1].start_byte)
+      assert.equals(23, refs[1].end_byte)
+    end)
+
+    it('finds multiple refs', function()
+      local refs = forge.find_refs('Fix gh:a/b#1 gh:c/d#2')
+      assert.equals(2, #refs)
+      assert.equals('a', refs[1].ref.owner)
+      assert.equals('c', refs[2].ref.owner)
+    end)
+
+    it('finds full URL refs', function()
+      local refs = forge.find_refs('Fix https://github.com/user/repo/issues/10')
+      assert.equals(1, #refs)
+      assert.equals('github', refs[1].ref.forge)
+      assert.equals(10, refs[1].ref.number)
+    end)
+
+    it('returns empty for no refs', function()
+      local refs = forge.find_refs('Fix the bug')
+      assert.equals(0, #refs)
+    end)
+
+    it('skips invalid forge-like tokens', function()
+      local refs = forge.find_refs('Fix the gh: prefix handling')
+      assert.equals(0, #refs)
+    end)
+
+    it('records correct byte offsets', function()
+      local refs = forge.find_refs('gh:a/b#1')
+      assert.equals(1, #refs)
+      assert.equals(0, refs[1].start_byte)
+      assert.equals(8, refs[1].end_byte)
+    end)
+  end)
+
+  describe('_api_args', function()
+    it('builds GitHub CLI args', function()
+      local args = forge._api_args({
+        forge = 'github',
+        owner = 'user',
+        repo = 'repo',
+        type = 'issue',
+        number = 42,
+        url = '',
+      })
+      assert.same({ 'gh', 'api', '/repos/user/repo/issues/42' }, args)
+    end)
+
+    it('builds GitLab CLI args for issue', function()
+      local args = forge._api_args({
+        forge = 'gitlab',
+        owner = 'group',
+        repo = 'project',
+        type = 'issue',
+        number = 15,
+        url = '',
+      })
+      assert.same({ 'glab', 'api', '/projects/group%2Fproject/issues/15' }, args)
+    end)
+
+    it('builds GitLab CLI args for merge request', function()
+      local args = forge._api_args({
+        forge = 'gitlab',
+        owner = 'group',
+        repo = 'project',
+        type = 'merge_request',
+        number = 5,
+        url = '',
+      })
+      assert.same({ 'glab', 'api', '/projects/group%2Fproject/merge_requests/5' }, args)
+    end)
+
+    it('builds Codeberg CLI args', function()
+      local args = forge._api_args({
+        forge = 'codeberg',
+        owner = 'user',
+        repo = 'repo',
+        type = 'issue',
+        number = 3,
+        url = '',
+      })
+      assert.same({ 'tea', 'api', '/repos/user/repo/issues/3' }, args)
+    end)
+  end)
+
+  describe('format_label', function()
+    it('formats with default format', function()
+      local text, hl = forge.format_label({
+        forge = 'github',
+        owner = 'user',
+        repo = 'repo',
+        type = 'issue',
+        number = 42,
+        url = '',
+      }, nil)
+      assert.truthy(text:find('user/repo#42'))
+      assert.equals('PendingForge', hl)
+    end)
+
+    it('uses closed highlight for closed state', function()
+      local _, hl = forge.format_label({
+        forge = 'github',
+        owner = 'user',
+        repo = 'repo',
+        type = 'issue',
+        number = 42,
+        url = '',
+      }, { state = 'closed', fetched_at = '2026-01-01T00:00:00Z' })
+      assert.equals('PendingForgeClosed', hl)
+    end)
+
+    it('uses closed highlight for merged state', function()
+      local _, hl = forge.format_label({
+        forge = 'gitlab',
+        owner = 'group',
+        repo = 'project',
+        type = 'merge_request',
+        number = 5,
+        url = '',
+      }, { state = 'merged', fetched_at = '2026-01-01T00:00:00Z' })
+      assert.equals('PendingForgeClosed', hl)
+    end)
+  end)
+end)
+
+describe('forge parse.body integration', function()
+  local parse = require('pending.parse')
+
+  it('keeps gh: shorthand in description', function()
+    local desc, meta = parse.body('Fix login bug gh:user/repo#42')
+    assert.equals('Fix login bug gh:user/repo#42', desc)
+    assert.is_nil(meta.forge_ref)
+  end)
+
+  it('keeps gl: shorthand in description', function()
+    local desc, meta = parse.body('Update docs gl:group/project#15')
+    assert.equals('Update docs gl:group/project#15', desc)
+    assert.is_nil(meta.forge_ref)
+  end)
+
+  it('keeps GitHub URL in description', function()
+    local desc, meta = parse.body('Fix bug https://github.com/user/repo/issues/10')
+    assert.equals('Fix bug https://github.com/user/repo/issues/10', desc)
+    assert.is_nil(meta.forge_ref)
+  end)
+
+  it('extracts due date but keeps forge ref in description', function()
+    local desc, meta = parse.body('Fix bug gh:user/repo#42 due:tomorrow')
+    assert.equals('Fix bug gh:user/repo#42', desc)
+    assert.is_not_nil(meta.due)
+  end)
+
+  it('extracts category but keeps forge ref in description', function()
+    local desc, meta = parse.body('Fix bug gh:user/repo#42 cat:Work')
+    assert.equals('Fix bug gh:user/repo#42', desc)
+    assert.equals('Work', meta.cat)
+  end)
+
+  it('leaves non-forge tokens as description', function()
+    local desc, meta = parse.body('Fix the gh: prefix handling')
+    assert.equals('Fix the gh: prefix handling', desc)
+    assert.is_nil(meta.forge_ref)
+  end)
+end)
+
+describe('forge registry', function()
+  it('backends() returns all registered backends', function()
+    local backends = forge.backends()
+    assert.is_true(#backends >= 3)
+    local names = {}
+    for _, b in ipairs(backends) do
+      names[b.name] = true
+    end
+    assert.is_true(names['github'])
+    assert.is_true(names['gitlab'])
+    assert.is_true(names['codeberg'])
+  end)
+
+  it('register() with custom backend resolves URLs', function()
+    local custom = forge.gitea_backend({
+      name = 'mygitea',
+      shorthand = 'mg',
+      default_host = 'gitea.example.com',
+    })
+    forge.register(custom)
+
+    local ref = forge.parse_ref('https://gitea.example.com/alice/proj/issues/7')
+    assert.is_not_nil(ref)
+    assert.equals('mygitea', ref.forge)
+    assert.equals('alice', ref.owner)
+    assert.equals('proj', ref.repo)
+    assert.equals('issue', ref.type)
+    assert.equals(7, ref.number)
+  end)
+
+  it('register() with custom shorthand resolves', function()
+    local ref = forge._parse_shorthand('mg:alice/proj#7')
+    assert.is_not_nil(ref)
+    assert.equals('mygitea', ref.forge)
+    assert.equals('alice', ref.owner)
+    assert.equals('proj', ref.repo)
+    assert.equals(7, ref.number)
+  end)
+
+  it('_api_args dispatches to custom backend', function()
+    local args = forge._api_args({
+      forge = 'mygitea',
+      owner = 'alice',
+      repo = 'proj',
+      type = 'issue',
+      number = 7,
+      url = '',
+    })
+    assert.same({ 'tea', 'api', '/repos/alice/proj/issues/7' }, args)
+  end)
+
+  it('gitea_backend() creates a working backend', function()
+    local b = forge.gitea_backend({
+      name = 'forgejo',
+      shorthand = 'fj',
+      default_host = 'forgejo.example.com',
+      cli = 'forgejo-cli',
+      auth_cmd = 'forgejo-cli login',
+    })
+    assert.equals('forgejo', b.name)
+    assert.equals('fj', b.shorthand)
+    assert.equals('forgejo-cli', b.cli)
+
+    local ref = b:parse_url('https://forgejo.example.com/bob/repo/pulls/3')
+    assert.is_nil(ref)
+
+    forge.register(b)
+    ref = b:parse_url('https://forgejo.example.com/bob/repo/pulls/3')
+    assert.is_not_nil(ref)
+    assert.equals('forgejo', ref.forge)
+    assert.equals('pull_request', ref.type)
+    assert.equals(3, ref.number)
+  end)
+end)
+
+describe('forge diff integration', function()
+  local store = require('pending.store')
+  local diff = require('pending.diff')
+
+  it('stores forge_ref in _extra on new task', function()
+    local tmp = os.tmpname()
+    local s = store.new(tmp)
+    s:load()
+    diff.apply({ '- [ ] Fix bug gh:user/repo#42' }, s)
+    local tasks = s:active_tasks()
+    assert.equals(1, #tasks)
+    assert.equals('Fix bug gh:user/repo#42', tasks[1].description)
+    assert.is_not_nil(tasks[1]._extra)
+    assert.is_not_nil(tasks[1]._extra._forge_ref)
+    assert.equals('github', tasks[1]._extra._forge_ref.forge)
+    assert.equals(42, tasks[1]._extra._forge_ref.number)
+    os.remove(tmp)
+  end)
+
+  it('stores forge_ref in _extra on existing task', function()
+    local tmp = os.tmpname()
+    local s = store.new(tmp)
+    s:load()
+    local task = s:add({ description = 'Fix bug' })
+    s:save()
+    diff.apply({ '/' .. task.id .. '/- [ ] Fix bug gh:user/repo#10' }, s)
+    local updated = s:get(task.id)
+    assert.equals('Fix bug gh:user/repo#10', updated.description)
+    assert.is_not_nil(updated._extra)
+    assert.is_not_nil(updated._extra._forge_ref)
+    assert.equals(10, updated._extra._forge_ref.number)
+    os.remove(tmp)
+  end)
+
+  it('preserves existing forge_ref when not in parsed line', function()
+    local tmp = os.tmpname()
+    local s = store.new(tmp)
+    s:load()
+    local task = s:add({
+      description = 'Fix bug',
+      _extra = {
+        _forge_ref = {
+          forge = 'github',
+          owner = 'a',
+          repo = 'b',
+          type = 'issue',
+          number = 1,
+          url = '',
+        },
+      },
+    })
+    s:save()
+    diff.apply({ '/' .. task.id .. '/- [ ] Fix bug' }, s)
+    local updated = s:get(task.id)
+    assert.is_not_nil(updated._extra._forge_ref)
+    assert.equals(1, updated._extra._forge_ref.number)
+    os.remove(tmp)
+  end)
+end)

spec/gtasks_spec.lua

@@ -0,0 +1,368 @@
+require('spec.helpers')
+
+local gtasks = require('pending.sync.gtasks')
+
+describe('gtasks field conversion', function()
+  describe('due date helpers', function()
+    it('converts date-only to RFC 3339', function()
+      assert.equals('2026-03-15T00:00:00.000Z', gtasks._due_to_rfc3339('2026-03-15'))
+    end)
+
+    it('converts datetime to RFC 3339 (strips time)', function()
+      assert.equals('2026-03-15T00:00:00.000Z', gtasks._due_to_rfc3339('2026-03-15T14:30'))
+    end)
+
+    it('strips RFC 3339 to date-only', function()
+      assert.equals('2026-03-15', gtasks._rfc3339_to_date('2026-03-15T00:00:00.000Z'))
+    end)
+  end)
+
+  describe('build_notes', function()
+    it('returns nil when no priority or recur', function()
+      assert.is_nil(gtasks._build_notes({ priority = 0, recur = nil }))
+    end)
+
+    it('encodes priority', function()
+      assert.equals('pri:1', gtasks._build_notes({ priority = 1, recur = nil }))
+    end)
+
+    it('encodes recur', function()
+      assert.equals('rec:weekly', gtasks._build_notes({ priority = 0, recur = 'weekly' }))
+    end)
+
+    it('encodes completion-mode recur with ! prefix', function()
+      assert.equals(
+        'rec:!daily',
+        gtasks._build_notes({ priority = 0, recur = 'daily', recur_mode = 'completion' })
+      )
+    end)
+
+    it('encodes both priority and recur', function()
+      assert.equals('pri:1 rec:weekly', gtasks._build_notes({ priority = 1, recur = 'weekly' }))
+    end)
+  end)
+
+  describe('parse_notes', function()
+    it('returns zeros/nils for nil input', function()
+      local pri, rec, mode = gtasks._parse_notes(nil)
+      assert.equals(0, pri)
+      assert.is_nil(rec)
+      assert.is_nil(mode)
+    end)
+
+    it('parses priority', function()
+      local pri = gtasks._parse_notes('pri:1')
+      assert.equals(1, pri)
+    end)
+
+    it('parses recur', function()
+      local _, rec = gtasks._parse_notes('rec:weekly')
+      assert.equals('weekly', rec)
+    end)
+
+    it('parses completion-mode recur', function()
+      local _, rec, mode = gtasks._parse_notes('rec:!daily')
+      assert.equals('daily', rec)
+      assert.equals('completion', mode)
+    end)
+
+    it('parses both priority and recur', function()
+      local pri, rec = gtasks._parse_notes('pri:1 rec:monthly')
+      assert.equals(1, pri)
+      assert.equals('monthly', rec)
+    end)
+
+    it('round-trips through build_notes', function()
+      local task = { priority = 1, recur = 'weekly', recur_mode = nil }
+      local notes = gtasks._build_notes(task)
+      local pri, rec = gtasks._parse_notes(notes)
+      assert.equals(1, pri)
+      assert.equals('weekly', rec)
+    end)
+  end)
+
+  describe('task_to_gtask', function()
+    it('maps description to title', function()
+      local body = gtasks._task_to_gtask({
+        description = 'Buy milk',
+        status = 'pending',
+        priority = 0,
+      })
+      assert.equals('Buy milk', body.title)
+    end)
+
+    it('maps pending status to needsAction', function()
+      local body = gtasks._task_to_gtask({ description = 'x', status = 'pending', priority = 0 })
+      assert.equals('needsAction', body.status)
+    end)
+
+    it('maps done status to completed', function()
+      local body = gtasks._task_to_gtask({ description = 'x', status = 'done', priority = 0 })
+      assert.equals('completed', body.status)
+    end)
+
+    it('converts due date to RFC 3339', function()
+      local body = gtasks._task_to_gtask({
+        description = 'x',
+        status = 'pending',
+        priority = 0,
+        due = '2026-03-15',
+      })
+      assert.equals('2026-03-15T00:00:00.000Z', body.due)
+    end)
+
+    it('omits due when nil', function()
+      local body = gtasks._task_to_gtask({ description = 'x', status = 'pending', priority = 0 })
+      assert.is_nil(body.due)
+    end)
+
+    it('includes notes when priority is set', function()
+      local body = gtasks._task_to_gtask({ description = 'x', status = 'pending', priority = 1 })
+      assert.equals('pri:1', body.notes)
+    end)
+
+    it('omits notes when no extra fields', function()
+      local body = gtasks._task_to_gtask({ description = 'x', status = 'pending', priority = 0 })
+      assert.is_nil(body.notes)
+    end)
+  end)
+
+  describe('gtask_to_fields', function()
+    it('maps title to description', function()
+      local fields = gtasks._gtask_to_fields({ title = 'Buy milk', status = 'needsAction' }, 'Work')
+      assert.equals('Buy milk', fields.description)
+    end)
+
+    it('maps category from list name', function()
+      local fields = gtasks._gtask_to_fields({ title = 'x', status = 'needsAction' }, 'Personal')
+      assert.equals('Personal', fields.category)
+    end)
+
+    it('maps needsAction to pending', function()
+      local fields = gtasks._gtask_to_fields({ title = 'x', status = 'needsAction' }, 'Work')
+      assert.equals('pending', fields.status)
+    end)
+
+    it('maps completed to done', function()
+      local fields = gtasks._gtask_to_fields({ title = 'x', status = 'completed' }, 'Work')
+      assert.equals('done', fields.status)
+    end)
+
+    it('strips due date to YYYY-MM-DD', function()
+      local fields = gtasks._gtask_to_fields({
+        title = 'x',
+        status = 'needsAction',
+        due = '2026-03-15T00:00:00.000Z',
+      }, 'Work')
+      assert.equals('2026-03-15', fields.due)
+    end)
+
+    it('parses priority from notes', function()
+      local fields = gtasks._gtask_to_fields({
+        title = 'x',
+        status = 'needsAction',
+        notes = 'pri:1',
+      }, 'Work')
+      assert.equals(1, fields.priority)
+    end)
+
+    it('parses recur from notes', function()
+      local fields = gtasks._gtask_to_fields({
+        title = 'x',
+        status = 'needsAction',
+        notes = 'rec:weekly',
+      }, 'Work')
+      assert.equals('weekly', fields.recur)
+    end)
+  end)
+end)
+
+describe('gtasks push_pass _gtasks_synced_at', function()
+  local helpers = require('spec.helpers')
+  local store_mod = require('pending.store')
+  local oauth = require('pending.sync.oauth')
+  local s
+  local orig_curl
+
+  before_each(function()
+    local dir = helpers.tmpdir()
+    s = store_mod.new(dir .. '/pending.json')
+    s:load()
+    orig_curl = oauth.curl_request
+  end)
+
+  after_each(function()
+    oauth.curl_request = orig_curl
+  end)
+
+  it('sets _gtasks_synced_at after push create', function()
+    local task =
+      s:add({ description = 'New task', status = 'pending', category = 'Work', priority = 0 })
+
+    oauth.curl_request = function(method, url, _headers, _body)
+      if method == 'POST' and url:find('/tasks$') then
+        return { id = 'gtask-new-1' }, nil
+      end
+      return {}, nil
+    end
+
+    local now_ts = '2026-03-05T10:00:00Z'
+    local tasklists = { Work = 'list-1' }
+    local by_id = {}
+    gtasks._push_pass('fake-token', tasklists, s, now_ts, by_id)
+
+    assert.is_not_nil(task._extra)
+    assert.equals('2026-03-05T10:00:00Z', task._extra['_gtasks_synced_at'])
+  end)
+
+  it('skips update when modified <= _gtasks_synced_at', function()
+    local task =
+      s:add({ description = 'Existing task', status = 'pending', category = 'Work', priority = 0 })
+    task._extra = {
+      _gtasks_task_id = 'remote-1',
+      _gtasks_list_id = 'list-1',
+      _gtasks_synced_at = '2026-03-05T10:00:00Z',
+    }
+    task.modified = '2026-03-05T09:00:00Z'
+
+    local patch_called = false
+    oauth.curl_request = function(method, _url, _headers, _body)
+      if method == 'PATCH' then
+        patch_called = true
+      end
+      return {}, nil
+    end
+
+    local now_ts = '2026-03-05T11:00:00Z'
+    local tasklists = { Work = 'list-1' }
+    local by_id = { ['remote-1'] = task }
+    gtasks._push_pass('fake-token', tasklists, s, now_ts, by_id)
+
+    assert.is_false(patch_called)
+  end)
+
+  it('pushes update when modified > _gtasks_synced_at', function()
+    local task =
+      s:add({ description = 'Changed task', status = 'pending', category = 'Work', priority = 0 })
+    task._extra = {
+      _gtasks_task_id = 'remote-2',
+      _gtasks_list_id = 'list-1',
+      _gtasks_synced_at = '2026-03-05T08:00:00Z',
+    }
+    task.modified = '2026-03-05T09:00:00Z'
+
+    local patch_called = false
+    oauth.curl_request = function(method, _url, _headers, _body)
+      if method == 'PATCH' then
+        patch_called = true
+      end
+      return {}, nil
+    end
+
+    local now_ts = '2026-03-05T11:00:00Z'
+    local tasklists = { Work = 'list-1' }
+    local by_id = { ['remote-2'] = task }
+    gtasks._push_pass('fake-token', tasklists, s, now_ts, by_id)
+
+    assert.is_true(patch_called)
+  end)
+
+  it('pushes update when no _gtasks_synced_at (backwards compat)', function()
+    local task =
+      s:add({ description = 'Old task', status = 'pending', category = 'Work', priority = 0 })
+    task._extra = {
+      _gtasks_task_id = 'remote-3',
+      _gtasks_list_id = 'list-1',
+    }
+    task.modified = '2026-01-01T00:00:00Z'
+
+    local patch_called = false
+    oauth.curl_request = function(method, _url, _headers, _body)
+      if method == 'PATCH' then
+        patch_called = true
+      end
+      return {}, nil
+    end
+
+    local now_ts = '2026-03-05T11:00:00Z'
+    local tasklists = { Work = 'list-1' }
+    local by_id = { ['remote-3'] = task }
+    gtasks._push_pass('fake-token', tasklists, s, now_ts, by_id)
+
+    assert.is_true(patch_called)
+  end)
+end)
+
+describe('gtasks detect_remote_deletions', function()
+  local helpers = require('spec.helpers')
+  local store_mod = require('pending.store')
+  local s
+
+  before_each(function()
+    local dir = helpers.tmpdir()
+    s = store_mod.new(dir .. '/pending.json')
+    s:load()
+  end)
+
+  it('clears remote IDs when list was fetched but task ID is absent', function()
+    local task =
+      s:add({ description = 'Gone remote', status = 'pending', category = 'Work', priority = 0 })
+    task._extra = {
+      _gtasks_task_id = 'old-remote-id',
+      _gtasks_list_id = 'list-1',
+      _gtasks_synced_at = '2026-01-01T00:00:00Z',
+    }
+
+    local seen = {}
+    local fetched = { ['list-1'] = true }
+    local now_ts = '2026-03-05T10:00:00Z'
+
+    local unlinked = gtasks._detect_remote_deletions(s, seen, fetched, now_ts)
+
+    assert.equals(1, unlinked)
+    assert.is_nil(task._extra)
+    assert.equals('2026-03-05T10:00:00Z', task.modified)
+  end)
+
+  it('leaves task untouched when its list fetch failed', function()
+    local task = s:add({
+      description = 'Unknown list task',
+      status = 'pending',
+      category = 'Work',
+      priority = 0,
+    })
+    task._extra = {
+      _gtasks_task_id = 'remote-id',
+      _gtasks_list_id = 'list-unfetched',
+    }
+
+    local seen = {}
+    local fetched = {}
+    local now_ts = '2026-03-05T10:00:00Z'
+
+    local unlinked = gtasks._detect_remote_deletions(s, seen, fetched, now_ts)
+
+    assert.equals(0, unlinked)
+    assert.is_not_nil(task._extra)
+    assert.equals('remote-id', task._extra['_gtasks_task_id'])
+  end)
+
+  it('skips tasks with status == deleted', function()
+    local task =
+      s:add({ description = 'Deleted task', status = 'deleted', category = 'Work', priority = 0 })
+    task._extra = {
+      _gtasks_task_id = 'remote-del',
+      _gtasks_list_id = 'list-1',
+    }
+
+    local seen = {}
+    local fetched = { ['list-1'] = true }
+    local now_ts = '2026-03-05T10:00:00Z'
+
+    local unlinked = gtasks._detect_remote_deletions(s, seen, fetched, now_ts)
+
+    assert.equals(0, unlinked)
+    assert.is_not_nil(task._extra)
+    assert.equals('remote-del', task._extra['_gtasks_task_id'])
+  end)
+end)

spec/icons_spec.lua

@@ -0,0 +1,56 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+
+describe('icons', function()
+  before_each(function()
+    vim.g.pending = nil
+    config.reset()
+  end)
+
+  after_each(function()
+    vim.g.pending = nil
+    config.reset()
+  end)
+
+  it('has default icon values', function()
+    local icons = config.get().icons
+    assert.equals(' ', icons.pending)
+    assert.equals('x', icons.done)
+    assert.equals('!', icons.priority)
+    assert.equals('.', icons.due)
+    assert.equals('~', icons.recur)
+    assert.equals('#', icons.category)
+  end)
+
+  it('allows overriding individual icons', function()
+    vim.g.pending = { icons = { pending = '*', done = '+' } }
+    config.reset()
+    local icons = config.get().icons
+    assert.equals('*', icons.pending)
+    assert.equals('+', icons.done)
+    assert.equals('!', icons.priority)
+    assert.equals('#', icons.category)
+  end)
+
+  it('allows overriding all icons', function()
+    vim.g.pending = {
+      icons = {
+        pending = '-',
+        done = '+',
+        priority = '*',
+        due = '@',
+        recur = '^',
+        category = '&',
+      },
+    }
+    config.reset()
+    local icons = config.get().icons
+    assert.equals('-', icons.pending)
+    assert.equals('+', icons.done)
+    assert.equals('*', icons.priority)
+    assert.equals('@', icons.due)
+    assert.equals('^', icons.recur)
+    assert.equals('&', icons.category)
+  end)
+end)

spec/oauth_spec.lua

@@ -0,0 +1,329 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+local oauth = require('pending.sync.oauth')
+
+describe('oauth', function()
+  local tmpdir
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    config.reset()
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+  end)
+
+  describe('url_encode', function()
+    it('leaves alphanumerics unchanged', function()
+      assert.equals('hello123', oauth.url_encode('hello123'))
+    end)
+
+    it('encodes spaces', function()
+      assert.equals('hello%20world', oauth.url_encode('hello world'))
+    end)
+
+    it('encodes special characters', function()
+      assert.equals('a%3Db%26c', oauth.url_encode('a=b&c'))
+    end)
+
+    it('preserves hyphens, dots, underscores, tildes', function()
+      assert.equals('a-b.c_d~e', oauth.url_encode('a-b.c_d~e'))
+    end)
+  end)
+
+  describe('load_json_file', function()
+    it('returns nil for missing file', function()
+      assert.is_nil(oauth.load_json_file(tmpdir .. '/nonexistent.json'))
+    end)
+
+    it('returns nil for empty file', function()
+      local path = tmpdir .. '/empty.json'
+      local f = io.open(path, 'w')
+      f:write('')
+      f:close()
+      assert.is_nil(oauth.load_json_file(path))
+    end)
+
+    it('returns nil for invalid JSON', function()
+      local path = tmpdir .. '/bad.json'
+      local f = io.open(path, 'w')
+      f:write('not json')
+      f:close()
+      assert.is_nil(oauth.load_json_file(path))
+    end)
+
+    it('parses valid JSON', function()
+      local path = tmpdir .. '/good.json'
+      local f = io.open(path, 'w')
+      f:write('{"key":"value"}')
+      f:close()
+      local data = oauth.load_json_file(path)
+      assert.equals('value', data.key)
+    end)
+  end)
+
+  describe('save_json_file', function()
+    it('creates parent directories', function()
+      local path = tmpdir .. '/sub/dir/file.json'
+      local ok = oauth.save_json_file(path, { test = true })
+      assert.is_true(ok)
+      local data = oauth.load_json_file(path)
+      assert.is_true(data.test)
+    end)
+
+    it('sets restrictive permissions', function()
+      local path = tmpdir .. '/secret.json'
+      oauth.save_json_file(path, { x = 1 })
+      local perms = vim.fn.getfperm(path)
+      assert.equals('rw-------', perms)
+    end)
+  end)
+
+  describe('resolve_credentials', function()
+    it('uses config fields when set', function()
+      config.reset()
+      vim.g.pending = {
+        data_path = tmpdir .. '/tasks.json',
+        sync = {
+          gtasks = {
+            client_id = 'config-id',
+            client_secret = 'config-secret',
+          },
+        },
+      }
+      local c = oauth.new({ name = 'gtasks', scope = 'x', port = 0, config_key = 'gtasks' })
+      local creds = c:resolve_credentials()
+      assert.equals('config-id', creds.client_id)
+      assert.equals('config-secret', creds.client_secret)
+    end)
+
+    it('uses credentials file when config fields absent', function()
+      local cred_path = tmpdir .. '/creds.json'
+      oauth.save_json_file(cred_path, {
+        client_id = 'file-id',
+        client_secret = 'file-secret',
+      })
+      config.reset()
+      vim.g.pending = {
+        data_path = tmpdir .. '/tasks.json',
+        sync = { gtasks = { credentials_path = cred_path } },
+      }
+      local c = oauth.new({ name = 'gtasks', scope = 'x', port = 0, config_key = 'gtasks' })
+      local creds = c:resolve_credentials()
+      assert.equals('file-id', creds.client_id)
+      assert.equals('file-secret', creds.client_secret)
+    end)
+
+    it('unwraps installed wrapper format', function()
+      local cred_path = tmpdir .. '/wrapped.json'
+      oauth.save_json_file(cred_path, {
+        installed = {
+          client_id = 'wrapped-id',
+          client_secret = 'wrapped-secret',
+        },
+      })
+      config.reset()
+      vim.g.pending = {
+        data_path = tmpdir .. '/tasks.json',
+        sync = { gcal = { credentials_path = cred_path } },
+      }
+      local c = oauth.new({ name = 'gcal', scope = 'x', port = 0, config_key = 'gcal' })
+      local creds = c:resolve_credentials()
+      assert.equals('wrapped-id', creds.client_id)
+      assert.equals('wrapped-secret', creds.client_secret)
+    end)
+
+    it('falls back to bundled credentials', function()
+      config.reset()
+      vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+      local orig_load = oauth.load_json_file
+      oauth.load_json_file = function()
+        return nil
+      end
+      local c = oauth.new({ name = 'gtasks', scope = 'x', port = 0, config_key = 'gtasks' })
+      local creds = c:resolve_credentials()
+      oauth.load_json_file = orig_load
+      assert.equals(oauth._BUNDLED_CLIENT_ID, creds.client_id)
+      assert.equals(oauth._BUNDLED_CLIENT_SECRET, creds.client_secret)
+    end)
+
+    it('prefers config fields over credentials file', function()
+      local cred_path = tmpdir .. '/creds2.json'
+      oauth.save_json_file(cred_path, {
+        client_id = 'file-id',
+        client_secret = 'file-secret',
+      })
+      config.reset()
+      vim.g.pending = {
+        data_path = tmpdir .. '/tasks.json',
+        sync = {
+          gtasks = {
+            credentials_path = cred_path,
+            client_id = 'config-id',
+            client_secret = 'config-secret',
+          },
+        },
+      }
+      local c = oauth.new({ name = 'gtasks', scope = 'x', port = 0, config_key = 'gtasks' })
+      local creds = c:resolve_credentials()
+      assert.equals('config-id', creds.client_id)
+      assert.equals('config-secret', creds.client_secret)
+    end)
+  end)
+
+  describe('token_path', function()
+    it('includes backend name', function()
+      local c = oauth.new({ name = 'gtasks', scope = 'x', port = 0, config_key = 'gtasks' })
+      assert.truthy(c:token_path():match('gtasks_tokens%.json$'))
+    end)
+
+    it('differs between backends', function()
+      local g = oauth.new({ name = 'gcal', scope = 'x', port = 0, config_key = 'gcal' })
+      local t = oauth.new({ name = 'gtasks', scope = 'x', port = 0, config_key = 'gtasks' })
+      assert.not_equals(g:token_path(), t:token_path())
+    end)
+  end)
+
+  describe('load_tokens / save_tokens', function()
+    it('round-trips tokens', function()
+      local c = oauth.new({ name = 'test', scope = 'x', port = 0, config_key = 'gtasks' })
+      local path = c:token_path()
+      local dir = vim.fn.fnamemodify(path, ':h')
+      vim.fn.mkdir(dir, 'p')
+      local tokens = {
+        access_token = 'at',
+        refresh_token = 'rt',
+        expires_in = 3600,
+        obtained_at = 1000,
+      }
+      c:save_tokens(tokens)
+      local loaded = c:load_tokens()
+      assert.equals('at', loaded.access_token)
+      assert.equals('rt', loaded.refresh_token)
+      vim.fn.delete(dir, 'rf')
+    end)
+  end)
+
+  describe('auth_headers', function()
+    it('includes bearer token', function()
+      local headers = oauth.auth_headers('mytoken')
+      assert.equals('Authorization: Bearer mytoken', headers[1])
+      assert.equals('Content-Type: application/json', headers[2])
+    end)
+  end)
+
+  describe('new', function()
+    it('creates client with correct fields', function()
+      local c = oauth.new({
+        name = 'test',
+        scope = 'https://example.com',
+        port = 12345,
+        config_key = 'test',
+      })
+      assert.equals('test', c.name)
+      assert.equals('https://example.com', c.scope)
+      assert.equals(12345, c.port)
+      assert.equals('test', c.config_key)
+    end)
+  end)
+
+  describe('with_token', function()
+    it('auto-triggers auth when not authenticated', function()
+      local c = oauth.new({ name = 'test_auth', scope = 'x', port = 0, config_key = 'gtasks' })
+      local call_count = 0
+      c.get_access_token = function()
+        call_count = call_count + 1
+        if call_count == 1 then
+          return nil
+        end
+        return 'new-token'
+      end
+      c.resolve_credentials = function()
+        return { client_id = 'real-id', client_secret = 'real-secret' }
+      end
+      local auth_called = false
+      c.auth = function(_, on_complete)
+        auth_called = true
+        vim.schedule(function()
+          on_complete(true)
+        end)
+      end
+      local received_token
+      oauth.with_token(c, 'test_auth', function(token)
+        received_token = token
+      end)
+      vim.wait(1000, function()
+        return received_token ~= nil
+      end)
+      assert.is_true(auth_called)
+      assert.equals('new-token', received_token)
+    end)
+
+    it('bails on bundled credentials without calling auth', function()
+      local c = oauth.new({ name = 'test_bail', scope = 'x', port = 0, config_key = 'gtasks' })
+      c.get_access_token = function()
+        return nil
+      end
+      c.resolve_credentials = function()
+        return { client_id = oauth.BUNDLED_CLIENT_ID, client_secret = 'x' }
+      end
+      local auth_called = false
+      c.auth = function()
+        auth_called = true
+      end
+      local callback_called = false
+      oauth.with_token(c, 'test_bail', function()
+        callback_called = true
+      end)
+      vim.wait(500, function()
+        return false
+      end)
+      assert.is_false(auth_called)
+      assert.is_false(callback_called)
+    end)
+
+    it('stops when auth fails', function()
+      local c = oauth.new({ name = 'test_fail', scope = 'x', port = 0, config_key = 'gtasks' })
+      c.get_access_token = function()
+        return nil
+      end
+      c.resolve_credentials = function()
+        return { client_id = 'real-id', client_secret = 'real-secret' }
+      end
+      c.auth = function(_, on_complete)
+        vim.schedule(function()
+          on_complete(false)
+        end)
+      end
+      local callback_called = false
+      oauth.with_token(c, 'test_fail', function()
+        callback_called = true
+      end)
+      vim.wait(500, function()
+        return false
+      end)
+      assert.is_false(callback_called)
+    end)
+
+    it('proceeds directly when already authenticated', function()
+      local c = oauth.new({ name = 'test_ok', scope = 'x', port = 0, config_key = 'gtasks' })
+      c.get_access_token = function()
+        return 'existing-token'
+      end
+      local received_token
+      oauth.with_token(c, 'test_ok', function(token)
+        received_token = token
+      end)
+      vim.wait(1000, function()
+        return received_token ~= nil
+      end)
+      assert.equals('existing-token', received_token)
+    end)
+  end)
+end)

spec/parse_spec.lua

@@ -154,6 +154,240 @@ describe('parse', function()
       local result = parse.resolve_date('')
       assert.is_nil(result)
     end)
+
+    it("returns yesterday's date for 'yesterday'", function()
+      local expected = os.date('%Y-%m-%d', os.time() - 86400)
+      local result = parse.resolve_date('yesterday')
+      assert.are.equal(expected, result)
+    end)
+
+    it("returns today's date for 'eod'", function()
+      local result = parse.resolve_date('eod')
+      assert.are.equal(os.date('%Y-%m-%d'), result)
+    end)
+
+    it('returns Monday of current week for sow', function()
+      local result = parse.resolve_date('sow')
+      assert.is_not_nil(result)
+      local y, m, d = result:match('^(%d+)-(%d+)-(%d+)$')
+      local t = os.time({ year = tonumber(y), month = tonumber(m), day = tonumber(d) })
+      local wday = os.date('*t', t).wday
+      assert.are.equal(2, wday)
+    end)
+
+    it('returns Sunday of current week for eow', function()
+      local result = parse.resolve_date('eow')
+      assert.is_not_nil(result)
+      local y, m, d = result:match('^(%d+)-(%d+)-(%d+)$')
+      local t = os.time({ year = tonumber(y), month = tonumber(m), day = tonumber(d) })
+      local wday = os.date('*t', t).wday
+      assert.are.equal(1, wday)
+    end)
+
+    it('returns first day of current month for som', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = string.format('%04d-%02d-01', today.year, today.month)
+      local result = parse.resolve_date('som')
+      assert.are.equal(expected, result)
+    end)
+
+    it('returns last day of current month for eom', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected =
+        os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month + 1, day = 0 }))
+      local result = parse.resolve_date('eom')
+      assert.are.equal(expected, result)
+    end)
+
+    it('returns first day of current quarter for soq', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local q = math.ceil(today.month / 3)
+      local first_month = (q - 1) * 3 + 1
+      local expected = string.format('%04d-%02d-01', today.year, first_month)
+      local result = parse.resolve_date('soq')
+      assert.are.equal(expected, result)
+    end)
+
+    it('returns last day of current quarter for eoq', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local q = math.ceil(today.month / 3)
+      local last_month = q * 3
+      local expected =
+        os.date('%Y-%m-%d', os.time({ year = today.year, month = last_month + 1, day = 0 }))
+      local result = parse.resolve_date('eoq')
+      assert.are.equal(expected, result)
+    end)
+
+    it('returns Jan 1 of current year for soy', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = string.format('%04d-01-01', today.year)
+      local result = parse.resolve_date('soy')
+      assert.are.equal(expected, result)
+    end)
+
+    it('returns Dec 31 of current year for eoy', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = string.format('%04d-12-31', today.year)
+      local result = parse.resolve_date('eoy')
+      assert.are.equal(expected, result)
+    end)
+
+    it('resolves +2w to 14 days from today', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = os.date(
+        '%Y-%m-%d',
+        os.time({ year = today.year, month = today.month, day = today.day + 14 })
+      )
+      local result = parse.resolve_date('+2w')
+      assert.are.equal(expected, result)
+    end)
+
+    it('resolves +3m to 3 months from today', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = os.date(
+        '%Y-%m-%d',
+        os.time({ year = today.year, month = today.month + 3, day = today.day })
+      )
+      local result = parse.resolve_date('+3m')
+      assert.are.equal(expected, result)
+    end)
+
+    it('resolves -2d to 2 days ago', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = os.date(
+        '%Y-%m-%d',
+        os.time({ year = today.year, month = today.month, day = today.day - 2 })
+      )
+      local result = parse.resolve_date('-2d')
+      assert.are.equal(expected, result)
+    end)
+
+    it('resolves -1w to 7 days ago', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = os.date(
+        '%Y-%m-%d',
+        os.time({ year = today.year, month = today.month, day = today.day - 7 })
+      )
+      local result = parse.resolve_date('-1w')
+      assert.are.equal(expected, result)
+    end)
+
+    it("resolves 'later' to someday_date", function()
+      local result = parse.resolve_date('later')
+      assert.are.equal('9999-12-30', result)
+    end)
+
+    it("resolves 'someday' to someday_date", function()
+      local result = parse.resolve_date('someday')
+      assert.are.equal('9999-12-30', result)
+    end)
+
+    it('resolves 15th to next 15th of month', function()
+      local result = parse.resolve_date('15th')
+      assert.is_not_nil(result)
+      local _, _, d = result:match('^(%d+)-(%d+)-(%d+)$')
+      assert.are.equal('15', d)
+    end)
+
+    it('resolves 1st to next 1st of month', function()
+      local result = parse.resolve_date('1st')
+      assert.is_not_nil(result)
+      local _, _, d = result:match('^(%d+)-(%d+)-(%d+)$')
+      assert.are.equal('01', d)
+    end)
+
+    it('resolves jan to next January 1st', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local result = parse.resolve_date('jan')
+      assert.is_not_nil(result)
+      local y, m, d = result:match('^(%d+)-(%d+)-(%d+)$')
+      assert.are.equal('01', m)
+      assert.are.equal('01', d)
+      if today.month >= 1 then
+        assert.are.equal(tostring(today.year + 1), y)
+      end
+    end)
+
+    it('resolves dec to next December 1st', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local result = parse.resolve_date('dec')
+      assert.is_not_nil(result)
+      local y, m, d = result:match('^(%d+)-(%d+)-(%d+)$')
+      assert.are.equal('12', m)
+      assert.are.equal('01', d)
+      if today.month >= 12 then
+        assert.are.equal(tostring(today.year + 1), y)
+      else
+        assert.are.equal(tostring(today.year), y)
+      end
+    end)
+  end)
+
+  describe('resolve_date with time suffix', function()
+    local today = os.date('*t') --[[@as osdate]]
+    local tomorrow_str =
+      os.date('%Y-%m-%d', os.time({ year = today.year, month = today.month, day = today.day + 1 })) --[[@as string]]
+
+    it('resolves bare hour to T09:00', function()
+      local result = parse.resolve_date('tomorrow@9')
+      assert.are.equal(tomorrow_str .. 'T09:00', result)
+    end)
+
+    it('resolves bare military hour to T14:00', function()
+      local result = parse.resolve_date('tomorrow@14')
+      assert.are.equal(tomorrow_str .. 'T14:00', result)
+    end)
+
+    it('resolves H:MM to T09:30', function()
+      local result = parse.resolve_date('tomorrow@9:30')
+      assert.are.equal(tomorrow_str .. 'T09:30', result)
+    end)
+
+    it('resolves HH:MM (existing format) to T09:30', function()
+      local result = parse.resolve_date('tomorrow@09:30')
+      assert.are.equal(tomorrow_str .. 'T09:30', result)
+    end)
+
+    it('resolves 2pm to T14:00', function()
+      local result = parse.resolve_date('tomorrow@2pm')
+      assert.are.equal(tomorrow_str .. 'T14:00', result)
+    end)
+
+    it('resolves 9am to T09:00', function()
+      local result = parse.resolve_date('tomorrow@9am')
+      assert.are.equal(tomorrow_str .. 'T09:00', result)
+    end)
+
+    it('resolves 9:30pm to T21:30', function()
+      local result = parse.resolve_date('tomorrow@9:30pm')
+      assert.are.equal(tomorrow_str .. 'T21:30', result)
+    end)
+
+    it('resolves 12am to T00:00', function()
+      local result = parse.resolve_date('tomorrow@12am')
+      assert.are.equal(tomorrow_str .. 'T00:00', result)
+    end)
+
+    it('resolves 12pm to T12:00', function()
+      local result = parse.resolve_date('tomorrow@12pm')
+      assert.are.equal(tomorrow_str .. 'T12:00', result)
+    end)
+
+    it('rejects hour 24', function()
+      assert.is_nil(parse.resolve_date('tomorrow@24'))
+    end)
+
+    it('rejects 13am', function()
+      assert.is_nil(parse.resolve_date('tomorrow@13am'))
+    end)
+
+    it('rejects minute 60', function()
+      assert.is_nil(parse.resolve_date('tomorrow@9:60'))
+    end)
+
+    it('rejects alphabetic garbage', function()
+      assert.is_nil(parse.resolve_date('tomorrow@abc'))
+    end)
   end)
 
   describe('command_add', function()
@@ -181,4 +415,115 @@ describe('parse', function()
       assert.are.equal('2026-03-15', meta.due)
     end)
   end)
+
+  describe('parse_duration_to_days', function()
+    it('parses days suffix', function()
+      assert.are.equal(7, parse.parse_duration_to_days('7d'))
+    end)
+
+    it('parses weeks suffix', function()
+      assert.are.equal(21, parse.parse_duration_to_days('3w'))
+    end)
+
+    it('parses months suffix (approximated as 30 days)', function()
+      assert.are.equal(60, parse.parse_duration_to_days('2m'))
+    end)
+
+    it('parses bare integer as days', function()
+      assert.are.equal(30, parse.parse_duration_to_days('30'))
+    end)
+
+    it('returns nil for nil input', function()
+      assert.is_nil(parse.parse_duration_to_days(nil))
+    end)
+
+    it('returns nil for empty string', function()
+      assert.is_nil(parse.parse_duration_to_days(''))
+    end)
+
+    it('returns nil for unrecognized input', function()
+      assert.is_nil(parse.parse_duration_to_days('xyz'))
+    end)
+
+    it('returns nil for negative numbers', function()
+      assert.is_nil(parse.parse_duration_to_days('-7d'))
+    end)
+
+    it('handles single digit', function()
+      assert.are.equal(1, parse.parse_duration_to_days('1d'))
+    end)
+
+    it('handles large numbers', function()
+      assert.are.equal(365, parse.parse_duration_to_days('365d'))
+    end)
+  end)
+
+  describe('input_date_formats', function()
+    before_each(function()
+      config.reset()
+    end)
+
+    after_each(function()
+      vim.g.pending = nil
+      config.reset()
+    end)
+
+    it('parses MM/DD/YYYY format', function()
+      vim.g.pending = { input_date_formats = { '%m/%d/%Y' } }
+      config.reset()
+      local result = parse.resolve_date('03/15/2026')
+      assert.are.equal('2026-03-15', result)
+    end)
+
+    it('parses DD-Mon-YYYY format', function()
+      vim.g.pending = { input_date_formats = { '%d-%b-%Y' } }
+      config.reset()
+      local result = parse.resolve_date('15-Mar-2026')
+      assert.are.equal('2026-03-15', result)
+    end)
+
+    it('parses month name case-insensitively', function()
+      vim.g.pending = { input_date_formats = { '%d-%b-%Y' } }
+      config.reset()
+      local result = parse.resolve_date('15-MARCH-2026')
+      assert.are.equal('2026-03-15', result)
+    end)
+
+    it('parses two-digit year', function()
+      vim.g.pending = { input_date_formats = { '%m/%d/%y' } }
+      config.reset()
+      local result = parse.resolve_date('03/15/26')
+      assert.are.equal('2026-03-15', result)
+    end)
+
+    it('infers year when format has no year field', function()
+      vim.g.pending = { input_date_formats = { '%m/%d' } }
+      config.reset()
+      local result = parse.resolve_date('12/31')
+      assert.is_not_nil(result)
+      assert.truthy(result:match('^%d%d%d%d%-12%-31$'))
+    end)
+
+    it('returns nil for non-matching input', function()
+      vim.g.pending = { input_date_formats = { '%m/%d/%Y' } }
+      config.reset()
+      local result = parse.resolve_date('not-a-date')
+      assert.is_nil(result)
+    end)
+
+    it('tries formats in order, returns first match', function()
+      vim.g.pending = { input_date_formats = { '%d/%m/%Y', '%m/%d/%Y' } }
+      config.reset()
+      local result = parse.resolve_date('01/03/2026')
+      assert.are.equal('2026-03-01', result)
+    end)
+
+    it('works with body() for inline due token', function()
+      vim.g.pending = { input_date_formats = { '%m/%d/%Y' } }
+      config.reset()
+      local desc, meta = parse.body('Pay rent due:03/15/2026')
+      assert.are.equal('Pay rent', desc)
+      assert.are.equal('2026-03-15', meta.due)
+    end)
+  end)
 end)

spec/recur_spec.lua

@@ -0,0 +1,223 @@
+require('spec.helpers')
+
+describe('recur', function()
+  local recur = require('pending.recur')
+
+  describe('parse', function()
+    it('parses daily', function()
+      local r = recur.parse('daily')
+      assert.are.equal('daily', r.freq)
+      assert.are.equal(1, r.interval)
+      assert.is_false(r.from_completion)
+    end)
+
+    it('parses weekdays', function()
+      local r = recur.parse('weekdays')
+      assert.are.equal('weekly', r.freq)
+      assert.are.same({ 'MO', 'TU', 'WE', 'TH', 'FR' }, r.byday)
+    end)
+
+    it('parses weekly', function()
+      local r = recur.parse('weekly')
+      assert.are.equal('weekly', r.freq)
+      assert.are.equal(1, r.interval)
+    end)
+
+    it('parses biweekly', function()
+      local r = recur.parse('biweekly')
+      assert.are.equal('weekly', r.freq)
+      assert.are.equal(2, r.interval)
+    end)
+
+    it('parses monthly', function()
+      local r = recur.parse('monthly')
+      assert.are.equal('monthly', r.freq)
+      assert.are.equal(1, r.interval)
+    end)
+
+    it('parses quarterly', function()
+      local r = recur.parse('quarterly')
+      assert.are.equal('monthly', r.freq)
+      assert.are.equal(3, r.interval)
+    end)
+
+    it('parses yearly', function()
+      local r = recur.parse('yearly')
+      assert.are.equal('yearly', r.freq)
+      assert.are.equal(1, r.interval)
+    end)
+
+    it('parses annual as yearly', function()
+      local r = recur.parse('annual')
+      assert.are.equal('yearly', r.freq)
+    end)
+
+    it('parses 3d as every 3 days', function()
+      local r = recur.parse('3d')
+      assert.are.equal('daily', r.freq)
+      assert.are.equal(3, r.interval)
+    end)
+
+    it('parses 2w as biweekly', function()
+      local r = recur.parse('2w')
+      assert.are.equal('weekly', r.freq)
+      assert.are.equal(2, r.interval)
+    end)
+
+    it('parses 6m as every 6 months', function()
+      local r = recur.parse('6m')
+      assert.are.equal('monthly', r.freq)
+      assert.are.equal(6, r.interval)
+    end)
+
+    it('parses 2y as every 2 years', function()
+      local r = recur.parse('2y')
+      assert.are.equal('yearly', r.freq)
+      assert.are.equal(2, r.interval)
+    end)
+
+    it('parses ! prefix as completion-based', function()
+      local r = recur.parse('!weekly')
+      assert.are.equal('weekly', r.freq)
+      assert.is_true(r.from_completion)
+    end)
+
+    it('parses raw RRULE fragment', function()
+      local r = recur.parse('FREQ=MONTHLY;BYDAY=1MO')
+      assert.is_not_nil(r)
+    end)
+
+    it('returns nil for invalid input', function()
+      assert.is_nil(recur.parse(''))
+      assert.is_nil(recur.parse('garbage'))
+      assert.is_nil(recur.parse('0d'))
+    end)
+
+    it('is case insensitive', function()
+      local r = recur.parse('Weekly')
+      assert.are.equal('weekly', r.freq)
+    end)
+  end)
+
+  describe('validate', function()
+    it('returns true for valid specs', function()
+      assert.is_true(recur.validate('daily'))
+      assert.is_true(recur.validate('2w'))
+      assert.is_true(recur.validate('!monthly'))
+    end)
+
+    it('returns false for invalid specs', function()
+      assert.is_false(recur.validate('garbage'))
+      assert.is_false(recur.validate(''))
+    end)
+  end)
+
+  describe('next_due', function()
+    it('advances daily by 1 day', function()
+      local result = recur.next_due('2099-03-01', 'daily', 'scheduled')
+      assert.are.equal('2099-03-02', result)
+    end)
+
+    it('advances weekly by 7 days', function()
+      local result = recur.next_due('2099-03-01', 'weekly', 'scheduled')
+      assert.are.equal('2099-03-08', result)
+    end)
+
+    it('advances monthly and clamps day', function()
+      local result = recur.next_due('2099-01-31', 'monthly', 'scheduled')
+      assert.are.equal('2099-02-28', result)
+    end)
+
+    it('advances yearly and handles leap year', function()
+      local result = recur.next_due('2096-02-29', 'yearly', 'scheduled')
+      assert.are.equal('2097-02-28', result)
+    end)
+
+    it('advances biweekly by 14 days', function()
+      local result = recur.next_due('2099-03-01', 'biweekly', 'scheduled')
+      assert.are.equal('2099-03-15', result)
+    end)
+
+    it('advances quarterly by 3 months', function()
+      local result = recur.next_due('2099-01-15', 'quarterly', 'scheduled')
+      assert.are.equal('2099-04-15', result)
+    end)
+
+    it('scheduled mode skips to future if overdue', function()
+      local result = recur.next_due('2020-01-01', 'yearly', 'scheduled')
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      assert.is_true(result > today)
+    end)
+
+    it('completion mode advances from today', function()
+      local today = os.date('*t') --[[@as osdate]]
+      local expected = os.date(
+        '%Y-%m-%d',
+        os.time({
+          year = today.year,
+          month = today.month,
+          day = today.day + 7,
+        })
+      )
+      local result = recur.next_due('2020-01-01', 'weekly', 'completion')
+      assert.are.equal(expected, result)
+    end)
+
+    it('advances 3d by 3 days', function()
+      local result = recur.next_due('2099-06-10', '3d', 'scheduled')
+      assert.are.equal('2099-06-13', result)
+    end)
+  end)
+
+  describe('to_rrule', function()
+    it('converts daily', function()
+      assert.are.equal('RRULE:FREQ=DAILY', recur.to_rrule('daily'))
+    end)
+
+    it('converts weekly', function()
+      assert.are.equal('RRULE:FREQ=WEEKLY', recur.to_rrule('weekly'))
+    end)
+
+    it('converts biweekly with interval', function()
+      assert.are.equal('RRULE:FREQ=WEEKLY;INTERVAL=2', recur.to_rrule('biweekly'))
+    end)
+
+    it('converts weekdays with BYDAY', function()
+      assert.are.equal('RRULE:FREQ=WEEKLY;BYDAY=MO,TU,WE,TH,FR', recur.to_rrule('weekdays'))
+    end)
+
+    it('converts monthly', function()
+      assert.are.equal('RRULE:FREQ=MONTHLY', recur.to_rrule('monthly'))
+    end)
+
+    it('converts quarterly with interval', function()
+      assert.are.equal('RRULE:FREQ=MONTHLY;INTERVAL=3', recur.to_rrule('quarterly'))
+    end)
+
+    it('converts yearly', function()
+      assert.are.equal('RRULE:FREQ=YEARLY', recur.to_rrule('yearly'))
+    end)
+
+    it('converts 2w with interval', function()
+      assert.are.equal('RRULE:FREQ=WEEKLY;INTERVAL=2', recur.to_rrule('2w'))
+    end)
+
+    it('prefixes raw RRULE fragment', function()
+      assert.are.equal('RRULE:FREQ=MONTHLY;BYDAY=1MO', recur.to_rrule('FREQ=MONTHLY;BYDAY=1MO'))
+    end)
+
+    it('returns empty string for invalid spec', function()
+      assert.are.equal('', recur.to_rrule('garbage'))
+    end)
+  end)
+
+  describe('shorthand_list', function()
+    it('returns a list of named shorthands', function()
+      local list = recur.shorthand_list()
+      assert.is_true(#list >= 8)
+      assert.is_true(vim.tbl_contains(list, 'daily'))
+      assert.is_true(vim.tbl_contains(list, 'weekly'))
+      assert.is_true(vim.tbl_contains(list, 'monthly'))
+    end)
+  end)
+end)

spec/s3_spec.lua

@@ -0,0 +1,626 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+local util = require('pending.sync.util')
+
+describe('s3', function()
+  local tmpdir
+  local pending
+  local s3
+  local orig_system
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    vim.g.pending = {
+      data_path = tmpdir .. '/tasks.json',
+      sync = { s3 = { bucket = 'test-bucket', key = 'test.json' } },
+    }
+    config.reset()
+    package.loaded['pending'] = nil
+    package.loaded['pending.sync.s3'] = nil
+    pending = require('pending')
+    s3 = require('pending.sync.s3')
+    orig_system = util.system
+  end)
+
+  after_each(function()
+    util.system = orig_system
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+    package.loaded['pending'] = nil
+    package.loaded['pending.sync.s3'] = nil
+  end)
+
+  it('has correct name', function()
+    assert.equals('s3', s3.name)
+  end)
+
+  it('has auth function', function()
+    assert.equals('function', type(s3.auth))
+  end)
+
+  it('has auth_complete returning profile', function()
+    local completions = s3.auth_complete()
+    assert.is_true(vim.tbl_contains(completions, 'profile'))
+  end)
+
+  it('has push, pull, sync functions', function()
+    assert.equals('function', type(s3.push))
+    assert.equals('function', type(s3.pull))
+    assert.equals('function', type(s3.sync))
+  end)
+
+  it('has health function', function()
+    assert.equals('function', type(s3.health))
+  end)
+
+  describe('ensure_sync_id', function()
+    it('assigns a UUID-like sync id', function()
+      local task = { _extra = nil, modified = '2026-01-01T00:00:00Z' }
+      local id = s3._ensure_sync_id(task)
+      assert.is_not_nil(id)
+      assert.truthy(
+        id:match('^%x%x%x%x%x%x%x%x%-%x%x%x%x%-%x%x%x%x%-%x%x%x%x%-%x%x%x%x%x%x%x%x%x%x%x%x$')
+      )
+      assert.equals(id, task._extra['_s3_sync_id'])
+    end)
+
+    it('returns existing sync id without regenerating', function()
+      local task = {
+        _extra = { _s3_sync_id = 'existing-id' },
+        modified = '2026-01-01T00:00:00Z',
+      }
+      local id = s3._ensure_sync_id(task)
+      assert.equals('existing-id', id)
+    end)
+  end)
+
+  describe('auth', function()
+    it('reports success on valid credentials', function()
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123456","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m)
+        msg = m
+      end
+      s3.auth()
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('authenticated'))
+    end)
+
+    it('skips bucket creation when bucket is configured', function()
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123456","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      local orig_input = util.input
+      local input_called = false
+      util.input = function()
+        input_called = true
+        return nil
+      end
+      s3.auth()
+      util.input = orig_input
+      assert.is_false(input_called)
+    end)
+
+    it('detects SSO expiry', function()
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return { code = 1, stdout = '', stderr = 'Error: SSO session expired' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m)
+        msg = m
+      end
+      s3.auth()
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('SSO'))
+    end)
+
+    it('detects missing credentials', function()
+      util.system = function()
+        return { code = 1, stdout = '', stderr = 'Unable to locate credentials' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      s3.auth()
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('no AWS credentials'))
+    end)
+  end)
+
+  describe('auth bucket creation', function()
+    local orig_input
+
+    before_each(function()
+      vim.g.pending = { data_path = tmpdir .. '/tasks.json', sync = { s3 = {} } }
+      config.reset()
+      package.loaded['pending'] = nil
+      package.loaded['pending.sync.s3'] = nil
+      pending = require('pending')
+      s3 = require('pending.sync.s3')
+      orig_input = util.input
+    end)
+
+    after_each(function()
+      util.input = orig_input
+    end)
+
+    it('prompts for bucket when none configured', function()
+      local input_calls = {}
+      util.input = function(opts)
+        table.insert(input_calls, opts)
+        if opts.prompt:find('bucket') then
+          return 'my-bucket'
+        end
+        return ''
+      end
+      local create_args
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        if vim.tbl_contains(args, 'configure') then
+          return { code = 0, stdout = 'us-west-2\n', stderr = '' }
+        end
+        if vim.tbl_contains(args, 'create-bucket') then
+          create_args = args
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m)
+        msg = m
+      end
+      s3.auth()
+      vim.notify = orig_notify
+      assert.equals(2, #input_calls)
+      assert.is_not_nil(create_args)
+      assert.truthy(vim.tbl_contains(create_args, 'my-bucket'))
+      assert.truthy(msg and msg:find('bucket created'))
+    end)
+
+    it('cancels when user provides nil bucket name', function()
+      util.input = function(opts)
+        if opts.prompt:find('bucket') then
+          return nil
+        end
+        return ''
+      end
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m)
+        msg = m
+      end
+      s3.auth()
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('cancelled'))
+    end)
+
+    it('omits LocationConstraint for us-east-1', function()
+      util.input = function(opts)
+        if opts.prompt:find('bucket') then
+          return 'my-bucket'
+        end
+        if opts.prompt:find('region') then
+          return 'us-east-1'
+        end
+        return ''
+      end
+      local create_args
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        if vim.tbl_contains(args, 'configure') then
+          return { code = 0, stdout = 'us-east-1\n', stderr = '' }
+        end
+        if vim.tbl_contains(args, 'create-bucket') then
+          create_args = args
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      s3.auth()
+      assert.is_not_nil(create_args)
+      local joined = table.concat(create_args, ' ')
+      assert.falsy(joined:find('LocationConstraint'))
+    end)
+
+    it('includes LocationConstraint for non-us-east-1 regions', function()
+      util.input = function(opts)
+        if opts.prompt:find('bucket') then
+          return 'my-bucket'
+        end
+        if opts.prompt:find('region') then
+          return 'eu-west-1'
+        end
+        return ''
+      end
+      local create_args
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        if vim.tbl_contains(args, 'configure') then
+          return { code = 0, stdout = 'eu-west-1\n', stderr = '' }
+        end
+        if vim.tbl_contains(args, 'create-bucket') then
+          create_args = args
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      s3.auth()
+      assert.is_not_nil(create_args)
+      assert.truthy(vim.tbl_contains(create_args, 'LocationConstraint=eu-west-1'))
+    end)
+
+    it('reports error on bucket creation failure', function()
+      util.input = function(opts)
+        if opts.prompt:find('bucket') then
+          return 'bad-bucket'
+        end
+        return ''
+      end
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        if vim.tbl_contains(args, 'configure') then
+          return { code = 0, stdout = 'us-east-1\n', stderr = '' }
+        end
+        if vim.tbl_contains(args, 'create-bucket') then
+          return { code = 1, stdout = '', stderr = 'BucketAlreadyExists' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      s3.auth()
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('bucket creation failed'))
+    end)
+
+    it('defaults region to us-east-1 when aws configure returns nothing', function()
+      util.input = function(opts)
+        if opts.prompt:find('bucket') then
+          return 'my-bucket'
+        end
+        return ''
+      end
+      local create_args
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return {
+            code = 0,
+            stdout = '{"Account":"123","Arn":"arn:aws:iam::user/test"}',
+            stderr = '',
+          }
+        end
+        if vim.tbl_contains(args, 'configure') then
+          return { code = 1, stdout = '', stderr = '' }
+        end
+        if vim.tbl_contains(args, 'create-bucket') then
+          create_args = args
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      s3.auth()
+      assert.is_not_nil(create_args)
+      assert.truthy(vim.tbl_contains(create_args, 'us-east-1'))
+      local joined = table.concat(create_args, ' ')
+      assert.falsy(joined:find('LocationConstraint'))
+    end)
+  end)
+
+  describe('ensure_credentials', function()
+    it('returns true on valid credentials', function()
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return { code = 0, stdout = '{"Account":"123"}', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      assert.is_true(s3._ensure_credentials())
+    end)
+
+    it('returns false on missing credentials', function()
+      util.system = function()
+        return { code = 1, stdout = '', stderr = 'Unable to locate credentials' }
+      end
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      assert.is_false(s3._ensure_credentials())
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('no AWS credentials'))
+    end)
+
+    it('retries SSO login on expired session', function()
+      local calls = {}
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return { code = 1, stdout = '', stderr = 'Error: SSO session expired' }
+        end
+        if vim.tbl_contains(args, 'sso') then
+          table.insert(calls, 'sso-login')
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      assert.is_true(s3._ensure_credentials())
+      assert.equals(1, #calls)
+      assert.equals('sso-login', calls[1])
+    end)
+
+    it('returns false when SSO login fails', function()
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return { code = 1, stdout = '', stderr = 'SSO token expired' }
+        end
+        if vim.tbl_contains(args, 'sso') then
+          return { code = 1, stdout = '', stderr = 'login failed' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+      assert.is_false(s3._ensure_credentials())
+    end)
+  end)
+
+  describe('push', function()
+    it('uploads store to S3', function()
+      local s = pending.store()
+      s:load()
+      s:add({ description = 'Test task', status = 'pending', category = 'Work', priority = 0 })
+      s:save()
+
+      local captured_args
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return { code = 0, stdout = '{"Account":"123"}', stderr = '' }
+        end
+        if vim.tbl_contains(args, 's3') then
+          captured_args = args
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+
+      s3.push()
+
+      assert.is_not_nil(captured_args)
+      local joined = table.concat(captured_args, ' ')
+      assert.truthy(joined:find('s3://test%-bucket/test%.json'))
+    end)
+
+    it('errors when bucket is not configured', function()
+      vim.g.pending = { data_path = tmpdir .. '/tasks.json', sync = { s3 = {} } }
+      config.reset()
+      package.loaded['pending'] = nil
+      package.loaded['pending.sync.s3'] = nil
+      pending = require('pending')
+      s3 = require('pending.sync.s3')
+
+      util.system = function(args)
+        if vim.tbl_contains(args, 'get-caller-identity') then
+          return { code = 0, stdout = '{"Account":"123"}', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+
+      local msg
+      local orig_notify = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      s3.push()
+      vim.notify = orig_notify
+      assert.truthy(msg and msg:find('bucket is required'))
+    end)
+  end)
+
+  describe('pull merge', function()
+    it('merges remote tasks by sync_id', function()
+      local store_mod = require('pending.store')
+      local s = pending.store()
+      s:load()
+      local local_task = s:add({
+        description = 'Local task',
+        status = 'pending',
+        category = 'Work',
+        priority = 0,
+      })
+      local_task._extra = { _s3_sync_id = 'sync-1' }
+      local_task.modified = '2026-03-01T00:00:00Z'
+      s:save()
+
+      local remote_path = tmpdir .. '/remote.json'
+      local remote_store = store_mod.new(remote_path)
+      remote_store:load()
+      local remote_task = remote_store:add({
+        description = 'Updated remotely',
+        status = 'pending',
+        category = 'Work',
+        priority = 1,
+      })
+      remote_task._extra = { _s3_sync_id = 'sync-1' }
+      remote_task.modified = '2026-03-05T00:00:00Z'
+
+      local new_remote = remote_store:add({
+        description = 'New remote task',
+        status = 'pending',
+        category = 'Personal',
+        priority = 0,
+      })
+      new_remote._extra = { _s3_sync_id = 'sync-2' }
+      new_remote.modified = '2026-03-04T00:00:00Z'
+      remote_store:save()
+
+      util.system = function(args)
+        if vim.tbl_contains(args, 's3') and vim.tbl_contains(args, 'cp') then
+          for i, arg in ipairs(args) do
+            if arg:match('^s3://') then
+              local dest = args[i + 1]
+              if dest and not dest:match('^s3://') then
+                local src = io.open(remote_path, 'r')
+                local content = src:read('*a')
+                src:close()
+                local f = io.open(dest, 'w')
+                f:write(content)
+                f:close()
+              end
+              break
+            end
+          end
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+
+      s3.pull()
+
+      s:load()
+      local tasks = s:tasks()
+      assert.equals(2, #tasks)
+
+      local found_updated = false
+      local found_new = false
+      for _, t in ipairs(tasks) do
+        if t._extra and t._extra['_s3_sync_id'] == 'sync-1' then
+          assert.equals('Updated remotely', t.description)
+          assert.equals(1, t.priority)
+          found_updated = true
+        end
+        if t._extra and t._extra['_s3_sync_id'] == 'sync-2' then
+          assert.equals('New remote task', t.description)
+          found_new = true
+        end
+      end
+      assert.is_true(found_updated)
+      assert.is_true(found_new)
+    end)
+
+    it('keeps local version when local is newer', function()
+      local s = pending.store()
+      s:load()
+      local local_task = s:add({
+        description = 'Local version',
+        status = 'pending',
+        category = 'Work',
+        priority = 0,
+      })
+      local_task._extra = { _s3_sync_id = 'sync-3' }
+      local_task.modified = '2026-03-10T00:00:00Z'
+      s:save()
+
+      local store_mod = require('pending.store')
+      local remote_path = tmpdir .. '/remote2.json'
+      local remote_store = store_mod.new(remote_path)
+      remote_store:load()
+      local remote_task = remote_store:add({
+        description = 'Older remote',
+        status = 'pending',
+        category = 'Work',
+        priority = 0,
+      })
+      remote_task._extra = { _s3_sync_id = 'sync-3' }
+      remote_task.modified = '2026-03-05T00:00:00Z'
+      remote_store:save()
+
+      util.system = function(args)
+        if vim.tbl_contains(args, 's3') and vim.tbl_contains(args, 'cp') then
+          for i, arg in ipairs(args) do
+            if arg:match('^s3://') then
+              local dest = args[i + 1]
+              if dest and not dest:match('^s3://') then
+                local src = io.open(remote_path, 'r')
+                local content = src:read('*a')
+                src:close()
+                local f = io.open(dest, 'w')
+                f:write(content)
+                f:close()
+              end
+              break
+            end
+          end
+          return { code = 0, stdout = '', stderr = '' }
+        end
+        return { code = 0, stdout = '', stderr = '' }
+      end
+
+      s3.pull()
+
+      s:load()
+      local tasks = s:tasks()
+      assert.equals(1, #tasks)
+      assert.equals('Local version', tasks[1].description)
+    end)
+  end)
+end)

spec/status_spec.lua

@@ -0,0 +1,260 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+local parse = require('pending.parse')
+
+describe('status', function()
+  local tmpdir
+  local pending
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    config.reset()
+    package.loaded['pending'] = nil
+    pending = require('pending')
+    pending.store():load()
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+    package.loaded['pending'] = nil
+  end)
+
+  describe('counts', function()
+    it('returns zeroes for empty store', function()
+      local c = pending.counts()
+      assert.are.equal(0, c.overdue)
+      assert.are.equal(0, c.today)
+      assert.are.equal(0, c.pending)
+      assert.are.equal(0, c.priority)
+      assert.is_nil(c.next_due)
+    end)
+
+    it('counts pending tasks', function()
+      local s = pending.store()
+      s:add({ description = 'One' })
+      s:add({ description = 'Two' })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(2, c.pending)
+    end)
+
+    it('counts priority tasks', function()
+      local s = pending.store()
+      s:add({ description = 'Urgent', priority = 1 })
+      s:add({ description = 'Normal' })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(1, c.priority)
+    end)
+
+    it('counts overdue tasks with date-only', function()
+      local s = pending.store()
+      s:add({ description = 'Old task', due = '2020-01-01' })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(1, c.overdue)
+    end)
+
+    it('counts overdue tasks with datetime', function()
+      local s = pending.store()
+      s:add({ description = 'Old task', due = '2020-01-01T08:00' })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(1, c.overdue)
+    end)
+
+    it('counts today tasks', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Today task', due = today })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(1, c.today)
+      assert.are.equal(0, c.overdue)
+    end)
+
+    it('counts mixed overdue and today', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Overdue', due = '2020-01-01' })
+      s:add({ description = 'Today', due = today })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(1, c.overdue)
+      assert.are.equal(1, c.today)
+    end)
+
+    it('excludes done tasks', function()
+      local s = pending.store()
+      local t = s:add({ description = 'Done', due = '2020-01-01' })
+      s:update(t.id, { status = 'done' })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(0, c.overdue)
+      assert.are.equal(0, c.pending)
+    end)
+
+    it('excludes deleted tasks', function()
+      local s = pending.store()
+      local t = s:add({ description = 'Deleted', due = '2020-01-01' })
+      s:delete(t.id)
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(0, c.overdue)
+      assert.are.equal(0, c.pending)
+    end)
+
+    it('excludes someday sentinel', function()
+      local s = pending.store()
+      s:add({ description = 'Someday', due = '9999-12-30' })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(0, c.overdue)
+      assert.are.equal(0, c.today)
+      assert.are.equal(1, c.pending)
+    end)
+
+    it('picks earliest future date as next_due', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Soon', due = '2099-06-01' })
+      s:add({ description = 'Sooner', due = '2099-03-01' })
+      s:add({ description = 'Today', due = today })
+      s:save()
+      pending._recompute_counts()
+      local c = pending.counts()
+      assert.are.equal(today, c.next_due)
+    end)
+
+    it('lazy loads on first counts() call', function()
+      local path = config.get().data_path
+      local f = io.open(path, 'w')
+      f:write(vim.json.encode({
+        version = 1,
+        next_id = 2,
+        tasks = {
+          {
+            id = 1,
+            description = 'Overdue',
+            status = 'pending',
+            due = '2020-01-01',
+            entry = '2020-01-01T00:00:00Z',
+            modified = '2020-01-01T00:00:00Z',
+          },
+        },
+      }))
+      f:close()
+      package.loaded['pending'] = nil
+      pending = require('pending')
+      local c = pending.counts()
+      assert.are.equal(1, c.overdue)
+    end)
+  end)
+
+  describe('statusline', function()
+    it('returns empty string when nothing actionable', function()
+      local s = pending.store()
+      s:save()
+      pending._recompute_counts()
+      assert.are.equal('', pending.statusline())
+    end)
+
+    it('formats overdue only', function()
+      local s = pending.store()
+      s:add({ description = 'Old', due = '2020-01-01' })
+      s:save()
+      pending._recompute_counts()
+      assert.are.equal('1 overdue', pending.statusline())
+    end)
+
+    it('formats today only', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Today', due = today })
+      s:save()
+      pending._recompute_counts()
+      assert.are.equal('1 today', pending.statusline())
+    end)
+
+    it('formats overdue and today', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Old', due = '2020-01-01' })
+      s:add({ description = 'Today', due = today })
+      s:save()
+      pending._recompute_counts()
+      assert.are.equal('1 overdue, 1 today', pending.statusline())
+    end)
+  end)
+
+  describe('has_due', function()
+    it('returns false when nothing due', function()
+      local s = pending.store()
+      s:add({ description = 'Future', due = '2099-01-01' })
+      s:save()
+      pending._recompute_counts()
+      assert.is_false(pending.has_due())
+    end)
+
+    it('returns true when overdue', function()
+      local s = pending.store()
+      s:add({ description = 'Old', due = '2020-01-01' })
+      s:save()
+      pending._recompute_counts()
+      assert.is_true(pending.has_due())
+    end)
+
+    it('returns true when today', function()
+      local s = pending.store()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      s:add({ description = 'Now', due = today })
+      s:save()
+      pending._recompute_counts()
+      assert.is_true(pending.has_due())
+    end)
+  end)
+
+  describe('parse.is_overdue', function()
+    it('date before today is overdue', function()
+      assert.is_true(parse.is_overdue('2020-01-01'))
+    end)
+
+    it('date after today is not overdue', function()
+      assert.is_false(parse.is_overdue('2099-01-01'))
+    end)
+
+    it('today date-only is not overdue', function()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      assert.is_false(parse.is_overdue(today))
+    end)
+  end)
+
+  describe('parse.is_today', function()
+    it('today date-only is today', function()
+      local today = os.date('%Y-%m-%d') --[[@as string]]
+      assert.is_true(parse.is_today(today))
+    end)
+
+    it('yesterday is not today', function()
+      assert.is_false(parse.is_today('2020-01-01'))
+    end)
+
+    it('tomorrow is not today', function()
+      assert.is_false(parse.is_today('2099-01-01'))
+    end)
+  end)
+end)

spec/store_spec.lua

@@ -5,31 +5,30 @@ local store = require('pending.store')
 
 describe('store', function()
   local tmpdir
+  local s
 
   before_each(function()
     tmpdir = vim.fn.tempname()
     vim.fn.mkdir(tmpdir, 'p')
-    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    s = store.new(tmpdir .. '/tasks.json')
-    config.reset()
+    s:load()
-    store.unload()
   end)
 
   after_each(function()
     vim.fn.delete(tmpdir, 'rf')
-    vim.g.pending = nil
     config.reset()
   end)
 
   describe('load', function()
     it('returns empty data when no file exists', function()
-      local data = store.load()
+      local data = s:load()
       assert.are.equal(1, data.version)
       assert.are.equal(1, data.next_id)
       assert.are.same({}, data.tasks)
     end)
 
     it('loads existing data', function()
-      local path = config.get().data_path
+      local path = tmpdir .. '/tasks.json'
       local f = io.open(path, 'w')
       f:write(vim.json.encode({
         version = 1,
@@ -52,7 +51,7 @@ describe('store', function()
         },
       }))
       f:close()
-      local data = store.load()
+      local data = s:load()
       assert.are.equal(3, data.next_id)
       assert.are.equal(2, #data.tasks)
       assert.are.equal('Pending one', data.tasks[1].description)
@@ -60,7 +59,7 @@ describe('store', function()
     end)
 
     it('preserves unknown fields', function()
-      local path = config.get().data_path
+      local path = tmpdir .. '/tasks.json'
       local f = io.open(path, 'w')
       f:write(vim.json.encode({
         version = 1,
@@ -77,8 +76,8 @@ describe('store', function()
         },
       }))
       f:close()
-      store.load()
+      s:load()
-      local task = store.get(1)
+      local task = s:get(1)
       assert.is_not_nil(task._extra)
       assert.are.equal('hello', task._extra.custom_field)
     end)
@@ -86,9 +85,8 @@ describe('store', function()
 
   describe('add', function()
     it('creates a task with incremented id', function()
-      store.load()
+      local t1 = s:add({ description = 'First' })
-      local t1 = store.add({ description = 'First' })
+      local t2 = s:add({ description = 'Second' })
-      local t2 = store.add({ description = 'Second' })
       assert.are.equal(1, t1.id)
       assert.are.equal(2, t2.id)
       assert.are.equal('pending', t1.status)
@@ -96,60 +94,54 @@ describe('store', function()
     end)
 
     it('uses provided category', function()
-      store.load()
+      local t = s:add({ description = 'Test', category = 'Work' })
-      local t = store.add({ description = 'Test', category = 'Work' })
       assert.are.equal('Work', t.category)
     end)
   end)
 
   describe('update', function()
     it('updates fields and sets modified', function()
-      store.load()
+      local t = s:add({ description = 'Original' })
-      local t = store.add({ description = 'Original' })
       t.modified = '2025-01-01T00:00:00Z'
-      store.update(t.id, { description = 'Updated' })
+      s:update(t.id, { description = 'Updated' })
-      local updated = store.get(t.id)
+      local updated = s:get(t.id)
       assert.are.equal('Updated', updated.description)
       assert.is_not.equal('2025-01-01T00:00:00Z', updated.modified)
     end)
 
     it('sets end timestamp on completion', function()
-      store.load()
+      local t = s:add({ description = 'Test' })
-      local t = store.add({ description = 'Test' })
       assert.is_nil(t['end'])
-      store.update(t.id, { status = 'done' })
+      s:update(t.id, { status = 'done' })
-      local updated = store.get(t.id)
+      local updated = s:get(t.id)
       assert.is_not_nil(updated['end'])
     end)
 
     it('does not overwrite id or entry', function()
-      store.load()
+      local t = s:add({ description = 'Immutable fields' })
-      local t = store.add({ description = 'Immutable fields' })
       local original_id = t.id
       local original_entry = t.entry
-      store.update(t.id, { id = 999, entry = 'x' })
+      s:update(t.id, { id = 999, entry = 'x' })
-      local updated = store.get(original_id)
+      local updated = s:get(original_id)
       assert.are.equal(original_id, updated.id)
       assert.are.equal(original_entry, updated.entry)
     end)
 
     it('does not overwrite end on second completion', function()
-      store.load()
+      local t = s:add({ description = 'Complete twice' })
-      local t = store.add({ description = 'Complete twice' })
+      s:update(t.id, { status = 'done', ['end'] = '2026-01-15T10:00:00Z' })
-      store.update(t.id, { status = 'done', ['end'] = '2026-01-15T10:00:00Z' })
+      local first_end = s:get(t.id)['end']
-      local first_end = store.get(t.id)['end']
+      s:update(t.id, { status = 'done' })
-      store.update(t.id, { status = 'done' })
+      local task = s:get(t.id)
-      local task = store.get(t.id)
       assert.are.equal(first_end, task['end'])
     end)
   end)
 
   describe('delete', function()
     it('marks task as deleted', function()
-      store.load()
+      local t = s:add({ description = 'To delete' })
-      local t = store.add({ description = 'To delete' })
+      s:delete(t.id)
-      store.delete(t.id)
+      local deleted = s:get(t.id)
-      local deleted = store.get(t.id)
       assert.are.equal('deleted', deleted.status)
       assert.is_not_nil(deleted['end'])
     end)
@@ -157,12 +149,10 @@ describe('store', function()
 
   describe('save and round-trip', function()
     it('persists and reloads correctly', function()
-      store.load()
+      s:add({ description = 'Persisted', category = 'Work', priority = 1 })
-      store.add({ description = 'Persisted', category = 'Work', priority = 1 })
+      s:save()
-      store.save()
+      s:load()
-      store.unload()
+      local tasks = s:active_tasks()
-      store.load()
-      local tasks = store.active_tasks()
       assert.are.equal(1, #tasks)
       assert.are.equal('Persisted', tasks[1].description)
       assert.are.equal('Work', tasks[1].category)
@@ -170,7 +160,7 @@ describe('store', function()
     end)
 
     it('round-trips unknown fields', function()
-      local path = config.get().data_path
+      local path = tmpdir .. '/tasks.json'
       local f = io.open(path, 'w')
       f:write(vim.json.encode({
         version = 1,
@@ -187,22 +177,78 @@ describe('store', function()
         },
       }))
       f:close()
-      store.load()
+      s:load()
-      store.save()
+      s:save()
-      store.unload()
+      s:load()
-      store.load()
+      local task = s:get(1)
-      local task = store.get(1)
       assert.are.equal('abc123', task._extra._gcal_event_id)
     end)
   end)
 
+  describe('recurrence fields', function()
+    it('persists recur and recur_mode through round-trip', function()
+      s:add({ description = 'Recurring', recur = 'weekly', recur_mode = 'scheduled' })
+      s:save()
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('weekly', task.recur)
+      assert.are.equal('scheduled', task.recur_mode)
+    end)
+
+    it('persists recur without recur_mode', function()
+      s:add({ description = 'Simple recur', recur = 'daily' })
+      s:save()
+      s:load()
+      local task = s:get(1)
+      assert.are.equal('daily', task.recur)
+      assert.is_nil(task.recur_mode)
+    end)
+
+    it('omits recur fields when not set', function()
+      s:add({ description = 'No recur' })
+      s:save()
+      s:load()
+      local task = s:get(1)
+      assert.is_nil(task.recur)
+      assert.is_nil(task.recur_mode)
+    end)
+  end)
+
+  describe('folded_categories', function()
+    it('defaults to empty table when missing from JSON', function()
+      local path = tmpdir .. '/tasks.json'
+      local f = io.open(path, 'w')
+      f:write(vim.json.encode({
+        version = 1,
+        next_id = 1,
+        tasks = {},
+      }))
+      f:close()
+      s:load()
+      assert.are.same({}, s:get_folded_categories())
+    end)
+
+    it('round-trips folded categories through save and load', function()
+      s:set_folded_categories({ 'Work', 'Home' })
+      s:save()
+      s:load()
+      assert.are.same({ 'Work', 'Home' }, s:get_folded_categories())
+    end)
+
+    it('persists empty list', function()
+      s:set_folded_categories({})
+      s:save()
+      s:load()
+      assert.are.same({}, s:get_folded_categories())
+    end)
+  end)
+
   describe('active_tasks', function()
     it('excludes deleted tasks', function()
-      store.load()
+      s:add({ description = 'Active' })
-      store.add({ description = 'Active' })
+      local t2 = s:add({ description = 'To delete' })
-      local t2 = store.add({ description = 'To delete' })
+      s:delete(t2.id)
-      store.delete(t2.id)
+      local active = s:active_tasks()
-      local active = store.active_tasks()
       assert.are.equal(1, #active)
       assert.are.equal('Active', active[1].description)
     end)
@@ -210,27 +256,24 @@ describe('store', function()
 
   describe('snapshot', function()
     it('returns a table of tasks', function()
-      store.load()
+      s:add({ description = 'Snap one' })
-      store.add({ description = 'Snap one' })
+      s:add({ description = 'Snap two' })
-      store.add({ description = 'Snap two' })
+      local snap = s:snapshot()
-      local snap = store.snapshot()
       assert.are.equal(2, #snap)
     end)
 
     it('returns a copy that does not affect the store', function()
-      store.load()
+      local t = s:add({ description = 'Original' })
-      local t = store.add({ description = 'Original' })
+      local snap = s:snapshot()
-      local snap = store.snapshot()
       snap[1].description = 'Mutated'
-      local live = store.get(t.id)
+      local live = s:get(t.id)
       assert.are.equal('Original', live.description)
     end)
 
     it('excludes deleted tasks', function()
-      store.load()
+      local t = s:add({ description = 'Will be deleted' })
-      local t = store.add({ description = 'Will be deleted' })
+      s:delete(t.id)
-      store.delete(t.id)
+      local snap = s:snapshot()
-      local snap = store.snapshot()
       assert.are.equal(0, #snap)
     end)
   end)

spec/sync_spec.lua

@@ -0,0 +1,185 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+
+describe('sync', function()
+  local tmpdir
+  local pending
+
+  before_each(function()
+    tmpdir = vim.fn.tempname()
+    vim.fn.mkdir(tmpdir, 'p')
+    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+    config.reset()
+    package.loaded['pending'] = nil
+    pending = require('pending')
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+    package.loaded['pending'] = nil
+  end)
+
+  describe('dispatch', function()
+    it('errors on unknown subcommand', function()
+      local msg
+      local orig = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      pending.command('notreal')
+      vim.notify = orig
+      assert.are.equal('[pending.nvim]: Unknown subcommand: notreal', msg)
+    end)
+
+    it('errors on unknown action for valid backend', function()
+      local msg
+      local orig = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      pending.command('gcal notreal')
+      vim.notify = orig
+      assert.are.equal("[pending.nvim]: gcal: No 'notreal' action.", msg)
+    end)
+
+    it('lists actions when action is omitted', function()
+      local msg = nil
+      local orig = vim.notify
+      vim.notify = function(m)
+        msg = m
+      end
+      pending.command('gcal')
+      vim.notify = orig
+      assert.is_not_nil(msg)
+      assert.is_truthy(msg:find('push'))
+    end)
+
+    it('routes explicit push action', function()
+      local called = false
+      local gcal = require('pending.sync.gcal')
+      local orig_push = gcal.push
+      gcal.push = function()
+        called = true
+      end
+      pending.command('gcal push')
+      gcal.push = orig_push
+      assert.is_true(called)
+    end)
+
+    it('routes auth command', function()
+      local called = false
+      local orig_auth = pending.auth
+      pending.auth = function()
+        called = true
+      end
+      pending.command('auth')
+      pending.auth = orig_auth
+      assert.is_true(called)
+    end)
+  end)
+
+  it('works with sync.gcal config', function()
+    config.reset()
+    vim.g.pending = {
+      data_path = tmpdir .. '/tasks.json',
+      sync = { gcal = { client_id = 'test-id' } },
+    }
+    local cfg = config.get()
+    assert.are.equal('test-id', cfg.sync.gcal.client_id)
+  end)
+
+  describe('gcal module', function()
+    it('has name field', function()
+      local gcal = require('pending.sync.gcal')
+      assert.are.equal('gcal', gcal.name)
+    end)
+
+    it('has push function', function()
+      local gcal = require('pending.sync.gcal')
+      assert.are.equal('function', type(gcal.push))
+    end)
+
+    it('has health function', function()
+      local gcal = require('pending.sync.gcal')
+      assert.are.equal('function', type(gcal.health))
+    end)
+
+    it('has auth function', function()
+      local gcal = require('pending.sync.gcal')
+      assert.are.equal('function', type(gcal.auth))
+    end)
+
+    it('has auth_complete function', function()
+      local gcal = require('pending.sync.gcal')
+      local completions = gcal.auth_complete()
+      assert.is_true(vim.tbl_contains(completions, 'clear'))
+      assert.is_true(vim.tbl_contains(completions, 'reset'))
+    end)
+  end)
+
+  describe('auto-discovery', function()
+    it('discovers gcal and gtasks backends', function()
+      local backends = pending.sync_backends()
+      assert.is_true(vim.tbl_contains(backends, 'gcal'))
+      assert.is_true(vim.tbl_contains(backends, 'gtasks'))
+    end)
+
+    it('excludes modules without name field', function()
+      local set = pending.sync_backend_set()
+      assert.is_nil(set['oauth'])
+      assert.is_nil(set['util'])
+    end)
+
+    it('populates backend set correctly', function()
+      local set = pending.sync_backend_set()
+      assert.is_true(set['gcal'] == true)
+      assert.is_true(set['gtasks'] == true)
+    end)
+  end)
+
+  describe('auth dispatch', function()
+    it('routes auth to specific backend', function()
+      local called_with = nil
+      local gcal = require('pending.sync.gcal')
+      local orig_auth = gcal.auth
+      gcal.auth = function(args)
+        called_with = args or 'default'
+      end
+      pending.auth('gcal')
+      gcal.auth = orig_auth
+      assert.are.equal('default', called_with)
+    end)
+
+    it('routes auth with sub-action', function()
+      local called_with = nil
+      local gcal = require('pending.sync.gcal')
+      local orig_auth = gcal.auth
+      gcal.auth = function(args)
+        called_with = args
+      end
+      pending.auth('gcal clear')
+      gcal.auth = orig_auth
+      assert.are.equal('clear', called_with)
+    end)
+
+    it('errors on unknown backend', function()
+      local msg
+      local orig = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.ERROR then
+          msg = m
+        end
+      end
+      pending.auth('nonexistent')
+      vim.notify = orig
+      assert.truthy(msg and msg:find('No auth method'))
+    end)
+  end)
+end)

spec/sync_util_spec.lua

@@ -0,0 +1,100 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+local util = require('pending.sync.util')
+
+describe('sync util', function()
+  before_each(function()
+    config.reset()
+  end)
+
+  after_each(function()
+    config.reset()
+  end)
+
+  describe('fmt_counts', function()
+    it('returns nothing to do for empty counts', function()
+      assert.equals('nothing to do', util.fmt_counts({}))
+    end)
+
+    it('returns nothing to do when all zero', function()
+      assert.equals('nothing to do', util.fmt_counts({ { 0, 'added' }, { 0, 'failed' } }))
+    end)
+
+    it('formats single non-zero count', function()
+      assert.equals('3 added', util.fmt_counts({ { 3, 'added' }, { 0, 'failed' } }))
+    end)
+
+    it('joins multiple non-zero counts with pipe', function()
+      local result = util.fmt_counts({ { 2, 'added' }, { 1, 'updated' }, { 0, 'failed' } })
+      assert.equals('2 added | 1 updated', result)
+    end)
+  end)
+
+  describe('with_guard', function()
+    it('prevents concurrent calls', function()
+      local inner_called = false
+      local blocked = false
+
+      local msgs = {}
+      local orig = vim.notify
+      vim.notify = function(m, level)
+        if level == vim.log.levels.WARN then
+          table.insert(msgs, m)
+        end
+      end
+
+      util.with_guard('test', function()
+        inner_called = true
+        util.with_guard('test2', function()
+          blocked = true
+        end)
+      end)
+
+      vim.notify = orig
+      assert.is_true(inner_called)
+      assert.is_false(blocked)
+      assert.equals(1, #msgs)
+      assert.truthy(msgs[1]:find('Sync already in progress'))
+    end)
+
+    it('clears guard after error', function()
+      pcall(util.with_guard, 'err-test', function()
+        error('boom')
+      end)
+
+      assert.is_false(util.sync_in_flight())
+    end)
+
+    it('clears guard after success', function()
+      util.with_guard('ok-test', function() end)
+      assert.is_false(util.sync_in_flight())
+    end)
+  end)
+
+  describe('finish', function()
+    it('calls save and recompute', function()
+      local helpers = require('spec.helpers')
+      local store_mod = require('pending.store')
+      local tmpdir = helpers.tmpdir()
+      vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
+      config.reset()
+      package.loaded['pending'] = nil
+
+      local s = store_mod.new(tmpdir .. '/tasks.json')
+      s:load()
+      s:add({ description = 'Test', status = 'pending', category = 'Work', priority = 0 })
+
+      util.finish(s)
+
+      local reloaded = store_mod.new(tmpdir .. '/tasks.json')
+      reloaded:load()
+      assert.equals(1, #reloaded:tasks())
+
+      vim.fn.delete(tmpdir, 'rf')
+      vim.g.pending = nil
+      config.reset()
+      package.loaded['pending'] = nil
+    end)
+  end)
+end)

spec/textobj_spec.lua

@@ -0,0 +1,194 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+
+describe('textobj', function()
+  local textobj = require('pending.textobj')
+
+  before_each(function()
+    vim.g.pending = nil
+    config.reset()
+  end)
+
+  after_each(function()
+    vim.g.pending = nil
+    config.reset()
+  end)
+
+  describe('inner_task_range', function()
+    it('returns description range for task with id prefix', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] Buy groceries')
+      assert.are.equal(10, s)
+      assert.are.equal(22, e)
+    end)
+
+    it('returns description range for task without id prefix', function()
+      local s, e = textobj.inner_task_range('- [ ] Buy groceries')
+      assert.are.equal(7, s)
+      assert.are.equal(19, e)
+    end)
+
+    it('excludes trailing due: token', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] Buy groceries due:2026-03-15')
+      assert.are.equal(10, s)
+      assert.are.equal(22, e)
+    end)
+
+    it('excludes trailing cat: token', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] Buy groceries cat:Errands')
+      assert.are.equal(10, s)
+      assert.are.equal(22, e)
+    end)
+
+    it('excludes trailing rec: token', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] Take out trash rec:weekly')
+      assert.are.equal(10, s)
+      assert.are.equal(23, e)
+    end)
+
+    it('excludes multiple trailing metadata tokens', function()
+      local s, e =
+        textobj.inner_task_range('/1/- [ ] Buy milk due:2026-03-15 cat:Errands rec:weekly')
+      assert.are.equal(10, s)
+      assert.are.equal(17, e)
+    end)
+
+    it('handles priority checkbox', function()
+      local s, e = textobj.inner_task_range('/1/- [!] Important task')
+      assert.are.equal(10, s)
+      assert.are.equal(23, e)
+    end)
+
+    it('handles done checkbox', function()
+      local s, e = textobj.inner_task_range('/1/- [x] Finished task')
+      assert.are.equal(10, s)
+      assert.are.equal(22, e)
+    end)
+
+    it('handles multi-digit task ids', function()
+      local s, e = textobj.inner_task_range('/123/- [ ] Some task')
+      assert.are.equal(12, s)
+      assert.are.equal(20, e)
+    end)
+
+    it('does not strip non-metadata tokens', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] Buy groceries for dinner')
+      assert.are.equal(10, s)
+      assert.are.equal(33, e)
+    end)
+
+    it('stops stripping at first non-metadata token from right', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] Buy groceries for dinner due:2026-03-15')
+      assert.are.equal(10, s)
+      assert.are.equal(33, e)
+    end)
+
+    it('respects custom date_syntax', function()
+      vim.g.pending = { date_syntax = 'by' }
+      config.reset()
+      local s, e = textobj.inner_task_range('/1/- [ ] Buy groceries by:2026-03-15')
+      assert.are.equal(10, s)
+      assert.are.equal(22, e)
+    end)
+
+    it('respects custom recur_syntax', function()
+      vim.g.pending = { recur_syntax = 'repeat' }
+      config.reset()
+      local s, e = textobj.inner_task_range('/1/- [ ] Take trash repeat:weekly')
+      assert.are.equal(10, s)
+      assert.are.equal(19, e)
+    end)
+
+    it('handles task with only metadata after description', function()
+      local s, e = textobj.inner_task_range('/1/- [ ] X due:tomorrow')
+      assert.are.equal(10, s)
+      assert.are.equal(10, e)
+    end)
+  end)
+
+  describe('category_bounds', function()
+    it('returns header and last row for single category', function()
+      ---@type pending.LineMeta[]
+      local meta = {
+        { type = 'header', category = 'Work' },
+        { type = 'task', id = 1 },
+        { type = 'task', id = 2 },
+      }
+      local h, l = textobj.category_bounds(2, meta)
+      assert.are.equal(1, h)
+      assert.are.equal(3, l)
+    end)
+
+    it('returns bounds for first category with trailing blank', function()
+      ---@type pending.LineMeta[]
+      local meta = {
+        { type = 'header', category = 'Work' },
+        { type = 'task', id = 1 },
+        { type = 'blank' },
+        { type = 'header', category = 'Personal' },
+        { type = 'task', id = 2 },
+      }
+      local h, l = textobj.category_bounds(2, meta)
+      assert.are.equal(1, h)
+      assert.are.equal(3, l)
+    end)
+
+    it('returns bounds for second category', function()
+      ---@type pending.LineMeta[]
+      local meta = {
+        { type = 'header', category = 'Work' },
+        { type = 'task', id = 1 },
+        { type = 'blank' },
+        { type = 'header', category = 'Personal' },
+        { type = 'task', id = 2 },
+        { type = 'task', id = 3 },
+      }
+      local h, l = textobj.category_bounds(5, meta)
+      assert.are.equal(4, h)
+      assert.are.equal(6, l)
+    end)
+
+    it('returns bounds when cursor is on header', function()
+      ---@type pending.LineMeta[]
+      local meta = {
+        { type = 'header', category = 'Work' },
+        { type = 'task', id = 1 },
+      }
+      local h, l = textobj.category_bounds(1, meta)
+      assert.are.equal(1, h)
+      assert.are.equal(2, l)
+    end)
+
+    it('returns nil for blank line with no preceding header', function()
+      ---@type pending.LineMeta[]
+      local meta = {
+        { type = 'blank' },
+        { type = 'header', category = 'Work' },
+        { type = 'task', id = 1 },
+      }
+      local h, l = textobj.category_bounds(1, meta)
+      assert.is_nil(h)
+      assert.is_nil(l)
+    end)
+
+    it('returns nil for empty meta', function()
+      local h, l = textobj.category_bounds(1, {})
+      assert.is_nil(h)
+      assert.is_nil(l)
+    end)
+
+    it('includes blank between header and next header in bounds', function()
+      ---@type pending.LineMeta[]
+      local meta = {
+        { type = 'header', category = 'Work' },
+        { type = 'task', id = 1 },
+        { type = 'blank' },
+        { type = 'header', category = 'Home' },
+        { type = 'task', id = 2 },
+      }
+      local h, l = textobj.category_bounds(1, meta)
+      assert.are.equal(1, h)
+      assert.are.equal(3, l)
+    end)
+  end)
+end)

spec/views_spec.lua

@@ -5,39 +5,38 @@ local store = require('pending.store')
 
 describe('views', function()
   local tmpdir
+  local s
   local views = require('pending.views')
 
   before_each(function()
     tmpdir = vim.fn.tempname()
     vim.fn.mkdir(tmpdir, 'p')
-    vim.g.pending = { data_path = tmpdir .. '/tasks.json' }
     config.reset()
-    store.unload()
+    s = store.new(tmpdir .. '/tasks.json')
-    store.load()
+    s:load()
   end)
 
   after_each(function()
     vim.fn.delete(tmpdir, 'rf')
-    vim.g.pending = nil
     config.reset()
   end)
 
   describe('category_view', function()
     it('groups tasks under their category header', function()
-      store.add({ description = 'Task A', category = 'Work' })
+      s:add({ description = 'Task A', category = 'Work' })
-      store.add({ description = 'Task B', category = 'Work' })
+      s:add({ description = 'Task B', category = 'Work' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
-      assert.are.equal('## Work', lines[1])
+      assert.are.equal('# Work', lines[1])
       assert.are.equal('header', meta[1].type)
       assert.is_true(lines[2]:find('Task A') ~= nil)
       assert.is_true(lines[3]:find('Task B') ~= nil)
     end)
 
     it('places pending tasks before done tasks within a category', function()
-      local t1 = store.add({ description = 'Done task', category = 'Work' })
+      local t1 = s:add({ description = 'Done task', category = 'Work' })
-      store.add({ description = 'Pending task', category = 'Work' })
+      s:add({ description = 'Pending task', category = 'Work' })
-      store.update(t1.id, { status = 'done' })
+      s:update(t1.id, { status = 'done' })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       local pending_row, done_row
       for i, m in ipairs(meta) do
         if m.type == 'task' and m.status == 'pending' then
@@ -50,9 +49,9 @@ describe('views', function()
     end)
 
     it('sorts high-priority tasks before normal tasks within pending group', function()
-      store.add({ description = 'Normal', category = 'Work', priority = 0 })
+      s:add({ description = 'Normal', category = 'Work', priority = 0 })
-      store.add({ description = 'High', category = 'Work', priority = 1 })
+      s:add({ description = 'High', category = 'Work', priority = 1 })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local high_row, normal_row
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -68,11 +67,11 @@ describe('views', function()
     end)
 
     it('sorts high-priority tasks before normal tasks within done group', function()
-      local t1 = store.add({ description = 'Done Normal', category = 'Work', priority = 0 })
+      local t1 = s:add({ description = 'Done Normal', category = 'Work', priority = 0 })
-      local t2 = store.add({ description = 'Done High', category = 'Work', priority = 1 })
+      local t2 = s:add({ description = 'Done High', category = 'Work', priority = 1 })
-      store.update(t1.id, { status = 'done' })
+      s:update(t1.id, { status = 'done' })
-      store.update(t2.id, { status = 'done' })
+      s:update(t2.id, { status = 'done' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local high_row, normal_row
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -88,9 +87,9 @@ describe('views', function()
     end)
 
     it('gives each category its own header with blank lines between them', function()
-      store.add({ description = 'Task A', category = 'Work' })
+      s:add({ description = 'Task A', category = 'Work' })
-      store.add({ description = 'Task B', category = 'Personal' })
+      s:add({ description = 'Task B', category = 'Personal' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local headers = {}
       local blank_found = false
       for i, m in ipairs(meta) do
@@ -105,8 +104,8 @@ describe('views', function()
     end)
 
     it('formats task lines as /ID/  description', function()
-      store.add({ description = 'My task', category = 'Inbox' })
+      s:add({ description = 'My task', category = 'Inbox' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local task_line
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -117,8 +116,8 @@ describe('views', function()
     end)
 
     it('formats priority task lines as /ID/- [!] description', function()
-      store.add({ description = 'Important', category = 'Inbox', priority = 1 })
+      s:add({ description = 'Important', category = 'Inbox', priority = 1 })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local task_line
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -129,15 +128,15 @@ describe('views', function()
     end)
 
     it('sets LineMeta type=header for header lines with correct category', function()
-      store.add({ description = 'T', category = 'School' })
+      s:add({ description = 'T', category = 'School' })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       assert.are.equal('header', meta[1].type)
       assert.are.equal('School', meta[1].category)
     end)
 
     it('sets LineMeta type=task with correct id and status', function()
-      local t = store.add({ description = 'Do something', category = 'Inbox' })
+      local t = s:add({ description = 'Do something', category = 'Inbox' })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' then
@@ -150,9 +149,9 @@ describe('views', function()
     end)
 
     it('sets LineMeta type=blank for blank separator lines', function()
-      store.add({ description = 'A', category = 'Work' })
+      s:add({ description = 'A', category = 'Work' })
-      store.add({ description = 'B', category = 'Home' })
+      s:add({ description = 'B', category = 'Home' })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       local blank_meta
       for _, m in ipairs(meta) do
         if m.type == 'blank' then
@@ -166,8 +165,8 @@ describe('views', function()
 
     it('marks overdue pending tasks with meta.overdue=true', function()
       local yesterday = os.date('%Y-%m-%d', os.time() - 86400)
-      local t = store.add({ description = 'Overdue task', category = 'Inbox', due = yesterday })
+      local t = s:add({ description = 'Overdue task', category = 'Inbox', due = yesterday })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' and m.id == t.id then
@@ -179,8 +178,8 @@ describe('views', function()
 
     it('does not mark future pending tasks as overdue', function()
       local tomorrow = os.date('%Y-%m-%d', os.time() + 86400)
-      local t = store.add({ description = 'Future task', category = 'Inbox', due = tomorrow })
+      local t = s:add({ description = 'Future task', category = 'Inbox', due = tomorrow })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' and m.id == t.id then
@@ -192,9 +191,9 @@ describe('views', function()
 
     it('does not mark done tasks with overdue due dates as overdue', function()
       local yesterday = os.date('%Y-%m-%d', os.time() - 86400)
-      local t = store.add({ description = 'Done late', category = 'Inbox', due = yesterday })
+      local t = s:add({ description = 'Done late', category = 'Inbox', due = yesterday })
-      store.update(t.id, { status = 'done' })
+      s:update(t.id, { status = 'done' })
-      local _, meta = views.category_view(store.active_tasks())
+      local _, meta = views.category_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' and m.id == t.id then
@@ -204,12 +203,39 @@ describe('views', function()
       assert.is_falsy(task_meta.overdue)
     end)
 
+    it('includes recur in LineMeta for recurring tasks', function()
+      s:add({ description = 'Recurring', category = 'Inbox', recur = 'weekly' })
+      local _, meta = views.category_view(s:active_tasks())
+      local task_meta
+      for _, m in ipairs(meta) do
+        if m.type == 'task' then
+          task_meta = m
+        end
+      end
+      assert.are.equal('weekly', task_meta.recur)
+    end)
+
+    it('has nil recur in LineMeta for non-recurring tasks', function()
+      s:add({ description = 'Normal', category = 'Inbox' })
+      local _, meta = views.category_view(s:active_tasks())
+      local task_meta
+      for _, m in ipairs(meta) do
+        if m.type == 'task' then
+          task_meta = m
+        end
+      end
+      assert.is_nil(task_meta.recur)
+    end)
+
     it('respects category_order when set', function()
-      vim.g.pending = { data_path = tmpdir .. '/tasks.json', category_order = { 'Work', 'Inbox' } }
+      vim.g.pending = {
+        data_path = tmpdir .. '/tasks.json',
+        view = { category = { order = { 'Work', 'Inbox' } } },
+      }
       config.reset()
-      store.add({ description = 'Inbox task', category = 'Inbox' })
+      s:add({ description = 'Inbox task', category = 'Inbox' })
-      store.add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Work task', category = 'Work' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local first_header, second_header
       for i, m in ipairs(meta) do
         if m.type == 'header' then
@@ -220,47 +246,48 @@ describe('views', function()
           end
         end
       end
-      assert.are.equal('## Work', first_header)
+      assert.are.equal('# Work', first_header)
-      assert.are.equal('## Inbox', second_header)
+      assert.are.equal('# Inbox', second_header)
     end)
 
     it('appends categories not in category_order after ordered ones', function()
-      vim.g.pending = { data_path = tmpdir .. '/tasks.json', category_order = { 'Work' } }
+      vim.g.pending =
+        { data_path = tmpdir .. '/tasks.json', view = { category = { order = { 'Work' } } } }
       config.reset()
-      store.add({ description = 'Errand', category = 'Errands' })
+      s:add({ description = 'Errand', category = 'Errands' })
-      store.add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Work task', category = 'Work' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local headers = {}
       for i, m in ipairs(meta) do
         if m.type == 'header' then
           table.insert(headers, lines[i])
         end
       end
-      assert.are.equal('## Work', headers[1])
+      assert.are.equal('# Work', headers[1])
-      assert.are.equal('## Errands', headers[2])
+      assert.are.equal('# Errands', headers[2])
     end)
 
     it('preserves insertion order when category_order is empty', function()
-      store.add({ description = 'Alpha task', category = 'Alpha' })
+      s:add({ description = 'Alpha task', category = 'Alpha' })
-      store.add({ description = 'Beta task', category = 'Beta' })
+      s:add({ description = 'Beta task', category = 'Beta' })
-      local lines, meta = views.category_view(store.active_tasks())
+      local lines, meta = views.category_view(s:active_tasks())
       local headers = {}
       for i, m in ipairs(meta) do
         if m.type == 'header' then
           table.insert(headers, lines[i])
         end
       end
-      assert.are.equal('## Alpha', headers[1])
+      assert.are.equal('# Alpha', headers[1])
-      assert.are.equal('## Beta', headers[2])
+      assert.are.equal('# Beta', headers[2])
     end)
   end)
 
   describe('priority_view', function()
     it('places all pending tasks before done tasks', function()
-      local t1 = store.add({ description = 'Done A', category = 'Work' })
+      local t1 = s:add({ description = 'Done A', category = 'Work' })
-      store.add({ description = 'Pending B', category = 'Work' })
+      s:add({ description = 'Pending B', category = 'Work' })
-      store.update(t1.id, { status = 'done' })
+      s:update(t1.id, { status = 'done' })
-      local _, meta = views.priority_view(store.active_tasks())
+      local _, meta = views.priority_view(s:active_tasks())
       local last_pending_row, first_done_row
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -275,9 +302,9 @@ describe('views', function()
     end)
 
     it('sorts pending tasks by priority desc within pending group', function()
-      store.add({ description = 'Low', category = 'Work', priority = 0 })
+      s:add({ description = 'Low', category = 'Work', priority = 0 })
-      store.add({ description = 'High', category = 'Work', priority = 1 })
+      s:add({ description = 'High', category = 'Work', priority = 1 })
-      local lines, meta = views.priority_view(store.active_tasks())
+      local lines, meta = views.priority_view(s:active_tasks())
       local high_row, low_row
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -292,9 +319,9 @@ describe('views', function()
     end)
 
     it('sorts pending tasks with due dates before those without', function()
-      store.add({ description = 'No due', category = 'Work' })
+      s:add({ description = 'No due', category = 'Work' })
-      store.add({ description = 'Has due', category = 'Work', due = '2099-12-31' })
+      s:add({ description = 'Has due', category = 'Work', due = '2099-12-31' })
-      local lines, meta = views.priority_view(store.active_tasks())
+      local lines, meta = views.priority_view(s:active_tasks())
       local due_row, nodue_row
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -309,9 +336,9 @@ describe('views', function()
     end)
 
     it('sorts pending tasks with earlier due dates before later due dates', function()
-      store.add({ description = 'Later', category = 'Work', due = '2099-12-31' })
+      s:add({ description = 'Later', category = 'Work', due = '2099-12-31' })
-      store.add({ description = 'Earlier', category = 'Work', due = '2050-01-01' })
+      s:add({ description = 'Earlier', category = 'Work', due = '2050-01-01' })
-      local lines, meta = views.priority_view(store.active_tasks())
+      local lines, meta = views.priority_view(s:active_tasks())
       local earlier_row, later_row
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -326,15 +353,15 @@ describe('views', function()
     end)
 
     it('formats task lines as /ID/- [ ] description', function()
-      store.add({ description = 'My task', category = 'Inbox' })
+      s:add({ description = 'My task', category = 'Inbox' })
-      local lines, _ = views.priority_view(store.active_tasks())
+      local lines, _ = views.priority_view(s:active_tasks())
       assert.are.equal('/1/- [ ] My task', lines[1])
     end)
 
     it('sets show_category=true for all task meta entries', function()
-      store.add({ description = 'T1', category = 'Work' })
+      s:add({ description = 'T1', category = 'Work' })
-      store.add({ description = 'T2', category = 'Personal' })
+      s:add({ description = 'T2', category = 'Personal' })
-      local _, meta = views.priority_view(store.active_tasks())
+      local _, meta = views.priority_view(s:active_tasks())
       for _, m in ipairs(meta) do
         if m.type == 'task' then
           assert.is_true(m.show_category == true)
@@ -343,9 +370,9 @@ describe('views', function()
     end)
 
     it('sets meta.category correctly for each task', function()
-      store.add({ description = 'Work task', category = 'Work' })
+      s:add({ description = 'Work task', category = 'Work' })
-      store.add({ description = 'Home task', category = 'Home' })
+      s:add({ description = 'Home task', category = 'Home' })
-      local lines, meta = views.priority_view(store.active_tasks())
+      local lines, meta = views.priority_view(s:active_tasks())
       local categories = {}
       for i, m in ipairs(meta) do
         if m.type == 'task' then
@@ -362,8 +389,8 @@ describe('views', function()
 
     it('marks overdue pending tasks with meta.overdue=true', function()
       local yesterday = os.date('%Y-%m-%d', os.time() - 86400)
-      local t = store.add({ description = 'Overdue', category = 'Inbox', due = yesterday })
+      local t = s:add({ description = 'Overdue', category = 'Inbox', due = yesterday })
-      local _, meta = views.priority_view(store.active_tasks())
+      local _, meta = views.priority_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' and m.id == t.id then
@@ -375,8 +402,8 @@ describe('views', function()
 
     it('does not mark future pending tasks as overdue', function()
       local tomorrow = os.date('%Y-%m-%d', os.time() + 86400)
-      local t = store.add({ description = 'Future', category = 'Inbox', due = tomorrow })
+      local t = s:add({ description = 'Future', category = 'Inbox', due = tomorrow })
-      local _, meta = views.priority_view(store.active_tasks())
+      local _, meta = views.priority_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' and m.id == t.id then
@@ -388,9 +415,9 @@ describe('views', function()
 
     it('does not mark done tasks with overdue due dates as overdue', function()
       local yesterday = os.date('%Y-%m-%d', os.time() - 86400)
-      local t = store.add({ description = 'Done late', category = 'Inbox', due = yesterday })
+      local t = s:add({ description = 'Done late', category = 'Inbox', due = yesterday })
-      store.update(t.id, { status = 'done' })
+      s:update(t.id, { status = 'done' })
-      local _, meta = views.priority_view(store.active_tasks())
+      local _, meta = views.priority_view(s:active_tasks())
       local task_meta
       for _, m in ipairs(meta) do
         if m.type == 'task' and m.id == t.id then
@@ -399,5 +426,29 @@ describe('views', function()
       end
       assert.is_falsy(task_meta.overdue)
     end)
+
+    it('includes recur in LineMeta for recurring tasks', function()
+      s:add({ description = 'Recurring', category = 'Inbox', recur = 'daily' })
+      local _, meta = views.priority_view(s:active_tasks())
+      local task_meta
+      for _, m in ipairs(meta) do
+        if m.type == 'task' then
+          task_meta = m
+        end
+      end
+      assert.are.equal('daily', task_meta.recur)
+    end)
+
+    it('has nil recur in LineMeta for non-recurring tasks', function()
+      s:add({ description = 'Normal', category = 'Inbox' })
+      local _, meta = views.priority_view(s:active_tasks())
+      local task_meta
+      for _, m in ipairs(meta) do
+        if m.type == 'task' then
+          task_meta = m
+        end
+      end
+      assert.is_nil(task_meta.recur)
+    end)
   end)
 end)