feat(file-token): file: inline metadata token with gf navigation (#45)

* feat(file-token): add file: inline metadata token with gf navigation

Problem: there was no way to link a task to a specific location in a
source file, or to quickly jump from a task to the relevant code.

Solution: add a file:<path>:<line> inline token that stores a relative
file reference in task._extra.file. Virtual text renders basename:line
in a new PendingFile highlight group. A buffer-local gf mapping
(configurable via keymaps.goto_file) opens the file at the given line.
M.add_here() lets users attach the current cursor position to any task
via vim.ui.select(). M.edit() gains -file support to clear the
reference. <Plug>(pending-goto-file) and <Plug>(pending-add-here) are
exposed for custom mappings.

* test(file-token): add parse, diff, views, edit, and navigation tests

Problem: the file: token implementation had no test coverage.

Solution: add spec/file_spec.lua covering parse.body extraction,
malformed token handling, duplicate token stop-parsing, diff
reconciliation (store/update/clear/round-trip), LineMeta population
in both views, :Pending edit -file, and goto_file notify paths for
no-file and unreadable-file cases. All 292 tests pass.

* style: apply stylua formatting

* fix(types): remove empty elseif block, fix file? annotation nullability

doc/pending.txt

@@ -30,7 +30,7 @@ concealed tokens and are never visible during editing.
 
 Features: ~
 - Oil-style buffer editing: standard Vim motions for all task operations
-- Inline metadata syntax: `due:`, `cat:`, and `rec:` tokens parsed on `:w`
+- Inline metadata syntax: `due:`, `cat:`, `rec:`, and `file:` tokens parsed on `:w`
 - Relative date input: `today`, `tomorrow`, `+Nd`, `+Nw`, `+Nm`, weekday
   names, month names, ordinals, and more
 - Recurring tasks with automatic next-date spawning on completion
@@ -101,6 +101,7 @@ Supported tokens: ~
     `due:<name>`        Resolve a named date (see |pending-dates| below).
     `cat:Name`          Move the task to the named category on save.
     `rec:<pattern>`     Set a recurrence rule (see |pending-recurrence|).
+    `file:<path>:<n>`   Attach a file reference (see |pending-file-token|).
 
 The token name for due dates defaults to `due` and is configurable via
 `date_syntax` in |pending-config|. The token name for recurrence defaults to
@@ -118,10 +119,44 @@ placed under the `Errands` category header.
 
 Parsing stops at the first token that is not a recognised metadata token.
 Repeated tokens of the same type also stop parsing — only one `due:`, one
-`cat:`, and one `rec:` per task line are consumed.
+`cat:`, one `rec:`, and one `file:` per task line are consumed.
 
-Omnifunc completion is available for all three token types. In insert mode,
+Omnifunc completion is available for `due:`, `cat:`, and `rec:` token types.
-type `due:`, `cat:`, or `rec:` and press `<C-x><C-o>` to see suggestions.
+In insert mode, type the token prefix and press `<C-x><C-o>` to see
+suggestions.
+
+==============================================================================
+FILE TOKEN                                                *pending-file-token*
+
+The `file:` inline token attaches a source file reference to a task. The
+syntax is: >
+
+    file:<relative-path>:<line-number>
+<
+
+The path is stored relative to the directory containing the data file. The
+token is rendered as virtual text at the end of the task line, showing only
+the basename and line number (e.g. `auth.lua:42`) using the |PendingFile|
+highlight group.
+
+Example: >
+
+    Fix null pointer file:src/auth.lua:42
+    Update tests file:spec/parse_spec.lua:100
+<
+
+`gf` in normal mode in the task buffer follows the file reference, opening
+the file and jumping to the specified line. The default key is `gf` and can
+be changed via the `goto_file` keymap in |pending-config|. Set it to `false`
+to disable.
+
+To attach the current file and cursor position to an existing task, invoke
+|<Plug>(pending-add-here)| from any source file. A `vim.ui.select()` picker
+lists all active tasks; selecting one records the current file and line.
+
+To clear a file reference with `:Pending edit`: >vim
+    :Pending edit 5 -file
+<
 
 ==============================================================================
 DATE INPUT                                                     *pending-dates*
@@ -292,6 +327,29 @@ COMMANDS                                                    *pending-commands*
 
     See |pending-filters| for the full list of supported predicates.
 
+                                                              *:Pending-edit*
+:Pending edit {id} [{operations}]
+    Edit metadata on an existing task without opening the buffer. {id} is the
+    numeric task ID. One or more operations follow: >vim
+        :Pending edit 5 due:tomorrow cat:Work +!
+        :Pending edit 5 -due -cat -rec
+        :Pending edit 5 rec:!weekly due:fri
+        :Pending edit 5 -file
+<
+    Operations: ~
+        `due:<date>`    Set due date (accepts all |pending-dates| vocabulary).
+        `cat:<name>`    Set category.
+        `rec:<pattern>` Set recurrence (prefix `!` for completion-based).
+        `+!`            Add priority flag.
+        `-!`            Remove priority flag.
+        `-due`          Clear due date.
+        `-cat`          Clear category.
+        `-rec`          Clear recurrence.
+        `-file`         Clear the attached file reference (see |pending-file-token|).
+
+    Tab completion is available for IDs, field names, date values, categories,
+    and recurrence patterns.
+
                                                                *:Pending-undo*
 :Pending undo
     Undo the last `:w` save, restoring the task store to its previous state.
@@ -319,6 +377,7 @@ Default buffer-local keys: ~
     `U`           Undo the last `:w` save (`undo`)
     `o`           Insert a new task line below (`open_line`)
     `O`           Insert a new task line above (`open_line_above`)
+    `gf`          Open the file attached to the task under the cursor (`goto_file`)
     `zc`          Fold the current category section (category view only)
     `zo`          Unfold the current category section (category view only)
 
@@ -420,6 +479,21 @@ All motions support count: `3]]` jumps three headers forward. `]]` and
 <Plug>(pending-prev-task)
     Jump to the previous task line, skipping headers and blanks.
 
+                                                   *<Plug>(pending-goto-file)*
+<Plug>(pending-goto-file)
+    Open the file attached to the task under the cursor. If the cursor is not
+    on a task line, or the task has no file reference, a warning is shown. If
+    the referenced file cannot be read, an error is shown.
+    See |pending-file-token|.
+
+                                                    *<Plug>(pending-add-here)*
+<Plug>(pending-add-here)
+    Attach the current file and cursor line to an existing task. Invoke from
+    any source file (not the pending buffer itself) to open a picker listing
+    all active tasks. The selected task receives a `file:` reference pointing
+    to the current buffer's file and the cursor's line number.
+    See |pending-file-token|.
+
 Example configuration: >lua
     vim.keymap.set('n', '<leader>t', '<Plug>(pending-open)')
     vim.keymap.set('n', '<leader>T', '<Plug>(pending-toggle)')
@@ -517,6 +591,7 @@ loads: >lua
         prev_header = '[[',
         next_task = ']t',
         prev_task = '[t',
+        goto_file = 'gf',
       },
       sync = {
         gcal = {
@@ -577,6 +652,11 @@ Fields: ~
                          See |pending-mappings| for the full list of actions
                          and their default keys.
 
+                         {goto_file} (string|false, default: 'gf')
+                           Open the file attached to the task under the
+                           cursor. Set to `false` to disable. See
+                           |pending-file-token|.
+
     {debug}              (boolean, default: false)
                          Enable diagnostic logging. When `true`, textobj
                          motions, mapping registration, and cursor jumps
@@ -901,6 +981,12 @@ PendingFilter       Applied to the `FILTER:` header line shown at the top of
                     the buffer when a filter is active.
                     Default: links to `DiagnosticWarn`.
 
+                                                              *PendingFile*
+PendingFile         Applied to the file reference virtual text shown for tasks
+                    that have a `file:` token attached (see |pending-file-token|).
+                    Displays the basename and line number (e.g. `auth.lua:42`).
+                    Default: links to `Directory`.
+
 To override a group in your colorscheme or config: >lua
     vim.api.nvim_set_hl(0, 'PendingDue', { fg = '#aaaaaa', italic = true })
 <

lua/pending/buffer.lua

@@ -164,6 +164,10 @@ local function apply_extmarks(bufnr, line_meta)
       if m.due then
         table.insert(virt_parts, { m.due, due_hl })
       end
+      if m.file then
+        local display = m.file:match('([^/]+:%d+)$') or m.file
+        table.insert(virt_parts, { display, 'PendingFile' })
+      end
       if #virt_parts > 0 then
         for p = 1, #virt_parts - 1 do
           virt_parts[p][1] = virt_parts[p][1] .. '  '
@@ -199,6 +203,7 @@ local function setup_highlights()
   vim.api.nvim_set_hl(0, 'PendingPriority', { link = 'DiagnosticWarn', 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, 'PendingFile', { link = 'Directory', default = true })
 end
 
 local function snapshot_folds(bufnr)

lua/pending/complete.lua

@@ -121,6 +121,7 @@ function M.omnifunc(findstart, base)
       { vim.pesc(dk) .. ':([%S]*)$', dk },
       { 'cat:([%S]*)$', 'cat' },
       { vim.pesc(rk) .. ':([%S]*)$', rk },
+      { 'file:([%S]*)$', 'file' },
     }
 
     for _, check in ipairs(checks) do

lua/pending/config.lua

@@ -22,6 +22,7 @@
 ---@field prev_header? string|false
 ---@field next_task? string|false
 ---@field prev_task? string|false
+---@field goto_file? string|false
 
 ---@class pending.Config
 ---@field data_path string

lua/pending/diff.lua

@@ -12,6 +12,7 @@ local store = require('pending.store')
 ---@field due? string
 ---@field rec? string
 ---@field rec_mode? string
+---@field file? string
 ---@field lnum integer
 
 ---@class pending.diff
@@ -57,6 +58,7 @@ function M.parse_buffer(lines)
           due = metadata.due,
           rec = metadata.rec,
           rec_mode = metadata.rec_mode,
+          file = metadata.file,
           lnum = i,
         })
       end
@@ -133,6 +135,19 @@ function M.apply(lines, hidden_ids)
           task.recur_mode = entry.rec_mode
           changed = true
         end
+        local old_file = (task._extra and task._extra.file) or nil
+        if entry.file ~= old_file then
+          task._extra = task._extra or {}
+          if entry.file then
+            task._extra.file = entry.file
+          else
+            task._extra.file = nil
+            if next(task._extra) == nil then
+              task._extra = nil
+            end
+          end
+          changed = true
+        end
         if entry.status and task.status ~= entry.status then
           task.status = entry.status
           if entry.status == 'done' then

lua/pending/init.lua

@@ -1,4 +1,5 @@
 local buffer = require('pending.buffer')
+local config = require('pending.config')
 local diff = require('pending.diff')
 local parse = require('pending.parse')
 local store = require('pending.store')
@@ -305,6 +306,16 @@ function M._setup_buf_mappings(bufnr)
       end, opts)
     end
   end
+
+  local goto_key = km.goto_file
+  if goto_key == nil then
+    goto_key = 'gf'
+  end
+  if goto_key and goto_key ~= false then
+    vim.keymap.set('n', goto_key --[[@as string]], function()
+      M.goto_file()
+    end, opts)
+  end
 end
 
 ---@param bufnr integer
@@ -629,6 +640,9 @@ local function parse_edit_token(token)
   if token == '-rec' or token == '-' .. rk then
     return 'recur', vim.NIL, nil
   end
+  if token == '-file' then
+    return 'file_clear', true, nil
+  end
 
   local due_val = token:match('^' .. vim.pesc(dk) .. ':(.+)$')
   if due_val then
@@ -673,10 +687,11 @@ local function parse_edit_token(token)
       .. dk
       .. ':<date>, cat:<name>, '
       .. rk
-      .. ':<pattern>, +!, -!, -'
+      .. ':<pattern>, file:<path>:<line>, +!, -!, -'
       .. dk
       .. ', -cat, -'
       .. rk
+      .. ', -file'
 end
 
 ---@param id_str string
@@ -755,6 +770,9 @@ function M.edit(id_str, rest)
     elseif field == 'priority' then
       updates.priority = value
       table.insert(feedback, value == 1 and 'priority added' or 'priority removed')
+    elseif field == 'file_clear' then
+      updates.file_clear = true
+      table.insert(feedback, 'file reference removed')
     end
   end
 
@@ -766,6 +784,18 @@ function M.edit(id_str, rest)
   end
 
   store.update(id, updates)
+
+  if updates.file_clear then
+    local t = store.get(id)
+    if t and t._extra then
+      t._extra.file = nil
+      if next(t._extra) == nil then
+        t._extra = nil
+      end
+      t.modified = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+    end
+  end
+
   store.save()
 
   local bufnr = buffer.bufnr()
@@ -776,6 +806,90 @@ function M.edit(id_str, rest)
   vim.notify('Task #' .. id .. ' updated: ' .. table.concat(feedback, ', '))
 end
 
+---@return nil
+function M.goto_file()
+  local bufnr = vim.api.nvim_get_current_buf()
+  if vim.bo[bufnr].filetype ~= 'pending' then
+    return
+  end
+  local lnum = vim.api.nvim_win_get_cursor(0)[1]
+  local meta = buffer.meta()
+  local m = meta and meta[lnum]
+  if not m or m.type ~= 'task' then
+    vim.notify('No task on this line', vim.log.levels.WARN)
+    return
+  end
+  local task = store.get(m.id)
+  if not task or not task._extra or not task._extra.file then
+    vim.notify('No file attached to this task', vim.log.levels.WARN)
+    return
+  end
+  local file_spec = task._extra.file
+  local rel_path, line_str = file_spec:match('^(.+):(%d+)$')
+  if not rel_path then
+    vim.notify('Invalid file spec: ' .. file_spec, vim.log.levels.ERROR)
+    return
+  end
+  local data_dir = vim.fn.fnamemodify(config.get().data_path, ':h')
+  local abs_path = data_dir .. '/' .. rel_path
+  if vim.fn.filereadable(abs_path) == 0 then
+    vim.notify('File not found: ' .. abs_path, vim.log.levels.ERROR)
+    return
+  end
+  vim.cmd.edit(abs_path)
+  local lnum_target = tonumber(line_str) or 1
+  vim.api.nvim_win_set_cursor(0, { lnum_target, 0 })
+end
+
+---@return nil
+function M.add_here()
+  local cur_bufnr = vim.api.nvim_get_current_buf()
+  if vim.bo[cur_bufnr].filetype == 'pending' then
+    vim.notify('Already in pending buffer', vim.log.levels.WARN)
+    return
+  end
+  local cur_file = vim.api.nvim_buf_get_name(cur_bufnr)
+  if cur_file == '' or vim.fn.filereadable(cur_file) == 0 then
+    vim.notify('Not editing a readable file', vim.log.levels.ERROR)
+    return
+  end
+  local cur_lnum = vim.api.nvim_win_get_cursor(0)[1]
+  local data_dir = vim.fn.fnamemodify(config.get().data_path, ':h')
+  local abs_file = vim.fn.fnamemodify(cur_file, ':p')
+  local rel_file
+  if abs_file:sub(1, #data_dir + 1) == data_dir .. '/' then
+    rel_file = abs_file:sub(#data_dir + 2)
+  else
+    rel_file = abs_file
+  end
+  local file_spec = rel_file .. ':' .. cur_lnum
+  store.load()
+  local tasks = store.active_tasks()
+  if #tasks == 0 then
+    vim.notify('No active tasks', vim.log.levels.INFO)
+    return
+  end
+  local items = {}
+  for _, task in ipairs(tasks) do
+    table.insert(items, task)
+  end
+  vim.ui.select(items, {
+    prompt = 'Attach file to task:',
+    format_item = function(task)
+      return '[' .. task.id .. '] ' .. task.description
+    end,
+  }, function(task)
+    if not task then
+      return
+    end
+    task._extra = task._extra or {}
+    task._extra.file = file_spec
+    task.modified = os.date('!%Y-%m-%dT%H:%M:%SZ') --[[@as string]]
+    store.save()
+    vim.notify('Attached ' .. file_spec .. ' to task ' .. task.id)
+  end)
+end
+
 ---@param args string
 ---@return nil
 function M.command(args)

lua/pending/parse.lua

@@ -416,7 +416,7 @@ end
 
 ---@param text string
 ---@return string description
----@return { due?: string, cat?: string, rec?: string, rec_mode?: 'scheduled'|'completion' } metadata
+---@return { due?: string, cat?: string, rec?: string, rec_mode?: 'scheduled'|'completion', file?: string? } metadata
 function M.body(text)
   local tokens = {}
   for token in text:gmatch('%S+') do
@@ -481,7 +481,18 @@ function M.body(text)
             metadata.rec = raw_spec
             i = i - 1
           else
-            break
+            local file_path_val, file_line_val = token:match('^file:(.+):(%d+)$')
+            if file_path_val and file_line_val then
+              if metadata.file then
+                break
+              end
+              metadata.file = file_path_val .. ':' .. file_line_val
+              i = i - 1
+            elseif token:match('^file:') then
+              break
+            else
+              break
+            end
           end
         end
       end
@@ -499,7 +510,7 @@ end
 
 ---@param text string
 ---@return string description
----@return { due?: string, cat?: string, rec?: string, rec_mode?: 'scheduled'|'completion' } metadata
+---@return { due?: string, cat?: string, rec?: string, rec_mode?: 'scheduled'|'completion', file?: string? } metadata
 function M.command_add(text)
   local cat_prefix = text:match('^(%S.-):%s')
   if cat_prefix then

lua/pending/views.lua

@@ -12,6 +12,7 @@ local parse = require('pending.parse')
 ---@field show_category? boolean
 ---@field priority? integer
 ---@field recur? string
+---@field file? string
 
 ---@class pending.views
 local M = {}
@@ -159,6 +160,7 @@ function M.category_view(tasks)
         overdue = task.status == 'pending' and task.due ~= nil and parse.is_overdue(task.due)
           or nil,
         recur = task.recur,
+        file = task._extra and task._extra.file or nil,
       })
     end
   end
@@ -210,6 +212,7 @@ function M.priority_view(tasks)
       overdue = task.status == 'pending' and task.due ~= nil and parse.is_overdue(task.due) or nil,
       show_category = true,
       recur = task.recur,
+      file = task._extra and task._extra.file or nil,
     })
   end
 

plugin/pending.lua

@@ -12,11 +12,13 @@ local function edit_field_candidates()
     dk .. ':',
     'cat:',
     rk .. ':',
+    'file:',
     '+!',
     '-!',
     '-' .. dk,
     '-cat',
     '-' .. rk,
+    '-file',
   }
 end
 
@@ -294,3 +296,11 @@ 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-goto-file)', function()
+  require('pending').goto_file()
+end)
+
+vim.keymap.set('n', '<Plug>(pending-add-here)', function()
+  require('pending').add_here()
+end)

spec/file_spec.lua

@@ -0,0 +1,351 @@
+require('spec.helpers')
+
+local config = require('pending.config')
+local diff = require('pending.diff')
+local parse = require('pending.parse')
+local store = require('pending.store')
+local views = require('pending.views')
+
+describe('file token', 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()
+    store.unload()
+    store.load()
+  end)
+
+  after_each(function()
+    vim.fn.delete(tmpdir, 'rf')
+    vim.g.pending = nil
+    config.reset()
+    store.unload()
+  end)
+
+  describe('parse.body', function()
+    it('extracts file token with path and line number', function()
+      local desc, meta = parse.body('Fix the bug file:src/auth.lua:42')
+      assert.are.equal('Fix the bug', desc)
+      assert.are.equal('src/auth.lua:42', meta.file)
+    end)
+
+    it('extracts file token with nested path', function()
+      local desc, meta = parse.body('Do something file:lua/pending/init.lua:100')
+      assert.are.equal('Do something', desc)
+      assert.are.equal('lua/pending/init.lua:100', meta.file)
+    end)
+
+    it('strips file token from description', function()
+      local desc, meta = parse.body('Task description file:foo.lua:1')
+      assert.are.equal('Task description', desc)
+      assert.are.equal('foo.lua:1', meta.file)
+    end)
+
+    it('stops parsing on duplicate file token', function()
+      local desc, meta = parse.body('Task file:b.lua:2 file:a.lua:1')
+      assert.are.equal('Task file:b.lua:2', desc)
+      assert.are.equal('a.lua:1', meta.file)
+    end)
+
+    it('treats malformed file token (no line number) as non-metadata', function()
+      local desc, meta = parse.body('Task file:nolineno')
+      assert.are.equal('Task file:nolineno', desc)
+      assert.is_nil(meta.file)
+    end)
+
+    it('treats file: prefix with no path as non-metadata', function()
+      local desc, meta = parse.body('Task file:')
+      assert.are.equal('Task file:', desc)
+      assert.is_nil(meta.file)
+    end)
+
+    it('handles file token alongside other metadata tokens', function()
+      local desc, meta = parse.body('Task cat:Work file:src/main.lua:10')
+      assert.are.equal('Task', desc)
+      assert.are.equal('Work', meta.cat)
+      assert.are.equal('src/main.lua:10', meta.file)
+    end)
+
+    it('does not extract file token when line number is not numeric', function()
+      local desc, meta = parse.body('Task file:src/foo.lua:abc')
+      assert.are.equal('Task file:src/foo.lua:abc', desc)
+      assert.is_nil(meta.file)
+    end)
+  end)
+
+  describe('diff reconciliation', function()
+    it('stores file field in _extra on write', function()
+      local t = store.add({ description = 'Task one' })
+      store.save()
+      local lines = {
+        '/' .. t.id .. '/- [ ] Task one file:src/auth.lua:42',
+      }
+      diff.apply(lines)
+      local updated = store.get(t.id)
+      assert.is_not_nil(updated._extra)
+      assert.are.equal('src/auth.lua:42', updated._extra.file)
+    end)
+
+    it('updates file field when token changes', function()
+      local t = store.add({ description = 'Task one', _extra = { file = 'old.lua:1' } })
+      store.save()
+      local lines = {
+        '/' .. t.id .. '/- [ ] Task one file:new.lua:99',
+      }
+      diff.apply(lines)
+      local updated = store.get(t.id)
+      assert.are.equal('new.lua:99', updated._extra.file)
+    end)
+
+    it('clears file field when token is removed from line', function()
+      local t = store.add({ description = 'Task one', _extra = { file = 'src/auth.lua:42' } })
+      store.save()
+      local lines = {
+        '/' .. t.id .. '/- [ ] Task one',
+      }
+      diff.apply(lines)
+      local updated = store.get(t.id)
+      assert.is_nil(updated._extra)
+    end)
+
+    it('preserves other _extra fields when file is cleared', function()
+      local t = store.add({
+        description = 'Task one',
+        _extra = { file = 'src/auth.lua:42', _gcal_event_id = 'abc123' },
+      })
+      store.save()
+      local lines = {
+        '/' .. t.id .. '/- [ ] Task one',
+      }
+      diff.apply(lines)
+      local updated = store.get(t.id)
+      assert.is_not_nil(updated._extra)
+      assert.is_nil(updated._extra.file)
+      assert.are.equal('abc123', updated._extra._gcal_event_id)
+    end)
+
+    it('round-trips file field through JSON', function()
+      local t = store.add({ description = 'Task one' })
+      store.save()
+      local lines = {
+        '/' .. t.id .. '/- [ ] Task one file:src/auth.lua:42',
+      }
+      diff.apply(lines)
+      store.unload()
+      store.load()
+      local loaded = store.get(t.id)
+      assert.is_not_nil(loaded._extra)
+      assert.are.equal('src/auth.lua:42', loaded._extra.file)
+    end)
+
+    it('accepts optional hidden_ids parameter without error', function()
+      local t = store.add({ description = 'Task one' })
+      store.save()
+      local lines = {
+        '/' .. t.id .. '/- [ ] Task one',
+      }
+      assert.has_no_error(function()
+        diff.apply(lines, {})
+      end)
+    end)
+  end)
+
+  describe('LineMeta', function()
+    it('category_view populates file field in LineMeta', function()
+      local t = store.add({
+        description = 'Task one',
+        _extra = { file = 'src/auth.lua:42' },
+      })
+      store.save()
+      local tasks = store.active_tasks()
+      local _, meta = views.category_view(tasks)
+      local task_meta = nil
+      for _, m in ipairs(meta) do
+        if m.type == 'task' and m.id == t.id then
+          task_meta = m
+          break
+        end
+      end
+      assert.is_not_nil(task_meta)
+      assert.are.equal('src/auth.lua:42', task_meta.file)
+    end)
+
+    it('priority_view populates file field in LineMeta', function()
+      local t = store.add({
+        description = 'Task one',
+        _extra = { file = 'src/auth.lua:42' },
+      })
+      store.save()
+      local tasks = store.active_tasks()
+      local _, meta = views.priority_view(tasks)
+      local task_meta = nil
+      for _, m in ipairs(meta) do
+        if m.type == 'task' and m.id == t.id then
+          task_meta = m
+          break
+        end
+      end
+      assert.is_not_nil(task_meta)
+      assert.are.equal('src/auth.lua:42', task_meta.file)
+    end)
+
+    it('file field is nil in LineMeta when task has no file', function()
+      local t = store.add({ description = 'Task one' })
+      store.save()
+      local tasks = store.active_tasks()
+      local _, meta = views.category_view(tasks)
+      local task_meta = nil
+      for _, m in ipairs(meta) do
+        if m.type == 'task' and m.id == t.id then
+          task_meta = m
+          break
+        end
+      end
+      assert.is_not_nil(task_meta)
+      assert.is_nil(task_meta.file)
+    end)
+  end)
+
+  describe(':Pending edit -file', function()
+    it('clears file reference from task', function()
+      local pending = require('pending')
+      local t = store.add({ description = 'Task one', _extra = { file = 'src/auth.lua:42' } })
+      store.save()
+      pending.edit(tostring(t.id), '-file')
+      local updated = store.get(t.id)
+      assert.is_nil(updated._extra)
+    end)
+
+    it('shows feedback when file reference is removed', function()
+      local pending = require('pending')
+      local t = store.add({ description = 'Task one', _extra = { file = 'src/auth.lua:42' } })
+      store.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), '-file')
+      vim.notify = orig_notify
+      assert.are.equal(1, #messages)
+      assert.truthy(messages[1].msg:find('file reference removed'))
+    end)
+
+    it('does not error when task has no file', function()
+      local pending = require('pending')
+      local t = store.add({ description = 'Task one' })
+      store.save()
+      assert.has_no_error(function()
+        pending.edit(tostring(t.id), '-file')
+      end)
+    end)
+
+    it('preserves other _extra fields when -file is used', function()
+      local pending = require('pending')
+      local t = store.add({
+        description = 'Task one',
+        _extra = { file = 'src/auth.lua:42', _gcal_event_id = 'abc' },
+      })
+      store.save()
+      pending.edit(tostring(t.id), '-file')
+      local updated = store.get(t.id)
+      assert.is_not_nil(updated._extra)
+      assert.is_nil(updated._extra.file)
+      assert.are.equal('abc', updated._extra._gcal_event_id)
+    end)
+  end)
+
+  describe('goto_file', function()
+    it('notifies warn when task has no file attached', function()
+      local pending = require('pending')
+      local buffer = require('pending.buffer')
+
+      local t = store.add({ description = 'Task one' })
+      store.save()
+
+      local bufnr = buffer.open()
+      vim.bo[bufnr].filetype = 'pending'
+      vim.api.nvim_set_current_buf(bufnr)
+
+      local meta = buffer.meta()
+      local task_lnum = nil
+      for lnum, m in ipairs(meta) do
+        if m.type == 'task' and m.id == t.id then
+          task_lnum = lnum
+          break
+        end
+      end
+      assert.is_not_nil(task_lnum)
+      vim.api.nvim_win_set_cursor(0, { task_lnum, 0 })
+
+      local messages = {}
+      local orig_notify = vim.notify
+      vim.notify = function(msg, level)
+        table.insert(messages, { msg = msg, level = level })
+      end
+
+      pending.goto_file()
+
+      vim.notify = orig_notify
+
+      local warned = false
+      for _, m in ipairs(messages) do
+        if m.level == vim.log.levels.WARN and m.msg:find('No file attached') then
+          warned = true
+        end
+      end
+      assert.is_true(warned)
+
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+
+    it('notifies error when file spec is unreadable', function()
+      local pending = require('pending')
+      local buffer = require('pending.buffer')
+
+      local t = store.add({
+        description = 'Task one',
+        _extra = { file = 'nonexistent/path.lua:1' },
+      })
+      store.save()
+
+      local bufnr = buffer.open()
+      vim.bo[bufnr].filetype = 'pending'
+      vim.api.nvim_set_current_buf(bufnr)
+
+      local meta = buffer.meta()
+      local task_lnum = nil
+      for lnum, m in ipairs(meta) do
+        if m.type == 'task' and m.id == t.id then
+          task_lnum = lnum
+          break
+        end
+      end
+      assert.is_not_nil(task_lnum)
+      vim.api.nvim_win_set_cursor(0, { task_lnum, 0 })
+
+      local messages = {}
+      local orig_notify = vim.notify
+      vim.notify = function(msg, level)
+        table.insert(messages, { msg = msg, level = level })
+      end
+
+      pending.goto_file()
+
+      vim.notify = orig_notify
+
+      local errored = false
+      for _, m in ipairs(messages) do
+        if m.level == vim.log.levels.ERROR and m.msg:find('File not found') then
+          errored = true
+        end
+      end
+      assert.is_true(errored)
+
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+  end)
+end)