.envrc

@@ -0,0 +1,3 @@
+VIRTUAL_ENV="$PWD/.venv"
+PATH_add "$VIRTUAL_ENV/bin"
+export VIRTUAL_ENV

.github/workflows/ci.yaml

@@ -0,0 +1,112 @@
+name: ci
+on:
+  workflow_call:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest
+    outputs:
+      lua: ${{ steps.changes.outputs.lua }}
+      python: ${{ steps.changes.outputs.python }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dorny/paths-filter@v3
+        id: changes
+        with:
+          filters: |
+            lua:
+              - 'lua/**'
+              - 'spec/**'
+              - 'plugin/**'
+              - 'after/**'
+              - 'ftdetect/**'
+              - '*.lua'
+              - '.luarc.json'
+              - 'stylua.toml'
+              - 'selene.toml'
+            python:
+              - 'scripts/**'
+              - 'scrapers/**'
+              - 'tests/**'
+              - 'pyproject.toml'
+              - 'uv.lock'
+
+  lua-format:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.lua == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: JohnnyMorganz/stylua-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          version: 2.1.0
+          args: --check .
+
+  lua-lint:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.lua == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: NTBBloodbath/selene-action@v1.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --display-style quiet .
+
+  lua-typecheck:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.lua == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: mrcjkb/lua-typecheck-action@v0
+        with:
+          checklevel: Warning
+          directories: lua
+          configpath: .luarc.json
+
+  python-format:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.python == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v4
+      - run: uv tool install ruff
+      - run: ruff format --check .
+
+  python-lint:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.python == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v4
+      - run: uv tool install ruff
+      - run: ruff check .
+
+  python-typecheck:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.python == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v4
+      - run: uv sync --dev
+      - run: uvx ty check .
+
+  python-test:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.python == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: astral-sh/setup-uv@v4
+      - run: uv sync --dev
+      - run: uv run camoufox fetch
+      - run: uv run pytest tests/ -v

.github/workflows/quality.yaml

@@ -28,7 +28,6 @@ jobs:
               - '*.lua'
               - '.luarc.json'
               - '*.toml'
-              - 'vim.yaml'
             python:
               - 'scripts/**/.py'
               - 'scrapers/**/*.py'
@@ -46,8 +45,11 @@ jobs:
     if: ${{ needs.changes.outputs.lua == 'true' }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v31
-      - run: nix develop --command stylua --check .
+      - uses: JohnnyMorganz/stylua-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          version: 2.1.0
+          args: --check .
 
   lua-lint:
     name: Lua Lint Check
@@ -56,8 +58,11 @@ jobs:
     if: ${{ needs.changes.outputs.lua == 'true' }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v31
-      - run: nix develop --command selene --display-style quiet .
+      - name: Lint with Selene
+        uses: NTBBloodbath/selene-action@v1.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --display-style quiet .
 
   lua-typecheck:
     name: Lua Type Check
@@ -122,5 +127,15 @@ jobs:
     if: ${{ needs.changes.outputs.markdown == 'true' }}
     steps:
       - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v31
-      - run: nix develop --command prettier --check .
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 8
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - name: Install prettier
+        run: pnpm add -g prettier@3.1.0
+      - name: Check markdown formatting with prettier
+        run: prettier --check .

.github/workflows/test.yaml

@@ -44,7 +44,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install uv
         uses: astral-sh/setup-uv@v4
-      - name: Install dependencies
+      - name: Install dependencies with pytest
         run: uv sync --dev
+      - name: Fetch camoufox data
+        run: uv run camoufox fetch
       - name: Run Python tests
         run: uv run pytest tests/ -v

.gitignore

@@ -14,7 +14,3 @@ __pycache__
 .claude/
 
 node_modules/
-
-.envrc
-.direnv/
-AI_DEBUG.md

.luarc.json

@@ -1,21 +1,8 @@
 {
-  "runtime": {
-    "version": "LuaJIT",
-    "path": ["lua/?.lua", "lua/?/init.lua"]
-  },
-  "diagnostics": {
-    "globals": ["vim"]
-  },
-  "workspace": {
-    "library": [
-      "$VIMRUNTIME/lua",
-      "${3rd}/luv/library",
-      "${3rd}/busted/library"
-    ],
-    "checkThirdParty": false,
-    "ignoreDir": [".direnv"]
-  },
-  "completion": {
-    "callSnippet": "Replace"
-  }
+  "runtime.version": "Lua 5.1",
+  "runtime.path": ["lua/?.lua", "lua/?/init.lua"],
+  "diagnostics.globals": ["vim"],
+  "workspace.library": ["$VIMRUNTIME/lua", "${3rd}/luv/library"],
+  "workspace.checkThirdParty": false,
+  "completion.callSnippet": "Replace"
 }

.styluaignore

@@ -1 +0,0 @@
-.direnv/

README.md

@@ -9,16 +9,15 @@ https://github.com/user-attachments/assets/e81d8dfb-578f-4a79-9989-210164fc0148
 
 ## Features
 
-- **Multi-platform support**: AtCoder, CodeChef, Codeforces, USACO, CSES, Kattis
-- **Online Judge Integration**: Submit problems and view contest standings
-- **Live Contest Support**: Participate in real-time contests
-- **Automatic setup**: Scrape test cases and metadata in seconds
-- **Streamlined Editing**: Configure coding view, edit test cases,
-  stress-test solutions, run interactive problems, and more
-- **Rich output**: 256 color ANSI support for compiler errors and program
+- **Multi-platform support**: AtCoder, CodeChef, Codeforces, and CSES
+- **Automatic problem setup**: Scrape test cases and metadata in seconds
+- **Dual view modes**: Lightweight I/O view for quick feedback, full panel for
+  detailed analysis
+- **Test case management**: Quickly view, edit, add, & remove test cases
+- **Rich test output**: 256 color ANSI support for compiler errors and program
   output
-- **Language agnosticism**: Configure with any language
-- **Security**: Passwords go untampered
+- **Language agnostic**: Works with any language
+- **Diff viewer**: Compare expected vs actual output with 3 diff modes
 
 ## Installation
 
@@ -29,40 +28,38 @@ Install using your package manager of choice or via
 luarocks install cp.nvim
 ```
 
-## Dependencies
+## Optional Dependencies
 
+- [uv](https://docs.astral.sh/uv/) for problem scraping
 - GNU [time](https://www.gnu.org/software/time/) and
   [timeout](https://www.gnu.org/software/coreutils/manual/html_node/timeout-invocation.html)
-- [uv](https://docs.astral.sh/uv/) or [nix](https://nixos.org/) for problem
-  scraping
 
 ## Quick Start
 
-1. Find a contest:
+cp.nvim follows a simple principle: **solve locally, submit remotely**.
 
-```
-:CP pick
-```
+### Basic Usage
 
-2. View the problem:
+1. Find a contest or problem
+2. Set up contests locally
 
-```
-:CP open
-```
+   ```
+   :CP codeforces 1848
+   ```
 
 3. Code and test
 
-```
-:CP run
-```
+   ```
+   :CP run
+   ```
 
 4. Navigate between problems
 
-```
-:CP next
-:CP prev
-:CP e1
-```
+   ```
+   :CP next
+   :CP prev
+   :CP e1
+   ```
 
 5. Debug and edit test cases
 
@@ -71,17 +68,7 @@ luarocks install cp.nvim
 :CP panel --debug
 ```
 
-6. Submit:
-
-```
-:CP submit
-```
-
-7. View contest standings:
-
-```
-:CP open standings
-```
+5. Submit on the original website
 
 ## Documentation
 
@@ -90,7 +77,7 @@ luarocks install cp.nvim
 ```
 
 See
-[my config](https://github.com/barrettruth/nix/blob/5d0ede3668eb7f5ad2b4475267fc0458f9fa4527/config/nvim/lua/plugins/dev.lua#L165)
+[my config](https://github.com/barrettruth/dots/blob/main/.config/nvim/lua/plugins/cp.lua)
 for the setup in the video shown above.
 
 ## Motivation

flake.lock

@@ -1,43 +0,0 @@
-{
-  "nodes": {
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1771008912,
-        "narHash": "sha256-gf2AmWVTs8lEq7z/3ZAsgnZDhWIckkb+ZnAo5RzSxJg=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "a82ccc39b39b621151d6732718e3e250109076fa",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "nixpkgs": "nixpkgs",
-        "systems": "systems"
-      }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1689347949,
-        "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
-        "owner": "nix-systems",
-        "repo": "default-linux",
-        "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default-linux",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}

flake.nix

@@ -1,137 +0,0 @@
-{
-  inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-    systems.url = "github:nix-systems/default-linux";
-  };
-
-  outputs =
-    {
-      self,
-      nixpkgs,
-      systems,
-    }:
-    let
-      eachSystem = nixpkgs.lib.genAttrs (import systems);
-      pkgsFor = system: nixpkgs.legacyPackages.${system};
-
-      mkPythonEnv =
-        pkgs:
-        pkgs.python312.withPackages (ps: [
-          ps.backoff
-          ps.beautifulsoup4
-          ps.httpx
-          ps.ndjson
-          ps.pydantic
-          ps.requests
-        ]);
-
-      mkDevPythonEnv =
-        pkgs:
-        pkgs.python312.withPackages (ps: [
-          ps.backoff
-          ps.beautifulsoup4
-          ps.httpx
-          ps.ndjson
-          ps.pydantic
-          ps.requests
-          ps.pytest
-          ps.pytest-mock
-        ]);
-
-      mkSubmitEnv =
-        pkgs:
-        pkgs.buildFHSEnv {
-          name = "cp-nvim-submit";
-          targetPkgs =
-            pkgs: with pkgs; [
-              uv
-              alsa-lib
-              at-spi2-atk
-              cairo
-              cups
-              dbus
-              fontconfig
-              freetype
-              gdk-pixbuf
-              glib
-              gtk3
-              libdrm
-              libxkbcommon
-              mesa
-              libGL
-              nspr
-              nss
-              pango
-              libx11
-              libxcomposite
-              libxdamage
-              libxext
-              libxfixes
-              libxrandr
-              libxcb
-              at-spi2-core
-              expat
-              libgbm
-              systemdLibs
-              zlib
-            ];
-          runScript = "${pkgs.uv}/bin/uv";
-        };
-
-      mkPlugin =
-        pkgs:
-        let
-          pythonEnv = mkPythonEnv pkgs;
-          submitEnv = mkSubmitEnv pkgs;
-        in
-        pkgs.vimUtils.buildVimPlugin {
-          pname = "cp-nvim";
-          version = "0-unstable-${self.shortRev or self.dirtyShortRev or "dev"}";
-          src = self;
-          postPatch = ''
-            substituteInPlace lua/cp/utils.lua \
-              --replace-fail "local _nix_python = nil" \
-              "local _nix_python = '${pythonEnv.interpreter}'"
-            substituteInPlace lua/cp/utils.lua \
-              --replace-fail "local _nix_submit_cmd = nil" \
-              "local _nix_submit_cmd = '${submitEnv}/bin/cp-nvim-submit'"
-          '';
-          nvimSkipModule = [
-            "cp.pickers.telescope"
-            "cp.version"
-          ];
-          passthru = { inherit pythonEnv submitEnv; };
-          meta.description = "Competitive programming plugin for Neovim";
-        };
-    in
-    {
-      overlays.default = final: prev: {
-        vimPlugins = prev.vimPlugins // {
-          cp-nvim = mkPlugin final;
-        };
-      };
-
-      packages = eachSystem (system: {
-        default = mkPlugin (pkgsFor system);
-        pythonEnv = mkPythonEnv (pkgsFor system);
-        submitEnv = mkSubmitEnv (pkgsFor system);
-      });
-
-      formatter = eachSystem (system: (pkgsFor system).nixfmt-tree);
-
-      devShells = eachSystem (system: {
-        default = (pkgsFor system).mkShell {
-          packages = with (pkgsFor system); [
-            uv
-            (mkDevPythonEnv (pkgsFor system))
-            prettier
-            ruff
-            stylua
-            selene
-            lua-language-server
-            ty
-          ];
-        };
-      });
-    };
-}

lua/cp/cache.lua

@@ -10,14 +10,11 @@
 ---@field name string
 ---@field display_name string
 ---@field url string
----@field contest_url string
----@field standings_url string
 
 ---@class ContestSummary
 ---@field display_name string
 ---@field name string
 ---@field id string
----@field start_time? integer
 
 ---@class CombinedTest
 ---@field input string
@@ -30,7 +27,6 @@
 ---@field multi_test? boolean
 ---@field memory_mb? number
 ---@field timeout_ms? number
----@field precision? number
 ---@field combined_test? CombinedTest
 ---@field test_cases TestCase[]
 
@@ -42,10 +38,12 @@
 
 local M = {}
 
+local logger = require('cp.log')
 local cache_file = vim.fn.stdpath('data') .. '/cp-nvim.json'
 local cache_data = {}
 local loaded = false
 
+--- Load the cache from disk if not done already
 ---@return nil
 function M.load()
   if loaded then
@@ -53,11 +51,7 @@ function M.load()
   end
 
   if vim.fn.filereadable(cache_file) == 0 then
-    vim.fn.mkdir(vim.fn.fnamemodify(cache_file, ':h'), 'p')
-    local tmpfile = vim.fn.tempname()
-    vim.fn.writefile({}, tmpfile)
-    vim.fn.setfperm(tmpfile, 'rw-------')
-    vim.uv.fs_rename(tmpfile, cache_file)
+    vim.fn.writefile({}, cache_file)
     loaded = true
     return
   end
@@ -70,25 +64,23 @@ function M.load()
   end
 
   local ok, decoded = pcall(vim.json.decode, table.concat(content, '\n'))
-  if ok and type(decoded) == 'table' then
+  if ok then
     cache_data = decoded
   else
-    cache_data = {}
-    M.save()
+    logger.log('Could not decode json in cache file', vim.log.levels.ERROR)
   end
   loaded = true
 end
 
+--- Save the cache to disk, overwriting existing contents
 ---@return nil
 function M.save()
   vim.schedule(function()
     vim.fn.mkdir(vim.fn.fnamemodify(cache_file, ':h'), 'p')
+
     local encoded = vim.json.encode(cache_data)
     local lines = vim.split(encoded, '\n')
-    local tmpfile = vim.fn.tempname()
-    vim.fn.writefile(lines, tmpfile)
-    vim.fn.setfperm(tmpfile, 'rw-------')
-    vim.uv.fs_rename(tmpfile, cache_file)
+    vim.fn.writefile(lines, cache_file)
   end)
 end
 
@@ -120,9 +112,7 @@ function M.get_cached_contest_ids(platform)
 
   local contest_ids = {}
   for contest_id, _ in pairs(cache_data[platform]) do
-    if contest_id:sub(1, 1) ~= '_' then
-      table.insert(contest_ids, contest_id)
-    end
+    table.insert(contest_ids, contest_id)
   end
   table.sort(contest_ids)
   return contest_ids
@@ -132,16 +122,12 @@ end
 ---@param contest_id string
 ---@param problems Problem[]
 ---@param url string
----@param contest_url string
----@param standings_url string
-function M.set_contest_data(platform, contest_id, problems, url, contest_url, standings_url)
+function M.set_contest_data(platform, contest_id, problems, url)
   vim.validate({
     platform = { platform, 'string' },
     contest_id = { contest_id, 'string' },
     problems = { problems, 'table' },
     url = { url, 'string' },
-    contest_url = { contest_url, 'string' },
-    standings_url = { standings_url, 'string' },
   })
 
   cache_data[platform] = cache_data[platform] or {}
@@ -153,8 +139,6 @@ function M.set_contest_data(platform, contest_id, problems, url, contest_url, st
     problems = problems,
     index_map = {},
     url = url,
-    contest_url = contest_url,
-    standings_url = standings_url,
   }
   for i, p in ipairs(out.problems) do
     out.index_map[p.id] = i
@@ -164,25 +148,6 @@ function M.set_contest_data(platform, contest_id, problems, url, contest_url, st
   M.save()
 end
 
----@param platform string?
----@param contest_id string?
----@param problem_id string?
----@return { problem: string|nil, contest: string|nil, standings: string|nil }|nil
-function M.get_open_urls(platform, contest_id, problem_id)
-  if not platform or not contest_id then
-    return nil
-  end
-  if not cache_data[platform] or not cache_data[platform][contest_id] then
-    return nil
-  end
-  local cd = cache_data[platform][contest_id]
-  return {
-    problem = cd.url ~= '' and problem_id and string.format(cd.url, problem_id) or nil,
-    contest = cd.contest_url ~= '' and cd.contest_url or nil,
-    standings = cd.standings_url ~= '' and cd.standings_url or nil,
-  }
-end
-
 ---@param platform string
 ---@param contest_id string
 function M.clear_contest_data(platform, contest_id)
@@ -248,7 +213,6 @@ end
 ---@param memory_mb number
 ---@param interactive boolean
 ---@param multi_test boolean
----@param precision number?
 function M.set_test_cases(
   platform,
   contest_id,
@@ -258,8 +222,7 @@ function M.set_test_cases(
   timeout_ms,
   memory_mb,
   interactive,
-  multi_test,
-  precision
+  multi_test
 )
   vim.validate({
     platform = { platform, 'string' },
@@ -271,7 +234,6 @@ function M.set_test_cases(
     memory_mb = { memory_mb, { 'number', 'nil' }, true },
     interactive = { interactive, { 'boolean', 'nil' }, true },
     multi_test = { multi_test, { 'boolean', 'nil' }, true },
-    precision = { precision, { 'number', 'nil' }, true },
   })
 
   local index = cache_data[platform][contest_id].index_map[problem_id]
@@ -282,7 +244,6 @@ function M.set_test_cases(
   cache_data[platform][contest_id].problems[index].memory_mb = memory_mb
   cache_data[platform][contest_id].problems[index].interactive = interactive
   cache_data[platform][contest_id].problems[index].multi_test = multi_test
-  cache_data[platform][contest_id].problems[index].precision = precision
 
   M.save()
 end
@@ -304,34 +265,6 @@ function M.get_constraints(platform, contest_id, problem_id)
   return problem_data.timeout_ms, problem_data.memory_mb
 end
 
----@param platform string
----@param contest_id string
----@param problem_id? string
----@return number?
-function M.get_precision(platform, contest_id, problem_id)
-  vim.validate({
-    platform = { platform, 'string' },
-    contest_id = { contest_id, 'string' },
-    problem_id = { problem_id, { 'string', 'nil' }, true },
-  })
-
-  if
-    not cache_data[platform]
-    or not cache_data[platform][contest_id]
-    or not cache_data[platform][contest_id].index_map
-  then
-    return nil
-  end
-
-  local index = cache_data[platform][contest_id].index_map[problem_id]
-  if not index then
-    return nil
-  end
-
-  local problem_data = cache_data[platform][contest_id].problems[index]
-  return problem_data and problem_data.precision or nil
-end
-
 ---@param file_path string
 ---@return FileState|nil
 function M.get_file_state(file_path)
@@ -362,70 +295,28 @@ end
 function M.get_contest_summaries(platform)
   local contest_list = {}
   for contest_id, contest_data in pairs(cache_data[platform] or {}) do
-    if type(contest_data) == 'table' and contest_id:sub(1, 1) ~= '_' then
-      table.insert(contest_list, {
-        id = contest_id,
-        name = contest_data.name,
-        display_name = contest_data.display_name,
-      })
-    end
+    table.insert(contest_list, {
+      id = contest_id,
+      name = contest_data.name,
+      display_name = contest_data.display_name,
+    })
   end
   return contest_list
 end
 
 ---@param platform string
 ---@param contests ContestSummary[]
----@param opts? { supports_countdown?: boolean }
-function M.set_contest_summaries(platform, contests, opts)
+function M.set_contest_summaries(platform, contests)
   cache_data[platform] = cache_data[platform] or {}
   for _, contest in ipairs(contests) do
     cache_data[platform][contest.id] = cache_data[platform][contest.id] or {}
-    cache_data[platform][contest.id].display_name = (
-      contest.display_name ~= vim.NIL and contest.display_name
-    ) or contest.name
+    cache_data[platform][contest.id].display_name = contest.display_name
     cache_data[platform][contest.id].name = contest.name
-    if contest.start_time and contest.start_time ~= vim.NIL then
-      cache_data[platform][contest.id].start_time = contest.start_time
-    end
-  end
-
-  if opts and opts.supports_countdown ~= nil then
-    cache_data[platform].supports_countdown = opts.supports_countdown
   end
 
   M.save()
 end
 
----@param platform string
----@return boolean?
-function M.get_supports_countdown(platform)
-  if not cache_data[platform] then
-    return nil
-  end
-  return cache_data[platform].supports_countdown
-end
-
----@param platform string
----@param contest_id string
----@return integer?
-function M.get_contest_start_time(platform, contest_id)
-  if not cache_data[platform] or not cache_data[platform][contest_id] then
-    return nil
-  end
-  return cache_data[platform][contest_id].start_time
-end
-
----@param platform string
----@param contest_id string
----@return string?
-function M.get_contest_display_name(platform, contest_id)
-  if not cache_data[platform] or not cache_data[platform][contest_id] then
-    return nil
-  end
-  return cache_data[platform][contest_id].display_name
-end
-
----@return nil
 function M.clear_all()
   cache_data = {}
   M.save()
@@ -447,9 +338,6 @@ function M.get_data_pretty()
   return vim.inspect(cache_data)
 end
 
----@return table
-function M.get_raw_cache()
-  return cache_data
-end
+M._cache = cache_data
 
 return M

lua/cp/commands/cache.lua

@@ -47,30 +47,26 @@ function M.handle_cache_command(cmd)
             constants.PLATFORM_DISPLAY_NAMES[cmd.platform],
             cmd.contest
           ),
-          { level = vim.log.levels.INFO, override = true }
+          vim.log.levels.INFO,
+          true
         )
       else
-        logger.log(
-          ("Unknown platform '%s'."):format(cmd.platform),
-          { level = vim.log.levels.ERROR }
-        )
+        logger.log(("Unknown platform '%s'."):format(cmd.platform), vim.log.levels.ERROR)
       end
     elseif cmd.platform then
       if vim.tbl_contains(platforms, cmd.platform) then
         cache.clear_platform(cmd.platform)
         logger.log(
           ("Cache cleared for platform '%s'"):format(constants.PLATFORM_DISPLAY_NAMES[cmd.platform]),
-          { level = vim.log.levels.INFO, override = true }
+          vim.log.levels.INFO,
+          true
         )
       else
-        logger.log(
-          ("Unknown platform '%s'."):format(cmd.platform),
-          { level = vim.log.levels.ERROR }
-        )
+        logger.log(("Unknown platform '%s'."):format(cmd.platform), vim.log.levels.ERROR)
       end
     else
       cache.clear_all()
-      logger.log('Cache cleared', { level = vim.log.levels.INFO, override = true })
+      logger.log('Cache cleared', vim.log.levels.INFO, true)
     end
   end
 end

lua/cp/commands/init.lua

@@ -11,36 +11,18 @@ local actions = constants.ACTIONS
 ---@field type string
 ---@field error string?
 ---@field action? string
----@field requires_context? boolean
 ---@field message? string
 ---@field contest? string
 ---@field platform? string
 ---@field problem_id? string
 ---@field interactor_cmd? string
----@field generator_cmd? string
----@field brute_cmd? string
 ---@field test_index? integer
 ---@field test_indices? integer[]
 ---@field mode? string
 ---@field debug? boolean
 ---@field language? string
----@field race? boolean
 ---@field subcommand? string
 
----@param str string
----@return string
-local function canonicalize_cf_contest(str)
-  local id = str:match('/contest/(%d+)') or str:match('/problemset/problem/(%d+)')
-  if id then
-    return id
-  end
-  local num = str:match('^(%d+)[A-Za-z]')
-  if num then
-    return num
-  end
-  return str
-end
-
 --- Turn raw args into normalized structure to later dispatch
 ---@param args string[] The raw command-line mode args
 ---@return ParsedCommand
@@ -74,23 +56,10 @@ local function parse_command(args)
     elseif first == 'interact' then
       local inter = args[2]
       if inter and inter ~= '' then
-        return {
-          type = 'action',
-          action = 'interact',
-          requires_context = true,
-          interactor_cmd = inter,
-        }
+        return { type = 'action', action = 'interact', interactor_cmd = inter }
       else
-        return { type = 'action', action = 'interact', requires_context = true }
+        return { type = 'action', action = 'interact' }
       end
-    elseif first == 'stress' then
-      return {
-        type = 'action',
-        action = 'stress',
-        requires_context = true,
-        generator_cmd = args[2],
-        brute_cmd = args[3],
-      }
     elseif first == 'edit' then
       local test_index = nil
       if #args >= 2 then
@@ -106,7 +75,7 @@ local function parse_command(args)
         end
         test_index = idx
       end
-      return { type = 'action', action = 'edit', requires_context = true, test_index = test_index }
+      return { type = 'action', action = 'edit', test_index = test_index }
     elseif first == 'run' or first == 'panel' then
       local debug = false
       local test_indices = nil
@@ -219,28 +188,10 @@ local function parse_command(args)
       return {
         type = 'action',
         action = first,
-        requires_context = true,
         test_indices = test_indices,
         debug = debug,
         mode = mode,
       }
-    elseif first == 'open' then
-      local target = args[2] or 'problem'
-      if not vim.tbl_contains({ 'problem', 'contest', 'standings' }, target) then
-        return { type = 'error', message = 'Usage: :CP open [problem|contest|standings]' }
-      end
-      return { type = 'action', action = 'open', requires_context = true, subcommand = target }
-    elseif first == 'pick' then
-      local language = nil
-      if #args >= 3 and args[2] == '--lang' then
-        language = args[3]
-      elseif #args >= 2 and args[2] ~= nil and args[2]:sub(1, 2) ~= '--' then
-        return {
-          type = 'error',
-          message = ("Unknown argument '%s' for action '%s'"):format(args[2], first),
-        }
-      end
-      return { type = 'action', action = 'pick', requires_context = false, language = language }
     else
       local language = nil
       if #args >= 3 and args[2] == '--lang' then
@@ -251,85 +202,37 @@ local function parse_command(args)
           message = ("Unknown argument '%s' for action '%s'"):format(args[2], first),
         }
       end
-      return { type = 'action', action = first, requires_context = true, language = language }
+      return { type = 'action', action = first, language = language }
     end
   end
 
   if vim.tbl_contains(platforms, first) then
     if #args == 1 then
-      return { type = 'action', action = 'pick', requires_context = false, platform = first }
-    elseif #args == 2 then
-      if args[2] == 'login' or args[2] == 'logout' or args[2] == 'signup' then
-        return { type = 'action', action = args[2], requires_context = false, platform = first }
-      end
-      local contest = args[2]
-      if first == 'codeforces' then
-        contest = canonicalize_cf_contest(contest)
-      end
       return {
-        type = 'contest_setup',
-        platform = first,
-        contest = contest,
+        type = 'error',
+        message = 'Too few arguments - specify a contest.',
       }
-    elseif #args == 3 and args[3] == '--race' then
-      local contest = args[2]
-      if first == 'codeforces' then
-        contest = canonicalize_cf_contest(contest)
-      end
+    elseif #args == 2 then
       return {
         type = 'contest_setup',
         platform = first,
-        contest = contest,
-        race = true,
+        contest = args[2],
       }
     elseif #args == 4 and args[3] == '--lang' then
-      local contest = args[2]
-      if first == 'codeforces' then
-        contest = canonicalize_cf_contest(contest)
-      end
       return {
         type = 'contest_setup',
         platform = first,
-        contest = contest,
+        contest = args[2],
         language = args[4],
       }
-    elseif #args == 5 then
-      local contest = args[2]
-      if first == 'codeforces' then
-        contest = canonicalize_cf_contest(contest)
-      end
-      local language, race = nil, false
-      if args[3] == '--race' and args[4] == '--lang' then
-        language = args[5]
-        race = true
-      elseif args[3] == '--lang' and args[5] == '--race' then
-        language = args[4]
-        race = true
-      else
-        return {
-          type = 'error',
-          message = 'Invalid arguments. Usage: :CP <platform> <contest> [--race] [--lang <language>]',
-        }
-      end
-      return {
-        type = 'contest_setup',
-        platform = first,
-        contest = contest,
-        language = language,
-        race = race,
-      }
     else
       return {
         type = 'error',
-        message = 'Invalid arguments. Usage: :CP <platform> <contest> [--race] [--lang <language>]',
+        message = 'Invalid arguments. Usage: :CP <platform> <contest> [--lang <language>]',
       }
     end
   end
 
-  if (first == 'login' or first == 'logout' or first == 'signup') and #args == 1 then
-    return { type = 'action', action = first, requires_context = true, platform = nil }
-  end
-
   if #args == 1 then
     return {
       type = 'problem_jump',
@@ -346,30 +249,13 @@ local function parse_command(args)
   return { type = 'error', message = 'Unknown command or no contest context.' }
 end
 
----@param platform string
----@return boolean
-local function check_platform_enabled(platform)
-  local cfg = require('cp.config').get_config()
-  if not cfg.platforms[platform] then
-    logger.log(
-      ("Platform '%s' is not enabled. Add it to vim.g.cp.platforms to enable it."):format(
-        constants.PLATFORM_DISPLAY_NAMES[platform] or platform
-      ),
-      { level = vim.log.levels.ERROR }
-    )
-    return false
-  end
-  return true
-end
-
 --- Core logic for handling `:CP ...` commands
----@param opts { fargs: string[] }
 ---@return nil
 function M.handle_command(opts)
   local cmd = parse_command(opts.fargs)
 
   if cmd.type == 'error' then
-    logger.log(cmd.message, { level = vim.log.levels.ERROR })
+    logger.log(cmd.message, vim.log.levels.ERROR)
     return
   end
 
@@ -377,14 +263,6 @@ function M.handle_command(opts)
     local restore = require('cp.restore')
     restore.restore_from_current_file()
   elseif cmd.type == 'action' then
-    if cmd.requires_context and not state.get_platform() then
-      local restore = require('cp.restore')
-      if not restore.restore_from_current_file() then
-        return
-      end
-      vim.cmd.redraw()
-    end
-
     local setup = require('cp.setup')
     local ui = require('cp.ui.views')
 
@@ -403,69 +281,10 @@ function M.handle_command(opts)
       setup.navigate_problem(-1, cmd.language)
     elseif cmd.action == 'pick' then
       local picker = require('cp.commands.picker')
-      picker.handle_pick_action(cmd.language, cmd.platform)
+      picker.handle_pick_action(cmd.language)
     elseif cmd.action == 'edit' then
       local edit = require('cp.ui.edit')
       edit.toggle_edit(cmd.test_index)
-    elseif cmd.action == 'stress' then
-      require('cp.stress').toggle(cmd.generator_cmd, cmd.brute_cmd)
-    elseif cmd.action == 'submit' then
-      require('cp.submit').submit({ language = cmd.language })
-    elseif cmd.action == 'open' then
-      local cache = require('cp.cache')
-      cache.load()
-      local urls =
-        cache.get_open_urls(state.get_platform(), state.get_contest_id(), state.get_problem_id())
-      local url = urls and urls[cmd.subcommand]
-      if not url or url == '' then
-        logger.log(
-          ("No URL available for '%s'"):format(cmd.subcommand),
-          { level = vim.log.levels.WARN }
-        )
-        return
-      end
-      vim.ui.open(url)
-    elseif cmd.action == 'login' then
-      local p = cmd.platform or state.get_platform()
-      if not p then
-        logger.log(
-          'No platform active. Usage: :CP <platform> login',
-          { level = vim.log.levels.ERROR }
-        )
-        return
-      end
-      if not check_platform_enabled(p) then
-        return
-      end
-      require('cp.credentials').login(p)
-    elseif cmd.action == 'logout' then
-      local p = cmd.platform or state.get_platform()
-      if not p then
-        logger.log(
-          'No platform active. Usage: :CP <platform> logout',
-          { level = vim.log.levels.ERROR }
-        )
-        return
-      end
-      if not check_platform_enabled(p) then
-        return
-      end
-      require('cp.credentials').logout(p)
-    elseif cmd.action == 'signup' then
-      local p = cmd.platform or state.get_platform()
-      if not p then
-        logger.log(
-          'No platform active. Usage: :CP <platform> signup',
-          { level = vim.log.levels.ERROR }
-        )
-        return
-      end
-      local url = constants.SIGNUP_URLS[p]
-      if not url then
-        logger.log(("No signup URL available for '%s'"):format(p), { level = vim.log.levels.WARN })
-        return
-      end
-      vim.ui.open(url)
     end
   elseif cmd.type == 'problem_jump' then
     local platform = state.get_platform()
@@ -473,7 +292,7 @@ function M.handle_command(opts)
     local problem_id = cmd.problem_id
 
     if not (platform and contest_id) then
-      logger.log('No contest is currently active.', { level = vim.log.levels.ERROR })
+      logger.log('No contest is currently active.', vim.log.levels.ERROR)
       return
     end
 
@@ -488,7 +307,7 @@ function M.handle_command(opts)
           contest_id,
           problem_id
         ),
-        { level = vim.log.levels.ERROR }
+        vim.log.levels.ERROR
       )
       return
     end
@@ -499,15 +318,8 @@ function M.handle_command(opts)
     local cache_commands = require('cp.commands.cache')
     cache_commands.handle_cache_command(cmd)
   elseif cmd.type == 'contest_setup' then
-    if not check_platform_enabled(cmd.platform) then
-      return
-    end
-    if cmd.race then
-      require('cp.race').start(cmd.platform, cmd.contest, cmd.language)
-    else
-      local setup = require('cp.setup')
-      setup.setup_contest(cmd.platform, cmd.contest, nil, cmd.language)
-    end
+    local setup = require('cp.setup')
+    setup.setup_contest(cmd.platform, cmd.contest, nil, cmd.language)
     return
   end
 end

lua/cp/commands/picker.lua

@@ -5,15 +5,14 @@ local logger = require('cp.log')
 
 --- Dispatch `:CP pick` to appropriate picker
 ---@param language? string
----@param platform? string
 ---@return nil
-function M.handle_pick_action(language, platform)
+function M.handle_pick_action(language)
   local config = config_module.get_config()
 
   if not (config.ui and config.ui.picker) then
     logger.log(
       'No picker configured. Set ui.picker = "{telescope,fzf-lua}" in your config.',
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
     return
   end
@@ -26,13 +25,13 @@ function M.handle_pick_action(language, platform)
     if not ok then
       logger.log(
         'telescope.nvim is not available. Install telescope.nvim xor change your picker config.',
-        { level = vim.log.levels.ERROR }
+        vim.log.levels.ERROR
       )
       return
     end
     local ok_cp, telescope_picker = pcall(require, 'cp.pickers.telescope')
     if not ok_cp then
-      logger.log('Failed to load telescope integration.', { level = vim.log.levels.ERROR })
+      logger.log('Failed to load telescope integration.', vim.log.levels.ERROR)
       return
     end
 
@@ -42,20 +41,20 @@ function M.handle_pick_action(language, platform)
     if not ok then
       logger.log(
         'fzf-lua is not available. Install fzf-lua or change your picker config',
-        { level = vim.log.levels.ERROR }
+        vim.log.levels.ERROR
       )
       return
     end
     local ok_cp, fzf_picker = pcall(require, 'cp.pickers.fzf_lua')
     if not ok_cp then
-      logger.log('Failed to load fzf-lua integration.', { level = vim.log.levels.ERROR })
+      logger.log('Failed to load fzf-lua integration.', vim.log.levels.ERROR)
       return
     end
 
     picker = fzf_picker
   end
 
-  picker.pick(language, platform)
+  picker.pick(language)
 end
 
 return M

lua/cp/config.lua

@@ -7,19 +7,10 @@
 ---@class CpLanguage
 ---@field extension string
 ---@field commands CpLangCommands
----@field template? string
----@field version? string
----@field submit_id? string
-
----@class CpTemplatesConfig
----@field cursor_marker? string
 
 ---@class CpPlatformOverrides
 ---@field extension? string
 ---@field commands? CpLangCommands
----@field template? string
----@field version? string
----@field submit_id? string
 
 ---@class CpPlatform
 ---@field enabled_languages string[]
@@ -29,7 +20,6 @@
 ---@class PanelConfig
 ---@field diff_modes string[]
 ---@field max_output_lines integer
----@field precision number?
 
 ---@class DiffGitConfig
 ---@field args string[]
@@ -37,23 +27,12 @@
 ---@class DiffConfig
 ---@field git DiffGitConfig
 
----@class CpSetupIOHooks
----@field input?  fun(bufnr: integer, state: cp.State)
----@field output? fun(bufnr: integer, state: cp.State)
-
----@class CpSetupHooks
----@field contest? fun(state: cp.State)
----@field code?    fun(state: cp.State)
----@field io?      CpSetupIOHooks
-
----@class CpOnHooks
----@field enter? fun(state: cp.State)
----@field run?   fun(state: cp.State)
----@field debug? fun(state: cp.State)
-
 ---@class Hooks
----@field setup? CpSetupHooks
----@field on?    CpOnHooks
+---@field before_run? fun(state: cp.State)
+---@field before_debug? fun(state: cp.State)
+---@field setup_code? fun(state: cp.State)
+---@field setup_io_input? fun(bufnr: integer, state: cp.State)
+---@field setup_io_output? fun(bufnr: integer, state: cp.State)
 
 ---@class VerdictFormatData
 ---@field index integer
@@ -82,6 +61,8 @@
 
 ---@class RunConfig
 ---@field width number
+---@field next_test_key string|nil
+---@field prev_test_key string|nil
 ---@field format_verdict VerdictFormatter
 
 ---@class EditConfig
@@ -102,16 +83,15 @@
 ---@class cp.Config
 ---@field languages table<string, CpLanguage>
 ---@field platforms table<string, CpPlatform>
----@field templates? CpTemplatesConfig
 ---@field hooks Hooks
 ---@field debug boolean
+---@field open_url boolean
 ---@field scrapers string[]
 ---@field filename? fun(contest: string, contest_id: string, problem_id?: string, config: cp.Config, language?: string): string
 ---@field ui CpUI
 ---@field runtime { effective: table<string, table<string, CpLanguage>> }  -- computed
 
 ---@class cp.PartialConfig: cp.Config
----@field platforms? table<string, CpPlatform|false>
 
 local M = {}
 
@@ -122,6 +102,7 @@ local utils = require('cp.utils')
 -- defaults per the new single schema
 ---@type cp.Config
 M.defaults = {
+  open_url = false,
   languages = {
     cpp = {
       extension = 'cc',
@@ -166,29 +147,13 @@ M.defaults = {
       enabled_languages = { 'cpp', 'python' },
       default_language = 'cpp',
     },
-    kattis = {
-      enabled_languages = { 'cpp', 'python' },
-      default_language = 'cpp',
-    },
-    usaco = {
-      enabled_languages = { 'cpp', 'python' },
-      default_language = 'cpp',
-    },
   },
   hooks = {
-    setup = {
-      contest = nil,
-      code = nil,
-      io = {
-        input = helpers.clearcol,
-        output = helpers.clearcol,
-      },
-    },
-    on = {
-      enter = nil,
-      run = nil,
-      debug = nil,
-    },
+    before_run = nil,
+    before_debug = nil,
+    setup_code = nil,
+    setup_io_input = helpers.clearcol,
+    setup_io_output = helpers.clearcol,
   },
   debug = false,
   scrapers = constants.PLATFORMS,
@@ -197,6 +162,8 @@ M.defaults = {
     ansi = true,
     run = {
       width = 0.3,
+      next_test_key = '<c-n>',
+      prev_test_key = '<c-p>',
       format_verdict = helpers.default_verdict_formatter,
     },
     edit = {
@@ -206,11 +173,7 @@ M.defaults = {
       add_test_key = 'ga',
       save_and_exit_key = 'q',
     },
-    panel = {
-      diff_modes = { 'side-by-side', 'git', 'vim' },
-      max_output_lines = 50,
-      precision = nil,
-    },
+    panel = { diff_modes = { 'side-by-side', 'git', 'vim' }, max_output_lines = 50 },
     diff = {
       git = {
         args = { 'diff', '--no-index', '--word-diff=plain', '--word-diff-regex=.', '--no-prefix' },
@@ -252,18 +215,21 @@ local function validate_language(id, lang)
     commands = { lang.commands, { 'table' } },
   })
 
-  if lang.template ~= nil then
-    vim.validate({ template = { lang.template, 'string' } })
-  end
-
   if not lang.commands.run then
     error(('[cp.nvim] languages.%s.commands.run is required'):format(id))
   end
 
   if lang.commands.build ~= nil then
     vim.validate({ build = { lang.commands.build, { 'table' } } })
-    if not has_tokens(lang.commands.build, { '{source}' }) then
-      error(('[cp.nvim] languages.%s.commands.build must include {source}'):format(id))
+    if not has_tokens(lang.commands.build, { '{source}', '{binary}' }) then
+      error(('[cp.nvim] languages.%s.commands.build must include {source} and {binary}'):format(id))
+    end
+    for _, k in ipairs({ 'run', 'debug' }) do
+      if lang.commands[k] then
+        if not has_tokens(lang.commands[k], { '{binary}' }) then
+          error(('[cp.nvim] languages.%s.commands.%s must include {binary}'):format(id, k))
+        end
+      end
     end
   else
     for _, k in ipairs({ 'run', 'debug' }) do
@@ -287,15 +253,6 @@ local function merge_lang(base, ov)
   if ov.commands then
     out.commands = vim.tbl_deep_extend('force', out.commands or {}, ov.commands or {})
   end
-  if ov.template then
-    out.template = ov.template
-  end
-  if ov.version then
-    out.version = ov.version
-  end
-  if ov.submit_id then
-    out.submit_id = ov.submit_id
-  end
   return out
 end
 
@@ -326,23 +283,6 @@ local function build_runtime(cfg)
       validate_language(lid, base)
       local eff = merge_lang(base, p.overrides and p.overrides[lid] or nil)
       validate_language(lid, eff)
-      if eff.version then
-        local normalized = eff.version:lower():gsub('%s+', '')
-        local versions = (constants.LANGUAGE_VERSIONS[plat] or {})[lid]
-        if not versions or not versions[normalized] then
-          local avail = versions and vim.tbl_keys(versions) or {}
-          table.sort(avail)
-          error(
-            ("[cp.nvim] Unknown version '%s' for %s on %s. Available: [%s]. See :help cp-submit-language"):format(
-              eff.version,
-              lid,
-              plat,
-              table.concat(avail, ', ')
-            )
-          )
-        end
-        eff.version = normalized
-      end
       cfg.runtime.effective[plat][lid] = eff
     end
   end
@@ -352,20 +292,7 @@ end
 ---@return cp.Config
 function M.setup(user_config)
   vim.validate({ user_config = { user_config, { 'table', 'nil' }, true } })
-  local defaults = vim.deepcopy(M.defaults)
-  if user_config and user_config.platforms then
-    for plat, v in pairs(user_config.platforms) do
-      if v == false then
-        defaults.platforms[plat] = nil
-      end
-    end
-  end
-  local cfg = vim.tbl_deep_extend('force', defaults, user_config or {})
-  for plat, v in pairs(cfg.platforms) do
-    if v == false then
-      cfg.platforms[plat] = nil
-    end
-  end
+  local cfg = vim.tbl_deep_extend('force', vim.deepcopy(M.defaults), user_config or {})
 
   if not next(cfg.languages) then
     error('[cp.nvim] At least one language must be configured')
@@ -375,17 +302,11 @@ function M.setup(user_config)
     error('[cp.nvim] At least one platform must be configured')
   end
 
-  if cfg.templates ~= nil then
-    vim.validate({ templates = { cfg.templates, 'table' } })
-    if cfg.templates.cursor_marker ~= nil then
-      vim.validate({ cursor_marker = { cfg.templates.cursor_marker, 'string' } })
-    end
-  end
-
   vim.validate({
     hooks = { cfg.hooks, { 'table' } },
     ui = { cfg.ui, { 'table' } },
     debug = { cfg.debug, { 'boolean', 'nil' }, true },
+    open_url = { cfg.open_url, { 'boolean', 'nil' }, true },
     filename = { cfg.filename, { 'function', 'nil' }, true },
     scrapers = {
       cfg.scrapers,
@@ -402,29 +323,12 @@ function M.setup(user_config)
       end,
       ('one of {%s}'):format(table.concat(constants.PLATFORMS, ',')),
     },
+    before_run = { cfg.hooks.before_run, { 'function', 'nil' }, true },
+    before_debug = { cfg.hooks.before_debug, { 'function', 'nil' }, true },
+    setup_code = { cfg.hooks.setup_code, { 'function', 'nil' }, true },
+    setup_io_input = { cfg.hooks.setup_io_input, { 'function', 'nil' }, true },
+    setup_io_output = { cfg.hooks.setup_io_output, { 'function', 'nil' }, true },
   })
-  if cfg.hooks.setup ~= nil then
-    vim.validate({ setup = { cfg.hooks.setup, 'table' } })
-    vim.validate({
-      contest = { cfg.hooks.setup.contest, { 'function', 'nil' }, true },
-      code = { cfg.hooks.setup.code, { 'function', 'nil' }, true },
-    })
-    if cfg.hooks.setup.io ~= nil then
-      vim.validate({ io = { cfg.hooks.setup.io, 'table' } })
-      vim.validate({
-        input = { cfg.hooks.setup.io.input, { 'function', 'nil' }, true },
-        output = { cfg.hooks.setup.io.output, { 'function', 'nil' }, true },
-      })
-    end
-  end
-  if cfg.hooks.on ~= nil then
-    vim.validate({ on = { cfg.hooks.on, 'table' } })
-    vim.validate({
-      enter = { cfg.hooks.on.enter, { 'function', 'nil' }, true },
-      run = { cfg.hooks.on.run, { 'function', 'nil' }, true },
-      debug = { cfg.hooks.on.debug, { 'function', 'nil' }, true },
-    })
-  end
 
   local layouts = require('cp.ui.layouts')
   vim.validate({
@@ -451,13 +355,6 @@ function M.setup(user_config)
       end,
       'positive integer',
     },
-    precision = {
-      cfg.ui.panel.precision,
-      function(v)
-        return v == nil or (type(v) == 'number' and v >= 0)
-      end,
-      'nil or non-negative number',
-    },
     git = { cfg.ui.diff.git, { 'table' } },
     git_args = { cfg.ui.diff.git.args, is_string_list, 'string[]' },
     width = {
@@ -467,6 +364,20 @@ function M.setup(user_config)
       end,
       'decimal between 0 and 1',
     },
+    next_test_key = {
+      cfg.ui.run.next_test_key,
+      function(v)
+        return v == nil or (type(v) == 'string' and #v > 0)
+      end,
+      'nil or non-empty string',
+    },
+    prev_test_key = {
+      cfg.ui.run.prev_test_key,
+      function(v)
+        return v == nil or (type(v) == 'string' and #v > 0)
+      end,
+      'nil or non-empty string',
+    },
     format_verdict = {
       cfg.ui.run.format_verdict,
       'function',
@@ -531,12 +442,10 @@ end
 
 local current_config = nil
 
----@param config cp.Config
 function M.set_current_config(config)
   current_config = config
 end
 
----@return cp.Config
 function M.get_config()
   return current_config or M.defaults
 end
@@ -605,10 +514,10 @@ end
 ---@param problem_id? string
 ---@return string
 local function default_filename(contest_id, problem_id)
-  if problem_id and problem_id ~= contest_id then
+  if problem_id then
     return (contest_id .. problem_id):lower()
   end
-  return (problem_id or contest_id):lower()
+  return contest_id:lower()
 end
 M.default_filename = default_filename
 

lua/cp/constants.lua

@@ -1,36 +1,13 @@
 local M = {}
 
-M.PLATFORMS = { 'atcoder', 'codechef', 'codeforces', 'cses', 'kattis', 'usaco' }
-M.ACTIONS = {
-  'run',
-  'panel',
-  'next',
-  'prev',
-  'pick',
-  'cache',
-  'interact',
-  'edit',
-  'stress',
-  'submit',
-  'open',
-}
+M.PLATFORMS = { 'atcoder', 'codechef', 'codeforces', 'cses' }
+M.ACTIONS = { 'run', 'panel', 'next', 'prev', 'pick', 'cache', 'interact', 'edit' }
 
 M.PLATFORM_DISPLAY_NAMES = {
   atcoder = 'AtCoder',
   codechef = 'CodeChef',
   codeforces = 'CodeForces',
   cses = 'CSES',
-  kattis = 'Kattis',
-  usaco = 'USACO',
-}
-
-M.SIGNUP_URLS = {
-  atcoder = 'https://atcoder.jp/register',
-  codechef = 'https://www.codechef.com/register',
-  codeforces = 'https://codeforces.com/register',
-  cses = 'https://cses.fi/register',
-  kattis = 'https://open.kattis.com/register',
-  usaco = 'https://usaco.org/index.php?page=createaccount',
 }
 
 M.CPP = 'cpp'
@@ -73,156 +50,4 @@ M.signal_codes = {
   [143] = 'SIGTERM',
 }
 
-M.LANGUAGE_VERSIONS = {
-  atcoder = {
-    cpp = { ['c++20'] = '6054', ['c++23'] = '6017', ['c++23-clang'] = '6116' },
-    python = { python3 = '6082', pypy3 = '6083', codon = '6115' },
-    java = { java = '6056' },
-    rust = { rust = '6088' },
-    c = { c23clang = '6013', c23gcc = '6014' },
-    go = { go = '6051', gccgo = '6050' },
-    haskell = { haskell = '6052' },
-    csharp = { csharp = '6015', ['csharp-aot'] = '6016' },
-    kotlin = { kotlin = '6062' },
-    ruby = { ruby = '6087', truffleruby = '6086' },
-    javascript = { bun = '6057', deno = '6058', nodejs = '6059' },
-    typescript = { deno = '6100', bun = '6101', nodejs = '6102' },
-    scala = { scala = '6090', ['scala-native'] = '6091' },
-    ocaml = { ocaml = '6073' },
-    dart = { dart = '6033' },
-    elixir = { elixir = '6038' },
-    erlang = { erlang = '6041' },
-    fsharp = { fsharp = '6042' },
-    swift = { swift = '6095' },
-    zig = { zig = '6111' },
-    nim = { nim = '6072', ['nim-old'] = '6071' },
-    lua = { lua = '6067', luajit = '6068' },
-    perl = { perl = '6076' },
-    php = { php = '6077' },
-    pascal = { pascal = '6075' },
-    crystal = { crystal = '6028' },
-    d = { dmd = '6030', gdc = '6031', ldc = '6032' },
-    julia = { julia = '6114' },
-    r = { r = '6084' },
-    commonlisp = { commonlisp = '6027' },
-    scheme = { chezscheme = '6092', gauche = '6093' },
-    clojure = { clojure = '6022', ['clojure-aot'] = '6023', babashka = '6021' },
-    ada = { ada = '6002' },
-    bash = { bash = '6008' },
-    fortran = { fortran2023 = '6047', fortran2018 = '6046', fortran77 = '6048' },
-    gleam = { gleam = '6049' },
-    lean = { lean = '6065' },
-    pony = { pony = '6079' },
-    prolog = { prolog = '6081' },
-    vala = { vala = '6106' },
-    v = { v = '6105' },
-    sql = { duckdb = '6118' },
-  },
-  codeforces = {
-    cpp = { ['c++17'] = '54', ['c++20'] = '89', ['c++23'] = '91', c11 = '43' },
-    python = { python3 = '31', pypy3 = '70', python2 = '7', pypy2 = '40', ['pypy3-old'] = '41' },
-    java = { java8 = '36', java21 = '87' },
-    kotlin = { ['1.7'] = '83', ['1.9'] = '88', ['2.2'] = '99' },
-    rust = { ['2021'] = '75', ['2024'] = '98' },
-    go = { go = '32' },
-    csharp = { mono = '9', dotnet3 = '65', dotnet6 = '79', dotnet9 = '96' },
-    haskell = { haskell = '12' },
-    javascript = { v8 = '34', nodejs = '55' },
-    ruby = { ruby = '67' },
-    scala = { scala = '20' },
-    ocaml = { ocaml = '19' },
-    d = { d = '28' },
-    perl = { perl = '13' },
-    php = { php = '6' },
-    pascal = { freepascal = '4', pascalabc = '51' },
-    fsharp = { fsharp = '97' },
-  },
-  cses = {
-    cpp = { ['c++17'] = 'C++17' },
-    python = { python3 = 'Python3', pypy3 = 'PyPy3' },
-    java = { java = 'Java' },
-    rust = { rust2021 = 'Rust2021' },
-  },
-  kattis = {
-    cpp = { ['c++17'] = 'C++', ['c++20'] = 'C++', ['c++23'] = 'C++' },
-    python = { python3 = 'Python 3', python2 = 'Python 2' },
-    java = { java = 'Java' },
-    rust = { rust = 'Rust' },
-    ada = { ada = 'Ada' },
-    algol60 = { algol60 = 'Algol 60' },
-    algol68 = { algol68 = 'Algol 68' },
-    apl = { apl = 'APL' },
-    bash = { bash = 'Bash' },
-    bcpl = { bcpl = 'BCPL' },
-    bqn = { bqn = 'BQN' },
-    c = { c = 'C' },
-    cobol = { cobol = 'COBOL' },
-    commonlisp = { commonlisp = 'Common Lisp' },
-    crystal = { crystal = 'Crystal' },
-    csharp = { csharp = 'C#' },
-    d = { d = 'D' },
-    dart = { dart = 'Dart' },
-    elixir = { elixir = 'Elixir' },
-    erlang = { erlang = 'Erlang' },
-    forth = { forth = 'Forth' },
-    fortran = { fortran = 'Fortran' },
-    fortran77 = { fortran77 = 'Fortran 77' },
-    fsharp = { fsharp = 'F#' },
-    gerbil = { gerbil = 'Gerbil' },
-    go = { go = 'Go' },
-    haskell = { haskell = 'Haskell' },
-    icon = { icon = 'Icon' },
-    javascript = { javascript = 'JavaScript (Node.js)', spidermonkey = 'JavaScript (SpiderMonkey)' },
-    julia = { julia = 'Julia' },
-    kotlin = { kotlin = 'Kotlin' },
-    lua = { lua = 'Lua' },
-    modula2 = { modula2 = 'Modula-2' },
-    nim = { nim = 'Nim' },
-    objectivec = { objectivec = 'Objective-C' },
-    ocaml = { ocaml = 'OCaml' },
-    octave = { octave = 'Octave' },
-    odin = { odin = 'Odin' },
-    pascal = { pascal = 'Pascal' },
-    perl = { perl = 'Perl' },
-    php = { php = 'PHP' },
-    pli = { pli = 'PL/I' },
-    prolog = { prolog = 'Prolog' },
-    racket = { racket = 'Racket' },
-    ruby = { ruby = 'Ruby' },
-    scala = { scala = 'Scala' },
-    simula = { simula = 'Simula 67' },
-    smalltalk = { smalltalk = 'Smalltalk' },
-    snobol = { snobol = 'SNOBOL' },
-    swift = { swift = 'Swift' },
-    typescript = { typescript = 'TypeScript' },
-    visualbasic = { visualbasic = 'Visual Basic' },
-    zig = { zig = 'Zig' },
-  },
-  usaco = {
-    cpp = { ['c++11'] = 'cpp', ['c++17'] = 'cpp' },
-    python = { python3 = 'python' },
-    java = { java = 'java' },
-  },
-  codechef = {
-    cpp = { ['c++20'] = 'C++' },
-    python = { python3 = 'PYTH 3', pypy3 = 'PYPY3' },
-    java = { java = 'JAVA' },
-    rust = { rust = 'rust' },
-    c = { c = 'C' },
-    go = { go = 'GO' },
-    kotlin = { kotlin = 'KTLN' },
-    javascript = { nodejs = 'NODEJS' },
-    typescript = { typescript = 'TS' },
-    csharp = { csharp = 'C#' },
-  },
-}
-
-M.DEFAULT_VERSIONS = { cpp = 'c++20', python = 'python3' }
-
-M.COOKIE_FILE = vim.fn.expand('~/.cache/cp-nvim/cookies.json')
-
-M.LOGIN_ERRORS = {
-  bad_credentials = 'bad credentials',
-}
-
 return M

lua/cp/credentials.lua

@@ -1,149 +0,0 @@
-local M = {}
-
-local constants = require('cp.constants')
-local git_credential = require('cp.git_credential')
-local logger = require('cp.log')
-local state = require('cp.state')
-
-local STATUS_MESSAGES = {
-  checking_login = 'Checking existing session...',
-  logging_in = 'Logging in...',
-  installing_browser = 'Installing browser...',
-}
-
----@param platform string
----@param display string
-local function prompt_and_login(platform, display)
-  vim.ui.input(
-    { prompt = '[cp.nvim]: ' .. display .. ' username (<Esc> to cancel): ' },
-    function(username)
-      if not username or username == '' then
-        logger.log(display .. ' login cancelled', { level = vim.log.levels.WARN })
-        return
-      end
-      vim.fn.inputsave()
-      local password = vim.fn.inputsecret('[cp.nvim]: ' .. display .. ' password: ')
-      vim.fn.inputrestore()
-      if not password or password == '' then
-        logger.log(display .. ' login cancelled', { level = vim.log.levels.WARN })
-        return
-      end
-
-      local credentials = { username = username, password = password }
-
-      local scraper = require('cp.scraper')
-      scraper.login(platform, credentials, function(ev)
-        vim.schedule(function()
-          local msg = STATUS_MESSAGES[ev.status] or ev.status
-          logger.log(display .. ': ' .. msg, { level = vim.log.levels.INFO, override = true })
-        end)
-      end, function(result)
-        vim.schedule(function()
-          if result.success then
-            git_credential.store(platform, credentials)
-            logger.log(
-              display .. ' login successful',
-              { level = vim.log.levels.INFO, override = true }
-            )
-          else
-            local err = result.error or 'unknown error'
-            git_credential.reject(platform, credentials)
-            logger.log(
-              display .. ' login failed: ' .. (constants.LOGIN_ERRORS[err] or err),
-              { level = vim.log.levels.ERROR }
-            )
-            prompt_and_login(platform, display)
-          end
-        end)
-      end)
-    end
-  )
-end
-
----@param platform string?
-function M.login(platform)
-  platform = platform or state.get_platform()
-  if not platform then
-    logger.log(
-      'No platform specified. Usage: :CP <platform> login',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  if not git_credential.has_helper() then
-    logger.log(
-      'No git credential helper configured. See :help cp-credentials',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  local display = constants.PLATFORM_DISPLAY_NAMES[platform] or platform
-
-  local existing = git_credential.get(platform) or {}
-
-  if existing.username and existing.password then
-    local scraper = require('cp.scraper')
-    scraper.login(platform, existing, function(ev)
-      vim.schedule(function()
-        local msg = STATUS_MESSAGES[ev.status] or ev.status
-        logger.log(display .. ': ' .. msg, { level = vim.log.levels.INFO, override = true })
-      end)
-    end, function(result)
-      vim.schedule(function()
-        if result.success then
-          logger.log(
-            display .. ' login successful',
-            { level = vim.log.levels.INFO, override = true }
-          )
-        else
-          git_credential.reject(platform, existing)
-          prompt_and_login(platform, display)
-        end
-      end)
-    end)
-    return
-  end
-
-  prompt_and_login(platform, display)
-end
-
----@param platform string?
-function M.logout(platform)
-  platform = platform or state.get_platform()
-  if not platform then
-    logger.log(
-      'No platform specified. Usage: :CP <platform> logout',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-  if not git_credential.has_helper() then
-    logger.log(
-      'No git credential helper configured. See :help cp-credentials',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  local display = constants.PLATFORM_DISPLAY_NAMES[platform] or platform
-  local existing = git_credential.get(platform)
-  if existing then
-    git_credential.reject(platform, existing)
-  end
-  local cookie_file = constants.COOKIE_FILE
-  if vim.fn.filereadable(cookie_file) == 1 then
-    local ok, data = pcall(vim.fn.json_decode, vim.fn.readfile(cookie_file, 'b'))
-    if ok and type(data) == 'table' then
-      data[platform] = nil
-      local tmpfile = vim.fn.tempname()
-      vim.fn.writefile({ vim.fn.json_encode(data) }, tmpfile)
-      vim.fn.setfperm(tmpfile, 'rw-------')
-      vim.uv.fs_rename(tmpfile, cookie_file)
-    end
-  end
-  logger.log(display .. ' credentials cleared', { level = vim.log.levels.INFO, override = true })
-end
-
-return M

lua/cp/git_credential.lua

@@ -1,107 +0,0 @@
----@class cp.Credentials
----@field username string
----@field password string
-
-local M = {}
-
-local HOSTS = {
-  atcoder = 'atcoder.jp',
-  codechef = 'www.codechef.com',
-  codeforces = 'codeforces.com',
-  cses = 'cses.fi',
-  kattis = 'open.kattis.com',
-  usaco = 'usaco.org',
-}
-
-local _helper_checked = false
-local _helper_ok = false
-
----@return boolean
-function M.has_helper()
-  if not _helper_checked then
-    local r = vim
-      .system({ 'git', 'config', 'credential.helper' }, { text = true, timeout = 5000 })
-      :wait()
-    _helper_ok = r.code == 0 and r.stdout ~= nil and vim.trim(r.stdout) ~= ''
-    _helper_checked = true
-  end
-  return _helper_ok
-end
-
----@param host string
----@param extra? table<string, string>
----@return string
-local function _build_input(host, extra)
-  local lines = { 'protocol=https', 'host=' .. host }
-  if extra then
-    for k, v in pairs(extra) do
-      table.insert(lines, k .. '=' .. v)
-    end
-  end
-  table.insert(lines, '')
-  table.insert(lines, '')
-  return table.concat(lines, '\n')
-end
-
----@param stdout string
----@return table<string, string>
-local function _parse_output(stdout)
-  local result = {}
-  for line in stdout:gmatch('[^\n]+') do
-    local k, v = line:match('^(%S+)=(.+)$')
-    if k and v then
-      result[k] = v
-    end
-  end
-  return result
-end
-
----@param platform string
----@return cp.Credentials?
-function M.get(platform)
-  local host = HOSTS[platform]
-  if not host then
-    return nil
-  end
-
-  local input = _build_input(host)
-  local obj = vim
-    .system({ 'git', 'credential', 'fill' }, { stdin = input, text = true, timeout = 5000 })
-    :wait()
-  if obj.code ~= 0 then
-    return nil
-  end
-
-  local parsed = _parse_output(obj.stdout or '')
-  if not parsed.username or not parsed.password then
-    return nil
-  end
-
-  return { username = parsed.username, password = parsed.password }
-end
-
----@param platform string
----@param creds cp.Credentials
-function M.store(platform, creds)
-  local host = HOSTS[platform]
-  if not host then
-    return
-  end
-
-  local input = _build_input(host, { username = creds.username, password = creds.password })
-  vim.system({ 'git', 'credential', 'approve' }, { stdin = input, text = true }):wait()
-end
-
----@param platform string
----@param creds cp.Credentials
-function M.reject(platform, creds)
-  local host = HOSTS[platform]
-  if not host or not creds then
-    return
-  end
-
-  local input = _build_input(host, { username = creds.username, password = creds.password })
-  vim.system({ 'git', 'credential', 'reject' }, { stdin = input, text = true }):wait()
-end
-
-return M

lua/cp/health.lua

@@ -5,19 +5,35 @@ local utils = require('cp.utils')
 local function check()
   vim.health.start('cp.nvim [required] ~')
 
-  local nvim_ver = vim.version()
-  local nvim_str = ('%d.%d.%d'):format(nvim_ver.major, nvim_ver.minor, nvim_ver.patch)
   if vim.fn.has('nvim-0.10.0') == 1 then
-    vim.health.ok('Neovim >= 0.10.0: ' .. nvim_str)
+    vim.health.ok('Neovim 0.10.0+ detected')
   else
-    vim.health.error('Neovim >= 0.10.0 required, found ' .. nvim_str)
+    vim.health.error('cp.nvim requires Neovim 0.10.0+')
   end
 
-  local uname = vim.uv.os_uname()
+  local uname = vim.loop.os_uname()
   if uname.sysname == 'Windows_NT' then
     vim.health.error('Windows is not supported')
   end
 
+  if vim.fn.executable('uv') == 1 then
+    vim.health.ok('uv executable found')
+    local r = vim.system({ 'uv', '--version' }, { text = true }):wait()
+    if r.code == 0 then
+      vim.health.info('uv version: ' .. r.stdout:gsub('\n', ''))
+    end
+  else
+    vim.health.warn('uv not found (install https://docs.astral.sh/uv/ for scraping)')
+  end
+
+  local plugin_path = utils.get_plugin_path()
+  local venv_dir = plugin_path .. '/.venv'
+  if vim.fn.isdirectory(venv_dir) == 1 then
+    vim.health.ok('Python virtual environment found at ' .. venv_dir)
+  else
+    vim.health.info('Python virtual environment not set up (created on first scrape)')
+  end
+
   local time_cap = utils.time_capability()
   if time_cap.ok then
     vim.health.ok('GNU time found: ' .. time_cap.path)
@@ -25,78 +41,14 @@ local function check()
     vim.health.error('GNU time not found: ' .. (time_cap.reason or ''))
   end
 
-  local timeout_cap = utils.timeout_capability()
+  local timeout_cap = utils.time_capability()
   if timeout_cap.ok then
     vim.health.ok('GNU timeout found: ' .. timeout_cap.path)
   else
     vim.health.error('GNU timeout not found: ' .. (timeout_cap.reason or ''))
   end
-
-  vim.health.start('cp.nvim [optional] ~')
-
-  utils.setup_python_env()
-
-  if utils.is_nix_build() then
-    local source = utils.is_nix_discovered() and 'runtime discovery' or 'flake install'
-    vim.health.ok('Nix Python environment detected (' .. source .. ')')
-    local py = utils.get_nix_python()
-    vim.health.info('Python: ' .. py)
-    local r = vim.system({ py, '--version' }, { text = true }):wait()
-    if r.code == 0 then
-      vim.health.info('Python version: ' .. r.stdout:gsub('\n', ''))
-    end
-  else
-    if vim.fn.executable('uv') == 1 then
-      vim.health.ok('uv executable found')
-      local r = vim.system({ 'uv', '--version' }, { text = true }):wait()
-      if r.code == 0 then
-        vim.health.info('uv version: ' .. r.stdout:gsub('\n', ''))
-      end
-    else
-      vim.health.warn('uv not found (install https://docs.astral.sh/uv/ for scraping)')
-    end
-
-    if vim.fn.executable('nix') == 1 then
-      vim.health.info('nix available but Python environment not resolved via nix')
-    end
-
-    local plugin_path = utils.get_plugin_path()
-    local venv_dir = plugin_path .. '/.venv'
-    if vim.fn.isdirectory(venv_dir) == 1 then
-      vim.health.ok('Python virtual environment found at ' .. venv_dir)
-    else
-      vim.health.info('Python virtual environment not set up (created on first scrape)')
-    end
-  end
-
-  if vim.fn.executable('git') == 1 then
-    local r = vim.system({ 'git', '--version' }, { text = true }):wait()
-    if r.code == 0 then
-      local major, minor, patch = r.stdout:match('(%d+)%.(%d+)%.(%d+)')
-      major, minor, patch = tonumber(major), tonumber(minor), tonumber(patch or 0)
-      local ver_str = ('%d.%d.%d'):format(major or 0, minor or 0, patch or 0)
-      if
-        major
-        and (major > 1 or (major == 1 and minor > 7) or (major == 1 and minor == 7 and patch >= 9))
-      then
-        vim.health.ok('git >= 1.7.9: ' .. ver_str)
-      else
-        vim.health.warn('git >= 1.7.9 required for credential storage, found ' .. ver_str)
-      end
-    end
-
-    local helper = vim.system({ 'git', 'config', 'credential.helper' }, { text = true }):wait()
-    if helper.code == 0 and helper.stdout and vim.trim(helper.stdout) ~= '' then
-      vim.health.ok('git credential helper: ' .. vim.trim(helper.stdout))
-    else
-      vim.health.warn('no git credential helper configured (required for login/submit)')
-    end
-  else
-    vim.health.warn('git not found (required for credential storage)')
-  end
 end
 
----@return nil
 function M.check()
   local version = require('cp.version')
   vim.health.start('cp.nvim health check ~')

lua/cp/init.lua

@@ -7,7 +7,7 @@ local logger = require('cp.log')
 M.helpers = helpers
 
 if vim.fn.has('nvim-0.10.0') == 0 then
-  logger.log('Requires nvim-0.10.0+', { level = vim.log.levels.ERROR })
+  logger.log('Requires nvim-0.10.0+', vim.log.levels.ERROR)
   return {}
 end
 
@@ -15,42 +15,23 @@ local initialized = false
 
 local function ensure_initialized()
   if initialized then
-    return true
+    return
   end
-  local user_config = vim.g.cp or {}
-  local ok, result = pcall(config_module.setup, user_config)
-  if not ok then
-    local msg = tostring(result):gsub('^.+:%d+: ', '')
-    logger.log(msg, { level = vim.log.levels.ERROR, override = true, sync = true })
-    return false
-  end
-  config_module.set_current_config(result)
+  local user_config = vim.g.cp_config or {}
+  local config = config_module.setup(user_config)
+  config_module.set_current_config(config)
   initialized = true
-  return true
 end
 
 ---@return nil
 function M.handle_command(opts)
-  if not ensure_initialized() then
-    return
-  end
+  ensure_initialized()
   local commands = require('cp.commands')
   commands.handle_command(opts)
 end
 
----@return boolean
 function M.is_initialized()
   return initialized
 end
 
----@deprecated Use `vim.g.cp` instead
----@param user_config table?
-function M.setup(user_config)
-  vim.deprecate('require("cp").setup()', 'vim.g.cp', 'v0.7.7', 'cp.nvim', false)
-
-  if user_config then
-    vim.g.cp = vim.tbl_deep_extend('force', vim.g.cp or {}, user_config)
-  end
-end
-
 return M

lua/cp/log.lua

@@ -1,27 +1,12 @@
 local M = {}
 
----@class LogOpts
----@field level? integer
----@field override? boolean
----@field sync? boolean
-
----@param msg string
----@param opts? LogOpts
-function M.log(msg, opts)
+function M.log(msg, level, override)
   local debug = require('cp.config').get_config().debug or false
-  opts = opts or {}
-  local level = opts.level or vim.log.levels.INFO
-  local override = opts.override or false
-  local sync = opts.sync or false
+  level = level or vim.log.levels.INFO
   if level >= vim.log.levels.WARN or override or debug then
-    local notify = function()
+    vim.schedule(function()
       vim.notify(('[cp.nvim]: %s'):format(msg), level)
-    end
-    if sync then
-      notify()
-    else
-      vim.schedule(notify)
-    end
+    end)
   end
 end
 

lua/cp/pickers/fzf_lua.lua

@@ -1,4 +1,3 @@
-local logger = require('cp.log')
 local picker_utils = require('cp.pickers')
 
 local M = {}
@@ -10,9 +9,9 @@ local function contest_picker(platform, refresh, language)
   local contests = picker_utils.get_platform_contests(platform, refresh)
 
   if vim.tbl_isempty(contests) then
-    logger.log(
+    vim.notify(
       ("No contests found for platform '%s'"):format(platform_display_name),
-      { level = vim.log.levels.WARN }
+      vim.log.levels.WARN
     )
     return
   end
@@ -58,18 +57,11 @@ local function contest_picker(platform, refresh, language)
   })
 end
 
----@param language? string
----@param platform? string
-function M.pick(language, platform)
-  if platform then
-    contest_picker(platform, false, language)
-    return
-  end
-
+function M.pick(language)
   local fzf = require('fzf-lua')
   local platforms = picker_utils.get_platforms()
-  local entries = vim.tbl_map(function(p)
-    return p.display_name
+  local entries = vim.tbl_map(function(platform)
+    return platform.display_name
   end, platforms)
 
   return fzf.fzf_exec(entries, {
@@ -81,16 +73,16 @@ function M.pick(language, platform)
         end
 
         local selected_name = selected[1]
-        local found = nil
+        local platform = nil
         for _, p in ipairs(platforms) do
           if p.display_name == selected_name then
-            found = p
+            platform = p
             break
           end
         end
 
-        if found then
-          contest_picker(found.id, false, language)
+        if platform then
+          contest_picker(platform.id, false, language)
         end
       end,
     },

lua/cp/pickers/init.lua

@@ -42,21 +42,23 @@ function M.get_platform_contests(platform, refresh)
   local picker_contests = cache.get_contest_summaries(platform)
 
   if refresh or vim.tbl_isempty(picker_contests) then
-    local display_name = constants.PLATFORM_DISPLAY_NAMES[platform]
     logger.log(
-      ('Fetching %s contests...'):format(display_name),
-      { level = vim.log.levels.INFO, override = true, sync = true }
+      ('Loading %s contests...'):format(constants.PLATFORM_DISPLAY_NAMES[platform]),
+      vim.log.levels.INFO,
+      true
     )
 
-    local result = scraper.scrape_contest_list(platform)
-    local contests = result and result.contests or {}
-    local sc = result and result.supports_countdown
-    cache.set_contest_summaries(platform, contests, { supports_countdown = sc })
+    local contests = scraper.scrape_contest_list(platform)
+    cache.set_contest_summaries(platform, contests)
     picker_contests = cache.get_contest_summaries(platform)
 
     logger.log(
-      ('Fetched %d %s contests.'):format(#picker_contests, display_name),
-      { level = vim.log.levels.INFO, override = true }
+      ('Loaded %d %s contests.'):format(
+        #picker_contests,
+        constants.PLATFORM_DISPLAY_NAMES[platform]
+      ),
+      vim.log.levels.INFO,
+      true
     )
   end
 

lua/cp/pickers/telescope.lua

@@ -4,7 +4,6 @@ local conf = require('telescope.config').values
 local action_state = require('telescope.actions.state')
 local actions = require('telescope.actions')
 
-local logger = require('cp.log')
 local picker_utils = require('cp.pickers')
 
 local M = {}
@@ -15,9 +14,9 @@ local function contest_picker(opts, platform, refresh, language)
   local contests = picker_utils.get_platform_contests(platform, refresh)
 
   if vim.tbl_isempty(contests) then
-    logger.log(
+    vim.notify(
       ('No contests found for platform: %s'):format(platform_display_name),
-      { level = vim.log.levels.WARN }
+      vim.log.levels.WARN
     )
     return
   end
@@ -64,14 +63,7 @@ local function contest_picker(opts, platform, refresh, language)
     :find()
 end
 
----@param language? string
----@param platform? string
-function M.pick(language, platform)
-  if platform then
-    contest_picker({}, platform, false, language)
-    return
-  end
-
+function M.pick(language)
   local opts = {}
   local platforms = picker_utils.get_platforms()
 

lua/cp/race.lua

@@ -1,305 +0,0 @@
-local M = {}
-
-local cache = require('cp.cache')
-local constants = require('cp.constants')
-local logger = require('cp.log')
-local scraper = require('cp.scraper')
-
-local REFETCH_INTERVAL_S = 600
-local RETRY_DELAY_MS = 3000
-local MAX_RETRY_ATTEMPTS = 15
-
-local race_state = {
-  timer = nil,
-  token = nil,
-  platform = nil,
-  contest_id = nil,
-  contest_name = nil,
-  language = nil,
-  start_time = nil,
-  last_refetch = nil,
-}
-
-local function format_countdown(seconds)
-  local d = math.floor(seconds / 86400)
-  local h = math.floor((seconds % 86400) / 3600)
-  local m = math.floor((seconds % 3600) / 60)
-  local s = seconds % 60
-  if d > 0 then
-    return string.format('%dd%dh%dm%ds', d, h, m, s)
-  elseif h > 0 then
-    return string.format('%dh%dm%ds', h, m, s)
-  elseif m > 0 then
-    return string.format('%dm%ds', m, s)
-  end
-  return string.format('%ds', s)
-end
-
-local function should_notify(remaining)
-  if remaining > 3600 then
-    return remaining % 900 == 0
-  end
-  if remaining > 300 then
-    return remaining % 60 == 0
-  end
-  if remaining > 60 then
-    return remaining % 10 == 0
-  end
-  return true
-end
-
-local function refetch_start_time()
-  local result = scraper.scrape_contest_list(race_state.platform)
-  if not result or not result.contests or #result.contests == 0 then
-    return
-  end
-  cache.set_contest_summaries(
-    race_state.platform,
-    result.contests,
-    { supports_countdown = result.supports_countdown }
-  )
-  local new_time = cache.get_contest_start_time(race_state.platform, race_state.contest_id)
-  if new_time and new_time ~= race_state.start_time then
-    race_state.start_time = new_time
-    race_state.contest_name = cache.get_contest_display_name(
-      race_state.platform,
-      race_state.contest_id
-    ) or race_state.contest_id
-  end
-end
-
-local function race_try_setup(platform, contest_id, language, attempt, token)
-  if race_state.token ~= token then
-    return
-  end
-
-  cache.load()
-  local cd = cache.get_contest_data(platform, contest_id)
-  if
-    cd
-    and type(cd.problems) == 'table'
-    and #cd.problems > 0
-    and type(cd.index_map) == 'table'
-    and next(cd.index_map) ~= nil
-  then
-    require('cp.setup').setup_contest(platform, contest_id, nil, language)
-    return
-  end
-
-  local display = constants.PLATFORM_DISPLAY_NAMES[platform] or platform
-  if attempt > 1 then
-    logger.log(
-      ('Retrying %s "%s" setup (attempt %d/%d)...'):format(
-        display,
-        contest_id,
-        attempt,
-        MAX_RETRY_ATTEMPTS
-      ),
-      { level = vim.log.levels.WARN }
-    )
-  end
-
-  scraper.scrape_contest_metadata(
-    platform,
-    contest_id,
-    vim.schedule_wrap(function(data)
-      if race_state.token ~= token then
-        return
-      end
-      cache.set_contest_data(
-        platform,
-        contest_id,
-        data.problems or {},
-        data.url or '',
-        data.contest_url or '',
-        data.standings_url or ''
-      )
-      require('cp.setup').setup_contest(platform, contest_id, nil, language)
-    end),
-    vim.schedule_wrap(function()
-      if race_state.token ~= token then
-        return
-      end
-      if attempt >= MAX_RETRY_ATTEMPTS then
-        logger.log(
-          ('Failed to load %s contest "%s" after %d attempts'):format(display, contest_id, attempt),
-          { level = vim.log.levels.ERROR }
-        )
-        return
-      end
-      vim.defer_fn(function()
-        race_try_setup(platform, contest_id, language, attempt + 1, token)
-      end, RETRY_DELAY_MS)
-    end)
-  )
-end
-
----@param platform string
----@param contest_id string
----@param language? string
-function M.start(platform, contest_id, language)
-  if not platform or not vim.tbl_contains(constants.PLATFORMS, platform) then
-    logger.log('Invalid platform', { level = vim.log.levels.ERROR })
-    return
-  end
-  if not contest_id or contest_id == '' then
-    logger.log('Contest ID required', { level = vim.log.levels.ERROR })
-    return
-  end
-  if race_state.timer then
-    M.stop()
-  end
-
-  cache.load()
-
-  local display = constants.PLATFORM_DISPLAY_NAMES[platform] or platform
-  local cached_countdown = cache.get_supports_countdown(platform)
-  if cached_countdown == false then
-    logger.log(('%s does not support --race'):format(display), { level = vim.log.levels.ERROR })
-    return
-  end
-
-  local start_time = cache.get_contest_start_time(platform, contest_id)
-
-  if not start_time then
-    logger.log(
-      'Fetching contest list...',
-      { level = vim.log.levels.INFO, override = true, sync = true }
-    )
-    local result = scraper.scrape_contest_list(platform)
-    if result then
-      local sc = result.supports_countdown
-      if sc == false then
-        cache.set_contest_summaries(platform, result.contests or {}, { supports_countdown = false })
-        logger.log(('%s does not support --race'):format(display), { level = vim.log.levels.ERROR })
-        return
-      end
-      if result.contests and #result.contests > 0 then
-        cache.set_contest_summaries(platform, result.contests, { supports_countdown = sc })
-        start_time = cache.get_contest_start_time(platform, contest_id)
-      end
-    end
-  end
-
-  if not start_time then
-    logger.log(
-      ('No start time found for %s contest "%s"'):format(display, contest_id),
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  local token = vim.uv.hrtime()
-  local remaining = start_time - os.time()
-  if remaining <= 0 then
-    logger.log(
-      'Contest has already started, setting up...',
-      { level = vim.log.levels.INFO, override = true }
-    )
-    race_state.token = token
-    race_try_setup(platform, contest_id, language, 1, token)
-    return
-  end
-
-  race_state.platform = platform
-  race_state.contest_id = contest_id
-  race_state.contest_name = cache.get_contest_display_name(platform, contest_id) or contest_id
-  race_state.language = language
-  race_state.start_time = start_time
-  race_state.last_refetch = os.time()
-  race_state.token = token
-
-  logger.log(
-    ('%s race "%s" starts in %s'):format(
-      display,
-      race_state.contest_name,
-      format_countdown(remaining)
-    ),
-    { level = vim.log.levels.INFO, override = true }
-  )
-
-  local timer = vim.uv.new_timer()
-  race_state.timer = timer
-  timer:start(
-    0,
-    1000,
-    vim.schedule_wrap(function()
-      if race_state.token ~= token then
-        return
-      end
-
-      local now = os.time()
-      if now - race_state.last_refetch >= REFETCH_INTERVAL_S then
-        race_state.last_refetch = now
-        refetch_start_time()
-      end
-
-      local r = race_state.start_time - now
-      if r <= 0 then
-        timer:stop()
-        timer:close()
-        race_state.timer = nil
-        local p = race_state.platform
-        local c = race_state.contest_id
-        local l = race_state.language
-        race_state.platform = nil
-        race_state.contest_id = nil
-        race_state.contest_name = nil
-        race_state.language = nil
-        race_state.start_time = nil
-        race_state.last_refetch = nil
-        logger.log('Contest started!', { level = vim.log.levels.INFO, override = true })
-        race_try_setup(p, c, l, 1, token)
-      elseif should_notify(r) then
-        logger.log(
-          ('%s race "%s" starts in %s'):format(
-            constants.PLATFORM_DISPLAY_NAMES[race_state.platform] or race_state.platform,
-            race_state.contest_name,
-            format_countdown(r)
-          ),
-          { level = vim.log.levels.INFO, override = true }
-        )
-      end
-    end)
-  )
-end
-
----@return nil
-function M.stop()
-  local timer = race_state.timer
-  if not timer then
-    logger.log('No active race', { level = vim.log.levels.WARN })
-    return
-  end
-  local display = constants.PLATFORM_DISPLAY_NAMES[race_state.platform] or race_state.platform
-  local name = race_state.contest_name or race_state.contest_id
-  timer:stop()
-  timer:close()
-  race_state.timer = nil
-  race_state.token = nil
-  race_state.platform = nil
-  race_state.contest_id = nil
-  race_state.contest_name = nil
-  race_state.language = nil
-  race_state.start_time = nil
-  race_state.last_refetch = nil
-  logger.log(
-    ('Cancelled %s race "%s"'):format(display, name),
-    { level = vim.log.levels.INFO, override = true }
-  )
-end
-
----@return { active: boolean, platform?: string, contest_id?: string, remaining_seconds?: integer }
-function M.status()
-  if not race_state.timer or not race_state.start_time then
-    return { active = false }
-  end
-  return {
-    active = true,
-    platform = race_state.platform,
-    contest_id = race_state.contest_id,
-    remaining_seconds = math.max(0, race_state.start_time - os.time()),
-  }
-end
-
-return M

lua/cp/restore.lua

@@ -11,7 +11,7 @@ function M.restore_from_current_file()
   local current_file = (vim.uv.fs_realpath(vim.fn.expand('%:p')) or vim.fn.expand('%:p'))
   local file_state = cache.get_file_state(current_file)
   if not file_state then
-    logger.log('No cached state found for current file.', { level = vim.log.levels.ERROR })
+    logger.log('No cached state found for current file.', vim.log.levels.ERROR)
     return false
   end
 

lua/cp/runner/execute.lua

@@ -33,9 +33,6 @@ local function substitute_template(cmd_template, substitutions)
   return out
 end
 
----@param cmd_template string[]
----@param substitutions SubstitutableCommand
----@return string[]
 function M.build_command(cmd_template, substitutions)
   return substitute_template(cmd_template, substitutions)
 end
@@ -46,7 +43,6 @@ end
 function M.compile(compile_cmd, substitutions, on_complete)
   local cmd = substitute_template(compile_cmd, substitutions)
   local sh = table.concat(cmd, ' ') .. ' 2>&1'
-  logger.log('compile: ' .. sh)
 
   local t0 = vim.uv.hrtime()
   vim.system({ 'sh', '-c', sh }, { text = false }, function(r)
@@ -55,7 +51,7 @@ function M.compile(compile_cmd, substitutions, on_complete)
     r.stdout = ansi.bytes_to_string(r.stdout or '')
 
     if r.code == 0 then
-      logger.log(('Compilation successful in %.1fms.'):format(dt), { level = vim.log.levels.INFO })
+      logger.log(('Compilation successful in %.1fms.'):format(dt), vim.log.levels.INFO)
     else
       logger.log(('Compilation failed in %.1fms.'):format(dt))
     end
@@ -123,7 +119,6 @@ function M.run(cmd, stdin, timeout_ms, memory_mb, on_complete)
   local sec = math.ceil(timeout_ms / 1000)
   local timeout_prefix = ('%s -k 1s %ds '):format(timeout_bin, sec)
   local sh = prefix .. timeout_prefix .. ('%s -v sh -c %q 2>&1'):format(time_bin, prog)
-  logger.log('run: ' .. sh)
 
   local t0 = vim.uv.hrtime()
   vim.system({ 'sh', '-c', sh }, { stdin = stdin, text = true }, function(r)

lua/cp/runner/run.lua

@@ -19,7 +19,6 @@
 ---@class ProblemConstraints
 ---@field timeout_ms number
 ---@field memory_mb number
----@field precision number?
 
 ---@class PanelState
 ---@field test_cases RanTestCase[]
@@ -57,8 +56,7 @@ local function load_constraints_from_cache(platform, contest_id, problem_id)
   cache.load()
   local timeout_ms, memory_mb = cache.get_constraints(platform, contest_id, problem_id)
   if timeout_ms and memory_mb then
-    local precision = cache.get_precision(platform, contest_id, problem_id)
-    return { timeout_ms = timeout_ms, memory_mb = memory_mb, precision = precision }
+    return { timeout_ms = timeout_ms, memory_mb = memory_mb }
   end
   return nil
 end
@@ -101,53 +99,6 @@ local function build_command(cmd, substitutions)
   return execute.build_command(cmd, substitutions)
 end
 
----@param actual string
----@param expected string
----@param precision number?
----@return boolean
-local function compare_outputs(actual, expected, precision)
-  local norm_actual = normalize_lines(actual)
-  local norm_expected = normalize_lines(expected)
-
-  if precision == nil or precision == 0 then
-    return norm_actual == norm_expected
-  end
-
-  local actual_lines = vim.split(norm_actual, '\n', { plain = true })
-  local expected_lines = vim.split(norm_expected, '\n', { plain = true })
-
-  if #actual_lines ~= #expected_lines then
-    return false
-  end
-
-  for i = 1, #actual_lines do
-    local a_tokens = vim.split(actual_lines[i], '%s+', { plain = false, trimempty = true })
-    local e_tokens = vim.split(expected_lines[i], '%s+', { plain = false, trimempty = true })
-
-    if #a_tokens ~= #e_tokens then
-      return false
-    end
-
-    for j = 1, #a_tokens do
-      local a_tok, e_tok = a_tokens[j], e_tokens[j]
-      local a_num = tonumber(a_tok)
-      local e_num = tonumber(e_tok)
-
-      if a_num ~= nil and e_num ~= nil then
-        if math.abs(a_num - e_num) > precision then
-          return false
-        end
-      else
-        if a_tok ~= e_tok then
-          return false
-        end
-      end
-    end
-  end
-
-  return true
-end
-
 ---@param test_case RanTestCase
 ---@param debug boolean?
 ---@param on_complete fun(result: { status: "pass"|"fail"|"tle"|"mle", actual: string, actual_highlights: Highlight[], error: string, stderr: string, time_ms: number, code: integer, ok: boolean, signal: string?, tled: boolean, mled: boolean, rss_mb: number })
@@ -192,9 +143,7 @@ local function run_single_test_case(test_case, debug, on_complete)
     end
 
     local expected = test_case.expected or ''
-    local precision = (panel_state.constraints and panel_state.constraints.precision)
-      or config.ui.panel.precision
-    local ok = compare_outputs(out, expected, precision)
+    local ok = normalize_lines(out) == normalize_lines(expected)
 
     local signal = r.signal
     if not signal and r.code and r.code >= 128 then
@@ -245,7 +194,7 @@ function M.load_test_cases()
     state.get_problem_id()
   )
 
-  logger.log(('Loaded %d test case(s)'):format(#tcs), { level = vim.log.levels.INFO })
+  logger.log(('Loaded %d test case(s)'):format(#tcs), vim.log.levels.INFO)
   return #tcs > 0
 end
 
@@ -259,7 +208,7 @@ function M.run_combined_test(debug, on_complete)
   )
 
   if not combined then
-    logger.log('No combined test found', { level = vim.log.levels.ERROR })
+    logger.log('No combined test found', vim.log.levels.ERROR)
     on_complete(nil)
     return
   end
@@ -327,33 +276,26 @@ function M.run_all_test_cases(indices, debug, on_each, on_done)
     end
   end
 
-  if #to_run == 0 then
-    logger.log(
-      ('Finished %s %d test cases.'):format(debug and 'debugging' or 'running', 0),
-      { level = vim.log.levels.INFO, override = true }
-    )
-    on_done(panel_state.test_cases)
-    return
-  end
+  local function run_next(pos)
+    if pos > #to_run then
+      logger.log(
+        ('Finished %s %d test cases.'):format(debug and 'debugging' or 'running', #to_run),
+        vim.log.levels.INFO,
+        true
+      )
+      on_done(panel_state.test_cases)
+      return
+    end
 
-  local total = #to_run
-  local remaining = total
-
-  for _, idx in ipairs(to_run) do
-    M.run_test_case(idx, debug, function()
+    M.run_test_case(to_run[pos], debug, function()
       if on_each then
-        on_each(idx, total)
-      end
-      remaining = remaining - 1
-      if remaining == 0 then
-        logger.log(
-          ('Finished %s %d test cases.'):format(debug and 'debugging' or 'running', total),
-          { level = vim.log.levels.INFO, override = true }
-        )
-        on_done(panel_state.test_cases)
+        on_each(pos, #to_run)
       end
+      run_next(pos + 1)
     end)
   end
+
+  run_next(1)
 end
 
 ---@return PanelState

lua/cp/runner/run_render.lua

@@ -376,7 +376,6 @@ function M.get_highlight_groups()
   }
 end
 
----@return nil
 function M.setup_highlights()
   local groups = M.get_highlight_groups()
   for name, opts in pairs(groups) do

lua/cp/scraper.lua

@@ -5,141 +5,55 @@ local logger = require('cp.log')
 local utils = require('cp.utils')
 
 local function syshandle(result)
-  local ok, data = pcall(vim.json.decode, result.stdout or '')
-  if ok then
-    return { success = true, data = data }
-  end
-
   if result.code ~= 0 then
     local msg = 'Scraper failed: ' .. (result.stderr or 'Unknown error')
     return { success = false, error = msg }
   end
 
-  local msg = 'Failed to parse scraper output: ' .. tostring(data)
-  logger.log(msg, { level = vim.log.levels.ERROR })
-  return { success = false, error = msg }
-end
-
----@param env_map table<string, string>
----@return string[]
-local function spawn_env_list(env_map)
-  local out = {}
-  for key, value in pairs(env_map) do
-    out[#out + 1] = tostring(key) .. '=' .. tostring(value)
+  local ok, data = pcall(vim.json.decode, result.stdout)
+  if not ok then
+    local msg = 'Failed to parse scraper output: ' .. tostring(data)
+    logger.log(msg, vim.log.levels.ERROR)
+    return { success = false, error = msg }
   end
-  return out
+
+  return { success = true, data = data }
 end
 
 ---@param platform string
 ---@param subcommand string
 ---@param args string[]
----@param opts { sync?: boolean, ndjson?: boolean, on_event?: fun(ev: table), on_exit?: fun(result: table), env_extra?: table<string, string>, stdin?: string }
+---@param opts { sync?: boolean, ndjson?: boolean, on_event?: fun(ev: table), on_exit?: fun(result: table) }
 local function run_scraper(platform, subcommand, args, opts)
-  if not utils.setup_python_env() then
-    local msg = 'no Python environment available (install uv or nix)'
-    logger.log(msg, { level = vim.log.levels.ERROR })
-    if opts and opts.on_exit then
-      opts.on_exit({ success = false, error = msg })
-    end
-    return { success = false, error = msg }
-  end
-
-  local needs_browser = subcommand == 'submit'
-    or subcommand == 'login'
-    or (platform == 'codeforces' and (subcommand == 'metadata' or subcommand == 'tests'))
-
-  if needs_browser then
-    utils.setup_nix_submit_env()
-  end
-
   local plugin_path = utils.get_plugin_path()
-  local cmd
-  if needs_browser then
-    cmd = utils.get_python_submit_cmd(platform, plugin_path)
-  else
-    cmd = utils.get_python_cmd(platform, plugin_path)
-  end
-  vim.list_extend(cmd, { subcommand })
+  local cmd = { 'uv', 'run', '--directory', plugin_path, '-m', 'scrapers.' .. platform, subcommand }
   vim.list_extend(cmd, args)
 
-  logger.log('scraper cmd: ' .. table.concat(cmd, ' '))
-
   local env = vim.fn.environ()
   env.VIRTUAL_ENV = ''
   env.PYTHONPATH = ''
   env.CONDA_PREFIX = ''
 
-  if opts and opts.env_extra then
-    for k, v in pairs(opts.env_extra) do
-      env[k] = v
-    end
-  end
-
-  if needs_browser and utils.is_nix_build() then
-    env.UV_PROJECT_ENVIRONMENT = vim.fn.stdpath('cache') .. '/cp-nvim/submit-env'
-  end
-
   if opts and opts.ndjson then
-    local uv = vim.uv
-    local stdin_pipe = nil
-    if opts.stdin then
-      stdin_pipe = uv.new_pipe(false)
-    end
+    local uv = vim.loop
     local stdout = uv.new_pipe(false)
     local stderr = uv.new_pipe(false)
     local buf = ''
 
-    local timer = nil
     local handle
-    handle = uv.spawn(cmd[1], {
-      args = vim.list_slice(cmd, 2),
-      stdio = { stdin_pipe, stdout, stderr },
-      env = spawn_env_list(env),
-      cwd = plugin_path,
-    }, function(code, signal)
-      if timer and not timer:is_closing() then
-        timer:stop()
-        timer:close()
-      end
-      if buf ~= '' and opts.on_event then
-        local ok_tail, ev_tail = pcall(vim.json.decode, buf)
-        if ok_tail then
-          opts.on_event(ev_tail)
+    handle = uv.spawn(
+      cmd[1],
+      { args = vim.list_slice(cmd, 2), stdio = { nil, stdout, stderr }, env = env },
+      function(code, signal)
+        if buf ~= '' and opts.on_event then
+          local ok_tail, ev_tail = pcall(vim.json.decode, buf)
+          if ok_tail then
+            opts.on_event(ev_tail)
+          end
+          buf = ''
         end
-        buf = ''
-      end
-      if opts.on_exit then
-        opts.on_exit({ success = (code == 0), code = code, signal = signal })
-      end
-      if stdin_pipe and not stdin_pipe:is_closing() then
-        stdin_pipe:close()
-      end
-      if not stdout:is_closing() then
-        stdout:close()
-      end
-      if not stderr:is_closing() then
-        stderr:close()
-      end
-      if handle and not handle:is_closing() then
-        handle:close()
-      end
-    end)
-
-    if not handle then
-      if stdin_pipe and not stdin_pipe:is_closing() then
-        stdin_pipe:close()
-      end
-      logger.log('Failed to start scraper process', { level = vim.log.levels.ERROR })
-      return { success = false, error = 'spawn failed' }
-    end
-
-    if needs_browser then
-      timer = uv.new_timer()
-      timer:start(120000, 0, function()
-        timer:stop()
-        timer:close()
-        if stdin_pipe and not stdin_pipe:is_closing() then
-          stdin_pipe:close()
+        if opts.on_exit then
+          opts.on_exit({ success = (code == 0), code = code, signal = signal })
         end
         if not stdout:is_closing() then
           stdout:close()
@@ -148,21 +62,14 @@ local function run_scraper(platform, subcommand, args, opts)
           stderr:close()
         end
         if handle and not handle:is_closing() then
-          handle:kill(15)
           handle:close()
         end
-        if opts.on_exit then
-          opts.on_exit({ success = false, error = 'submit timed out' })
-        end
-      end)
-    end
+      end
+    )
 
-    if stdin_pipe then
-      uv.write(stdin_pipe, opts.stdin, function()
-        uv.shutdown(stdin_pipe, function()
-          stdin_pipe:close()
-        end)
-      end)
+    if not handle then
+      logger.log('Failed to start scraper process', vim.log.levels.ERROR)
+      return { success = false, error = 'spawn failed' }
     end
 
     uv.read_start(stdout, function(_, data)
@@ -195,15 +102,7 @@ local function run_scraper(platform, subcommand, args, opts)
     return
   end
 
-  local sysopts = {
-    text = true,
-    timeout = needs_browser and 120000 or 30000,
-    env = env,
-    cwd = plugin_path,
-  }
-  if opts and opts.stdin then
-    sysopts.stdin = opts.stdin
-  end
+  local sysopts = { text = true, timeout = 30000, env = env }
   if opts and opts.sync then
     local result = vim.system(cmd, sysopts):wait()
     return syshandle(result)
@@ -216,11 +115,7 @@ local function run_scraper(platform, subcommand, args, opts)
   end
 end
 
----@param platform string
----@param contest_id string
----@param callback fun(data: table)?
----@param on_error fun()?
-function M.scrape_contest_metadata(platform, contest_id, callback, on_error)
+function M.scrape_contest_metadata(platform, contest_id, callback)
   run_scraper(platform, 'metadata', { contest_id }, {
     on_exit = function(result)
       if not result or not result.success then
@@ -229,11 +124,8 @@ function M.scrape_contest_metadata(platform, contest_id, callback, on_error)
             constants.PLATFORM_DISPLAY_NAMES[platform],
             contest_id
           ),
-          { level = vim.log.levels.ERROR }
+          vim.log.levels.ERROR
         )
-        if type(on_error) == 'function' then
-          on_error()
-        end
         return
       end
       local data = result.data or {}
@@ -243,11 +135,8 @@ function M.scrape_contest_metadata(platform, contest_id, callback, on_error)
             constants.PLATFORM_DISPLAY_NAMES[platform],
             contest_id
           ),
-          { level = vim.log.levels.ERROR }
+          vim.log.levels.ERROR
         )
-        if type(on_error) == 'function' then
-          on_error()
-        end
         return
       end
       if type(callback) == 'function' then
@@ -257,8 +146,6 @@ function M.scrape_contest_metadata(platform, contest_id, callback, on_error)
   })
 end
 
----@param platform string
----@return { contests: ContestSummary[], supports_countdown: boolean }?
 function M.scrape_contest_list(platform)
   local result = run_scraper(platform, 'contests', {}, { sync = true })
   if not result or not result.success or not (result.data and result.data.contests) then
@@ -267,28 +154,19 @@ function M.scrape_contest_list(platform)
         platform,
         (result and result.error) or 'unknown'
       ),
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
-    return nil
+    return {}
   end
-  return {
-    contests = result.data.contests,
-    supports_countdown = result.data.supports_countdown ~= false,
-  }
+  return result.data.contests
 end
 
 ---@param platform string
 ---@param contest_id string
 ---@param callback fun(data: table)|nil
----@param on_done fun()|nil
-function M.scrape_all_tests(platform, contest_id, callback, on_done)
+function M.scrape_all_tests(platform, contest_id, callback)
   run_scraper(platform, 'tests', { contest_id }, {
     ndjson = true,
-    on_exit = function()
-      if type(on_done) == 'function' then
-        vim.schedule(on_done)
-      end
-    end,
     on_event = function(ev)
       if ev.done then
         return
@@ -300,7 +178,7 @@ function M.scrape_all_tests(platform, contest_id, callback, on_done)
             contest_id,
             ev.error
           ),
-          { level = vim.log.levels.WARN }
+          vim.log.levels.WARN
         )
         return
       end
@@ -327,7 +205,6 @@ function M.scrape_all_tests(platform, contest_id, callback, on_done)
             memory_mb = ev.memory_mb or 0,
             interactive = ev.interactive or false,
             multi_test = ev.multi_test or false,
-            precision = ev.precision ~= vim.NIL and ev.precision or nil,
             problem_id = ev.problem_id,
           })
         end
@@ -336,91 +213,4 @@ function M.scrape_all_tests(platform, contest_id, callback, on_done)
   })
 end
 
----@param platform string
----@param credentials table
----@param on_status fun(ev: table)?
----@param callback fun(result: table)?
-function M.login(platform, credentials, on_status, callback)
-  local done = false
-  run_scraper(platform, 'login', {}, {
-    ndjson = true,
-    stdin = vim.json.encode(credentials),
-    on_event = function(ev)
-      if ev.credentials ~= nil and next(ev.credentials) ~= nil then
-        vim.schedule(function()
-          require('cp.git_credential').store(platform, ev.credentials)
-        end)
-      end
-      if ev.status ~= nil then
-        if type(on_status) == 'function' then
-          on_status(ev)
-        end
-      elseif ev.success ~= nil then
-        done = true
-        if type(callback) == 'function' then
-          callback(ev)
-        end
-      end
-    end,
-    on_exit = function(proc)
-      if not done and type(callback) == 'function' then
-        callback({
-          success = false,
-          error = 'login process exited (code=' .. tostring(proc.code) .. ')',
-        })
-      end
-    end,
-  })
-end
-
----@param platform string
----@param contest_id string
----@param problem_id string
----@param language string
----@param source_file string
----@param credentials table
----@param on_status fun(ev: table)?
----@param callback fun(result: table)?
-function M.submit(
-  platform,
-  contest_id,
-  problem_id,
-  language,
-  source_file,
-  credentials,
-  on_status,
-  callback
-)
-  local done = false
-  run_scraper(platform, 'submit', { contest_id, problem_id, language, source_file }, {
-    ndjson = true,
-    stdin = vim.json.encode(credentials),
-    on_event = function(ev)
-      if ev.credentials ~= nil and next(ev.credentials) ~= nil then
-        vim.schedule(function()
-          require('cp.git_credential').store(platform, ev.credentials)
-        end)
-      end
-      if ev.status ~= nil then
-        if type(on_status) == 'function' then
-          on_status(ev)
-        end
-      elseif ev.success ~= nil then
-        done = true
-        if type(callback) == 'function' then
-          callback(ev)
-        end
-      end
-    end,
-    on_exit = function(proc)
-      if not done and type(callback) == 'function' then
-        callback({
-          success = false,
-          error = 'submit process exited (code=' .. tostring(proc.code) .. ')',
-        })
-      end
-    end,
-  })
-end
-
 return M

lua/cp/setup.lua

@@ -8,39 +8,6 @@ local logger = require('cp.log')
 local scraper = require('cp.scraper')
 local state = require('cp.state')
 
-local function apply_template(bufnr, lang_id, platform)
-  local config = config_module.get_config()
-  local eff = config.runtime.effective[platform] and config.runtime.effective[platform][lang_id]
-  if not eff or not eff.template then
-    return
-  end
-  local path = vim.fn.expand(eff.template)
-  if vim.fn.filereadable(path) ~= 1 then
-    logger.log(
-      ('[cp.nvim] template not readable: %s'):format(path),
-      { level = vim.log.levels.WARN }
-    )
-    return
-  end
-  local lines = vim.fn.readfile(path)
-  vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines)
-  local marker = config.templates and config.templates.cursor_marker
-  if marker then
-    for lnum, line in ipairs(lines) do
-      local col = line:find(marker, 1, true)
-      if col then
-        local new_line = line:sub(1, col - 1) .. line:sub(col + #marker)
-        vim.api.nvim_buf_set_lines(bufnr, lnum - 1, lnum, false, { new_line })
-        local winid = vim.fn.bufwinid(bufnr)
-        if winid ~= -1 then
-          vim.api.nvim_win_set_cursor(winid, { lnum, col - 1 })
-        end
-        break
-      end
-    end
-  end
-end
-
 ---Get the language of the current file from cache
 ---@return string?
 local function get_current_file_language()
@@ -115,15 +82,11 @@ local function start_tests(platform, contest_id, problems)
     return not vim.tbl_isempty(cache.get_test_cases(platform, contest_id, p.id))
   end, problems)
   if cached_len ~= #problems then
-    local to_fetch = #problems - cached_len
     logger.log(('Fetching %s/%s problem tests...'):format(cached_len, #problems))
     scraper.scrape_all_tests(platform, contest_id, function(ev)
       local cached_tests = {}
       if not ev.interactive and vim.tbl_isempty(ev.tests) then
-        logger.log(
-          ("No tests found for problem '%s'."):format(ev.problem_id),
-          { level = vim.log.levels.WARN }
-        )
+        logger.log(("No tests found for problem '%s'."):format(ev.problem_id), vim.log.levels.WARN)
       end
       for i, t in ipairs(ev.tests) do
         cached_tests[i] = { index = i, input = t.input, expected = t.expected }
@@ -137,8 +100,7 @@ local function start_tests(platform, contest_id, problems)
         ev.timeout_ms or 0,
         ev.memory_mb or 0,
         ev.interactive,
-        ev.multi_test,
-        ev.precision
+        ev.multi_test
       )
 
       local io_state = state.get_io_view_state()
@@ -149,11 +111,6 @@ local function start_tests(platform, contest_id, problems)
           require('cp.utils').update_buffer_content(io_state.input_buf, input_lines, nil, nil)
         end
       end
-    end, function()
-      logger.log(
-        ('Loaded %d test%s.'):format(to_fetch, to_fetch == 1 and '' or 's'),
-        { level = vim.log.levels.INFO, override = true }
-      )
     end)
   end
 end
@@ -171,39 +128,24 @@ function M.setup_contest(platform, contest_id, problem_id, language)
   if language then
     local lang_result = config_module.get_language_for_platform(platform, language)
     if not lang_result.valid then
-      logger.log(lang_result.error, { level = vim.log.levels.ERROR })
+      logger.log(lang_result.error, vim.log.levels.ERROR)
       return
     end
   end
 
-  local is_new_contest = old_platform ~= platform or old_contest_id ~= contest_id
-
-  if is_new_contest then
-    local views = require('cp.ui.views')
-    views.cancel_io_view()
-    local active = state.get_active_panel()
-    if active == 'interactive' then
-      views.cancel_interactive()
-    elseif active == 'stress' then
-      require('cp.stress').cancel()
-    elseif active == 'run' then
-      views.disable()
-    end
-  end
+  local is_new_contest = old_platform ~= platform and old_contest_id ~= contest_id
 
   cache.load()
 
   local function proceed(contest_data)
-    if is_new_contest then
-      local io_state = state.get_io_view_state()
-      if io_state and io_state.output_buf and vim.api.nvim_buf_is_valid(io_state.output_buf) then
-        require('cp.utils').update_buffer_content(io_state.output_buf, {}, nil, nil)
-      end
-    end
     local problems = contest_data.problems
     local pid = problem_id and problem_id or problems[1].id
     M.setup_problem(pid, language)
     start_tests(platform, contest_id, problems)
+
+    if config_module.get_config().open_url and is_new_contest and contest_data.url then
+      vim.ui.open(contest_data.url:format(pid))
+    end
   end
 
   local contest_data = cache.get_contest_data(platform, contest_id)
@@ -218,7 +160,12 @@ function M.setup_contest(platform, contest_id, problem_id, language)
     vim.bo[bufnr].buftype = ''
     vim.bo[bufnr].swapfile = false
 
-    state.set_language(lang)
+    if cfg.hooks and cfg.hooks.setup_code and not vim.b[bufnr].cp_setup_done then
+      local ok = pcall(cfg.hooks.setup_code, state)
+      if ok then
+        vim.b[bufnr].cp_setup_done = true
+      end
+    end
 
     state.set_provisional({
       bufnr = bufnr,
@@ -226,23 +173,16 @@ function M.setup_contest(platform, contest_id, problem_id, language)
       contest_id = contest_id,
       language = lang,
       requested_problem_id = problem_id,
-      token = vim.uv.hrtime(),
+      token = vim.loop.hrtime(),
     })
 
-    logger.log('Fetching contests problems...', { level = vim.log.levels.INFO, override = true })
+    logger.log('Fetching contests problems...', vim.log.levels.INFO, true)
     scraper.scrape_contest_metadata(
       platform,
       contest_id,
       vim.schedule_wrap(function(result)
         local problems = result.problems or {}
-        cache.set_contest_data(
-          platform,
-          contest_id,
-          problems,
-          result.url,
-          result.contest_url or '',
-          result.standings_url or ''
-        )
+        cache.set_contest_data(platform, contest_id, problems, result.url)
         local prov = state.get_provisional()
         if not prov or prov.platform ~= platform or prov.contest_id ~= contest_id then
           return
@@ -272,7 +212,7 @@ end
 function M.setup_problem(problem_id, language)
   local platform = state.get_platform()
   if not platform then
-    logger.log('No platform/contest/problem configured.', { level = vim.log.levels.ERROR })
+    logger.log('No platform/contest/problem configured.', vim.log.levels.ERROR)
     return
   end
 
@@ -293,7 +233,7 @@ function M.setup_problem(problem_id, language)
   if language then
     local lang_result = config_module.get_language_for_platform(platform, language)
     if not lang_result.valid then
-      logger.log(lang_result.error, { level = vim.log.levels.ERROR })
+      logger.log(lang_result.error, vim.log.levels.ERROR)
       return
     end
   end
@@ -305,96 +245,7 @@ function M.setup_problem(problem_id, language)
     return
   end
 
-  if vim.fn.filereadable(source_file) == 1 then
-    local existing = cache.get_file_state(vim.fn.fnamemodify(source_file, ':p'))
-    if
-      existing
-      and (
-        existing.platform ~= platform
-        or existing.contest_id ~= (state.get_contest_id() or '')
-        or existing.problem_id ~= problem_id
-      )
-    then
-      logger.log(
-        ('File %q already exists for %s/%s %s.'):format(
-          source_file,
-          existing.platform,
-          existing.contest_id,
-          existing.problem_id
-        ),
-        { level = vim.log.levels.ERROR }
-      )
-      return
-    end
-  end
-
-  local _abs_sf = vim.fn.fnamemodify(source_file, ':p')
-  if vim.uv.fs_stat(_abs_sf) and vim.fn.bufnr(_abs_sf) == -1 then
-    local ans = vim.fn.input(
-      ('File %q already exists. Overwrite? [y/N]: '):format(vim.fn.fnamemodify(source_file, ':~:.'))
-    )
-    vim.cmd.redraw()
-    if ans:lower() ~= 'y' then
-      local prov0 = state.get_provisional()
-      if
-        prov0
-        and prov0.platform == platform
-        and prov0.contest_id == (state.get_contest_id() or '')
-      then
-        if vim.api.nvim_buf_is_valid(prov0.bufnr) then
-          vim.api.nvim_buf_delete(prov0.bufnr, { force = true })
-        end
-        state.set_provisional(nil)
-      end
-      vim.cmd.only({ mods = { silent = true } })
-      if vim.fn.expand('%:p') ~= vim.fn.fnamemodify(source_file, ':p') then
-        vim.cmd.e(source_file)
-      end
-      local declined_bufnr = vim.api.nvim_get_current_buf()
-      state.set_solution_win(vim.api.nvim_get_current_win())
-      require('cp.ui.views').ensure_io_view()
-      if not vim.b[declined_bufnr].cp_setup_done then
-        local s = config.hooks and config.hooks.setup
-        if s and s.code then
-          local ok = pcall(s.code, state)
-          if ok then
-            vim.b[declined_bufnr].cp_setup_done = true
-          end
-        else
-          helpers.clearcol(declined_bufnr)
-          vim.b[declined_bufnr].cp_setup_done = true
-        end
-        local o = config.hooks and config.hooks.on
-        if o and o.enter then
-          vim.api.nvim_create_autocmd('BufEnter', {
-            buffer = declined_bufnr,
-            callback = function()
-              pcall(o.enter, state)
-            end,
-          })
-          pcall(o.enter, state)
-        end
-      end
-      cache.set_file_state(
-        vim.fn.expand('%:p'),
-        platform,
-        state.get_contest_id() or '',
-        state.get_problem_id() or '',
-        lang
-      )
-      return
-    end
-  end
-
-  local contest_dir = vim.fn.fnamemodify(source_file, ':h')
-  local is_new_dir = vim.fn.isdirectory(contest_dir) == 0
-  vim.fn.mkdir(contest_dir, 'p')
-  if is_new_dir then
-    local s = config.hooks and config.hooks.setup
-    if s and s.contest then
-      pcall(s.contest, state)
-    end
-  end
+  vim.fn.mkdir(vim.fn.fnamemodify(source_file, ':h'), 'p')
 
   local prov = state.get_provisional()
   if prov and prov.platform == platform and prov.contest_id == (state.get_contest_id() or '') then
@@ -405,6 +256,7 @@ function M.setup_problem(problem_id, language)
         state.set_provisional(nil)
       else
         vim.api.nvim_buf_set_name(prov.bufnr, source_file)
+        vim.bo[prov.bufnr].swapfile = true
         -- selene: allow(mixed_table)
         vim.cmd.write({
           vim.fn.fnameescape(source_file),
@@ -412,29 +264,14 @@ function M.setup_problem(problem_id, language)
           mods = { silent = true, noautocmd = true, keepalt = true },
         })
         state.set_solution_win(vim.api.nvim_get_current_win())
-        if not vim.b[prov.bufnr].cp_setup_done then
-          apply_template(prov.bufnr, lang, platform)
-          local s = config.hooks and config.hooks.setup
-          if s and s.code then
-            local ok = pcall(s.code, state)
-            if ok then
-              vim.b[prov.bufnr].cp_setup_done = true
-            end
-          else
-            helpers.clearcol(prov.bufnr)
+        if config.hooks and config.hooks.setup_code and not vim.b[prov.bufnr].cp_setup_done then
+          local ok = pcall(config.hooks.setup_code, state)
+          if ok then
             vim.b[prov.bufnr].cp_setup_done = true
           end
-          local o = config.hooks and config.hooks.on
-          if o and o.enter then
-            local bufnr = prov.bufnr
-            vim.api.nvim_create_autocmd('BufEnter', {
-              buffer = bufnr,
-              callback = function()
-                pcall(o.enter, state)
-              end,
-            })
-            pcall(o.enter, state)
-          end
+        elseif not vim.b[prov.bufnr].cp_setup_done then
+          helpers.clearcol(prov.bufnr)
+          vim.b[prov.bufnr].cp_setup_done = true
         end
         cache.set_file_state(
           vim.fn.fnamemodify(source_file, ':p'),
@@ -453,39 +290,18 @@ function M.setup_problem(problem_id, language)
   end
 
   vim.cmd.only({ mods = { silent = true } })
-  local current_file = vim.fn.expand('%:p')
-  if current_file ~= vim.fn.fnamemodify(source_file, ':p') then
-    vim.cmd.e(source_file)
-  end
+  vim.cmd.e(source_file)
   local bufnr = vim.api.nvim_get_current_buf()
   state.set_solution_win(vim.api.nvim_get_current_win())
   require('cp.ui.views').ensure_io_view()
-  if not vim.b[bufnr].cp_setup_done then
-    local is_new = vim.api.nvim_buf_line_count(bufnr) == 1
-      and vim.api.nvim_buf_get_lines(bufnr, 0, 1, false)[1] == ''
-    if is_new then
-      apply_template(bufnr, lang, platform)
-    end
-    local s = config.hooks and config.hooks.setup
-    if s and s.code then
-      local ok = pcall(s.code, state)
-      if ok then
-        vim.b[bufnr].cp_setup_done = true
-      end
-    else
-      helpers.clearcol(bufnr)
+  if config.hooks and config.hooks.setup_code and not vim.b[bufnr].cp_setup_done then
+    local ok = pcall(config.hooks.setup_code, state)
+    if ok then
       vim.b[bufnr].cp_setup_done = true
     end
-    local o = config.hooks and config.hooks.on
-    if o and o.enter then
-      vim.api.nvim_create_autocmd('BufEnter', {
-        buffer = bufnr,
-        callback = function()
-          pcall(o.enter, state)
-        end,
-      })
-      pcall(o.enter, state)
-    end
+  elseif not vim.b[bufnr].cp_setup_done then
+    helpers.clearcol(bufnr)
+    vim.b[bufnr].cp_setup_done = true
   end
   cache.set_file_state(
     vim.fn.expand('%:p'),
@@ -508,7 +324,7 @@ function M.navigate_problem(direction, language)
   local contest_id = state.get_contest_id()
   local current_problem_id = state.get_problem_id()
   if not platform or not contest_id or not current_problem_id then
-    logger.log('No platform configured.', { level = vim.log.levels.ERROR })
+    logger.log('No platform configured.', vim.log.levels.ERROR)
     return
   end
 
@@ -520,7 +336,7 @@ function M.navigate_problem(direction, language)
         constants.PLATFORM_DISPLAY_NAMES[platform],
         contest_id
       ),
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
     return
   end
@@ -534,15 +350,9 @@ function M.navigate_problem(direction, language)
 
   logger.log(('navigate_problem: %s -> %s'):format(current_problem_id, problems[new_index].id))
 
-  local views = require('cp.ui.views')
-  views.cancel_io_view()
   local active_panel = state.get_active_panel()
   if active_panel == 'run' then
-    views.disable()
-  elseif active_panel == 'interactive' then
-    views.cancel_interactive()
-  elseif active_panel == 'stress' then
-    require('cp.stress').cancel()
+    require('cp.ui.views').disable()
   end
 
   local lang = nil
@@ -550,7 +360,7 @@ function M.navigate_problem(direction, language)
   if language then
     local lang_result = config_module.get_language_for_platform(platform, language)
     if not lang_result.valid then
-      logger.log(lang_result.error, { level = vim.log.levels.ERROR })
+      logger.log(lang_result.error, vim.log.levels.ERROR)
       return
     end
     lang = language

lua/cp/state.lua

@@ -9,6 +9,7 @@
 ---@class cp.IoViewState
 ---@field output_buf integer
 ---@field input_buf integer
+---@field current_test_index integer?
 ---@field source_buf integer?
 
 ---@class cp.State

lua/cp/stress.lua

@@ -1,259 +0,0 @@
-local M = {}
-
-local logger = require('cp.log')
-local state = require('cp.state')
-local utils = require('cp.utils')
-
-local GENERATOR_PATTERNS = {
-  'gen.py',
-  'gen.cc',
-  'gen.cpp',
-  'generator.py',
-  'generator.cc',
-  'generator.cpp',
-}
-
-local BRUTE_PATTERNS = {
-  'brute.py',
-  'brute.cc',
-  'brute.cpp',
-  'slow.py',
-  'slow.cc',
-  'slow.cpp',
-}
-
-local function find_file(patterns)
-  for _, pattern in ipairs(patterns) do
-    if vim.fn.filereadable(pattern) == 1 then
-      return pattern
-    end
-  end
-  return nil
-end
-
-local function compile_cpp(source, output)
-  local result = vim.system({ 'sh', '-c', 'g++ -O2 -o ' .. output .. ' ' .. source }):wait()
-  if result.code ~= 0 then
-    logger.log(
-      ('Failed to compile %s: %s'):format(source, result.stderr or ''),
-      { level = vim.log.levels.ERROR }
-    )
-    return false
-  end
-  return true
-end
-
-local function build_run_cmd(file)
-  local ext = file:match('%.([^%.]+)$')
-  if ext == 'cc' or ext == 'cpp' then
-    local base = file:gsub('%.[^%.]+$', '')
-    local bin = base .. '_bin'
-    if not compile_cpp(file, bin) then
-      return nil
-    end
-    return './' .. bin
-  elseif ext == 'py' then
-    return 'python ' .. file
-  end
-  return './' .. file
-end
-
----@param generator_cmd? string
----@param brute_cmd? string
-function M.toggle(generator_cmd, brute_cmd)
-  if state.get_active_panel() == 'stress' then
-    if state.stress_buf and vim.api.nvim_buf_is_valid(state.stress_buf) then
-      local job = vim.b[state.stress_buf].terminal_job_id
-      if job then
-        vim.fn.jobstop(job)
-      end
-    end
-    if state.saved_stress_session then
-      vim.cmd.source(state.saved_stress_session)
-      vim.fn.delete(state.saved_stress_session)
-      state.saved_stress_session = nil
-    end
-    state.set_active_panel(nil)
-    require('cp.ui.views').ensure_io_view()
-    return
-  end
-
-  if state.get_active_panel() then
-    logger.log('Another panel is already active.', { level = vim.log.levels.WARN })
-    return
-  end
-
-  local gen_file = generator_cmd
-  local brute_file = brute_cmd
-
-  if not gen_file then
-    gen_file = find_file(GENERATOR_PATTERNS)
-  end
-  if not brute_file then
-    brute_file = find_file(BRUTE_PATTERNS)
-  end
-
-  if not gen_file then
-    logger.log(
-      'No generator found. Pass generator as first arg or add gen.{py,cc,cpp}.',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-  if not brute_file then
-    logger.log(
-      'No brute solution found. Pass brute as second arg or add brute.{py,cc,cpp}.',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  local gen_cmd = build_run_cmd(gen_file)
-  if not gen_cmd then
-    return
-  end
-
-  local brute_run_cmd = build_run_cmd(brute_file)
-  if not brute_run_cmd then
-    return
-  end
-
-  state.saved_stress_session = vim.fn.tempname()
-  -- selene: allow(mixed_table)
-  vim.cmd.mksession({ state.saved_stress_session, bang = true })
-  vim.cmd.only({ mods = { silent = true } })
-
-  local execute = require('cp.runner.execute')
-
-  local function restore_session()
-    if state.saved_stress_session then
-      vim.cmd.source(state.saved_stress_session)
-      vim.fn.delete(state.saved_stress_session)
-      state.saved_stress_session = nil
-    end
-    require('cp.ui.views').ensure_io_view()
-  end
-
-  execute.compile_problem(false, function(compile_result)
-    if not compile_result.success then
-      local run = require('cp.runner.run')
-      run.handle_compilation_failure(compile_result.output)
-      restore_session()
-      return
-    end
-
-    local binary = state.get_binary_file()
-    if not binary or binary == '' then
-      logger.log('No binary produced.', { level = vim.log.levels.ERROR })
-      restore_session()
-      return
-    end
-
-    local script = vim.fn.fnamemodify(utils.get_plugin_path() .. '/scripts/stress.py', ':p')
-
-    local cmdline
-    if utils.is_nix_build() then
-      cmdline = table.concat({
-        vim.fn.shellescape(utils.get_nix_python()),
-        vim.fn.shellescape(script),
-        vim.fn.shellescape(gen_cmd),
-        vim.fn.shellescape(brute_run_cmd),
-        vim.fn.shellescape(binary),
-      }, ' ')
-    else
-      cmdline = table.concat({
-        'uv',
-        'run',
-        vim.fn.shellescape(script),
-        vim.fn.shellescape(gen_cmd),
-        vim.fn.shellescape(brute_run_cmd),
-        vim.fn.shellescape(binary),
-      }, ' ')
-    end
-
-    vim.cmd.terminal(cmdline)
-    local term_buf = vim.api.nvim_get_current_buf()
-    pcall(
-      vim.api.nvim_buf_set_name,
-      term_buf,
-      ("term://stress.py '%s' '%s' '%s'"):format(gen_cmd, brute_run_cmd, binary)
-    )
-    local term_win = vim.api.nvim_get_current_win()
-
-    local cleaned = false
-    local function cleanup()
-      if cleaned then
-        return
-      end
-      cleaned = true
-      if term_buf and vim.api.nvim_buf_is_valid(term_buf) then
-        local job = vim.b[term_buf] and vim.b[term_buf].terminal_job_id or nil
-        if job then
-          pcall(vim.fn.jobstop, job)
-        end
-      end
-      restore_session()
-      state.stress_buf = nil
-      state.stress_win = nil
-      state.set_active_panel(nil)
-    end
-
-    vim.api.nvim_create_autocmd({ 'BufWipeout', 'BufUnload' }, {
-      buffer = term_buf,
-      callback = cleanup,
-    })
-
-    vim.api.nvim_create_autocmd('WinClosed', {
-      callback = function()
-        if cleaned then
-          return
-        end
-        local any = false
-        for _, win in ipairs(vim.api.nvim_list_wins()) do
-          if vim.api.nvim_win_is_valid(win) and vim.api.nvim_win_get_buf(win) == term_buf then
-            any = true
-            break
-          end
-        end
-        if not any then
-          cleanup()
-        end
-      end,
-    })
-
-    vim.api.nvim_create_autocmd('TermClose', {
-      buffer = term_buf,
-      callback = function()
-        vim.b[term_buf].cp_stress_exited = true
-      end,
-    })
-
-    vim.keymap.set('t', '<c-q>', function()
-      cleanup()
-    end, { buffer = term_buf, silent = true })
-    vim.keymap.set('n', '<c-q>', function()
-      cleanup()
-    end, { buffer = term_buf, silent = true })
-
-    state.stress_buf = term_buf
-    state.stress_win = term_win
-    state.set_active_panel('stress')
-  end)
-end
-
----@return nil
-function M.cancel()
-  if state.stress_buf and vim.api.nvim_buf_is_valid(state.stress_buf) then
-    local job = vim.b[state.stress_buf].terminal_job_id
-    if job then
-      vim.fn.jobstop(job)
-    end
-  end
-  if state.saved_stress_session then
-    vim.fn.delete(state.saved_stress_session)
-    state.saved_stress_session = nil
-  end
-  state.set_active_panel(nil)
-end
-
-return M

lua/cp/submit.lua

@@ -1,146 +0,0 @@
-local M = {}
-
-local config = require('cp.config')
-local constants = require('cp.constants')
-local git_credential = require('cp.git_credential')
-local logger = require('cp.log')
-local state = require('cp.state')
-
-local STATUS_MSGS = {
-  installing_browser = 'Installing browser (first time setup)...',
-  checking_login = 'Checking login...',
-  logging_in = 'Logging in...',
-  submitting = 'Submitting...',
-}
-
-local function prompt_credentials(platform, callback)
-  local saved = git_credential.get(platform)
-  if saved and saved.username and saved.password then
-    callback(saved)
-    return
-  end
-  local display = constants.PLATFORM_DISPLAY_NAMES[platform] or platform
-  vim.ui.input(
-    { prompt = '[cp.nvim]: ' .. display .. ' username (<Esc> to cancel): ' },
-    function(username)
-      if not username or username == '' then
-        logger.log('Submit cancelled', { level = vim.log.levels.WARN })
-        return
-      end
-      vim.fn.inputsave()
-      local password = vim.fn.inputsecret('[cp.nvim]: ' .. display .. ' password: ')
-      vim.fn.inputrestore()
-      vim.cmd.redraw()
-      if not password or password == '' then
-        logger.log('Submit cancelled', { level = vim.log.levels.WARN })
-        return
-      end
-      callback({ username = username, password = password })
-    end
-  )
-end
-
----@param opts { language?: string }?
-function M.submit(opts)
-  if not git_credential.has_helper() then
-    logger.log(
-      'No git credential helper configured. See :help cp-credentials',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  local platform = state.get_platform()
-  local contest_id = state.get_contest_id()
-  local problem_id = state.get_problem_id()
-  local language = (opts and opts.language) or state.get_language()
-  if not platform or not contest_id or not problem_id or not language then
-    logger.log(
-      'No active problem. Use :CP <platform> <contest> first.',
-      { level = vim.log.levels.ERROR }
-    )
-    return
-  end
-
-  local source_file = state.get_source_file()
-  if not source_file then
-    logger.log('Source file not found', { level = vim.log.levels.ERROR })
-    return
-  end
-  source_file = vim.fn.fnamemodify(source_file, ':p')
-  local _stat = vim.uv.fs_stat(source_file)
-  if not _stat then
-    logger.log('Source file not found', { level = vim.log.levels.ERROR })
-    return
-  end
-  if _stat.size == 0 then
-    logger.log('Submit aborted: source file has no content', { level = vim.log.levels.WARN })
-    return
-  end
-
-  local submit_language = language
-  local cfg = config.get_config()
-  local plat_effective = cfg.runtime and cfg.runtime.effective and cfg.runtime.effective[platform]
-  local eff = plat_effective and plat_effective[language]
-  if eff then
-    if eff.submit_id then
-      submit_language = eff.submit_id or submit_language
-    else
-      local ver = eff.version or constants.DEFAULT_VERSIONS[language]
-      if ver then
-        local versions = (constants.LANGUAGE_VERSIONS[platform] or {})[language]
-        if versions and versions[ver] then
-          submit_language = versions[ver] or submit_language
-        end
-      end
-    end
-  end
-
-  local function do_submit(creds)
-    vim.cmd.update()
-
-    require('cp.scraper').submit(
-      platform,
-      contest_id,
-      problem_id,
-      submit_language,
-      source_file,
-      creds,
-      function(ev)
-        vim.schedule(function()
-          logger.log(
-            STATUS_MSGS[ev.status] or ev.status,
-            { level = vim.log.levels.INFO, override = true }
-          )
-        end)
-      end,
-      function(result)
-        vim.schedule(function()
-          if result and result.success then
-            git_credential.store(platform, creds)
-            logger.log('Submitted successfully', { level = vim.log.levels.INFO, override = true })
-          else
-            local err = result and result.error or 'unknown error'
-            if err == 'bad_credentials' or err:match('^Login failed') then
-              git_credential.reject(platform, creds)
-              logger.log(
-                'Submit failed: ' .. (constants.LOGIN_ERRORS[err] or err),
-                { level = vim.log.levels.ERROR }
-              )
-              prompt_credentials(platform, do_submit)
-            else
-              logger.log(
-                'Submit failed: ' .. (constants.LOGIN_ERRORS[err] or err),
-                { level = vim.log.levels.ERROR }
-              )
-            end
-          end
-        end)
-      end
-    )
-  end
-
-  prompt_credentials(platform, do_submit)
-end
-
-return M

lua/cp/ui/edit.lua

@@ -90,7 +90,7 @@ local function delete_current_test()
     return
   end
   if #edit_state.test_buffers == 1 then
-    logger.log('Problems must have at least one test case.', { level = vim.log.levels.ERROR })
+    logger.log('Problems must have at least one test case.', vim.log.levels.ERROR)
     return
   end
 
@@ -144,7 +144,7 @@ local function add_new_test()
   vim.api.nvim_win_set_buf(input_win, input_buf)
   vim.bo[input_buf].modifiable = true
   vim.bo[input_buf].readonly = false
-  vim.bo[input_buf].buftype = 'acwrite'
+  vim.bo[input_buf].buftype = 'nofile'
   vim.bo[input_buf].buflisted = false
   helpers.clearcol(input_buf)
 
@@ -155,7 +155,7 @@ local function add_new_test()
   vim.api.nvim_win_set_buf(expected_win, expected_buf)
   vim.bo[expected_buf].modifiable = true
   vim.bo[expected_buf].readonly = false
-  vim.bo[expected_buf].buftype = 'acwrite'
+  vim.bo[expected_buf].buftype = 'nofile'
   vim.bo[expected_buf].buflisted = false
   helpers.clearcol(expected_buf)
 
@@ -177,80 +177,6 @@ local function add_new_test()
   logger.log(('Added test %d'):format(new_index))
 end
 
-local function save_all_tests()
-  if not edit_state then
-    return
-  end
-
-  local platform = state.get_platform()
-  local contest_id = state.get_contest_id()
-  local problem_id = state.get_problem_id()
-
-  if not platform or not contest_id or not problem_id then
-    return
-  end
-
-  for i, pair in ipairs(edit_state.test_buffers) do
-    if
-      vim.api.nvim_buf_is_valid(pair.input_buf) and vim.api.nvim_buf_is_valid(pair.expected_buf)
-    then
-      local input_lines = vim.api.nvim_buf_get_lines(pair.input_buf, 0, -1, false)
-      local expected_lines = vim.api.nvim_buf_get_lines(pair.expected_buf, 0, -1, false)
-
-      edit_state.test_cases[i].input = table.concat(input_lines, '\n')
-      edit_state.test_cases[i].expected = table.concat(expected_lines, '\n')
-    end
-  end
-
-  local contest_data = cache.get_contest_data(platform, contest_id)
-  local is_multi_test = contest_data.problems[contest_data.index_map[problem_id]].multi_test
-    or false
-
-  local combined_input = table.concat(
-    vim.tbl_map(function(tc)
-      return tc.input
-    end, edit_state.test_cases),
-    '\n'
-  )
-  local combined_expected = table.concat(
-    vim.tbl_map(function(tc)
-      return tc.expected
-    end, edit_state.test_cases),
-    '\n'
-  )
-
-  cache.set_test_cases(
-    platform,
-    contest_id,
-    problem_id,
-    { input = combined_input, expected = combined_expected },
-    edit_state.test_cases,
-    edit_state.constraints and edit_state.constraints.timeout_ms or 0,
-    edit_state.constraints and edit_state.constraints.memory_mb or 0,
-    false,
-    is_multi_test
-  )
-
-  local config = config_module.get_config()
-  local base_name = config.filename and config.filename(platform, contest_id, problem_id, config)
-    or config_module.default_filename(contest_id, problem_id)
-
-  vim.fn.mkdir('io', 'p')
-
-  for i, tc in ipairs(edit_state.test_cases) do
-    local input_file = string.format('io/%s.%d.cpin', base_name, i)
-    local expected_file = string.format('io/%s.%d.cpout', base_name, i)
-
-    local input_content = (tc.input or ''):gsub('\r', '')
-    local expected_content = (tc.expected or ''):gsub('\r', '')
-
-    vim.fn.writefile(vim.split(input_content, '\n', { trimempty = true }), input_file)
-    vim.fn.writefile(vim.split(expected_content, '\n', { trimempty = true }), expected_file)
-  end
-
-  logger.log('Saved all test cases')
-end
-
 ---@param buf integer
 setup_keybindings = function(buf)
   local config = config_module.get_config()
@@ -311,40 +237,92 @@ setup_keybindings = function(buf)
         end
 
         if is_tracked then
-          logger.log(
-            'Test buffer closed unexpectedly. Exiting editor.',
-            { level = vim.log.levels.WARN }
-          )
+          logger.log('Test buffer closed unexpectedly. Exiting editor.', vim.log.levels.WARN)
           M.toggle_edit()
         end
       end)
     end,
   })
-
-  vim.api.nvim_create_autocmd('BufWriteCmd', {
-    group = augroup,
-    buffer = buf,
-    callback = function()
-      save_all_tests()
-      vim.bo[buf].modified = false
-    end,
-  })
 end
 
----@param test_index? integer
+local function save_all_tests()
+  if not edit_state then
+    return
+  end
+
+  local platform = state.get_platform()
+  local contest_id = state.get_contest_id()
+  local problem_id = state.get_problem_id()
+
+  if not platform or not contest_id or not problem_id then
+    return
+  end
+
+  for i, pair in ipairs(edit_state.test_buffers) do
+    if
+      vim.api.nvim_buf_is_valid(pair.input_buf) and vim.api.nvim_buf_is_valid(pair.expected_buf)
+    then
+      local input_lines = vim.api.nvim_buf_get_lines(pair.input_buf, 0, -1, false)
+      local expected_lines = vim.api.nvim_buf_get_lines(pair.expected_buf, 0, -1, false)
+
+      edit_state.test_cases[i].input = table.concat(input_lines, '\n')
+      edit_state.test_cases[i].expected = table.concat(expected_lines, '\n')
+    end
+  end
+
+  local contest_data = cache.get_contest_data(platform, contest_id)
+  local is_multi_test = contest_data.problems[contest_data.index_map[problem_id]].multi_test
+    or false
+
+  -- Generate combined test from individual test cases
+  local combined_input = table.concat(
+    vim.tbl_map(function(tc)
+      return tc.input
+    end, edit_state.test_cases),
+    '\n'
+  )
+  local combined_expected = table.concat(
+    vim.tbl_map(function(tc)
+      return tc.expected
+    end, edit_state.test_cases),
+    '\n'
+  )
+
+  cache.set_test_cases(
+    platform,
+    contest_id,
+    problem_id,
+    { input = combined_input, expected = combined_expected },
+    edit_state.test_cases,
+    edit_state.constraints and edit_state.constraints.timeout_ms or 0,
+    edit_state.constraints and edit_state.constraints.memory_mb or 0,
+    false,
+    is_multi_test
+  )
+
+  local config = config_module.get_config()
+  local base_name = config.filename and config.filename(platform, contest_id, problem_id, config)
+    or config_module.default_filename(contest_id, problem_id)
+
+  vim.fn.mkdir('io', 'p')
+
+  for i, tc in ipairs(edit_state.test_cases) do
+    local input_file = string.format('io/%s.%d.cpin', base_name, i)
+    local expected_file = string.format('io/%s.%d.cpout', base_name, i)
+
+    local input_content = (tc.input or ''):gsub('\r', '')
+    local expected_content = (tc.expected or ''):gsub('\r', '')
+
+    vim.fn.writefile(vim.split(input_content, '\n', { trimempty = true }), input_file)
+    vim.fn.writefile(vim.split(expected_content, '\n', { trimempty = true }), expected_file)
+  end
+
+  logger.log('Saved all test cases')
+end
+
 function M.toggle_edit(test_index)
   if edit_state then
     save_all_tests()
-
-    for _, pair in ipairs(edit_state.test_buffers) do
-      if vim.api.nvim_buf_is_valid(pair.input_buf) then
-        vim.api.nvim_buf_delete(pair.input_buf, { force = true })
-      end
-      if vim.api.nvim_buf_is_valid(pair.expected_buf) then
-        vim.api.nvim_buf_delete(pair.expected_buf, { force = true })
-      end
-    end
-
     edit_state = nil
 
     pcall(vim.api.nvim_clear_autocmds, { group = 'cp_edit_guard' })
@@ -372,10 +350,7 @@ function M.toggle_edit(test_index)
     state.get_platform(), state.get_contest_id(), state.get_problem_id()
 
   if not platform or not contest_id or not problem_id then
-    logger.log(
-      'No problem context. Run :CP <platform> <contest> first.',
-      { level = vim.log.levels.ERROR }
-    )
+    logger.log('No problem context. Run :CP <platform> <contest> first.', vim.log.levels.ERROR)
     return
   end
 
@@ -383,7 +358,7 @@ function M.toggle_edit(test_index)
   local test_cases = cache.get_test_cases(platform, contest_id, problem_id)
 
   if not test_cases or #test_cases == 0 then
-    logger.log('No test cases available for editing.', { level = vim.log.levels.ERROR })
+    logger.log('No test cases available for editing.', vim.log.levels.ERROR)
     return
   end
 
@@ -396,7 +371,7 @@ function M.toggle_edit(test_index)
   if target_index < 1 or target_index > #test_cases then
     logger.log(
       ('Test %d does not exist (only %d tests available)'):format(target_index, #test_cases),
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
     return
   end
@@ -436,7 +411,7 @@ function M.toggle_edit(test_index)
     vim.api.nvim_win_set_buf(input_win, input_buf)
     vim.bo[input_buf].modifiable = true
     vim.bo[input_buf].readonly = false
-    vim.bo[input_buf].buftype = 'acwrite'
+    vim.bo[input_buf].buftype = 'nofile'
     vim.bo[input_buf].buflisted = false
     helpers.clearcol(input_buf)
 
@@ -446,7 +421,7 @@ function M.toggle_edit(test_index)
     vim.api.nvim_win_set_buf(expected_win, expected_buf)
     vim.bo[expected_buf].modifiable = true
     vim.bo[expected_buf].readonly = false
-    vim.bo[expected_buf].buftype = 'acwrite'
+    vim.bo[expected_buf].buftype = 'nofile'
     vim.bo[expected_buf].buflisted = false
     helpers.clearcol(expected_buf)
 

lua/cp/ui/layouts.lua

@@ -1,9 +1,3 @@
----@class DiffLayout
----@field buffers integer[]
----@field windows integer[]
----@field mode string
----@field cleanup fun()
-
 local M = {}
 
 local helpers = require('cp.helpers')
@@ -177,11 +171,6 @@ local function create_single_layout(parent_win, content)
   }
 end
 
----@param mode string
----@param parent_win integer
----@param expected_content string
----@param actual_content string
----@return DiffLayout
 function M.create_diff_layout(mode, parent_win, expected_content, actual_content)
   if mode == 'single' then
     return create_single_layout(parent_win, actual_content)
@@ -196,13 +185,6 @@ function M.create_diff_layout(mode, parent_win, expected_content, actual_content
   end
 end
 
----@param current_diff_layout DiffLayout?
----@param current_mode string?
----@param main_win integer
----@param run table
----@param config cp.Config
----@param setup_keybindings_for_buffer fun(buf: integer)
----@return DiffLayout?, string?
 function M.update_diff_panes(
   current_diff_layout,
   current_mode,

lua/cp/ui/views.lua

@@ -2,7 +2,6 @@ local M = {}
 
 ---@class PanelOpts
 ---@field debug? boolean
----@field test_index? integer
 
 local cache = require('cp.cache')
 local config_module = require('cp.config')
@@ -14,9 +13,8 @@ local utils = require('cp.utils')
 
 local current_diff_layout = nil
 local current_mode = nil
-local _run_gen = 0
+local io_view_running = false
 
----@return nil
 function M.disable()
   local active_panel = state.get_active_panel()
   if not active_panel then
@@ -28,8 +26,6 @@ function M.disable()
     M.toggle_panel()
   elseif active_panel == 'interactive' then
     M.toggle_interactive()
-  elseif active_panel == 'stress' then
-    require('cp.stress').toggle()
   else
     logger.log(('Unknown panel type: %s'):format(tostring(active_panel)))
   end
@@ -54,7 +50,7 @@ function M.toggle_interactive(interactor_cmd)
   end
 
   if state.get_active_panel() then
-    logger.log('Another panel is already active.', { level = vim.log.levels.WARN })
+    logger.log('Another panel is already active.', vim.log.levels.WARN)
     return
   end
 
@@ -63,7 +59,7 @@ function M.toggle_interactive(interactor_cmd)
   if not platform or not contest_id or not problem_id then
     logger.log(
       'No platform/contest/problem configured. Use :CP <platform> <contest> [...] first.',
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
     return
   end
@@ -71,14 +67,11 @@ function M.toggle_interactive(interactor_cmd)
   cache.load()
   local contest_data = cache.get_contest_data(platform, contest_id)
   if
-    contest_data
-    and contest_data.index_map
-    and not contest_data.problems[contest_data.index_map[problem_id]].interactive
+    not contest_data
+    or not contest_data.index_map
+    or not contest_data.problems[contest_data.index_map[problem_id]].interactive
   then
-    logger.log(
-      'This problem is not interactive. Use :CP {run,panel}.',
-      { level = vim.log.levels.ERROR }
-    )
+    logger.log('This problem is interactive. Use :CP interact.', vim.log.levels.ERROR)
     return
   end
 
@@ -107,7 +100,7 @@ function M.toggle_interactive(interactor_cmd)
 
     local binary = state.get_binary_file()
     if not binary or binary == '' then
-      logger.log('No binary produced.', { level = vim.log.levels.ERROR })
+      logger.log('No binary produced.', vim.log.levels.ERROR)
       restore_session()
       return
     end
@@ -121,29 +114,20 @@ function M.toggle_interactive(interactor_cmd)
       if vim.fn.executable(interactor) ~= 1 then
         logger.log(
           ("Interactor '%s' is not executable."):format(interactor_cmd),
-          { level = vim.log.levels.ERROR }
+          vim.log.levels.ERROR
         )
         restore_session()
         return
       end
       local orchestrator =
         vim.fn.fnamemodify(utils.get_plugin_path() .. '/scripts/interact.py', ':p')
-      if utils.is_nix_build() then
-        cmdline = table.concat({
-          vim.fn.shellescape(utils.get_nix_python()),
-          vim.fn.shellescape(orchestrator),
-          vim.fn.shellescape(interactor),
-          vim.fn.shellescape(binary),
-        }, ' ')
-      else
-        cmdline = table.concat({
-          'uv',
-          'run',
-          vim.fn.shellescape(orchestrator),
-          vim.fn.shellescape(interactor),
-          vim.fn.shellescape(binary),
-        }, ' ')
-      end
+      cmdline = table.concat({
+        'uv',
+        'run',
+        vim.fn.shellescape(orchestrator),
+        vim.fn.shellescape(interactor),
+        vim.fn.shellescape(binary),
+      }, ' ')
     else
       cmdline = vim.fn.shellescape(binary)
     end
@@ -245,6 +229,7 @@ local function get_or_create_io_buffers()
   state.set_io_view_state({
     output_buf = output_buf,
     input_buf = input_buf,
+    current_test_index = 1,
     source_buf = current_source_buf,
   })
 
@@ -309,6 +294,49 @@ local function get_or_create_io_buffers()
     end,
   })
 
+  local cfg = config_module.get_config()
+  local platform = state.get_platform()
+  local contest_id = state.get_contest_id()
+  local problem_id = state.get_problem_id()
+
+  local function navigate_test(delta)
+    local io_view_state = state.get_io_view_state()
+    if not io_view_state then
+      return
+    end
+    if not platform or not contest_id or not problem_id then
+      return
+    end
+    local test_cases = cache.get_test_cases(platform, contest_id, problem_id)
+    if not test_cases or #test_cases == 0 then
+      return
+    end
+    local new_index = (io_view_state.current_test_index or 1) + delta
+    if new_index < 1 or new_index > #test_cases then
+      return
+    end
+    io_view_state.current_test_index = new_index
+    M.run_io_view(new_index)
+  end
+
+  if cfg.ui.run.next_test_key then
+    vim.keymap.set('n', cfg.ui.run.next_test_key, function()
+      navigate_test(1)
+    end, { buffer = output_buf, silent = true, desc = 'Next test' })
+    vim.keymap.set('n', cfg.ui.run.next_test_key, function()
+      navigate_test(1)
+    end, { buffer = input_buf, silent = true, desc = 'Next test' })
+  end
+
+  if cfg.ui.run.prev_test_key then
+    vim.keymap.set('n', cfg.ui.run.prev_test_key, function()
+      navigate_test(-1)
+    end, { buffer = output_buf, silent = true, desc = 'Previous test' })
+    vim.keymap.set('n', cfg.ui.run.prev_test_key, function()
+      navigate_test(-1)
+    end, { buffer = input_buf, silent = true, desc = 'Previous test' })
+  end
+
   return output_buf, input_buf
 end
 
@@ -352,14 +380,13 @@ local function create_window_layout(output_buf, input_buf)
   vim.api.nvim_set_current_win(solution_win)
 end
 
----@return nil
 function M.ensure_io_view()
   local platform, contest_id, problem_id =
     state.get_platform(), state.get_contest_id(), state.get_problem_id()
   if not platform or not contest_id or not problem_id then
     logger.log(
       'No platform/contest/problem configured. Use :CP <platform> <contest> [...] first.',
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
     return
   end
@@ -388,10 +415,7 @@ function M.ensure_io_view()
     and contest_data.index_map
     and contest_data.problems[contest_data.index_map[problem_id]].interactive
   then
-    logger.log(
-      'This problem is not interactive. Use :CP {run,panel}.',
-      { level = vim.log.levels.ERROR }
-    )
+    logger.log('This problem is not interactive. Use :CP {run,panel}.', vim.log.levels.ERROR)
     return
   end
 
@@ -411,12 +435,12 @@ function M.ensure_io_view()
 
   local cfg = config_module.get_config()
 
-  local io = cfg.hooks and cfg.hooks.setup and cfg.hooks.setup.io
-  if io and io.output then
-    pcall(io.output, output_buf, state)
+  if cfg.hooks and cfg.hooks.setup_io_output then
+    pcall(cfg.hooks.setup_io_output, output_buf, state)
   end
-  if io and io.input then
-    pcall(io.input, input_buf, state)
+
+  if cfg.hooks and cfg.hooks.setup_io_input then
+    pcall(cfg.hooks.setup_io_input, input_buf, state)
   end
 
   local test_cases = cache.get_test_cases(platform, contest_id, problem_id)
@@ -600,17 +624,14 @@ local function render_io_view_results(io_state, test_indices, mode, combined_res
   utils.update_buffer_content(io_state.output_buf, output_lines, final_highlights, output_ns)
 end
 
----@param test_indices_arg integer[]?
----@param debug boolean?
----@param mode? string
 function M.run_io_view(test_indices_arg, debug, mode)
-  _run_gen = _run_gen + 1
-  local gen = _run_gen
+  if io_view_running then
+    logger.log('Tests already running', vim.log.levels.WARN)
+    return
+  end
+  io_view_running = true
 
-  logger.log(
-    ('%s tests...'):format(debug and 'Debugging' or 'Running'),
-    { level = vim.log.levels.INFO, override = true }
-  )
+  logger.log(('%s tests...'):format(debug and 'Debugging' or 'Running'), vim.log.levels.INFO, true)
 
   mode = mode or 'combined'
 
@@ -619,15 +640,17 @@ function M.run_io_view(test_indices_arg, debug, mode)
   if not platform or not contest_id or not problem_id then
     logger.log(
       'No platform/contest/problem configured. Use :CP <platform> <contest> [...] first.',
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
+    io_view_running = false
     return
   end
 
   cache.load()
   local contest_data = cache.get_contest_data(platform, contest_id)
   if not contest_data or not contest_data.index_map then
-    logger.log('No test cases available.', { level = vim.log.levels.ERROR })
+    logger.log('No test cases available.', vim.log.levels.ERROR)
+    io_view_running = false
     return
   end
 
@@ -643,12 +666,14 @@ function M.run_io_view(test_indices_arg, debug, mode)
   if mode == 'combined' then
     local combined = cache.get_combined_test(platform, contest_id, problem_id)
     if not combined then
-      logger.log('No combined test available', { level = vim.log.levels.ERROR })
+      logger.log('No combined test available', vim.log.levels.ERROR)
+      io_view_running = false
       return
     end
   else
     if not run.load_test_cases() then
-      logger.log('No test cases available', { level = vim.log.levels.ERROR })
+      logger.log('No test cases available', vim.log.levels.ERROR)
+      io_view_running = false
       return
     end
   end
@@ -667,8 +692,9 @@ function M.run_io_view(test_indices_arg, debug, mode)
               idx,
               #test_state.test_cases
             ),
-            { level = vim.log.levels.WARN }
+            vim.log.levels.WARN
           )
+          io_view_running = false
           return
         end
       end
@@ -686,6 +712,7 @@ function M.run_io_view(test_indices_arg, debug, mode)
 
   local io_state = state.get_io_view_state()
   if not io_state then
+    io_view_running = false
     return
   end
 
@@ -698,10 +725,8 @@ function M.run_io_view(test_indices_arg, debug, mode)
   local execute = require('cp.runner.execute')
 
   execute.compile_problem(debug, function(compile_result)
-    if gen ~= _run_gen then
-      return
-    end
     if not vim.api.nvim_buf_is_valid(io_state.output_buf) then
+      io_view_running = false
       return
     end
 
@@ -721,64 +746,43 @@ function M.run_io_view(test_indices_arg, debug, mode)
 
       local ns = vim.api.nvim_create_namespace('cp_io_view_compile_error')
       utils.update_buffer_content(io_state.output_buf, lines, highlights, ns)
+      io_view_running = false
       return
     end
 
     if mode == 'combined' then
       local combined = cache.get_combined_test(platform, contest_id, problem_id)
       if not combined then
-        logger.log('No combined test found', { level = vim.log.levels.ERROR })
+        logger.log('No combined test found', vim.log.levels.ERROR)
+        io_view_running = false
         return
       end
 
       run.load_test_cases()
 
       run.run_combined_test(debug, function(result)
-        if gen ~= _run_gen then
-          return
-        end
         if not result then
-          logger.log('Failed to run combined test', { level = vim.log.levels.ERROR })
+          logger.log('Failed to run combined test', vim.log.levels.ERROR)
+          io_view_running = false
           return
         end
 
         if vim.api.nvim_buf_is_valid(io_state.output_buf) then
           render_io_view_results(io_state, test_indices, mode, result, combined.input)
         end
+        io_view_running = false
       end)
     else
       run.run_all_test_cases(test_indices, debug, nil, function()
-        if gen ~= _run_gen then
-          return
-        end
         if vim.api.nvim_buf_is_valid(io_state.output_buf) then
           render_io_view_results(io_state, test_indices, mode, nil, nil)
         end
+        io_view_running = false
       end)
     end
   end)
 end
 
----@return nil
-function M.cancel_io_view()
-  _run_gen = _run_gen + 1
-end
-
----@return nil
-function M.cancel_interactive()
-  if state.interactive_buf and vim.api.nvim_buf_is_valid(state.interactive_buf) then
-    local job = vim.b[state.interactive_buf].terminal_job_id
-    if job then
-      vim.fn.jobstop(job)
-    end
-  end
-  if state.saved_interactive_session then
-    vim.fn.delete(state.saved_interactive_session)
-    state.saved_interactive_session = nil
-  end
-  state.set_active_panel(nil)
-end
-
 ---@param panel_opts? PanelOpts
 function M.toggle_panel(panel_opts)
   if state.get_active_panel() == 'run' then
@@ -799,7 +803,7 @@ function M.toggle_panel(panel_opts)
   end
 
   if state.get_active_panel() then
-    logger.log('another panel is already active', { level = vim.log.levels.ERROR })
+    logger.log('another panel is already active', vim.log.levels.ERROR)
     return
   end
 
@@ -808,7 +812,7 @@ function M.toggle_panel(panel_opts)
   if not platform or not contest_id then
     logger.log(
       'No platform/contest configured. Use :CP <platform> <contest> [...] first.',
-      { level = vim.log.levels.ERROR }
+      vim.log.levels.ERROR
     )
     return
   end
@@ -817,13 +821,9 @@ function M.toggle_panel(panel_opts)
   local contest_data = cache.get_contest_data(platform, contest_id)
   if
     contest_data
-    and contest_data.index_map
     and contest_data.problems[contest_data.index_map[state.get_problem_id()]].interactive
   then
-    logger.log(
-      'This is an interactive problem. Use :CP interact instead.',
-      { level = vim.log.levels.WARN }
-    )
+    logger.log('This is an interactive problem. Use :CP interact instead.', vim.log.levels.WARN)
     return
   end
 
@@ -834,17 +834,10 @@ function M.toggle_panel(panel_opts)
   logger.log(('run panel: checking test cases for %s'):format(input_file or 'none'))
 
   if not run.load_test_cases() then
-    logger.log('no test cases found', { level = vim.log.levels.WARN })
+    logger.log('no test cases found', vim.log.levels.WARN)
     return
   end
 
-  if panel_opts and panel_opts.test_index then
-    local test_state = run.get_panel_state()
-    if panel_opts.test_index >= 1 and panel_opts.test_index <= #test_state.test_cases then
-      test_state.current_index = panel_opts.test_index
-    end
-  end
-
   local io_state = state.get_io_view_state()
   if io_state then
     for _, win in ipairs(vim.api.nvim_list_wins()) do
@@ -956,15 +949,14 @@ function M.toggle_panel(panel_opts)
 
   setup_keybindings_for_buffer(test_buffers.tab_buf)
 
-  local o = config.hooks and config.hooks.on
-  if o and o.run then
-    vim.schedule(function()
-      o.run(state)
+  if config.hooks and config.hooks.before_run then
+    vim.schedule_wrap(function()
+      config.hooks.before_run(state)
     end)
   end
-  if panel_opts and panel_opts.debug and o and o.debug then
-    vim.schedule(function()
-      o.debug(state)
+  if panel_opts and panel_opts.debug and config.hooks and config.hooks.before_debug then
+    vim.schedule_wrap(function()
+      config.hooks.before_debug(state)
     end)
   end
 

lua/cp/utils.lua

@@ -2,11 +2,7 @@ local M = {}
 
 local logger = require('cp.log')
 
-local _nix_python = nil
-local _nix_submit_cmd = nil
-local _nix_discovered = false
-
-local uname = vim.uv.os_uname()
+local uname = vim.loop.os_uname()
 
 local _time_cached = false
 local _time_path = nil
@@ -61,11 +57,7 @@ local function find_gnu_time()
 
   _time_cached = true
   _time_path = nil
-  if uname and uname.sysname == 'Darwin' then
-    _time_reason = 'GNU time not found (install via: brew install coreutils)'
-  else
-    _time_reason = 'GNU time not found'
-  end
+  _time_reason = 'GNU time not found'
   return _time_path, _time_reason
 end
 
@@ -87,170 +79,7 @@ function M.get_plugin_path()
   return vim.fn.fnamemodify(plugin_path, ':h:h:h')
 end
 
----@return boolean
-function M.is_nix_build()
-  return _nix_python ~= nil
-end
-
----@return string|nil
-function M.get_nix_python()
-  return _nix_python
-end
-
----@return boolean
-function M.is_nix_discovered()
-  return _nix_discovered
-end
-
----@param module string
----@param plugin_path string
----@return string[]
-function M.get_python_cmd(module, plugin_path)
-  if _nix_python then
-    return { _nix_python, '-m', 'scrapers.' .. module }
-  end
-  return { 'uv', 'run', '--directory', plugin_path, '-m', 'scrapers.' .. module }
-end
-
----@param module string
----@param plugin_path string
----@return string[]
-function M.get_python_submit_cmd(module, plugin_path)
-  if _nix_submit_cmd then
-    return { _nix_submit_cmd, 'run', '--directory', plugin_path, '-m', 'scrapers.' .. module }
-  end
-  return { 'uv', 'run', '--directory', plugin_path, '-m', 'scrapers.' .. module }
-end
-
 local python_env_setup = false
-local _nix_submit_attempted = false
-
----@return boolean
-local function discover_nix_submit_cmd()
-  local cache_dir = vim.fn.stdpath('cache') .. '/cp-nvim'
-  local cache_file = cache_dir .. '/nix-submit'
-
-  local f = io.open(cache_file, 'r')
-  if f then
-    local cached = f:read('*l')
-    f:close()
-    if cached and vim.fn.executable(cached) == 1 then
-      _nix_submit_cmd = cached
-      return true
-    end
-  end
-
-  local plugin_path = M.get_plugin_path()
-  vim.cmd.redraw()
-  logger.log(
-    'Building submit environment...',
-    { level = vim.log.levels.INFO, override = true, sync = true }
-  )
-  vim.cmd.redraw()
-  local result = vim
-    .system(
-      { 'nix', 'build', plugin_path .. '#submitEnv', '--no-link', '--print-out-paths' },
-      { text = true }
-    )
-    :wait()
-
-  if result.code ~= 0 then
-    logger.log(
-      'nix build #submitEnv failed: ' .. (result.stderr or ''),
-      { level = vim.log.levels.WARN }
-    )
-    return false
-  end
-
-  local store_path = result.stdout:gsub('%s+$', '')
-  local submit_cmd = store_path .. '/bin/cp-nvim-submit'
-
-  if vim.fn.executable(submit_cmd) ~= 1 then
-    logger.log('nix submit cmd not executable at ' .. submit_cmd, { level = vim.log.levels.WARN })
-    return false
-  end
-
-  vim.fn.mkdir(cache_dir, 'p')
-  f = io.open(cache_file, 'w')
-  if f then
-    f:write(submit_cmd)
-    f:close()
-  end
-
-  _nix_submit_cmd = submit_cmd
-  return true
-end
-
----@return boolean
-function M.setup_nix_submit_env()
-  if _nix_submit_cmd then
-    return true
-  end
-  if _nix_submit_attempted then
-    return false
-  end
-  _nix_submit_attempted = true
-  if vim.fn.executable('nix') == 1 then
-    return discover_nix_submit_cmd()
-  end
-  return false
-end
-
----@return boolean
-local function discover_nix_python()
-  local cache_dir = vim.fn.stdpath('cache') .. '/cp-nvim'
-  local cache_file = cache_dir .. '/nix-python'
-
-  local f = io.open(cache_file, 'r')
-  if f then
-    local cached = f:read('*l')
-    f:close()
-    if cached and vim.fn.executable(cached) == 1 then
-      _nix_python = cached
-      return true
-    end
-  end
-
-  local plugin_path = M.get_plugin_path()
-  logger.log(
-    'Building Python environment with nix...',
-    { level = vim.log.levels.INFO, override = true, sync = true }
-  )
-  vim.cmd.redraw()
-  local result = vim
-    .system(
-      { 'nix', 'build', plugin_path .. '#pythonEnv', '--no-link', '--print-out-paths' },
-      { text = true }
-    )
-    :wait()
-
-  if result.code ~= 0 then
-    logger.log(
-      'nix build #pythonEnv failed: ' .. (result.stderr or ''),
-      { level = vim.log.levels.WARN }
-    )
-    return false
-  end
-
-  local store_path = result.stdout:gsub('%s+$', '')
-  local python_path = store_path .. '/bin/python3'
-
-  if vim.fn.executable(python_path) ~= 1 then
-    logger.log('nix python not executable at ' .. python_path, { level = vim.log.levels.WARN })
-    return false
-  end
-
-  vim.fn.mkdir(cache_dir, 'p')
-  f = io.open(cache_file, 'w')
-  if f then
-    f:write(python_path)
-    f:close()
-  end
-
-  _nix_python = python_path
-  _nix_discovered = true
-  return true
-end
 
 ---@return boolean success
 function M.setup_python_env()
@@ -258,23 +87,19 @@ function M.setup_python_env()
     return true
   end
 
-  if _nix_python then
-    logger.log('Python env: nix (python=' .. _nix_python .. ')')
-    python_env_setup = true
-    return true
+  local plugin_path = M.get_plugin_path()
+  local venv_dir = plugin_path .. '/.venv'
+
+  if vim.fn.executable('uv') == 0 then
+    logger.log(
+      'uv is not installed. Install it to enable problem scraping: https://docs.astral.sh/uv/',
+      vim.log.levels.WARN
+    )
+    return false
   end
 
-  local on_nixos = vim.fn.filereadable('/etc/NIXOS') == 1
-
-  if not on_nixos and vim.fn.executable('uv') == 1 then
-    local plugin_path = M.get_plugin_path()
-    logger.log('Python env: uv sync (dir=' .. plugin_path .. ')')
-    logger.log(
-      'Setting up Python environment...',
-      { level = vim.log.levels.INFO, override = true, sync = true }
-    )
-    vim.cmd.redraw()
-
+  if vim.fn.isdirectory(venv_dir) == 0 then
+    logger.log('Setting up Python environment for scrapers...')
     local env = vim.fn.environ()
     env.VIRTUAL_ENV = ''
     env.PYTHONPATH = ''
@@ -283,38 +108,18 @@ function M.setup_python_env()
       .system({ 'uv', 'sync' }, { cwd = plugin_path, text = true, env = env })
       :wait()
     if result.code ~= 0 then
-      logger.log(
-        'Failed to setup Python environment: ' .. (result.stderr or ''),
-        { level = vim.log.levels.ERROR }
-      )
+      logger.log('Failed to setup Python environment: ' .. result.stderr, vim.log.levels.ERROR)
       return false
     end
-    if result.stderr and result.stderr ~= '' then
-      logger.log('uv sync stderr: ' .. result.stderr:gsub('%s+$', ''))
-    end
-
-    python_env_setup = true
-    return true
+    logger.log('Python environment setup complete.')
   end
 
-  if vim.fn.executable('nix') == 1 then
-    logger.log('Python env: nix discovery')
-    if discover_nix_python() then
-      python_env_setup = true
-      return true
-    end
-  end
-
-  logger.log(
-    'No Python environment available. Install uv (https://docs.astral.sh/uv/) or use nix.',
-    { level = vim.log.levels.WARN }
-  )
-  return false
+  python_env_setup = true
+  return true
 end
 
 --- Configure the buffer with good defaults
 ---@param filetype? string
----@return integer
 function M.create_buffer_with_options(filetype)
   local buf = vim.api.nvim_create_buf(false, true)
   vim.api.nvim_set_option_value('bufhidden', 'hide', { buf = buf })
@@ -346,7 +151,6 @@ function M.update_buffer_content(bufnr, lines, highlights, namespace)
   end
 end
 
----@return boolean, string?
 function M.check_required_runtime()
   if is_windows() then
     return false, 'Windows is not supported'
@@ -358,16 +162,20 @@ function M.check_required_runtime()
 
   local time = M.time_capability()
   if not time.ok then
-    return false, time.reason
+    return false, 'GNU time not found: ' .. (time.reason or '')
   end
 
   local timeout = M.timeout_capability()
   if not timeout.ok then
-    return false, timeout.reason
+    return false, 'GNU timeout not found: ' .. (timeout.reason or '')
   end
 
-  if vim.fn.executable('git') ~= 1 then
-    return false, 'git is required for credential storage'
+  if vim.fn.executable('uv') ~= 1 then
+    return false, 'uv not found (https://docs.astral.sh/uv/)'
+  end
+
+  if not M.setup_python_env() then
+    return false, 'failed to set up Python virtual environment'
   end
 
   return true
@@ -417,29 +225,22 @@ local function find_gnu_timeout()
 
   _timeout_cached = true
   _timeout_path = nil
-  if uname and uname.sysname == 'Darwin' then
-    _timeout_reason = 'GNU timeout not found (install via: brew install coreutils)'
-  else
-    _timeout_reason = 'GNU timeout not found'
-  end
+  _timeout_reason = 'GNU timeout not found'
   return _timeout_path, _timeout_reason
 end
 
----@return string?
 function M.timeout_path()
   local path = find_gnu_timeout()
   return path
 end
 
----@return { ok: boolean, path: string|nil, reason: string|nil }
 function M.timeout_capability()
   local path, reason = find_gnu_timeout()
   return { ok = path ~= nil, path = path, reason = reason }
 end
 
----@return string[]
 function M.cwd_executables()
-  local uv = vim.uv
+  local uv = vim.uv or vim.loop
   local req = uv.fs_scandir('.')
   if not req then
     return {}
@@ -461,7 +262,6 @@ function M.cwd_executables()
   return out
 end
 
----@return nil
 function M.ensure_dirs()
   vim.system({ 'mkdir', '-p', 'build', 'io' }):wait()
 end

plugin/cp.lua

@@ -8,7 +8,6 @@ vim.api.nvim_create_user_command('CP', function(opts)
   cp.handle_command(opts)
 end, {
   nargs = '*',
-  bar = true,
   desc = 'Competitive programming helper',
   complete = function(ArgLead, CmdLine, _)
     local constants = require('cp.constants')
@@ -44,17 +43,9 @@ end, {
       vim.list_extend(candidates, platforms)
       table.insert(candidates, 'cache')
       table.insert(candidates, 'pick')
-      if platform then
-        table.insert(candidates, 'login')
-        table.insert(candidates, 'logout')
-      end
+
       if platform and contest_id then
-        vim.list_extend(
-          candidates,
-          vim.tbl_filter(function(a)
-            return a ~= 'pick' and a ~= 'cache'
-          end, actions)
-        )
+        vim.list_extend(candidates, actions)
         local cache = require('cp.cache')
         cache.load()
         local contest_data = cache.get_contest_data(platform, contest_id)
@@ -69,14 +60,13 @@ end, {
       return filter_candidates(candidates)
     elseif num_args == 3 then
       if vim.tbl_contains(platforms, args[2]) then
-        local candidates = { 'login', 'logout', 'signup' }
         local cache = require('cp.cache')
         cache.load()
-        vim.list_extend(candidates, cache.get_cached_contest_ids(args[2]))
-        return filter_candidates(candidates)
+        local contests = cache.get_cached_contest_ids(args[2])
+        return filter_candidates(contests)
       elseif args[2] == 'cache' then
         return filter_candidates({ 'clear', 'read' })
-      elseif args[2] == 'stress' or args[2] == 'interact' then
+      elseif args[2] == 'interact' then
         local utils = require('cp.utils')
         return filter_candidates(utils.cwd_executables())
       elseif args[2] == 'edit' then
@@ -113,8 +103,6 @@ end, {
           end
         end
         return filter_candidates(candidates)
-      elseif args[2] == 'open' then
-        return filter_candidates({ 'problem', 'contest', 'standings' })
       elseif args[2] == 'next' or args[2] == 'prev' or args[2] == 'pick' then
         return filter_candidates({ '--lang' })
       else
@@ -124,10 +112,7 @@ end, {
         end
       end
     elseif num_args == 4 then
-      if args[2] == 'stress' then
-        local utils = require('cp.utils')
-        return filter_candidates(utils.cwd_executables())
-      elseif args[2] == 'cache' and args[3] == 'clear' then
+      if args[2] == 'cache' and args[3] == 'clear' then
         local candidates = vim.list_extend({}, platforms)
         table.insert(candidates, '')
         return filter_candidates(candidates)
@@ -141,9 +126,6 @@ end, {
         cache.load()
         local contest_data = cache.get_contest_data(args[2], args[3])
         local candidates = { '--lang' }
-        if not require('cp.race').status().active then
-          table.insert(candidates, '--race')
-        end
         if contest_data and contest_data.problems then
           for _, problem in ipairs(contest_data.problems) do
             table.insert(candidates, problem.id)
@@ -158,47 +140,17 @@ end, {
         local contests = cache.get_cached_contest_ids(args[4])
         return filter_candidates(contests)
       elseif vim.tbl_contains(platforms, args[2]) then
-        if args[3] == '--race' then
-          return filter_candidates({ '--lang' })
-        elseif args[4] == '--lang' then
+        if args[4] == '--lang' then
           return filter_candidates(get_enabled_languages(args[2]))
-        elseif args[3] == '--lang' then
-          local candidates = {}
-          if not require('cp.race').status().active then
-            table.insert(candidates, '--race')
-          end
-          return filter_candidates(candidates)
         else
           return filter_candidates({ '--lang' })
         end
       end
     elseif num_args == 6 then
-      if vim.tbl_contains(platforms, args[2]) then
-        if args[3] == '--race' and args[4] == '--lang' then
-          return filter_candidates(get_enabled_languages(args[2]))
-        elseif args[3] == '--lang' and args[5] == '--race' then
-          return {}
-        elseif args[5] == '--lang' then
-          return filter_candidates(get_enabled_languages(args[2]))
-        end
+      if vim.tbl_contains(platforms, args[2]) and args[5] == '--lang' then
+        return filter_candidates(get_enabled_languages(args[2]))
       end
     end
     return {}
   end,
 })
-
-local function cp_action(action)
-  return function()
-    require('cp').handle_command({ fargs = { action } })
-  end
-end
-
-vim.keymap.set('n', '<Plug>(cp-run)', cp_action('run'), { desc = 'CP run tests' })
-vim.keymap.set('n', '<Plug>(cp-panel)', cp_action('panel'), { desc = 'CP open panel' })
-vim.keymap.set('n', '<Plug>(cp-edit)', cp_action('edit'), { desc = 'CP edit test cases' })
-vim.keymap.set('n', '<Plug>(cp-next)', cp_action('next'), { desc = 'CP next problem' })
-vim.keymap.set('n', '<Plug>(cp-prev)', cp_action('prev'), { desc = 'CP previous problem' })
-vim.keymap.set('n', '<Plug>(cp-pick)', cp_action('pick'), { desc = 'CP pick contest' })
-vim.keymap.set('n', '<Plug>(cp-interact)', cp_action('interact'), { desc = 'CP interactive mode' })
-vim.keymap.set('n', '<Plug>(cp-stress)', cp_action('stress'), { desc = 'CP stress test' })
-vim.keymap.set('n', '<Plug>(cp-submit)', cp_action('submit'), { desc = 'CP submit solution' })

pyproject.toml

@@ -7,11 +7,13 @@ requires-python = ">=3.11"
 dependencies = [
     "backoff>=2.2.1",
     "beautifulsoup4>=4.13.5",
-    "scrapling[fetchers]>=0.4",
+    "curl-cffi>=0.13.0",
     "httpx>=0.28.1",
     "ndjson>=0.3.1",
     "pydantic>=2.11.10",
     "requests>=2.32.5",
+    "scrapling[fetchers]>=0.3.5",
+    "types-requests>=2.32.4.20250913",
 ]
 
 [dependency-groups]

scrapers/atcoder.py

@@ -2,9 +2,8 @@
 
 import asyncio
 import json
-import os
 import re
-import subprocess
+import sys
 import time
 from typing import Any
 
@@ -15,126 +14,21 @@ from bs4 import BeautifulSoup, Tag
 from requests.adapters import HTTPAdapter
 from urllib3.util.retry import Retry
 
-from .base import (
-    BaseScraper,
-    clear_platform_cookies,
-    extract_precision,
-    load_platform_cookies,
-    save_platform_cookies,
-)
+from .base import BaseScraper
 from .models import (
+    CombinedTest,
     ContestListResult,
     ContestSummary,
-    LoginResult,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
+    TestsResult,
 )
-from .timeouts import (
-    BROWSER_ELEMENT_WAIT,
-    BROWSER_NAV_TIMEOUT,
-    BROWSER_SESSION_TIMEOUT,
-    BROWSER_SUBMIT_NAV_TIMEOUT,
-    BROWSER_TURNSTILE_POLL,
-    HTTP_TIMEOUT,
-)
-
-_LANGUAGE_ID_EXTENSION: dict[str, str] = {
-    "6002": "ada",
-    "6003": "apl",
-    "6004": "asm",
-    "6005": "asm",
-    "6006": "awk",
-    "6008": "sh",
-    "6009": "bas",
-    "6010": "bc",
-    "6012": "bf",
-    "6013": "c",
-    "6014": "c",
-    "6015": "cs",
-    "6016": "cs",
-    "6017": "cc",
-    "6021": "clj",
-    "6022": "clj",
-    "6023": "clj",
-    "6025": "cljs",
-    "6026": "cob",
-    "6027": "lisp",
-    "6028": "cr",
-    "6030": "d",
-    "6031": "d",
-    "6032": "d",
-    "6033": "dart",
-    "6038": "ex",
-    "6039": "el",
-    "6041": "erl",
-    "6042": "fs",
-    "6043": "factor",
-    "6044": "fish",
-    "6045": "fth",
-    "6046": "f90",
-    "6047": "f90",
-    "6048": "f",
-    "6049": "gleam",
-    "6050": "go",
-    "6051": "go",
-    "6052": "hs",
-    "6053": "hx",
-    "6054": "cc",
-    "6056": "java",
-    "6057": "js",
-    "6058": "js",
-    "6059": "js",
-    "6060": "jule",
-    "6061": "kk",
-    "6062": "kt",
-    "6065": "lean",
-    "6066": "ll",
-    "6067": "lua",
-    "6068": "lua",
-    "6071": "nim",
-    "6072": "nim",
-    "6073": "ml",
-    "6074": "m",
-    "6075": "pas",
-    "6076": "pl",
-    "6077": "php",
-    "6079": "pony",
-    "6080": "ps1",
-    "6081": "pro",
-    "6082": "py",
-    "6083": "py",
-    "6084": "r",
-    "6085": "re",
-    "6086": "rb",
-    "6087": "rb",
-    "6088": "rs",
-    "6089": "py",
-    "6090": "scala",
-    "6091": "scala",
-    "6092": "scm",
-    "6093": "scm",
-    "6094": "sd7",
-    "6095": "swift",
-    "6096": "tcl",
-    "6100": "ts",
-    "6101": "ts",
-    "6102": "ts",
-    "6105": "v",
-    "6106": "vala",
-    "6107": "v",
-    "6109": "wat",
-    "6111": "zig",
-    "6114": "jl",
-    "6115": "py",
-    "6116": "cc",
-    "6118": "sql",
-}
 
 MIB_TO_MB = 1.048576
 BASE_URL = "https://atcoder.jp"
 ARCHIVE_URL = f"{BASE_URL}/contests/archive"
+TIMEOUT_SECONDS = 30
 HEADERS = {
     "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
 }
@@ -177,7 +71,7 @@ def _retry_after_requests(details):
     on_backoff=_retry_after_requests,
 )
 def _fetch(url: str) -> str:
-    r = _session.get(url, headers=HEADERS, timeout=HTTP_TIMEOUT)
+    r = _session.get(url, headers=HEADERS, timeout=TIMEOUT_SECONDS)
     if r.status_code in RETRY_STATUS:
         raise requests.HTTPError(response=r)
     r.raise_for_status()
@@ -200,7 +94,7 @@ def _giveup_httpx(exc: Exception) -> bool:
     giveup=_giveup_httpx,
 )
 async def _get_async(client: httpx.AsyncClient, url: str) -> str:
-    r = await client.get(url, headers=HEADERS, timeout=HTTP_TIMEOUT)
+    r = await client.get(url, headers=HEADERS, timeout=TIMEOUT_SECONDS)
     r.raise_for_status()
     return r.text
 
@@ -227,23 +121,6 @@ def _parse_last_page(html: str) -> int:
     return max(nums) if nums else 1
 
 
-def _parse_start_time(tr: Tag) -> int | None:
-    tds = tr.select("td")
-    if not tds:
-        return None
-    time_el = tds[0].select_one("time.fixtime-full")
-    if not time_el:
-        return None
-    text = time_el.get_text(strip=True)
-    try:
-        from datetime import datetime
-
-        dt = datetime.strptime(text, "%Y-%m-%d %H:%M:%S%z")
-        return int(dt.timestamp())
-    except (ValueError, TypeError):
-        return None
-
-
 def _parse_archive_contests(html: str) -> list[ContestSummary]:
     soup = BeautifulSoup(html, "html.parser")
     tbody = soup.select_one("table.table-default tbody") or soup.select_one("tbody")
@@ -262,10 +139,7 @@ def _parse_archive_contests(html: str) -> list[ContestSummary]:
             continue
         cid = m.group(1)
         name = a.get_text(strip=True)
-        start_time = _parse_start_time(tr)
-        out.append(
-            ContestSummary(id=cid, name=name, display_name=name, start_time=start_time)
-        )
+        out.append(ContestSummary(id=cid, name=name, display_name=name))
     return out
 
 
@@ -295,7 +169,7 @@ def _parse_tasks_list(html: str) -> list[dict[str, str]]:
     return rows
 
 
-def _extract_problem_info(html: str) -> tuple[int, float, bool, float | None]:
+def _extract_problem_info(html: str) -> tuple[int, float, bool]:
     soup = BeautifulSoup(html, "html.parser")
     txt = soup.get_text(" ", strip=True)
     timeout_ms = 0
@@ -307,10 +181,9 @@ def _extract_problem_info(html: str) -> tuple[int, float, bool, float | None]:
     if ms:
         memory_mb = float(ms.group(1)) * MIB_TO_MB
     div = soup.select_one("#problem-statement")
-    body = div.get_text(" ", strip=True) if div else soup.get_text(" ", strip=True)
-    interactive = "This is an interactive" in body
-    precision = extract_precision(body)
-    return timeout_ms, memory_mb, interactive, precision
+    txt = div.get_text(" ", strip=True) if div else soup.get_text(" ", strip=True)
+    interactive = "This is an interactive" in txt
+    return timeout_ms, memory_mb, interactive
 
 
 def _extract_samples(html: str) -> list[TestCase]:
@@ -336,286 +209,6 @@ def _extract_samples(html: str) -> list[TestCase]:
     return cases
 
 
-_TURNSTILE_JS = "() => { const el = document.querySelector('[name=\"cf-turnstile-response\"]'); return el && el.value.length > 0; }"
-
-
-def _solve_turnstile(page) -> None:
-    if page.evaluate(_TURNSTILE_JS):
-        return
-    iframe_loc = page.locator('iframe[src*="challenges.cloudflare.com"]')
-    if not iframe_loc.count():
-        return
-    for _ in range(6):
-        try:
-            box = iframe_loc.first.bounding_box()
-            if box:
-                page.mouse.click(
-                    box["x"] + box["width"] * 0.15,
-                    box["y"] + box["height"] * 0.5,
-                )
-        except Exception:
-            pass
-        try:
-            page.wait_for_function(_TURNSTILE_JS, timeout=BROWSER_TURNSTILE_POLL)
-            return
-        except Exception:
-            pass
-    raise RuntimeError("Turnstile not solved after multiple attempts")
-
-
-def _ensure_browser() -> None:
-    try:
-        from patchright._impl._driver import compute_driver_executable  # type: ignore[import-untyped,unresolved-import]
-
-        node, cli = compute_driver_executable()
-    except Exception:
-        return
-    browser_info = subprocess.run(
-        [node, cli, "install", "--dry-run", "chromium"],
-        capture_output=True,
-        text=True,
-    )
-    for line in browser_info.stdout.splitlines():
-        if "Install location:" in line:
-            install_dir = line.split(":", 1)[1].strip()
-            if not os.path.isdir(install_dir):
-                print(json.dumps({"status": "installing_browser"}), flush=True)
-                subprocess.run([node, cli, "install", "chromium"], check=True)
-            break
-
-
-def _at_check_logged_in(page) -> bool:
-    return page.evaluate(
-        "() => Array.from(document.querySelectorAll('a')).some(a => a.textContent.trim() === 'Sign Out')"
-    )
-
-
-def _at_login_action(credentials: dict[str, str]):
-    login_error: str | None = None
-
-    def login_action(page):
-        nonlocal login_error
-        try:
-            _solve_turnstile(page)
-            page.fill('input[name="username"]', credentials.get("username", ""))
-            page.fill('input[name="password"]', credentials.get("password", ""))
-            page.click("#submit")
-            page.wait_for_function(
-                "() => !window.location.href.includes('/login') || !!document.querySelector('.alert-danger')",
-                timeout=BROWSER_NAV_TIMEOUT,
-            )
-            if "/login" in page.url:
-                login_error = "bad_credentials"
-                return
-        except Exception as e:
-            login_error = str(e)
-
-    return login_action, lambda: login_error
-
-
-def _login_headless(credentials: dict[str, str]) -> LoginResult:
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return LoginResult(
-            success=False,
-            error="scrapling is required for AtCoder login. Install it: uv add 'scrapling[fetchers]>=0.4'",
-        )
-
-    _ensure_browser()
-
-    saved_cookies = load_platform_cookies("atcoder") or []
-
-    if saved_cookies:
-        print(json.dumps({"status": "checking_login"}), flush=True)
-        logged_in = False
-
-        def check_action(page):
-            nonlocal logged_in
-            logged_in = _at_check_logged_in(page)
-
-        try:
-            with StealthySession(
-                headless=True,
-                timeout=BROWSER_SESSION_TIMEOUT,
-                google_search=False,
-                cookies=saved_cookies,
-            ) as session:
-                session.fetch(
-                    f"{BASE_URL}/home", page_action=check_action, network_idle=True
-                )
-            if logged_in:
-                return LoginResult(success=True, error="")
-        except Exception:
-            pass
-
-    login_action, get_error = _at_login_action(credentials)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=BROWSER_SESSION_TIMEOUT,
-            google_search=False,
-        ) as session:
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            session.fetch(
-                f"{BASE_URL}/login",
-                page_action=login_action,
-                solve_cloudflare=True,
-            )
-            login_error = get_error()
-            if login_error == "bad_credentials":
-                return LoginResult(success=False, error="bad_credentials")
-            elif login_error:
-                return LoginResult(success=False, error=f"Login failed: {login_error}")
-
-            logged_in = False
-
-            def verify_action(page):
-                nonlocal logged_in
-                logged_in = _at_check_logged_in(page)
-
-            session.fetch(
-                f"{BASE_URL}/home", page_action=verify_action, network_idle=True
-            )
-            if not logged_in:
-                return LoginResult(success=False, error="bad_credentials")
-
-            try:
-                browser_cookies = session.context.cookies()
-                if browser_cookies:
-                    save_platform_cookies("atcoder", browser_cookies)
-            except Exception:
-                pass
-
-        return LoginResult(success=True, error="")
-    except Exception as e:
-        return LoginResult(success=False, error=str(e))
-
-
-def _submit_headless(
-    contest_id: str,
-    problem_id: str,
-    file_path: str,
-    language_id: str,
-    credentials: dict[str, str],
-    _retried: bool = False,
-) -> "SubmitResult":
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return SubmitResult(
-            success=False,
-            error="scrapling is required for AtCoder submit. Install it: uv add 'scrapling[fetchers]>=0.4'",
-        )
-
-    _ensure_browser()
-
-    saved_cookies: list[dict[str, Any]] = []
-    if not _retried:
-        saved_cookies = load_platform_cookies("atcoder") or []
-
-    logged_in = bool(saved_cookies)
-    submit_error: str | None = None
-    needs_relogin = False
-
-    def check_login(page):
-        nonlocal logged_in
-        logged_in = _at_check_logged_in(page)
-
-    login_action, get_login_error = _at_login_action(credentials)
-
-    def submit_action(page):
-        nonlocal submit_error, needs_relogin
-        if "/login" in page.url:
-            needs_relogin = True
-            return
-        try:
-            _solve_turnstile(page)
-            page.select_option(
-                'select[name="data.TaskScreenName"]',
-                f"{contest_id}_{problem_id}",
-            )
-            page.locator(
-                f'select[name="data.LanguageId"] option[value="{language_id}"]'
-            ).wait_for(state="attached", timeout=BROWSER_ELEMENT_WAIT)
-            page.select_option('select[name="data.LanguageId"]', language_id)
-            page.set_input_files("#input-open-file", file_path)
-            page.wait_for_function(
-                "() => { const ta = document.getElementById('plain-textarea'); return ta && ta.value.length > 0; }",
-                timeout=BROWSER_ELEMENT_WAIT,
-            )
-            page.evaluate("document.getElementById('submit').click()")
-            page.wait_for_url(
-                lambda url: "/submissions/me" in url,
-                timeout=BROWSER_SUBMIT_NAV_TIMEOUT["atcoder"],
-            )
-        except Exception as e:
-            submit_error = str(e)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=BROWSER_SESSION_TIMEOUT,
-            google_search=False,
-            cookies=saved_cookies if saved_cookies else [],
-        ) as session:
-            if not _retried and saved_cookies:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                session.fetch(
-                    f"{BASE_URL}/home", page_action=check_login, network_idle=True
-                )
-
-            if not logged_in:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                session.fetch(
-                    f"{BASE_URL}/login",
-                    page_action=login_action,
-                    solve_cloudflare=True,
-                )
-                login_error = get_login_error()
-                if login_error == "bad_credentials":
-                    return SubmitResult(success=False, error="bad_credentials")
-                elif login_error:
-                    return SubmitResult(
-                        success=False, error=f"Login failed: {login_error}"
-                    )
-                logged_in = True
-                try:
-                    browser_cookies = session.context.cookies()
-                    if browser_cookies:
-                        save_platform_cookies("atcoder", browser_cookies)
-                except Exception:
-                    pass
-
-            print(json.dumps({"status": "submitting"}), flush=True)
-            session.fetch(
-                f"{BASE_URL}/contests/{contest_id}/submit",
-                page_action=submit_action,
-                solve_cloudflare=True,
-            )
-
-        if needs_relogin and not _retried:
-            clear_platform_cookies("atcoder")
-            return _submit_headless(
-                contest_id,
-                problem_id,
-                file_path,
-                language_id,
-                credentials,
-                _retried=True,
-            )
-
-        if submit_error:
-            return SubmitResult(success=False, error=submit_error)
-
-        return SubmitResult(
-            success=True, error="", submission_id="", verdict="submitted"
-        )
-    except Exception as e:
-        return SubmitResult(success=False, error=str(e))
-
-
 def _scrape_tasks_sync(contest_id: str) -> list[dict[str, str]]:
     html = _fetch(f"{BASE_URL}/contests/{contest_id}/tasks")
     return _parse_tasks_list(html)
@@ -627,13 +220,12 @@ def _scrape_problem_page_sync(contest_id: str, slug: str) -> dict[str, Any]:
         tests = _extract_samples(html)
     except Exception:
         tests = []
-    timeout_ms, memory_mb, interactive, precision = _extract_problem_info(html)
+    timeout_ms, memory_mb, interactive = _extract_problem_info(html)
     return {
         "tests": tests,
         "timeout_ms": timeout_ms,
         "memory_mb": memory_mb,
         "interactive": interactive,
-        "precision": precision,
     }
 
 
@@ -649,29 +241,14 @@ def _to_problem_summaries(rows: list[dict[str, str]]) -> list[ProblemSummary]:
     return out
 
 
-async def _fetch_upcoming_contests_async(
-    client: httpx.AsyncClient,
-) -> list[ContestSummary]:
-    try:
-        html = await _get_async(client, f"{BASE_URL}/contests/")
-        return _parse_archive_contests(html)
-    except Exception:
-        return []
-
-
 async def _fetch_all_contests_async() -> list[ContestSummary]:
     async with httpx.AsyncClient(
         limits=httpx.Limits(max_connections=100, max_keepalive_connections=100),
     ) as client:
-        upcoming = await _fetch_upcoming_contests_async(client)
         first_html = await _get_async(client, ARCHIVE_URL)
         last = _parse_last_page(first_html)
         out = _parse_archive_contests(first_html)
         if last <= 1:
-            seen = {c.id for c in out}
-            for c in upcoming:
-                if c.id not in seen:
-                    out.append(c)
             return out
         tasks = [
             asyncio.create_task(_get_async(client, f"{ARCHIVE_URL}?page={p}"))
@@ -680,10 +257,6 @@ async def _fetch_all_contests_async() -> list[ContestSummary]:
         for coro in asyncio.as_completed(tasks):
             html = await coro
             out.extend(_parse_archive_contests(html))
-        seen = {c.id for c in out}
-        for c in upcoming:
-            if c.id not in seen:
-                out.append(c)
         return out
 
 
@@ -706,8 +279,6 @@ class AtcoderScraper(BaseScraper):
                 contest_id=contest_id,
                 problems=problems,
                 url=f"https://atcoder.jp/contests/{contest_id}/tasks/{contest_id}_%s",
-                contest_url=f"https://atcoder.jp/contests/{contest_id}",
-                standings_url=f"https://atcoder.jp/contests/{contest_id}/standings",
             )
         except Exception as e:
             return self._metadata_error(str(e))
@@ -748,7 +319,6 @@ class AtcoderScraper(BaseScraper):
                         "memory_mb": data.get("memory_mb", 0),
                         "interactive": bool(data.get("interactive")),
                         "multi_test": False,
-                        "precision": data.get("precision"),
                     }
                 ),
                 flush=True,
@@ -756,28 +326,74 @@ class AtcoderScraper(BaseScraper):
 
         await asyncio.gather(*(emit(r) for r in rows))
 
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return await asyncio.to_thread(
-            _submit_headless,
-            contest_id,
-            problem_id,
-            file_path,
-            language_id,
-            credentials,
-        )
 
-    async def login(self, credentials: dict[str, str]) -> LoginResult:
-        if not credentials.get("username") or not credentials.get("password"):
-            return self._login_error("Missing username or password")
-        return await asyncio.to_thread(_login_headless, credentials)
+async def main_async() -> int:
+    if len(sys.argv) < 2:
+        result = MetadataResult(
+            success=False,
+            error="Usage: atcoder.py metadata <contest_id> OR atcoder.py tests <contest_id> OR atcoder.py contests",
+            url="",
+        )
+        print(result.model_dump_json())
+        return 1
+
+    mode: str = sys.argv[1]
+    scraper = AtcoderScraper()
+
+    if mode == "metadata":
+        if len(sys.argv) != 3:
+            result = MetadataResult(
+                success=False,
+                error="Usage: atcoder.py metadata <contest_id>",
+                url="",
+            )
+            print(result.model_dump_json())
+            return 1
+        contest_id = sys.argv[2]
+        result = await scraper.scrape_contest_metadata(contest_id)
+        print(result.model_dump_json())
+        return 0 if result.success else 1
+
+    if mode == "tests":
+        if len(sys.argv) != 3:
+            tests_result = TestsResult(
+                success=False,
+                error="Usage: atcoder.py tests <contest_id>",
+                problem_id="",
+                combined=CombinedTest(input="", expected=""),
+                tests=[],
+                timeout_ms=0,
+                memory_mb=0,
+            )
+            print(tests_result.model_dump_json())
+            return 1
+        contest_id = sys.argv[2]
+        await scraper.stream_tests_for_category_async(contest_id)
+        return 0
+
+    if mode == "contests":
+        if len(sys.argv) != 2:
+            contest_result = ContestListResult(
+                success=False, error="Usage: atcoder.py contests"
+            )
+            print(contest_result.model_dump_json())
+            return 1
+        contest_result = await scraper.scrape_contest_list()
+        print(contest_result.model_dump_json())
+        return 0 if contest_result.success else 1
+
+    result = MetadataResult(
+        success=False,
+        error="Unknown mode. Use 'metadata <contest_id>', 'tests <contest_id>', or 'contests'",
+        url="",
+    )
+    print(result.model_dump_json())
+    return 1
+
+
+def main() -> None:
+    sys.exit(asyncio.run(main_async()))
 
 
 if __name__ == "__main__":
-    AtcoderScraper().run_cli()
+    main()

scrapers/base.py

@@ -1,83 +1,8 @@
 import asyncio
-import json
-import os
-import re
 import sys
-import tempfile
 from abc import ABC, abstractmethod
-from pathlib import Path
-from typing import Any
 
-from .language_ids import get_language_id
-from .models import (
-    CombinedTest,
-    ContestListResult,
-    LoginResult,
-    MetadataResult,
-    SubmitResult,
-    TestsResult,
-)
-
-_COOKIE_FILE = Path.home() / ".cache" / "cp-nvim" / "cookies.json"
-
-
-def _atomic_write(path: Path, content: str) -> None:
-    fd, tmp = tempfile.mkstemp(dir=path.parent, prefix=".tmp-")
-    try:
-        os.fchmod(fd, 0o600)
-        with os.fdopen(fd, "w") as f:
-            f.write(content)
-        os.replace(tmp, path)
-    except BaseException:
-        os.unlink(tmp)
-        raise
-
-
-def load_platform_cookies(platform: str) -> Any | None:
-    try:
-        data = json.loads(_COOKIE_FILE.read_text())
-        return data.get(platform)
-    except Exception:
-        return None
-
-
-def save_platform_cookies(platform: str, data: Any) -> None:
-    _COOKIE_FILE.parent.mkdir(parents=True, exist_ok=True, mode=0o700)
-    try:
-        existing = json.loads(_COOKIE_FILE.read_text())
-    except Exception:
-        existing = {}
-    existing[platform] = data
-    _atomic_write(_COOKIE_FILE, json.dumps(existing))
-
-
-def clear_platform_cookies(platform: str) -> None:
-    try:
-        existing = json.loads(_COOKIE_FILE.read_text())
-        existing.pop(platform, None)
-        _atomic_write(_COOKIE_FILE, json.dumps(existing))
-    except Exception:
-        pass
-
-
-_PRECISION_ABS_REL_RE = re.compile(
-    r"(?:absolute|relative)\s+error[^.]*?10\s*[\^{]\s*\{?\s*[-\u2212]\s*(\d+)\s*\}?",
-    re.IGNORECASE,
-)
-_PRECISION_DECIMAL_RE = re.compile(
-    r"round(?:ed)?\s+to\s+(\d+)\s+decimal\s+place",
-    re.IGNORECASE,
-)
-
-
-def extract_precision(text: str) -> float | None:
-    m = _PRECISION_ABS_REL_RE.search(text)
-    if m:
-        return 10 ** -int(m.group(1))
-    m = _PRECISION_DECIMAL_RE.search(text)
-    if m:
-        return 10 ** -int(m.group(1))
-    return None
+from .models import CombinedTest, ContestListResult, MetadataResult, TestsResult
 
 
 class BaseScraper(ABC):
@@ -94,22 +19,9 @@ class BaseScraper(ABC):
     @abstractmethod
     async def stream_tests_for_category_async(self, category_id: str) -> None: ...
 
-    @abstractmethod
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult: ...
-
-    @abstractmethod
-    async def login(self, credentials: dict[str, str]) -> LoginResult: ...
-
     def _usage(self) -> str:
         name = self.platform_name
-        return f"Usage: {name}.py metadata <id> | tests <id> | contests | login"
+        return f"Usage: {name}.py metadata <id> | tests <id> | contests"
 
     def _metadata_error(self, msg: str) -> MetadataResult:
         return MetadataResult(success=False, error=msg, url="")
@@ -128,12 +40,6 @@ class BaseScraper(ABC):
     def _contests_error(self, msg: str) -> ContestListResult:
         return ContestListResult(success=False, error=msg)
 
-    def _submit_error(self, msg: str) -> SubmitResult:
-        return SubmitResult(success=False, error=msg)
-
-    def _login_error(self, msg: str) -> LoginResult:
-        return LoginResult(success=False, error=msg)
-
     async def _run_cli_async(self, args: list[str]) -> int:
         if len(args) < 2:
             print(self._metadata_error(self._usage()).model_dump_json())
@@ -165,36 +71,6 @@ class BaseScraper(ABC):
                 print(result.model_dump_json())
                 return 0 if result.success else 1
 
-            case "submit":
-                if len(args) != 6:
-                    print(
-                        self._submit_error(
-                            "Usage: <platform> submit <contest_id> <problem_id> <language_id> <file_path>"
-                        ).model_dump_json()
-                    )
-                    return 1
-                creds_raw = sys.stdin.read()
-                try:
-                    credentials = json.loads(creds_raw)
-                except json.JSONDecodeError:
-                    credentials = {}
-                language_id = get_language_id(self.platform_name, args[4]) or args[4]
-                result = await self.submit(
-                    args[2], args[3], args[5], language_id, credentials
-                )
-                print(result.model_dump_json())
-                return 0 if result.success else 1
-
-            case "login":
-                creds_raw = sys.stdin.read()
-                try:
-                    credentials = json.loads(creds_raw)
-                except json.JSONDecodeError:
-                    credentials = {}
-                result = await self.login(credentials)
-                print(result.model_dump_json())
-                return 0 if result.success else 1
-
             case _:
                 print(
                     self._metadata_error(

scrapers/codechef.py

@@ -3,290 +3,55 @@
 import asyncio
 import json
 import re
-from datetime import datetime
-from pathlib import Path
 from typing import Any
 
 import httpx
+from scrapling.fetchers import Fetcher
 
-from .base import (
-    BaseScraper,
-    clear_platform_cookies,
-    load_platform_cookies,
-    save_platform_cookies,
-)
-from .timeouts import BROWSER_NAV_TIMEOUT, BROWSER_SESSION_TIMEOUT, HTTP_TIMEOUT
+from .base import BaseScraper
 from .models import (
     ContestListResult,
     ContestSummary,
-    LoginResult,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
 )
 
 BASE_URL = "https://www.codechef.com"
 API_CONTESTS_ALL = "/api/list/contests/all"
-API_CONTESTS_PAST = "/api/list/contests/past"
 API_CONTEST = "/api/contests/{contest_id}"
 API_PROBLEM = "/api/contests/{contest_id}/problems/{problem_id}"
+PROBLEM_URL = "https://www.codechef.com/problems/{problem_id}"
 HEADERS = {
     "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
 }
+TIMEOUT_S = 15.0
 CONNECTIONS = 8
+MEMORY_LIMIT_RE = re.compile(
+    r"Memory\s+[Ll]imit.*?([0-9.]+)\s*(MB|GB)", re.IGNORECASE | re.DOTALL
+)
 
 
-_CC_CHECK_LOGIN_JS = "() => !!document.querySelector('a[href*=\"/users/\"]')"
-
-_CC_LANG_IDS: dict[str, str] = {
-    "C++": "42",
-    "PYTH 3": "116",
-    "JAVA": "10",
-    "PYPY3": "109",
-    "GO": "114",
-    "rust": "93",
-    "KTLN": "47",
-    "NODEJS": "56",
-    "TS": "35",
-}
-
-
-async def fetch_json(client: httpx.AsyncClient, path: str) -> dict[str, Any]:
-    r = await client.get(BASE_URL + path, headers=HEADERS, timeout=HTTP_TIMEOUT)
+async def fetch_json(client: httpx.AsyncClient, path: str) -> dict:
+    r = await client.get(BASE_URL + path, headers=HEADERS, timeout=TIMEOUT_S)
     r.raise_for_status()
     return r.json()
 
 
-def _login_headless_codechef(credentials: dict[str, str]) -> LoginResult:
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return LoginResult(
-            success=False,
-            error="scrapling is required for CodeChef login",
-        )
-
-    from .atcoder import _ensure_browser
-
-    _ensure_browser()
-
-    logged_in = False
-    login_error: str | None = None
-
-    def check_login(page):
-        nonlocal logged_in
-        logged_in = "dashboard" in page.url or page.evaluate(_CC_CHECK_LOGIN_JS)
-
-    def login_action(page):
-        nonlocal login_error
-        try:
-            page.locator('input[name="name"]').fill(credentials.get("username", ""))
-            page.locator('input[name="pass"]').fill(credentials.get("password", ""))
-            page.locator("input.cc-login-btn").click()
-            page.wait_for_function(
-                "() => !window.location.href.includes('/login') || !!document.querySelector('div.error')",
-                timeout=BROWSER_NAV_TIMEOUT,
-            )
-            if "/login" in page.url:
-                login_error = "bad_credentials"
-                return
-        except Exception as e:
-            login_error = str(e)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=BROWSER_SESSION_TIMEOUT,
-            google_search=False,
-        ) as session:
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            session.fetch(f"{BASE_URL}/login", page_action=login_action)
-            if login_error:
-                return LoginResult(success=False, error=login_error)
-
-            session.fetch(f"{BASE_URL}/", page_action=check_login, network_idle=True)
-            if not logged_in:
-                return LoginResult(success=False, error="bad_credentials")
-
-            try:
-                browser_cookies = session.context.cookies()
-                if browser_cookies:
-                    save_platform_cookies("codechef", browser_cookies)
-            except Exception:
-                pass
-
-        return LoginResult(success=True, error="")
-    except Exception as e:
-        return LoginResult(success=False, error=str(e))
+def _extract_memory_limit(html: str) -> float:
+    m = MEMORY_LIMIT_RE.search(html)
+    if not m:
+        return 256.0
+    value = float(m.group(1))
+    unit = m.group(2).upper()
+    if unit == "GB":
+        return value * 1024.0
+    return value
 
 
-def _submit_headless_codechef(
-    contest_id: str,
-    problem_id: str,
-    file_path: str,
-    language_id: str,
-    credentials: dict[str, str],
-    _retried: bool = False,
-    _practice: bool = False,
-) -> SubmitResult:
-    source_code = Path(file_path).read_text()
-
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return SubmitResult(
-            success=False,
-            error="scrapling is required for CodeChef submit",
-        )
-
-    from .atcoder import _ensure_browser
-
-    _ensure_browser()
-
-    saved_cookies: list[dict[str, Any]] = []
-    if not _retried:
-        saved_cookies = load_platform_cookies("codechef") or []
-
-    logged_in = bool(saved_cookies)
-    login_error: str | None = None
-    submit_error: str | None = None
-    needs_relogin = False
-
-    def check_login(page):
-        nonlocal logged_in
-        logged_in = "dashboard" in page.url or page.evaluate(_CC_CHECK_LOGIN_JS)
-
-    def login_action(page):
-        nonlocal login_error
-        try:
-            page.locator('input[name="name"]').fill(credentials.get("username", ""))
-            page.locator('input[name="pass"]').fill(credentials.get("password", ""))
-            page.locator("input.cc-login-btn").click()
-            page.wait_for_function(
-                "() => !window.location.href.includes('/login') || !!document.querySelector('div.error')",
-                timeout=BROWSER_NAV_TIMEOUT,
-            )
-            if "/login" in page.url:
-                login_error = "bad_credentials"
-                return
-        except Exception as e:
-            login_error = str(e)
-
-    def submit_action(page):
-        nonlocal submit_error, needs_relogin
-        if "/login" in page.url:
-            needs_relogin = True
-            return
-        try:
-            page.wait_for_selector('[aria-haspopup="listbox"]', timeout=10000)
-
-            page.locator('[aria-haspopup="listbox"]').click()
-            page.wait_for_selector('[role="option"]', timeout=5000)
-            page.locator(f'[role="option"][data-value="{language_id}"]').click()
-            page.wait_for_timeout(250)
-
-            page.locator(".ace_editor").click()
-            page.keyboard.press("Control+a")
-            page.evaluate(
-                """(code) => {
-                    const textarea = document.querySelector('.ace_text-input');
-                    const dt = new DataTransfer();
-                    dt.setData('text/plain', code);
-                    textarea.dispatchEvent(new ClipboardEvent('paste', {
-                        clipboardData: dt, bubbles: true, cancelable: true
-                    }));
-                }""",
-                source_code,
-            )
-            page.wait_for_timeout(125)
-
-            page.evaluate(
-                "() => document.getElementById('submit_btn').scrollIntoView({block:'center'})"
-            )
-            page.locator("#submit_btn").dispatch_event("click")
-            try:
-                page.wait_for_selector('[role="dialog"], .swal2-popup', timeout=5000)
-            except Exception:
-                pass
-
-            dialog_text = page.evaluate("""() => {
-                const d = document.querySelector('[role="dialog"], .swal2-popup');
-                return d ? d.textContent.trim() : null;
-            }""")
-            if dialog_text and "login" in dialog_text.lower():
-                needs_relogin = True
-            elif dialog_text and (
-                "not available for accepting solutions" in dialog_text
-                or "not available for submission" in dialog_text
-            ):
-                submit_error = "PRACTICE_FALLBACK"
-            elif dialog_text:
-                submit_error = dialog_text
-        except Exception as e:
-            submit_error = str(e)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=BROWSER_SESSION_TIMEOUT,
-            google_search=False,
-            cookies=saved_cookies if saved_cookies else [],
-        ) as session:
-            if not _retried and not _practice:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                session.fetch(f"{BASE_URL}/", page_action=check_login)
-
-            if not logged_in:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                session.fetch(f"{BASE_URL}/login", page_action=login_action)
-                if login_error:
-                    return SubmitResult(success=False, error=login_error)
-                logged_in = True
-
-            if not _practice:
-                print(json.dumps({"status": "submitting"}), flush=True)
-            submit_url = (
-                f"{BASE_URL}/submit/{problem_id}"
-                if contest_id == "PRACTICE"
-                else f"{BASE_URL}/{contest_id}/submit/{problem_id}"
-            )
-            session.fetch(submit_url, page_action=submit_action)
-
-            try:
-                browser_cookies = session.context.cookies()
-                if browser_cookies and logged_in:
-                    save_platform_cookies("codechef", browser_cookies)
-            except Exception:
-                pass
-
-        if needs_relogin and not _retried:
-            clear_platform_cookies("codechef")
-            return _submit_headless_codechef(
-                contest_id,
-                problem_id,
-                file_path,
-                language_id,
-                credentials,
-                _retried=True,
-            )
-
-        if submit_error == "PRACTICE_FALLBACK" and not _practice:
-            return _submit_headless_codechef(
-                "PRACTICE",
-                problem_id,
-                file_path,
-                language_id,
-                credentials,
-                _practice=True,
-            )
-
-        if submit_error:
-            return SubmitResult(success=False, error=submit_error)
-
-        return SubmitResult(success=True, error="", submission_id="")
-    except Exception as e:
-        return SubmitResult(success=False, error=str(e))
+def _fetch_html_sync(url: str) -> str:
+    response = Fetcher.get(url)
+    return str(response.body)
 
 
 class CodeChefScraper(BaseScraper):
@@ -300,19 +65,12 @@ class CodeChefScraper(BaseScraper):
                 data = await fetch_json(
                     client, API_CONTEST.format(contest_id=contest_id)
                 )
-            problems_raw = data.get("problems")
-            if not problems_raw and isinstance(data.get("child_contests"), dict):
-                for div in ("div_4", "div_3", "div_2", "div_1"):
-                    child = data["child_contests"].get(div, {})
-                    child_code = child.get("contest_code")
-                    if child_code:
-                        return await self.scrape_contest_metadata(child_code)
-            if not problems_raw:
+            if not data.get("problems"):
                 return self._metadata_error(
                     f"No problems found for contest {contest_id}"
                 )
             problems = []
-            for problem_code, problem_data in problems_raw.items():
+            for problem_code, problem_data in data["problems"].items():
                 if problem_data.get("category_name") == "main":
                     problems.append(
                         ProblemSummary(
@@ -325,120 +83,67 @@ class CodeChefScraper(BaseScraper):
                 error="",
                 contest_id=contest_id,
                 problems=problems,
-                url=f"{BASE_URL}/problems/%s",
-                contest_url=f"{BASE_URL}/{contest_id}",
-                standings_url=f"{BASE_URL}/{contest_id}/rankings",
+                url=f"{BASE_URL}/{contest_id}",
             )
         except Exception as e:
             return self._metadata_error(f"Failed to fetch contest {contest_id}: {e}")
 
     async def scrape_contest_list(self) -> ContestListResult:
-        async with httpx.AsyncClient(
-            limits=httpx.Limits(max_connections=CONNECTIONS)
-        ) as client:
+        async with httpx.AsyncClient() as client:
             try:
                 data = await fetch_json(client, API_CONTESTS_ALL)
             except httpx.HTTPStatusError as e:
                 return self._contests_error(f"Failed to fetch contests: {e}")
-
-            present = data.get("present_contests", [])
-            future = data.get("future_contests", [])
-
-            async def fetch_past_page(offset: int) -> list[dict[str, Any]]:
-                r = await client.get(
-                    BASE_URL + API_CONTESTS_PAST,
-                    params={
-                        "sort_by": "START",
-                        "sorting_order": "desc",
-                        "offset": offset,
-                    },
-                    headers=HEADERS,
-                    timeout=HTTP_TIMEOUT,
-                )
-                r.raise_for_status()
-                return r.json().get("contests", [])
-
-            past: list[dict[str, Any]] = []
-            offset = 0
-            while True:
-                page = await fetch_past_page(offset)
-                past.extend(
-                    c for c in page if re.match(r"^START\d+", c.get("contest_code", ""))
-                )
-                if len(page) < 20:
-                    break
-                offset += 20
-
-            raw: list[dict[str, Any]] = []
-            seen_raw: set[str] = set()
-            for c in present + future + past:
-                code = c.get("contest_code", "")
-                if not code or code in seen_raw:
-                    continue
-                seen_raw.add(code)
-                raw.append(c)
-
+            all_contests = data.get("future_contests", []) + data.get(
+                "past_contests", []
+            )
+            max_num = 0
+            for contest in all_contests:
+                contest_code = contest.get("contest_code", "")
+                if contest_code.startswith("START"):
+                    match = re.match(r"START(\d+)", contest_code)
+                    if match:
+                        num = int(match.group(1))
+                        max_num = max(max_num, num)
+            if max_num == 0:
+                return self._contests_error("No Starters contests found")
+            contests = []
             sem = asyncio.Semaphore(CONNECTIONS)
 
-            async def expand(c: dict[str, Any]) -> list[ContestSummary]:
-                code = c["contest_code"]
-                name = c.get("contest_name", code)
-                start_time: int | None = None
-                iso = c.get("contest_start_date_iso")
-                if iso:
+            async def fetch_divisions(i: int) -> list[ContestSummary]:
+                parent_id = f"START{i}"
+                async with sem:
                     try:
-                        start_time = int(datetime.fromisoformat(iso).timestamp())
-                    except Exception:
-                        pass
-                base_name = re.sub(r"\s*\(.*?\)\s*$", "", name).strip()
-                try:
-                    async with sem:
-                        detail = await fetch_json(
-                            client, API_CONTEST.format(contest_id=code)
+                        parent_data = await fetch_json(
+                            client, API_CONTEST.format(contest_id=parent_id)
                         )
-                    children = detail.get("child_contests")
-                    if children and isinstance(children, dict):
-                        divs: list[ContestSummary] = []
-                        for div_key in ("div_1", "div_2", "div_3", "div_4"):
-                            child = children.get(div_key)
-                            if not child:
-                                continue
-                            child_code = child.get("contest_code")
-                            div_num = child.get("div", {}).get(
-                                "div_number", div_key[-1]
+                    except Exception as e:
+                        import sys
+
+                        print(f"Error fetching {parent_id}: {e}", file=sys.stderr)
+                        return []
+                child_contests = parent_data.get("child_contests", {})
+                if not child_contests:
+                    return []
+                base_name = f"Starters {i}"
+                divisions = []
+                for div_key, div_data in child_contests.items():
+                    div_code = div_data.get("contest_code", "")
+                    div_num = div_data.get("div", {}).get("div_number", "")
+                    if div_code and div_num:
+                        divisions.append(
+                            ContestSummary(
+                                id=div_code,
+                                name=base_name,
+                                display_name=f"{base_name} (Div. {div_num})",
                             )
-                            if child_code:
-                                display = f"{base_name} (Div. {div_num})"
-                                divs.append(
-                                    ContestSummary(
-                                        id=child_code,
-                                        name=display,
-                                        display_name=display,
-                                        start_time=start_time,
-                                    )
-                                )
-                        if divs:
-                            return divs
-                except Exception:
-                    pass
-                return [
-                    ContestSummary(
-                        id=code, name=name, display_name=name, start_time=start_time
-                    )
-                ]
+                        )
+                return divisions
 
-            results = await asyncio.gather(*[expand(c) for c in raw])
-
-        contests: list[ContestSummary] = []
-        seen: set[str] = set()
-        for group in results:
-            for entry in group:
-                if entry.id not in seen:
-                    seen.add(entry.id)
-                    contests.append(entry)
-
-        if not contests:
-            return self._contests_error("No contests found")
+            tasks = [fetch_divisions(i) for i in range(1, max_num + 1)]
+            for coro in asyncio.as_completed(tasks):
+                divisions = await coro
+                contests.extend(divisions)
         return ContestListResult(success=True, error="", contests=contests)
 
     async def stream_tests_for_category_async(self, category_id: str) -> None:
@@ -458,15 +163,6 @@ class CodeChefScraper(BaseScraper):
                 )
                 return
             all_problems = contest_data.get("problems", {})
-            if not all_problems and isinstance(
-                contest_data.get("child_contests"), dict
-            ):
-                for div in ("div_4", "div_3", "div_2", "div_1"):
-                    child = contest_data["child_contests"].get(div, {})
-                    child_code = child.get("contest_code")
-                    if child_code:
-                        await self.stream_tests_for_category_async(child_code)
-                        return
             if not all_problems:
                 print(
                     json.dumps(
@@ -515,15 +211,18 @@ class CodeChefScraper(BaseScraper):
                         ]
                         time_limit_str = problem_data.get("max_timelimit", "1")
                         timeout_ms = int(float(time_limit_str) * 1000)
-                        memory_mb = 256.0
+                        problem_url = PROBLEM_URL.format(problem_id=problem_code)
+                        loop = asyncio.get_event_loop()
+                        html = await loop.run_in_executor(
+                            None, _fetch_html_sync, problem_url
+                        )
+                        memory_mb = _extract_memory_limit(html)
                         interactive = False
-                        precision = None
                     except Exception:
                         tests = []
                         timeout_ms = 1000
                         memory_mb = 256.0
                         interactive = False
-                        precision = None
                     combined_input = "\n".join(t.input for t in tests) if tests else ""
                     combined_expected = (
                         "\n".join(t.expected for t in tests) if tests else ""
@@ -541,7 +240,6 @@ class CodeChefScraper(BaseScraper):
                         "memory_mb": memory_mb,
                         "interactive": interactive,
                         "multi_test": False,
-                        "precision": precision,
                     }
 
             tasks = [run_one(problem_code) for problem_code in problems.keys()]
@@ -549,30 +247,6 @@ class CodeChefScraper(BaseScraper):
                 payload = await coro
                 print(json.dumps(payload), flush=True)
 
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        if not credentials.get("username") or not credentials.get("password"):
-            return self._submit_error("Missing credentials. Use :CP codechef login")
-        return await asyncio.to_thread(
-            _submit_headless_codechef,
-            contest_id,
-            problem_id,
-            file_path,
-            language_id,
-            credentials,
-        )
-
-    async def login(self, credentials: dict[str, str]) -> LoginResult:
-        if not credentials.get("username") or not credentials.get("password"):
-            return self._login_error("Missing username or password")
-        return await asyncio.to_thread(_login_headless_codechef, credentials)
-
 
 if __name__ == "__main__":
     CodeChefScraper().run_cli()

scrapers/codeforces.py

@@ -2,37 +2,30 @@
 
 import asyncio
 import json
+import logging
 import re
 from typing import Any
 
 import requests
 from bs4 import BeautifulSoup, Tag
+from scrapling.fetchers import Fetcher
 
-from .base import (
-    BaseScraper,
-    clear_platform_cookies,
-    extract_precision,
-    load_platform_cookies,
-    save_platform_cookies,
-)
+from .base import BaseScraper
 from .models import (
     ContestListResult,
     ContestSummary,
-    LoginResult,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
 )
-from .timeouts import (
-    BROWSER_NAV_TIMEOUT,
-    BROWSER_SESSION_TIMEOUT,
-    BROWSER_SUBMIT_NAV_TIMEOUT,
-    HTTP_TIMEOUT,
-)
+
+# suppress scrapling logging - https://github.com/D4Vinci/Scrapling/issues/31)
+logging.getLogger("scrapling").setLevel(logging.CRITICAL)
+
 
 BASE_URL = "https://codeforces.com"
 API_CONTEST_LIST_URL = f"{BASE_URL}/api/contest.list"
+TIMEOUT_SECONDS = 30
 HEADERS = {
     "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
 }
@@ -90,7 +83,7 @@ def _extract_title(block: Tag) -> tuple[str, str]:
 
 def _extract_samples(block: Tag) -> tuple[list[TestCase], bool]:
     st = block.find("div", class_="sample-test")
-    if not isinstance(st, Tag):
+    if not st:
         return [], False
 
     input_pres: list[Tag] = [
@@ -146,30 +139,11 @@ def _is_interactive(block: Tag) -> bool:
 
 
 def _fetch_problems_html(contest_id: str) -> str:
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        raise RuntimeError("scrapling is required for Codeforces metadata")
-
-    from .atcoder import _ensure_browser
-
-    _ensure_browser()
-
     url = f"{BASE_URL}/contest/{contest_id}/problems"
-    html = ""
-
-    def page_action(page):
-        nonlocal html
-        html = page.content()
-
-    with StealthySession(
-        headless=True,
-        timeout=BROWSER_SESSION_TIMEOUT,
-        google_search=False,
-    ) as session:
-        session.fetch(url, page_action=page_action, solve_cloudflare=True)
-
-    return html
+    page = Fetcher.get(
+        url,
+    )
+    return page.html_content
 
 
 def _parse_all_blocks(html: str) -> list[dict[str, Any]]:
@@ -185,7 +159,6 @@ def _parse_all_blocks(html: str) -> list[dict[str, Any]]:
         raw_samples, is_grouped = _extract_samples(b)
         timeout_ms, memory_mb = _extract_limits(b)
         interactive = _is_interactive(b)
-        precision = extract_precision(b.get_text(" ", strip=True))
 
         if is_grouped and raw_samples:
             combined_input = f"{len(raw_samples)}\n" + "\n".join(
@@ -212,7 +185,6 @@ def _parse_all_blocks(html: str) -> list[dict[str, Any]]:
                 "memory_mb": memory_mb,
                 "interactive": interactive,
                 "multi_test": is_grouped,
-                "precision": precision,
             }
         )
     return out
@@ -248,15 +220,13 @@ class CodeforcesScraper(BaseScraper):
                 contest_id=contest_id,
                 problems=problems,
                 url=f"https://codeforces.com/contest/{contest_id}/problem/%s",
-                contest_url=f"https://codeforces.com/contest/{contest_id}",
-                standings_url=f"https://codeforces.com/contest/{contest_id}/standings",
             )
         except Exception as e:
             return self._metadata_error(str(e))
 
     async def scrape_contest_list(self) -> ContestListResult:
         try:
-            r = requests.get(API_CONTEST_LIST_URL, timeout=HTTP_TIMEOUT)
+            r = requests.get(API_CONTEST_LIST_URL, timeout=TIMEOUT_SECONDS)
             r.raise_for_status()
             data = r.json()
             if data.get("status") != "OK":
@@ -264,20 +234,11 @@ class CodeforcesScraper(BaseScraper):
 
             contests: list[ContestSummary] = []
             for c in data["result"]:
-                phase = c.get("phase")
-                if phase not in ("FINISHED", "BEFORE", "CODING"):
+                if c.get("phase") != "FINISHED":
                     continue
                 cid = str(c["id"])
                 name = c["name"]
-                start_time = c.get("startTimeSeconds") if phase != "FINISHED" else None
-                contests.append(
-                    ContestSummary(
-                        id=cid,
-                        name=name,
-                        display_name=name,
-                        start_time=start_time,
-                    )
-                )
+                contests.append(ContestSummary(id=cid, name=name, display_name=name))
 
             if not contests:
                 return self._contests_error("No contests found")
@@ -308,288 +269,11 @@ class CodeforcesScraper(BaseScraper):
                         "memory_mb": b.get("memory_mb", 0),
                         "interactive": bool(b.get("interactive")),
                         "multi_test": bool(b.get("multi_test", False)),
-                        "precision": b.get("precision"),
                     }
                 ),
                 flush=True,
             )
 
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return await asyncio.to_thread(
-            _submit_headless,
-            contest_id,
-            problem_id,
-            file_path,
-            language_id,
-            credentials,
-        )
-
-    async def login(self, credentials: dict[str, str]) -> LoginResult:
-        if not credentials.get("username") or not credentials.get("password"):
-            return self._login_error("Missing username or password")
-        return await asyncio.to_thread(_login_headless_cf, credentials)
-
-
-def _cf_check_logged_in(page) -> bool:
-    return page.evaluate(
-        "() => Array.from(document.querySelectorAll('a'))"
-        ".some(a => a.textContent.includes('Logout'))"
-    )
-
-
-def _cf_login_action(credentials: dict[str, str]):
-    login_error: str | None = None
-
-    def login_action(page):
-        nonlocal login_error
-        try:
-            page.wait_for_selector('input[name="handleOrEmail"]', timeout=60000)
-            page.fill('input[name="handleOrEmail"]', credentials.get("username", ""))
-            page.fill('input[name="password"]', credentials.get("password", ""))
-            page.locator('#enterForm input[name="remember"]').check()
-            page.locator('#enterForm input[type="submit"]').click()
-            page.wait_for_function(
-                "() => !window.location.href.includes('/enter') || !!document.querySelector('#enterForm span.error')",
-                timeout=BROWSER_NAV_TIMEOUT,
-            )
-            if "/enter" in page.url:
-                login_error = "bad_credentials"
-                return
-        except Exception as e:
-            login_error = str(e)
-
-    return login_action, lambda: login_error
-
-
-def _login_headless_cf(credentials: dict[str, str]) -> LoginResult:
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return LoginResult(
-            success=False,
-            error="scrapling is required for Codeforces login",
-        )
-
-    from .atcoder import _ensure_browser
-
-    _ensure_browser()
-
-    saved_cookies = load_platform_cookies("codeforces") or []
-
-    if saved_cookies:
-        print(json.dumps({"status": "checking_login"}), flush=True)
-        logged_in = False
-
-        def check_action(page):
-            nonlocal logged_in
-            logged_in = _cf_check_logged_in(page)
-
-        try:
-            with StealthySession(
-                headless=True,
-                timeout=BROWSER_SESSION_TIMEOUT,
-                google_search=False,
-                cookies=saved_cookies,
-            ) as session:
-                session.fetch(
-                    f"{BASE_URL}/", page_action=check_action, solve_cloudflare=True
-                )
-            if logged_in:
-                return LoginResult(success=True, error="")
-        except Exception:
-            pass
-
-    login_action, get_error = _cf_login_action(credentials)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=BROWSER_SESSION_TIMEOUT,
-            google_search=False,
-        ) as session:
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            session.fetch(
-                f"{BASE_URL}/enter",
-                page_action=login_action,
-                solve_cloudflare=True,
-            )
-            login_error = get_error()
-            if login_error == "bad_credentials":
-                return LoginResult(success=False, error="bad_credentials")
-            elif login_error:
-                return LoginResult(success=False, error=f"Login failed: {login_error}")
-
-            logged_in = False
-
-            def verify_action(page):
-                nonlocal logged_in
-                logged_in = _cf_check_logged_in(page)
-
-            session.fetch(f"{BASE_URL}/", page_action=verify_action, network_idle=True)
-            if not logged_in:
-                return LoginResult(success=False, error="bad_credentials")
-
-            try:
-                browser_cookies = session.context.cookies()
-                if any(c.get("name") == "X-User-Sha1" for c in browser_cookies):
-                    save_platform_cookies("codeforces", browser_cookies)
-            except Exception:
-                pass
-
-        return LoginResult(success=True, error="")
-    except Exception as e:
-        return LoginResult(success=False, error=str(e))
-
-
-def _submit_headless(
-    contest_id: str,
-    problem_id: str,
-    file_path: str,
-    language_id: str,
-    credentials: dict[str, str],
-    _retried: bool = False,
-) -> SubmitResult:
-    from pathlib import Path
-
-    source_code = Path(file_path).read_text()
-
-    try:
-        from scrapling.fetchers import StealthySession  # type: ignore[import-untyped,unresolved-import]
-    except ImportError:
-        return SubmitResult(
-            success=False,
-            error="scrapling is required for Codeforces submit",
-        )
-
-    from .atcoder import _ensure_browser, _solve_turnstile
-
-    _ensure_browser()
-
-    saved_cookies: list[dict[str, Any]] = []
-    if not _retried:
-        saved_cookies = load_platform_cookies("codeforces") or []
-
-    logged_in = bool(saved_cookies)
-    submit_error: str | None = None
-    needs_relogin = False
-
-    def check_login(page):
-        nonlocal logged_in
-        logged_in = _cf_check_logged_in(page)
-
-    _login_action, _get_login_error = _cf_login_action(credentials)
-
-    def submit_action(page):
-        nonlocal submit_error, needs_relogin
-        if "/enter" in page.url or "/login" in page.url:
-            needs_relogin = True
-            return
-        _solve_turnstile(page)
-        try:
-            page.select_option(
-                'select[name="submittedProblemIndex"]',
-                problem_id.upper(),
-            )
-            page.select_option('select[name="programTypeId"]', language_id)
-            page.evaluate(
-                """(code) => {
-                    const cm = document.querySelector('.CodeMirror');
-                    if (cm && cm.CodeMirror) {
-                        cm.CodeMirror.setValue(code);
-                    }
-                    const ta = document.querySelector('textarea[name="source"]');
-                    if (ta) ta.value = code;
-                }""",
-                source_code,
-            )
-            page.locator("form.submit-form input.submit").click(no_wait_after=True)
-            try:
-                page.wait_for_url(
-                    lambda url: "/my" in url or "/status" in url,
-                    timeout=BROWSER_SUBMIT_NAV_TIMEOUT["codeforces"],
-                )
-            except Exception:
-                err_el = page.query_selector("span.error")
-                if err_el:
-                    submit_error = err_el.inner_text().strip()
-                else:
-                    submit_error = "Submit failed: page did not navigate"
-        except Exception as e:
-            submit_error = str(e)
-
-    try:
-        with StealthySession(
-            headless=True,
-            timeout=BROWSER_SESSION_TIMEOUT,
-            google_search=False,
-            cookies=saved_cookies if saved_cookies else [],
-        ) as session:
-            if not _retried and saved_cookies:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                session.fetch(
-                    f"{BASE_URL}/", page_action=check_login, solve_cloudflare=True
-                )
-
-            if not logged_in:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                session.fetch(
-                    f"{BASE_URL}/enter",
-                    page_action=_login_action,
-                    solve_cloudflare=True,
-                )
-                login_error = _get_login_error()
-                if login_error == "bad_credentials":
-                    return SubmitResult(success=False, error="bad_credentials")
-                elif login_error:
-                    return SubmitResult(
-                        success=False, error=f"Login failed: {login_error}"
-                    )
-                logged_in = True
-
-            print(json.dumps({"status": "submitting"}), flush=True)
-            session.fetch(
-                f"{BASE_URL}/contest/{contest_id}/submit",
-                page_action=submit_action,
-                solve_cloudflare=False,
-            )
-
-            try:
-                browser_cookies = session.context.cookies()
-                if any(c.get("name") == "X-User-Sha1" for c in browser_cookies):
-                    save_platform_cookies("codeforces", browser_cookies)
-            except Exception:
-                pass
-
-        if needs_relogin and not _retried:
-            clear_platform_cookies("codeforces")
-            return _submit_headless(
-                contest_id,
-                problem_id,
-                file_path,
-                language_id,
-                credentials,
-                _retried=True,
-            )
-
-        if submit_error:
-            return SubmitResult(success=False, error=submit_error)
-
-        return SubmitResult(
-            success=True,
-            error="",
-            submission_id="",
-            verdict="submitted",
-        )
-    except Exception as e:
-        return SubmitResult(success=False, error=str(e))
-
 
 if __name__ == "__main__":
     CodeforcesScraper().run_cli()

scrapers/cses.py

@@ -1,51 +1,30 @@
 #!/usr/bin/env python3
 
 import asyncio
-import base64
 import json
 import re
 from typing import Any
 
 import httpx
 
-from .base import BaseScraper, extract_precision, load_platform_cookies, save_platform_cookies
-from .timeouts import HTTP_TIMEOUT
+from .base import BaseScraper
 from .models import (
     ContestListResult,
     ContestSummary,
-    LoginResult,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
 )
 
 BASE_URL = "https://cses.fi"
-API_URL = "https://cses.fi/api"
-SUBMIT_SCOPE = "courses/problemset"
 INDEX_PATH = "/problemset"
 TASK_PATH = "/problemset/task/{id}"
 HEADERS = {
     "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
 }
+TIMEOUT_S = 15.0
 CONNECTIONS = 8
 
-CSES_LANGUAGES: dict[str, dict[str, str]] = {
-    "C++17": {"name": "C++", "option": "C++17"},
-    "Python3": {"name": "Python3", "option": "CPython3"},
-    "PyPy3": {"name": "Python3", "option": "PyPy3"},
-    "Java": {"name": "Java", "option": "Java"},
-    "Rust2021": {"name": "Rust", "option": "2021"},
-}
-
-EXTENSIONS: dict[str, str] = {
-    "C++17": "cpp",
-    "Python3": "py",
-    "PyPy3": "py",
-    "Java": "java",
-    "Rust2021": "rs",
-}
-
 
 def normalize_category_name(category_name: str) -> str:
     return category_name.lower().replace(" ", "_").replace("&", "and")
@@ -85,7 +64,7 @@ def snake_to_title(name: str) -> str:
 
 
 async def fetch_text(client: httpx.AsyncClient, path: str) -> str:
-    r = await client.get(BASE_URL + path, headers=HEADERS, timeout=HTTP_TIMEOUT)
+    r = await client.get(BASE_URL + path, headers=HEADERS, timeout=TIMEOUT_S)
     r.raise_for_status()
     return r.text
 
@@ -150,21 +129,17 @@ def parse_category_problems(category_id: str, html: str) -> list[ProblemSummary]
     return []
 
 
-def _extract_problem_info(html: str) -> tuple[int, int, bool, float | None]:
+def _extract_problem_info(html: str) -> tuple[int, int, bool]:
     tm = TIME_RE.search(html)
     mm = MEM_RE.search(html)
     t = int(round(float(tm.group(1)) * 1000)) if tm else 0
     m = int(mm.group(1)) if mm else 0
     md = MD_BLOCK_RE.search(html)
     interactive = False
-    precision = None
     if md:
         body = md.group(1)
         interactive = "This is an interactive problem." in body
-        from bs4 import BeautifulSoup
-
-        precision = extract_precision(BeautifulSoup(body, "html.parser").get_text(" "))
-    return t, m, interactive, precision
+    return t, m, interactive
 
 
 def parse_title(html: str) -> str:
@@ -224,8 +199,6 @@ class CSESScraper(BaseScraper):
             contest_id=contest_id,
             problems=problems,
             url="https://cses.fi/problemset/task/%s",
-            contest_url="https://cses.fi/problemset",
-            standings_url="",
         )
 
     async def scrape_contest_list(self) -> ContestListResult:
@@ -234,34 +207,9 @@ class CSESScraper(BaseScraper):
         cats = parse_categories(html)
         if not cats:
             return ContestListResult(
-                success=False,
-                error=f"{self.platform_name}: No contests found",
-                supports_countdown=False,
+                success=False, error=f"{self.platform_name}: No contests found"
             )
-        return ContestListResult(
-            success=True, error="", contests=cats, supports_countdown=False
-        )
-
-    async def login(self, credentials: dict[str, str]) -> LoginResult:
-        username = credentials.get("username", "")
-        password = credentials.get("password", "")
-        if not username or not password:
-            return self._login_error("Missing username or password")
-
-        token = load_platform_cookies("cses")
-        async with httpx.AsyncClient(follow_redirects=True) as client:
-            if token:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                if await self._check_token(client, token):
-                    return LoginResult(success=True, error="")
-
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            token = await self._web_login(client, username, password)
-            if not token:
-                return self._login_error("bad_credentials")
-
-            save_platform_cookies("cses", token)
-            return LoginResult(success=True, error="")
+        return ContestListResult(success=True, error="", contests=cats)
 
     async def stream_tests_for_category_async(self, category_id: str) -> None:
         async with httpx.AsyncClient(
@@ -279,17 +227,10 @@ class CSESScraper(BaseScraper):
                     try:
                         html = await fetch_text(client, task_path(pid))
                         tests = parse_tests(html)
-                        timeout_ms, memory_mb, interactive, precision = (
-                            _extract_problem_info(html)
-                        )
+                        timeout_ms, memory_mb, interactive = _extract_problem_info(html)
                     except Exception:
                         tests = []
-                        timeout_ms, memory_mb, interactive, precision = (
-                            0,
-                            0,
-                            False,
-                            None,
-                        )
+                        timeout_ms, memory_mb, interactive = 0, 0, False
 
                     combined_input = "\n".join(t.input for t in tests) if tests else ""
                     combined_expected = (
@@ -309,7 +250,6 @@ class CSESScraper(BaseScraper):
                         "memory_mb": memory_mb,
                         "interactive": interactive,
                         "multi_test": False,
-                        "precision": precision,
                     }
 
             tasks = [run_one(p.id) for p in problems]
@@ -317,146 +257,6 @@ class CSESScraper(BaseScraper):
                 payload = await coro
                 print(json.dumps(payload), flush=True)
 
-    async def _web_login(
-        self,
-        client: httpx.AsyncClient,
-        username: str,
-        password: str,
-    ) -> str | None:
-        login_page = await client.get(
-            f"{BASE_URL}/login", headers=HEADERS, timeout=HTTP_TIMEOUT
-        )
-        csrf_match = re.search(r'name="csrf_token" value="([^"]+)"', login_page.text)
-        if not csrf_match:
-            return None
-
-        login_resp = await client.post(
-            f"{BASE_URL}/login",
-            data={
-                "csrf_token": csrf_match.group(1),
-                "nick": username,
-                "pass": password,
-            },
-            headers=HEADERS,
-            timeout=HTTP_TIMEOUT,
-        )
-
-        if "Invalid username or password" in login_resp.text:
-            return None
-
-        api_resp = await client.post(
-            f"{API_URL}/login", headers=HEADERS, timeout=HTTP_TIMEOUT
-        )
-        api_data = api_resp.json()
-        token: str | None = api_data.get("X-Auth-Token")
-        auth_url: str | None = api_data.get("authentication_url")
-        if not token:
-            raise RuntimeError("CSES API login response missing 'X-Auth-Token'")
-        if not auth_url:
-            raise RuntimeError("CSES API login response missing 'authentication_url'")
-
-        auth_page = await client.get(auth_url, headers=HEADERS, timeout=HTTP_TIMEOUT)
-        auth_csrf = re.search(r'name="csrf_token" value="([^"]+)"', auth_page.text)
-        form_token = re.search(r'name="token" value="([^"]+)"', auth_page.text)
-        if not auth_csrf or not form_token:
-            return None
-
-        await client.post(
-            auth_url,
-            data={
-                "csrf_token": auth_csrf.group(1),
-                "token": form_token.group(1),
-            },
-            headers=HEADERS,
-            timeout=HTTP_TIMEOUT,
-        )
-
-        check = await client.get(
-            f"{API_URL}/login",
-            headers={"X-Auth-Token": token, **HEADERS},
-            timeout=HTTP_TIMEOUT,
-        )
-        if check.status_code != 200:
-            return None
-        return token
-
-    async def _check_token(self, client: httpx.AsyncClient, token: str) -> bool:
-        try:
-            r = await client.get(
-                f"{API_URL}/login",
-                headers={"X-Auth-Token": token, **HEADERS},
-                timeout=HTTP_TIMEOUT,
-            )
-            return r.status_code == 200
-        except (httpx.ConnectError, httpx.TimeoutException, httpx.NetworkError):
-            raise
-
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        from pathlib import Path
-
-        source_code = Path(file_path).read_text()
-        username = credentials.get("username", "")
-        password = credentials.get("password", "")
-        if not username or not password:
-            return self._submit_error("Missing credentials. Use :CP login cses")
-
-        async with httpx.AsyncClient(follow_redirects=True) as client:
-            token = load_platform_cookies("cses")
-
-            if token:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                if not await self._check_token(client, token):
-                    token = None
-
-            if not token:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                token = await self._web_login(client, username, password)
-                if not token:
-                    return self._submit_error("bad_credentials")
-                save_platform_cookies("cses", token)
-
-            print(json.dumps({"status": "submitting"}), flush=True)
-
-            ext = EXTENSIONS.get(language_id, "cpp")
-            lang = CSES_LANGUAGES.get(language_id, {"name": "C++", "option": "C++17"})
-            content_b64 = base64.b64encode(source_code.encode()).decode()
-
-            payload: dict[str, Any] = {
-                "language": lang,
-                "filename": f"{problem_id}.{ext}",
-                "content": content_b64,
-            }
-
-            r = await client.post(
-                f"{API_URL}/{SUBMIT_SCOPE}/submissions",
-                json=payload,
-                params={"task": problem_id},
-                headers={
-                    "X-Auth-Token": token,
-                    "Content-Type": "application/json",
-                    **HEADERS,
-                },
-                timeout=HTTP_TIMEOUT,
-            )
-
-            if r.status_code not in range(200, 300):
-                try:
-                    body = r.json()
-                    err = body.get("error") or body.get("message") or r.text
-                except Exception:
-                    err = r.text
-                return self._submit_error(f"Submit request failed: {err}")
-
-            submission_id = str(r.json().get("id", ""))
-            return SubmitResult(success=True, error="", submission_id=submission_id)
-
 
 if __name__ == "__main__":
     CSESScraper().run_cli()

scrapers/kattis.py

@@ -1,432 +0,0 @@
-#!/usr/bin/env python3
-
-import asyncio
-import io
-import json
-import re
-import zipfile
-from datetime import datetime
-from pathlib import Path
-
-import httpx
-
-from .base import (
-    BaseScraper,
-    clear_platform_cookies,
-    extract_precision,
-    load_platform_cookies,
-    save_platform_cookies,
-)
-from .timeouts import HTTP_TIMEOUT
-from .models import (
-    ContestListResult,
-    ContestSummary,
-    LoginResult,
-    MetadataResult,
-    ProblemSummary,
-    SubmitResult,
-    TestCase,
-)
-
-BASE_URL = "https://open.kattis.com"
-HEADERS = {
-    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
-}
-CONNECTIONS = 8
-
-TIME_RE = re.compile(
-    r"CPU Time limit</span>\s*<span[^>]*>\s*(\d+)\s*seconds?\s*</span>",
-    re.DOTALL,
-)
-MEM_RE = re.compile(
-    r"Memory limit</span>\s*<span[^>]*>\s*(\d+)\s*MB\s*</span>",
-    re.DOTALL,
-)
-
-
-async def _fetch_text(client: httpx.AsyncClient, url: str) -> str:
-    r = await client.get(url, headers=HEADERS, timeout=HTTP_TIMEOUT)
-    r.raise_for_status()
-    return r.text
-
-
-async def _fetch_bytes(client: httpx.AsyncClient, url: str) -> bytes:
-    r = await client.get(url, headers=HEADERS, timeout=HTTP_TIMEOUT)
-    r.raise_for_status()
-    return r.content
-
-
-def _parse_limits(html: str) -> tuple[int, int]:
-    tm = TIME_RE.search(html)
-    mm = MEM_RE.search(html)
-    timeout_ms = int(tm.group(1)) * 1000 if tm else 1000
-    memory_mb = int(mm.group(1)) if mm else 1024
-    return timeout_ms, memory_mb
-
-
-def _parse_samples_html(html: str) -> list[TestCase]:
-    tests: list[TestCase] = []
-    tables = re.finditer(r'<table\s+class="sample"[^>]*>.*?</table>', html, re.DOTALL)
-    for table_match in tables:
-        table_html = table_match.group(0)
-        pres = re.findall(r"<pre>(.*?)</pre>", table_html, re.DOTALL)
-        if len(pres) >= 2:
-            inp = pres[0].strip()
-            out = pres[1].strip()
-            tests.append(TestCase(input=inp, expected=out))
-    return tests
-
-
-def _parse_samples_zip(data: bytes) -> list[TestCase]:
-    try:
-        zf = zipfile.ZipFile(io.BytesIO(data))
-    except zipfile.BadZipFile:
-        return []
-    inputs: dict[str, str] = {}
-    outputs: dict[str, str] = {}
-    for name in zf.namelist():
-        content = zf.read(name).decode("utf-8").strip()
-        if name.endswith(".in"):
-            key = name[: -len(".in")]
-            inputs[key] = content
-        elif name.endswith(".ans"):
-            key = name[: -len(".ans")]
-            outputs[key] = content
-    tests: list[TestCase] = []
-    for key in sorted(set(inputs) & set(outputs)):
-        tests.append(TestCase(input=inputs[key], expected=outputs[key]))
-    return tests
-
-
-def _is_interactive(html: str) -> bool:
-    return "This is an interactive problem" in html
-
-
-def _parse_contests_page(html: str) -> list[ContestSummary]:
-    results: list[ContestSummary] = []
-    seen: set[str] = set()
-    for row_m in re.finditer(r"<tr[^>]*>(.*?)</tr>", html, re.DOTALL):
-        row = row_m.group(1)
-        link_m = re.search(r'href="/contests/([a-z0-9]+)"[^>]*>([^<]+)</a>', row)
-        if not link_m:
-            continue
-        cid = link_m.group(1)
-        name = link_m.group(2).strip()
-        if cid in seen:
-            continue
-        seen.add(cid)
-        start_time: int | None = None
-        ts_m = re.search(r'data-timestamp="(\d+)"', row)
-        if ts_m:
-            start_time = int(ts_m.group(1))
-        else:
-            time_m = re.search(r'<time[^>]+datetime="([^"]+)"', row)
-            if time_m:
-                try:
-                    dt = datetime.fromisoformat(time_m.group(1).replace("Z", "+00:00"))
-                    start_time = int(dt.timestamp())
-                except Exception:
-                    pass
-        results.append(
-            ContestSummary(id=cid, name=name, display_name=name, start_time=start_time)
-        )
-    return results
-
-
-def _parse_contest_problem_list(html: str) -> list[tuple[str, str]]:
-    if "The problems will become available when the contest starts" in html:
-        return []
-    results: list[tuple[str, str]] = []
-    seen: set[str] = set()
-    for row_m in re.finditer(r"<tr[^>]*>(.*?)</tr>", html, re.DOTALL):
-        row = row_m.group(1)
-        link_m = re.search(
-            r'href="/contests/[^/]+/problems/([^"]+)"[^>]*>([^<]+)</a>', row
-        )
-        if not link_m:
-            continue
-        slug = link_m.group(1)
-        name = link_m.group(2).strip()
-        if slug in seen:
-            continue
-        seen.add(slug)
-        label_m = re.search(r"<td[^>]*>\s*([A-Z])\s*</td>", row)
-        label = label_m.group(1) if label_m else ""
-        display = f"{label} - {name}" if label else name
-        results.append((slug, display))
-    return results
-
-
-async def _fetch_contest_slugs(
-    client: httpx.AsyncClient, contest_id: str
-) -> list[tuple[str, str]]:
-    try:
-        html = await _fetch_text(client, f"{BASE_URL}/contests/{contest_id}/problems")
-        return _parse_contest_problem_list(html)
-    except httpx.HTTPStatusError:
-        return []
-    except Exception:
-        return []
-
-
-async def _stream_single_problem(client: httpx.AsyncClient, slug: str) -> None:
-    try:
-        html = await _fetch_text(client, f"{BASE_URL}/problems/{slug}")
-    except Exception:
-        return
-
-    timeout_ms, memory_mb = _parse_limits(html)
-    interactive = _is_interactive(html)
-    precision = extract_precision(html)
-
-    tests: list[TestCase] = []
-    try:
-        zip_data = await _fetch_bytes(
-            client,
-            f"{BASE_URL}/problems/{slug}/file/statement/samples.zip",
-        )
-        tests = _parse_samples_zip(zip_data)
-    except Exception:
-        tests = _parse_samples_html(html)
-
-    combined_input = "\n".join(t.input for t in tests) if tests else ""
-    combined_expected = "\n".join(t.expected for t in tests) if tests else ""
-
-    print(
-        json.dumps(
-            {
-                "problem_id": slug,
-                "combined": {
-                    "input": combined_input,
-                    "expected": combined_expected,
-                },
-                "tests": [{"input": t.input, "expected": t.expected} for t in tests],
-                "timeout_ms": timeout_ms,
-                "memory_mb": memory_mb,
-                "interactive": interactive,
-                "multi_test": False,
-                "precision": precision,
-            }
-        ),
-        flush=True,
-    )
-
-
-async def _load_kattis_cookies(client: httpx.AsyncClient) -> None:
-    data = load_platform_cookies("kattis")
-    if isinstance(data, dict):
-        for k, v in data.items():
-            client.cookies.set(k, v)
-
-
-async def _save_kattis_cookies(client: httpx.AsyncClient) -> None:
-    cookies = dict(client.cookies.items())
-    if cookies:
-        save_platform_cookies("kattis", cookies)
-
-
-async def _check_kattis_login(client: httpx.AsyncClient) -> bool:
-    try:
-        r = await client.get(BASE_URL, headers=HEADERS, timeout=HTTP_TIMEOUT)
-        return bool(r.headers.get("x-username"))
-    except Exception:
-        return False
-
-
-async def _do_kattis_login(
-    client: httpx.AsyncClient, username: str, password: str
-) -> bool:
-    client.cookies.clear()
-    r = await client.post(
-        f"{BASE_URL}/login",
-        data={"user": username, "password": password, "script": "true"},
-        headers=HEADERS,
-        timeout=HTTP_TIMEOUT,
-    )
-    return r.status_code == 200
-
-
-class KattisScraper(BaseScraper):
-    @property
-    def platform_name(self) -> str:
-        return "kattis"
-
-    async def scrape_contest_metadata(self, contest_id: str) -> MetadataResult:
-        try:
-            async with httpx.AsyncClient() as client:
-                slugs = await _fetch_contest_slugs(client, contest_id)
-                if slugs:
-                    return MetadataResult(
-                        success=True,
-                        error="",
-                        contest_id=contest_id,
-                        problems=[
-                            ProblemSummary(id=slug, name=name) for slug, name in slugs
-                        ],
-                        url=f"{BASE_URL}/problems/%s",
-                        contest_url=f"{BASE_URL}/contests/{contest_id}",
-                        standings_url=f"{BASE_URL}/contests/{contest_id}/standings",
-                    )
-                try:
-                    html = await _fetch_text(
-                        client, f"{BASE_URL}/problems/{contest_id}"
-                    )
-                except Exception as e:
-                    return self._metadata_error(str(e))
-                title_m = re.search(r"<title>([^<]+)</title>", html)
-                name = (
-                    title_m.group(1).split("\u2013")[0].strip()
-                    if title_m
-                    else contest_id
-                )
-                return MetadataResult(
-                    success=True,
-                    error="",
-                    contest_id=contest_id,
-                    problems=[ProblemSummary(id=contest_id, name=name)],
-                    url=f"{BASE_URL}/problems/%s",
-                    contest_url=f"{BASE_URL}/problems/{contest_id}",
-                    standings_url="",
-                )
-        except Exception as e:
-            return self._metadata_error(str(e))
-
-    async def scrape_contest_list(self) -> ContestListResult:
-        try:
-            async with httpx.AsyncClient() as client:
-                html = await _fetch_text(
-                    client,
-                    f"{BASE_URL}/contests?kattis_original=on&kattis_recycled=off&user_created=off",
-                )
-            contests = _parse_contests_page(html)
-            if not contests:
-                return self._contests_error("No contests found")
-            return ContestListResult(success=True, error="", contests=contests)
-        except Exception as e:
-            return self._contests_error(str(e))
-
-    async def stream_tests_for_category_async(self, category_id: str) -> None:
-        async with httpx.AsyncClient(
-            limits=httpx.Limits(max_connections=CONNECTIONS)
-        ) as client:
-            slugs = await _fetch_contest_slugs(client, category_id)
-            if slugs:
-                sem = asyncio.Semaphore(CONNECTIONS)
-
-                async def emit_one(slug: str, _name: str) -> None:
-                    async with sem:
-                        await _stream_single_problem(client, slug)
-
-                await asyncio.gather(*(emit_one(s, n) for s, n in slugs))
-                return
-
-            await _stream_single_problem(client, category_id)
-
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        source = Path(file_path).read_bytes()
-        username = credentials.get("username", "")
-        password = credentials.get("password", "")
-        if not username or not password:
-            return self._submit_error("Missing credentials. Use :CP kattis login")
-
-        async with httpx.AsyncClient(follow_redirects=True) as client:
-            await _load_kattis_cookies(client)
-            if client.cookies:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-            else:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                ok = await _do_kattis_login(client, username, password)
-                if not ok:
-                    return self._submit_error("bad_credentials")
-                await _save_kattis_cookies(client)
-
-            print(json.dumps({"status": "submitting"}), flush=True)
-            lang_lower = language_id.lower()
-            mainclass = Path(file_path).stem if "java" in lang_lower else ""
-            data: dict[str, str] = {
-                "submit": "true",
-                "script": "true",
-                "language": language_id,
-                "problem": problem_id,
-                "mainclass": mainclass,
-                "submit_ctr": "2",
-            }
-            if contest_id != problem_id:
-                data["contest"] = contest_id
-
-            async def _do_submit() -> httpx.Response:
-                return await client.post(
-                    f"{BASE_URL}/submit",
-                    data=data,
-                    files={"sub_file[]": (Path(file_path).name, source, "text/plain")},
-                    headers=HEADERS,
-                    timeout=HTTP_TIMEOUT,
-                )
-
-            try:
-                r = await _do_submit()
-                r.raise_for_status()
-            except Exception as e:
-                return self._submit_error(f"Submit request failed: {e}")
-
-            if r.status_code in (400, 403) or r.text == "Request validation failed":
-                clear_platform_cookies("kattis")
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                ok = await _do_kattis_login(client, username, password)
-                if not ok:
-                    return self._submit_error("bad_credentials")
-                await _save_kattis_cookies(client)
-                try:
-                    r = await _do_submit()
-                    r.raise_for_status()
-                except Exception as e:
-                    return self._submit_error(f"Submit request failed: {e}")
-
-            sid_m = re.search(r"Submission ID:\s*(\d+)", r.text, re.IGNORECASE)
-            if not sid_m:
-                return self._submit_error(
-                    r.text.strip() or "Submit failed (no submission ID)"
-                )
-            return SubmitResult(
-                success=True,
-                error="",
-                submission_id=sid_m.group(1),
-                verdict="submitted",
-            )
-
-    async def login(self, credentials: dict[str, str]) -> LoginResult:
-        username = credentials.get("username", "")
-        password = credentials.get("password", "")
-        if not username or not password:
-            return self._login_error("Missing username or password")
-
-        async with httpx.AsyncClient(follow_redirects=True) as client:
-            await _load_kattis_cookies(client)
-            if client.cookies:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                if await _check_kattis_login(client):
-                    return LoginResult(
-                        success=True,
-                        error="",
-                    )
-
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            ok = await _do_kattis_login(client, username, password)
-            if not ok:
-                return self._login_error("bad_credentials")
-            await _save_kattis_cookies(client)
-        return LoginResult(
-            success=True,
-            error="",
-        )
-
-
-if __name__ == "__main__":
-    KattisScraper().run_cli()

scrapers/language_ids.py

@@ -1,146 +0,0 @@
-LANGUAGE_IDS = {
-    "atcoder": {
-        "cpp": "6017",
-        "python": "6082",
-        "java": "6056",
-        "rust": "6088",
-        "c": "6014",
-        "go": "6051",
-        "haskell": "6052",
-        "csharp": "6015",
-        "kotlin": "6062",
-        "ruby": "6087",
-        "javascript": "6059",
-        "typescript": "6100",
-        "scala": "6090",
-        "ocaml": "6073",
-        "dart": "6033",
-        "elixir": "6038",
-        "erlang": "6041",
-        "fsharp": "6042",
-        "swift": "6095",
-        "zig": "6111",
-        "nim": "6072",
-        "lua": "6067",
-        "perl": "6076",
-        "php": "6077",
-        "pascal": "6075",
-        "crystal": "6028",
-        "d": "6030",
-        "julia": "6114",
-        "r": "6084",
-        "commonlisp": "6027",
-        "scheme": "6092",
-        "clojure": "6022",
-        "ada": "6002",
-        "bash": "6008",
-        "fortran": "6047",
-        "gleam": "6049",
-        "lean": "6065",
-        "vala": "6106",
-        "v": "6105",
-    },
-    "codeforces": {
-        "cpp": "89",
-        "python": "70",
-        "java": "87",
-        "kotlin": "99",
-        "rust": "75",
-        "go": "32",
-        "csharp": "96",
-        "haskell": "12",
-        "javascript": "55",
-        "ruby": "67",
-        "scala": "20",
-        "ocaml": "19",
-        "d": "28",
-        "perl": "13",
-        "php": "6",
-        "pascal": "4",
-        "fsharp": "97",
-    },
-    "cses": {
-        "cpp": "C++17",
-        "python": "Python3",
-        "java": "Java",
-        "rust": "Rust2021",
-    },
-    "usaco": {
-        "cpp": "cpp",
-        "python": "python",
-        "java": "java",
-    },
-    "kattis": {
-        "cpp": "C++",
-        "python": "Python 3",
-        "java": "Java",
-        "rust": "Rust",
-        "ada": "Ada",
-        "algol60": "Algol 60",
-        "algol68": "Algol 68",
-        "apl": "APL",
-        "bash": "Bash",
-        "bcpl": "BCPL",
-        "bqn": "BQN",
-        "c": "C",
-        "cobol": "COBOL",
-        "commonlisp": "Common Lisp",
-        "crystal": "Crystal",
-        "csharp": "C#",
-        "d": "D",
-        "dart": "Dart",
-        "elixir": "Elixir",
-        "erlang": "Erlang",
-        "forth": "Forth",
-        "fortran": "Fortran",
-        "fortran77": "Fortran 77",
-        "fsharp": "F#",
-        "gerbil": "Gerbil",
-        "go": "Go",
-        "haskell": "Haskell",
-        "icon": "Icon",
-        "javascript": "JavaScript (Node.js)",
-        "julia": "Julia",
-        "kotlin": "Kotlin",
-        "lua": "Lua",
-        "modula2": "Modula-2",
-        "nim": "Nim",
-        "objectivec": "Objective-C",
-        "ocaml": "OCaml",
-        "octave": "Octave",
-        "odin": "Odin",
-        "pascal": "Pascal",
-        "perl": "Perl",
-        "php": "PHP",
-        "pli": "PL/I",
-        "prolog": "Prolog",
-        "racket": "Racket",
-        "ruby": "Ruby",
-        "scala": "Scala",
-        "simula": "Simula 67",
-        "smalltalk": "Smalltalk",
-        "snobol": "SNOBOL",
-        "swift": "Swift",
-        "typescript": "TypeScript",
-        "visualbasic": "Visual Basic",
-        "zig": "Zig",
-    },
-    "codechef": {
-        "cpp": "C++",
-        "python": "PYTH 3",
-        "java": "JAVA",
-        "rust": "rust",
-        "c": "C",
-        "go": "GO",
-        "kotlin": "KTLN",
-        "javascript": "NODEJS",
-        "typescript": "TS",
-        "csharp": "C#",
-        "php": "PHP",
-        "r": "R",
-    },
-}
-
-
-def get_language_id(platform: str, language: str) -> str | None:
-    return LANGUAGE_IDS.get(platform, {}).get(language)

scrapers/models.py

@@ -26,7 +26,6 @@ class ContestSummary(BaseModel):
     id: str
     name: str
     display_name: str | None = None
-    start_time: int | None = None
 
     model_config = ConfigDict(extra="forbid")
 
@@ -42,15 +41,12 @@ class MetadataResult(ScrapingResult):
     contest_id: str = ""
     problems: list[ProblemSummary] = Field(default_factory=list)
     url: str
-    contest_url: str = ""
-    standings_url: str = ""
 
     model_config = ConfigDict(extra="forbid")
 
 
 class ContestListResult(ScrapingResult):
     contests: list[ContestSummary] = Field(default_factory=list)
-    supports_countdown: bool = True
 
     model_config = ConfigDict(extra="forbid")
 
@@ -67,19 +63,6 @@ class TestsResult(ScrapingResult):
     model_config = ConfigDict(extra="forbid")
 
 
-class LoginResult(ScrapingResult):
-    credentials: dict[str, str] = Field(default_factory=dict)
-
-    model_config = ConfigDict(extra="forbid")
-
-
-class SubmitResult(ScrapingResult):
-    submission_id: str = ""
-    verdict: str = ""
-
-    model_config = ConfigDict(extra="forbid")
-
-
 class ScraperConfig(BaseModel):
     timeout_seconds: int = 30
     max_retries: int = 3

scrapers/timeouts.py

@@ -1,13 +0,0 @@
-from collections import defaultdict
-
-HTTP_TIMEOUT = 15.0
-
-BROWSER_SESSION_TIMEOUT = 15000
-BROWSER_NAV_TIMEOUT = 10000
-BROWSER_SUBMIT_NAV_TIMEOUT: defaultdict[str, int] = defaultdict(
-    lambda: BROWSER_NAV_TIMEOUT
-)
-BROWSER_SUBMIT_NAV_TIMEOUT["atcoder"] = BROWSER_NAV_TIMEOUT * 2
-BROWSER_SUBMIT_NAV_TIMEOUT["codeforces"] = BROWSER_NAV_TIMEOUT * 2
-BROWSER_TURNSTILE_POLL = 5000
-BROWSER_ELEMENT_WAIT = 10000

scrapers/usaco.py

@@ -1,555 +0,0 @@
-#!/usr/bin/env python3
-
-import asyncio
-import json
-import re
-from pathlib import Path
-from typing import Any, cast
-
-import httpx
-
-from .base import (
-    BaseScraper,
-    extract_precision,
-    load_platform_cookies,
-    save_platform_cookies,
-)
-from .timeouts import HTTP_TIMEOUT
-from .models import (
-    ContestListResult,
-    ContestSummary,
-    LoginResult,
-    MetadataResult,
-    ProblemSummary,
-    SubmitResult,
-    TestCase,
-)
-
-BASE_URL = "http://www.usaco.org"
-_AUTH_BASE = "https://usaco.org"
-HEADERS = {
-    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
-}
-CONNECTIONS = 4
-
-_LOGIN_PATH = "/current/tpcm/login-session.php"
-_SUBMIT_PATH = "/current/tpcm/submit-solution.php"
-
-_LANG_KEYWORDS: dict[str, list[str]] = {
-    "cpp": ["c++17", "c++ 17", "g++17", "c++", "cpp"],
-    "python": ["python3", "python 3", "python"],
-    "java": ["java"],
-}
-
-MONTHS = [
-    "dec",
-    "jan",
-    "feb",
-    "mar",
-    "open",
-]
-
-DIVISION_HEADING_RE = re.compile(
-    r"<h2>.*?USACO\s+(\d{4})\s+(\w+)\s+Contest,\s+(\w+)\s*</h2>",
-    re.IGNORECASE,
-)
-PROBLEM_BLOCK_RE = re.compile(
-    r"<b>([^<]+)</b>\s*<br\s*/?>.*?"
-    r"viewproblem2&cpid=(\d+)",
-    re.DOTALL,
-)
-SAMPLE_IN_RE = re.compile(r"<pre\s+class=['\"]in['\"]>(.*?)</pre>", re.DOTALL)
-SAMPLE_OUT_RE = re.compile(r"<pre\s+class=['\"]out['\"]>(.*?)</pre>", re.DOTALL)
-TIME_NOTE_RE = re.compile(
-    r"time\s+limit\s+(?:for\s+this\s+problem\s+is\s+)?(\d+)s",
-    re.IGNORECASE,
-)
-MEMORY_NOTE_RE = re.compile(
-    r"memory\s+limit\s+(?:for\s+this\s+problem\s+is\s+)?(\d+)\s*MB",
-    re.IGNORECASE,
-)
-RESULTS_PAGE_RE = re.compile(
-    r'href="index\.php\?page=([a-z]+\d{2,4}results)"',
-    re.IGNORECASE,
-)
-
-
-async def _fetch_text(client: httpx.AsyncClient, url: str) -> str:
-    r = await client.get(
-        url, headers=HEADERS, timeout=HTTP_TIMEOUT, follow_redirects=True
-    )
-    r.raise_for_status()
-    return r.text
-
-
-def _parse_results_page(html: str) -> dict[str, list[tuple[str, str]]]:
-    sections: dict[str, list[tuple[str, str]]] = {}
-    current_div: str | None = None
-
-    parts = re.split(r"(<h2>.*?</h2>)", html, flags=re.DOTALL)
-    for part in parts:
-        heading_m = DIVISION_HEADING_RE.search(part)
-        if heading_m:
-            div = heading_m.group(3)
-            if div:
-                key = div.lower()
-                current_div = key
-                sections.setdefault(key, [])
-            continue
-        if current_div is not None:
-            for m in PROBLEM_BLOCK_RE.finditer(part):
-                name = m.group(1).strip()
-                cpid = m.group(2)
-                sections[current_div].append((cpid, name))
-
-    return sections
-
-
-def _parse_contest_id(contest_id: str) -> tuple[str, str]:
-    parts = contest_id.rsplit("_", 1)
-    if len(parts) != 2:
-        return contest_id, ""
-    return parts[0], parts[1].lower()
-
-
-def _results_page_slug(month_year: str) -> str:
-    return f"{month_year}results"
-
-
-def _parse_problem_page(html: str) -> dict[str, Any]:
-    inputs = SAMPLE_IN_RE.findall(html)
-    outputs = SAMPLE_OUT_RE.findall(html)
-    tests: list[TestCase] = []
-    for inp, out in zip(inputs, outputs):
-        tests.append(
-            TestCase(
-                input=inp.strip().replace("\r", ""),
-                expected=out.strip().replace("\r", ""),
-            )
-        )
-
-    tm = TIME_NOTE_RE.search(html)
-    mm = MEMORY_NOTE_RE.search(html)
-    timeout_ms = int(tm.group(1)) * 1000 if tm else 4000
-    memory_mb = int(mm.group(1)) if mm else 256
-
-    interactive = "interactive problem" in html.lower()
-    precision = extract_precision(html)
-
-    return {
-        "tests": tests,
-        "timeout_ms": timeout_ms,
-        "memory_mb": memory_mb,
-        "interactive": interactive,
-        "precision": precision,
-    }
-
-
-def _pick_lang_option(select_body: str, language_id: str) -> str | None:
-    keywords = _LANG_KEYWORDS.get(language_id.lower(), [language_id.lower()])
-    options = [
-        (m.group(1), m.group(2).strip().lower())
-        for m in re.finditer(
-            r'<option\b[^>]*\bvalue=["\']([^"\']*)["\'][^>]*>([^<]+)',
-            select_body,
-            re.IGNORECASE,
-        )
-    ]
-    for kw in keywords:
-        for val, text in options:
-            if kw in text:
-                return val
-    return None
-
-
-def _parse_submit_form(
-    html: str, language_id: str
-) -> tuple[str, dict[str, str], str | None]:
-    form_action = _AUTH_BASE + _SUBMIT_PATH
-    hidden: dict[str, str] = {}
-    lang_val: str | None = None
-    for form_m in re.finditer(
-        r'<form\b[^>]*action=["\']([^"\']+)["\'][^>]*>(.*?)</form>',
-        html,
-        re.DOTALL | re.IGNORECASE,
-    ):
-        action, body = form_m.group(1), form_m.group(2)
-        if "sourcefile" not in body.lower():
-            continue
-        if action.startswith("http"):
-            form_action = action
-        elif action.startswith("/"):
-            form_action = _AUTH_BASE + action
-        else:
-            form_action = _AUTH_BASE + "/" + action
-        for input_m in re.finditer(
-            r'<input\b[^>]*\btype=["\']hidden["\'][^>]*/?>',
-            body,
-            re.IGNORECASE,
-        ):
-            tag = input_m.group(0)
-            name_m = re.search(r'\bname=["\']([^"\']+)["\']', tag, re.IGNORECASE)
-            val_m = re.search(r'\bvalue=["\']([^"\']*)["\']', tag, re.IGNORECASE)
-            if name_m and val_m:
-                hidden[name_m.group(1)] = val_m.group(1)
-        for sel_m in re.finditer(
-            r'<select\b[^>]*\bname=["\']([^"\']+)["\'][^>]*>(.*?)</select>',
-            body,
-            re.DOTALL | re.IGNORECASE,
-        ):
-            name, sel_body = sel_m.group(1), sel_m.group(2)
-            if "lang" in name.lower():
-                lang_val = _pick_lang_option(sel_body, language_id)
-                break
-        break
-    return form_action, hidden, lang_val
-
-
-async def _load_usaco_cookies(client: httpx.AsyncClient) -> None:
-    data = load_platform_cookies("usaco")
-    if isinstance(data, dict):
-        for k, v in data.items():
-            client.cookies.set(k, v)
-
-
-async def _save_usaco_cookies(client: httpx.AsyncClient) -> None:
-    cookies = dict(client.cookies.items())
-    if cookies:
-        save_platform_cookies("usaco", cookies)
-
-
-async def _check_usaco_login(client: httpx.AsyncClient, username: str) -> bool:
-    try:
-        r = await client.get(
-            f"{_AUTH_BASE}/index.php",
-            headers=HEADERS,
-            timeout=HTTP_TIMEOUT,
-        )
-        text = r.text.lower()
-        return username.lower() in text or "logout" in text
-    except Exception:
-        return False
-
-
-async def _do_usaco_login(
-    client: httpx.AsyncClient, username: str, password: str
-) -> bool:
-    r = await client.post(
-        f"{_AUTH_BASE}{_LOGIN_PATH}",
-        data={"uname": username, "password": password},
-        headers=HEADERS,
-        timeout=HTTP_TIMEOUT,
-    )
-    r.raise_for_status()
-    try:
-        return r.json().get("code") == 1
-    except Exception:
-        return False
-
-
-class USACOScraper(BaseScraper):
-    @property
-    def platform_name(self) -> str:
-        return "usaco"
-
-    async def scrape_contest_metadata(self, contest_id: str) -> MetadataResult:
-        try:
-            month_year, division = _parse_contest_id(contest_id)
-            if not division:
-                return self._metadata_error(
-                    f"Invalid contest ID '{contest_id}'. "
-                    "Expected format: <monthYY>_<division> (e.g. dec24_gold)"
-                )
-
-            slug = _results_page_slug(month_year)
-            async with httpx.AsyncClient() as client:
-                html = await _fetch_text(client, f"{BASE_URL}/index.php?page={slug}")
-            sections = _parse_results_page(html)
-            problems_raw = sections.get(division, [])
-            if not problems_raw:
-                return self._metadata_error(
-                    f"No problems found for {contest_id} (division: {division})"
-                )
-            problems = [
-                ProblemSummary(id=cpid, name=name) for cpid, name in problems_raw
-            ]
-            return MetadataResult(
-                success=True,
-                error="",
-                contest_id=contest_id,
-                problems=problems,
-                url=f"{BASE_URL}/index.php?page=viewproblem2&cpid=%s",
-            )
-        except Exception as e:
-            return self._metadata_error(str(e))
-
-    async def scrape_contest_list(self) -> ContestListResult:
-        try:
-            async with httpx.AsyncClient(
-                limits=httpx.Limits(max_connections=CONNECTIONS)
-            ) as client:
-                html = await _fetch_text(client, f"{BASE_URL}/index.php?page=contests")
-
-                page_slugs: set[str] = set()
-                for m in RESULTS_PAGE_RE.finditer(html):
-                    page_slugs.add(m.group(1))
-
-                recent_patterns = []
-                for year in range(15, 27):
-                    for month in MONTHS:
-                        recent_patterns.append(f"{month}{year:02d}results")
-                page_slugs.update(recent_patterns)
-
-                contests: list[ContestSummary] = []
-                sem = asyncio.Semaphore(CONNECTIONS)
-
-                async def check_page(slug: str) -> list[ContestSummary]:
-                    async with sem:
-                        try:
-                            page_html = await _fetch_text(
-                                client, f"{BASE_URL}/index.php?page={slug}"
-                            )
-                        except Exception:
-                            return []
-                        sections = _parse_results_page(page_html)
-                        if not sections:
-                            return []
-                        month_year = slug.replace("results", "")
-                        out: list[ContestSummary] = []
-                        for div in sections:
-                            cid = f"{month_year}_{div}"
-                            year_m = re.search(r"\d{2,4}", month_year)
-                            month_m = re.search(r"[a-z]+", month_year)
-                            year_str = year_m.group() if year_m else ""
-                            month_str = month_m.group().capitalize() if month_m else ""
-                            if len(year_str) == 2:
-                                year_str = f"20{year_str}"
-                            display = (
-                                f"USACO {year_str} {month_str} - {div.capitalize()}"
-                            )
-                            out.append(
-                                ContestSummary(id=cid, name=cid, display_name=display)
-                            )
-                        return out
-
-                tasks = [check_page(slug) for slug in sorted(page_slugs)]
-                for coro in asyncio.as_completed(tasks):
-                    contests.extend(await coro)
-
-            if not contests:
-                return ContestListResult(
-                    success=False, error="No contests found", supports_countdown=False
-                )
-            return ContestListResult(
-                success=True, error="", contests=contests, supports_countdown=False
-            )
-        except Exception as e:
-            return ContestListResult(
-                success=False, error=str(e), supports_countdown=False
-            )
-
-    async def stream_tests_for_category_async(self, category_id: str) -> None:
-        month_year, division = _parse_contest_id(category_id)
-        if not division:
-            return
-
-        slug = _results_page_slug(month_year)
-        async with httpx.AsyncClient(
-            limits=httpx.Limits(max_connections=CONNECTIONS)
-        ) as client:
-            try:
-                html = await _fetch_text(client, f"{BASE_URL}/index.php?page={slug}")
-            except Exception:
-                return
-
-            sections = _parse_results_page(html)
-            problems_raw = sections.get(division, [])
-            if not problems_raw:
-                return
-
-            sem = asyncio.Semaphore(CONNECTIONS)
-
-            async def run_one(cpid: str) -> dict[str, Any]:
-                async with sem:
-                    try:
-                        problem_html = await _fetch_text(
-                            client,
-                            f"{BASE_URL}/index.php?page=viewproblem2&cpid={cpid}",
-                        )
-                        info = _parse_problem_page(problem_html)
-                    except Exception:
-                        info = {
-                            "tests": [],
-                            "timeout_ms": 4000,
-                            "memory_mb": 256,
-                            "interactive": False,
-                            "precision": None,
-                        }
-
-                    tests = cast(list[TestCase], info["tests"])
-                    combined_input = "\n".join(t.input for t in tests) if tests else ""
-                    combined_expected = (
-                        "\n".join(t.expected for t in tests) if tests else ""
-                    )
-
-                    return {
-                        "problem_id": cpid,
-                        "combined": {
-                            "input": combined_input,
-                            "expected": combined_expected,
-                        },
-                        "tests": [
-                            {"input": t.input, "expected": t.expected} for t in tests
-                        ],
-                        "timeout_ms": info["timeout_ms"],
-                        "memory_mb": info["memory_mb"],
-                        "interactive": info["interactive"],
-                        "multi_test": False,
-                        "precision": info["precision"],
-                    }
-
-            tasks = [run_one(cpid) for cpid, _ in problems_raw]
-            for coro in asyncio.as_completed(tasks):
-                payload = await coro
-                print(json.dumps(payload), flush=True)
-
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        file_path: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        source = Path(file_path).read_bytes()
-        username = credentials.get("username", "")
-        password = credentials.get("password", "")
-        if not username or not password:
-            return self._submit_error("Missing credentials. Use :CP usaco login")
-
-        async with httpx.AsyncClient(follow_redirects=True) as client:
-            await _load_usaco_cookies(client)
-            if client.cookies:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                if not await _check_usaco_login(client, username):
-                    client.cookies.clear()
-                    print(json.dumps({"status": "logging_in"}), flush=True)
-                    try:
-                        ok = await _do_usaco_login(client, username, password)
-                    except Exception as e:
-                        return self._submit_error(f"Login failed: {e}")
-                    if not ok:
-                        return self._submit_error("bad_credentials")
-                    await _save_usaco_cookies(client)
-            else:
-                print(json.dumps({"status": "logging_in"}), flush=True)
-                try:
-                    ok = await _do_usaco_login(client, username, password)
-                except Exception as e:
-                    return self._submit_error(f"Login failed: {e}")
-                if not ok:
-                    return self._submit_error("bad_credentials")
-                await _save_usaco_cookies(client)
-
-            result = await self._do_submit(client, problem_id, language_id, source)
-
-            if result.success or result.error != "auth_failure":
-                return result
-
-            client.cookies.clear()
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            try:
-                ok = await _do_usaco_login(client, username, password)
-            except Exception as e:
-                return self._submit_error(f"Login failed: {e}")
-            if not ok:
-                return self._submit_error("bad_credentials")
-            await _save_usaco_cookies(client)
-
-            return await self._do_submit(client, problem_id, language_id, source)
-
-    async def _do_submit(
-        self,
-        client: httpx.AsyncClient,
-        problem_id: str,
-        language_id: str,
-        source: bytes,
-    ) -> SubmitResult:
-        print(json.dumps({"status": "submitting"}), flush=True)
-        try:
-            page_r = await client.get(
-                f"{_AUTH_BASE}/index.php?page=viewproblem2&cpid={problem_id}",
-                headers=HEADERS,
-                timeout=HTTP_TIMEOUT,
-            )
-            page_url = str(page_r.url)
-            if "/login" in page_url or "Login" in page_r.text[:2000]:
-                return self._submit_error("auth_failure")
-            form_url, hidden_fields, lang_val = _parse_submit_form(
-                page_r.text, language_id
-            )
-        except Exception:
-            form_url = _AUTH_BASE + _SUBMIT_PATH
-            hidden_fields = {}
-            lang_val = None
-
-        data: dict[str, str] = {"cpid": problem_id, **hidden_fields}
-        data["language"] = lang_val if lang_val is not None else language_id
-        ext = "py" if "python" in language_id.lower() else "cpp"
-        try:
-            r = await client.post(
-                form_url,
-                data=data,
-                files={"sourcefile": (f"solution.{ext}", source, "text/plain")},
-                headers=HEADERS,
-                timeout=HTTP_TIMEOUT,
-            )
-            r.raise_for_status()
-        except Exception as e:
-            return self._submit_error(f"Submit request failed: {e}")
-
-        try:
-            resp = r.json()
-            if resp.get("code") == 0 and "login" in resp.get("message", "").lower():
-                return self._submit_error("auth_failure")
-            sid = str(resp.get("submission_id", resp.get("id", "")))
-        except Exception:
-            sid = ""
-        return SubmitResult(
-            success=True, error="", submission_id=sid, verdict="submitted"
-        )
-
-    async def login(self, credentials: dict[str, str]) -> LoginResult:
-        username = credentials.get("username", "")
-        password = credentials.get("password", "")
-        if not username or not password:
-            return self._login_error("Missing username or password")
-
-        async with httpx.AsyncClient(follow_redirects=True) as client:
-            await _load_usaco_cookies(client)
-            if client.cookies:
-                print(json.dumps({"status": "checking_login"}), flush=True)
-                if await _check_usaco_login(client, username):
-                    return LoginResult(
-                        success=True,
-                        error="",
-                    )
-
-            print(json.dumps({"status": "logging_in"}), flush=True)
-            try:
-                ok = await _do_usaco_login(client, username, password)
-            except Exception as e:
-                return self._login_error(f"Login request failed: {e}")
-
-            if not ok:
-                return self._login_error("bad_credentials")
-
-            await _save_usaco_cookies(client)
-        return LoginResult(
-            success=True,
-            error="",
-        )
-
-
-if __name__ == "__main__":
-    USACOScraper().run_cli()

scripts/ci.sh

@@ -1,13 +0,0 @@
-#!/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 . --checklevel=Warning
-nix develop --command ruff format --check .
-nix develop --command ruff check .
-nix develop --command ty check .
-nix develop --command python -m pytest tests/ -v

scripts/stress.py

@@ -1,113 +0,0 @@
-#!/usr/bin/env python3
-import subprocess
-import sys
-
-
-def main() -> None:
-    argv = sys.argv[1:]
-    max_iterations = 1000
-    timeout = 10
-
-    positional: list[str] = []
-    i = 0
-    while i < len(argv):
-        if argv[i] == "--max-iterations" and i + 1 < len(argv):
-            max_iterations = int(argv[i + 1])
-            i += 2
-        elif argv[i] == "--timeout" and i + 1 < len(argv):
-            timeout = int(argv[i + 1])
-            i += 2
-        else:
-            positional.append(argv[i])
-            i += 1
-
-    if len(positional) != 3:
-        print(
-            "Usage: stress.py <generator> <brute> <candidate> "
-            "[--max-iterations N] [--timeout S]",
-            file=sys.stderr,
-        )
-        sys.exit(1)
-
-    generator, brute, candidate = positional
-
-    for iteration in range(1, max_iterations + 1):
-        try:
-            gen_result = subprocess.run(
-                generator,
-                capture_output=True,
-                text=True,
-                shell=True,
-                timeout=timeout,
-            )
-        except subprocess.TimeoutExpired:
-            print(
-                f"[stress] generator timed out on iteration {iteration}",
-                file=sys.stderr,
-            )
-            sys.exit(1)
-
-        if gen_result.returncode != 0:
-            print(
-                f"[stress] generator failed on iteration {iteration} "
-                f"(exit code {gen_result.returncode})",
-                file=sys.stderr,
-            )
-            if gen_result.stderr:
-                print(gen_result.stderr, file=sys.stderr, end="")
-            sys.exit(1)
-
-        test_input = gen_result.stdout
-
-        try:
-            brute_result = subprocess.run(
-                brute,
-                input=test_input,
-                capture_output=True,
-                text=True,
-                shell=True,
-                timeout=timeout,
-            )
-        except subprocess.TimeoutExpired:
-            print(f"[stress] brute timed out on iteration {iteration}", file=sys.stderr)
-            print(f"\n--- input ---\n{test_input}", end="")
-            sys.exit(1)
-
-        try:
-            cand_result = subprocess.run(
-                candidate,
-                input=test_input,
-                capture_output=True,
-                text=True,
-                shell=True,
-                timeout=timeout,
-            )
-        except subprocess.TimeoutExpired:
-            print(
-                f"[stress] candidate timed out on iteration {iteration}",
-                file=sys.stderr,
-            )
-            print(f"\n--- input ---\n{test_input}", end="")
-            sys.exit(1)
-
-        brute_out = brute_result.stdout.strip()
-        cand_out = cand_result.stdout.strip()
-
-        if brute_out != cand_out:
-            print(f"[stress] mismatch on iteration {iteration}", file=sys.stderr)
-            print(f"\n--- input ---\n{test_input}", end="")
-            print(f"\n--- expected (brute) ---\n{brute_out}")
-            print(f"\n--- actual (candidate) ---\n{cand_out}")
-            sys.exit(1)
-
-        print(f"[stress] iteration {iteration} OK", file=sys.stderr)
-
-    print(
-        f"[stress] all {max_iterations} iterations passed",
-        file=sys.stderr,
-    )
-    sys.exit(0)
-
-
-if __name__ == "__main__":
-    main()

selene.toml

@@ -1,4 +1 @@
 std = 'vim'
-
-[lints]
-bad_string_escape = 'allow'

tests/conftest.py

@@ -7,11 +7,10 @@ from pathlib import Path
 from types import SimpleNamespace
 from typing import Any
 
-import re
-
 import httpx
 import pytest
 import requests
+from scrapling import fetchers
 
 ROOT = Path(__file__).resolve().parent.parent
 FIX = Path(__file__).resolve().parent / "fixtures"
@@ -105,35 +104,6 @@ def run_scraper_offline(fixture_text):
 
         raise AssertionError(f"No fixture for Codeforces url={url!r}")
 
-    def _router_kattis(*, url: str) -> str:
-        url = url.removeprefix("https://open.kattis.com")
-        if "/contests?" in url:
-            return fixture_text("kattis/contests.html")
-        m = re.search(r"/contests/([^/]+)/problems", url)
-        if m:
-            try:
-                return fixture_text(f"kattis/contest_{m.group(1)}_problems.html")
-            except FileNotFoundError:
-                return "<html></html>"
-        if "/problems/" in url and "/file/statement" not in url:
-            slug = url.rstrip("/").split("/")[-1]
-            return fixture_text(f"kattis/problem_{slug}.html")
-        raise AssertionError(f"No fixture for Kattis url={url!r}")
-
-    def _router_usaco(*, url: str) -> str:
-        if "page=contests" in url and "results" not in url:
-            return fixture_text("usaco/contests.html")
-        m = re.search(r"page=([a-z]+\d{2,4}results)", url)
-        if m:
-            try:
-                return fixture_text(f"usaco/{m.group(1)}.html")
-            except FileNotFoundError:
-                return "<html></html>"
-        m = re.search(r"page=viewproblem2&cpid=(\d+)", url)
-        if m:
-            return fixture_text(f"usaco/problem_{m.group(1)}.html")
-        raise AssertionError(f"No fixture for USACO url={url!r}")
-
     def _make_offline_fetches(scraper_name: str):
         match scraper_name:
             case "cses":
@@ -166,10 +136,12 @@ def run_scraper_offline(fixture_text):
 
             case "codeforces":
 
-                def _mock_fetch_problems_html(cid: str) -> str:
-                    return _router_codeforces(
-                        url=f"https://codeforces.com/contest/{cid}/problems"
-                    )
+                class MockCodeForcesPage:
+                    def __init__(self, html: str):
+                        self.html_content = html
+
+                def _mock_stealthy_fetch(url: str, **kwargs):
+                    return MockCodeForcesPage(_router_codeforces(url=url))
 
                 def _mock_requests_get(url: str, **kwargs):
                     if "api/contest.list" in url:
@@ -200,7 +172,7 @@ def run_scraper_offline(fixture_text):
                     raise AssertionError(f"Unexpected requests.get call: {url}")
 
                 return {
-                    "_fetch_problems_html": _mock_fetch_problems_html,
+                    "Fetcher.get": _mock_stealthy_fetch,
                     "requests.get": _mock_requests_get,
                 }
 
@@ -221,9 +193,6 @@ def run_scraper_offline(fixture_text):
                     if "/api/list/contests/all" in url:
                         data = json.loads(fixture_text("codechef/contests.json"))
                         return MockResponse(data)
-                    if "/api/list/contests/past" in url:
-                        data = json.loads(fixture_text("codechef/contests_past.json"))
-                        return MockResponse(data)
                     if "/api/contests/START" in url and "/problems/" not in url:
                         contest_id = url.rstrip("/").split("/")[-1]
                         try:
@@ -243,39 +212,21 @@ def run_scraper_offline(fixture_text):
                         return MockResponse(data)
                     raise AssertionError(f"No fixture for CodeChef url={url!r}")
 
+                class MockCodeChefPage:
+                    def __init__(self, html: str):
+                        self.body = html
+                        self.status = 200
+
+                def _mock_stealthy_fetch(url: str, **kwargs):
+                    if "/problems/" in url:
+                        problem_id = url.rstrip("/").split("/")[-1]
+                        html = fixture_text(f"codechef/{problem_id}.html")
+                        return MockCodeChefPage(html)
+                    raise AssertionError(f"No fixture for CodeChef url={url!r}")
+
                 return {
                     "__offline_get_async": __offline_get_async,
-                }
-
-            case "kattis":
-
-                async def __offline_get_kattis(client, url: str, **kwargs):
-                    if "/file/statement/samples.zip" in url:
-                        raise httpx.HTTPError("not found")
-                    html = _router_kattis(url=url)
-                    return SimpleNamespace(
-                        text=html,
-                        content=html.encode(),
-                        status_code=200,
-                        raise_for_status=lambda: None,
-                    )
-
-                return {
-                    "__offline_get_async": __offline_get_kattis,
-                }
-
-            case "usaco":
-
-                async def __offline_get_usaco(client, url: str, **kwargs):
-                    html = _router_usaco(url=url)
-                    return SimpleNamespace(
-                        text=html,
-                        status_code=200,
-                        raise_for_status=lambda: None,
-                    )
-
-                return {
-                    "__offline_get_async": __offline_get_usaco,
+                    "Fetcher.get": _mock_stealthy_fetch,
                 }
 
             case _:
@@ -286,8 +237,6 @@ def run_scraper_offline(fixture_text):
         "atcoder": "AtcoderScraper",
         "codeforces": "CodeforcesScraper",
         "codechef": "CodeChefScraper",
-        "kattis": "KattisScraper",
-        "usaco": "USACOScraper",
     }
 
     def _run(scraper_name: str, mode: str, *args: str):
@@ -296,15 +245,16 @@ def run_scraper_offline(fixture_text):
         offline_fetches = _make_offline_fetches(scraper_name)
 
         if scraper_name == "codeforces":
-            ns._fetch_problems_html = offline_fetches["_fetch_problems_html"]
+            fetchers.Fetcher.get = offline_fetches["Fetcher.get"]
             requests.get = offline_fetches["requests.get"]
         elif scraper_name == "atcoder":
             ns._fetch = offline_fetches["_fetch"]
             ns._get_async = offline_fetches["_get_async"]
         elif scraper_name == "cses":
             httpx.AsyncClient.get = offline_fetches["__offline_fetch_text"]
-        elif scraper_name in ("codechef", "kattis", "usaco"):
+        elif scraper_name == "codechef":
             httpx.AsyncClient.get = offline_fetches["__offline_get_async"]
+            fetchers.Fetcher.get = offline_fetches["Fetcher.get"]
 
         scraper_class = getattr(ns, scraper_classes[scraper_name])
         scraper = scraper_class()

tests/fixtures/codechef/contests_past.json

@@ -1,16 +0,0 @@
-{
-  "status": "success",
-  "message": "past contests list",
-  "contests": [
-    {
-      "contest_code": "START209D",
-      "contest_name": "Starters 209 Div 4",
-      "contest_start_date_iso": "2025-01-01T10:30:00+05:30"
-    },
-    {
-      "contest_code": "START208",
-      "contest_name": "Starters 208",
-      "contest_start_date_iso": "2024-12-25T10:30:00+05:30"
-    }
-  ]
-}

tests/fixtures/kattis/contest_open2024_problems.html

@@ -1,10 +0,0 @@
-<html><body><table>
-<tr>
-  <td>A</td>
-  <td><a href="/contests/open2024/problems/kth2024a">Arithmetic Sequence</a></td>
-</tr>
-<tr>
-  <td>B</td>
-  <td><a href="/contests/open2024/problems/kth2024b">Binary Tree</a></td>
-</tr>
-</table></body></html>

tests/fixtures/kattis/contests.html

@@ -1,10 +0,0 @@
-<html><body><table>
-<tr>
-  <td><a href="/contests/open2024">Open 2024</a></td>
-  <td data-timestamp="1711800000">2024-03-30</td>
-</tr>
-<tr>
-  <td><a href="/contests/icpc2023">ICPC 2023</a></td>
-  <td data-timestamp="1698768000">2023-10-31</td>
-</tr>
-</table></body></html>

tests/fixtures/kattis/problem_hello.html

@@ -1,11 +0,0 @@
-<html>
-<head><title>Hello World</title></head>
-<body>
-<span>CPU Time limit</span><span class="num">1 second</span>
-<span>Memory limit</span><span class="num">256 MB</span>
-<table class="sample">
-<pre>Hello World</pre>
-<pre>Hello World</pre>
-</table>
-</body>
-</html>

tests/fixtures/kattis/problem_kth2024a.html

@@ -1,17 +0,0 @@
-<html>
-<head><title>Arithmetic Sequence</title></head>
-<body>
-<span>CPU Time limit</span><span class="num">2 seconds</span>
-<span>Memory limit</span><span class="num">512 MB</span>
-<table class="sample">
-<pre>3
-1 2 3</pre>
-<pre>YES</pre>
-</table>
-<table class="sample">
-<pre>2
-1 3</pre>
-<pre>NO</pre>
-</table>
-</body>
-</html>

tests/fixtures/kattis/problem_kth2024b.html

@@ -1,12 +0,0 @@
-<html>
-<head><title>Binary Tree</title></head>
-<body>
-<span>CPU Time limit</span><span class="num">1 second</span>
-<span>Memory limit</span><span class="num">256 MB</span>
-<table class="sample">
-<pre>5
-1 2 3 4 5</pre>
-<pre>3</pre>
-</table>
-</body>
-</html>

tests/fixtures/usaco/contests.html

@@ -1,3 +0,0 @@
-<html><body>
-<a href="index.php?page=dec24results">December 2024 Results</a>
-</body></html>

tests/fixtures/usaco/dec24results.html

@@ -1,14 +0,0 @@
-<html><body>
-
-<h2>USACO 2024 December Contest, Gold</h2>
-
-<b>Farmer John's Favorite Problem</b><br/>
-<a href="index.php?page=viewproblem2&cpid=1469">View Problem</a>
-
-<b>Binary Indexed Tree</b><br/>
-<a href="index.php?page=viewproblem2&cpid=1470">View Problem</a>
-
-<b>Counting Subsequences</b><br/>
-<a href="index.php?page=viewproblem2&cpid=1471">View Problem</a>
-
-</body></html>

tests/fixtures/usaco/problem_1469.html

@@ -1,10 +0,0 @@
-<html><body>
-<p>Time limit: 4s. Memory limit: 256 MB.</p>
-<p>Given N cows, find the answer.</p>
-<pre class="in">3
-1 2 3</pre>
-<pre class="out">6</pre>
-<pre class="in">1
-5</pre>
-<pre class="out">5</pre>
-</body></html>

tests/fixtures/usaco/problem_1470.html

@@ -1,7 +0,0 @@
-<html><body>
-<p>Time limit: 2s. Memory limit: 512 MB.</p>
-<p>Build a binary indexed tree.</p>
-<pre class="in">4
-1 3 2 4</pre>
-<pre class="out">10</pre>
-</body></html>

tests/fixtures/usaco/problem_1471.html

@@ -1,7 +0,0 @@
-<html><body>
-<p>Time limit: 4s. Memory limit: 256 MB.</p>
-<p>Output the answer with absolute error at most 10^{-6}.</p>
-<pre class="in">2
-1 2</pre>
-<pre class="out">1.500000</pre>
-</body></html>

tests/test_scrapers.py

@@ -1,12 +1,16 @@
 import pytest
 
-from scrapers.language_ids import LANGUAGE_IDS
 from scrapers.models import (
     ContestListResult,
     MetadataResult,
     TestsResult,
 )
 
+MODEL_FOR_MODE = {
+    "metadata": MetadataResult,
+    "contests": ContestListResult,
+}
+
 MATRIX = {
     "cses": {
         "metadata": ("introductory_problems",),
@@ -28,16 +32,6 @@ MATRIX = {
         "tests": ("START209D",),
         "contests": tuple(),
     },
-    "kattis": {
-        "metadata": ("hello",),
-        "tests": ("hello",),
-        "contests": tuple(),
-    },
-    "usaco": {
-        "metadata": ("dec24_gold",),
-        "tests": ("dec24_gold",),
-        "contests": tuple(),
-    },
 }
 
 
@@ -49,16 +43,17 @@ def test_scraper_offline_fixture_matrix(run_scraper_offline, scraper, mode):
     assert rc in (0, 1), f"Bad exit code {rc}"
     assert objs, f"No JSON output for {scraper}:{mode}"
 
-    if mode == "metadata":
-        model = MetadataResult.model_validate(objs[-1])
+    if mode in ("metadata", "contests"):
+        Model = MODEL_FOR_MODE[mode]
+        model = Model.model_validate(objs[-1])
+        assert model is not None
         assert model.success is True
-        assert model.url
-        assert len(model.problems) >= 1
-        assert all(isinstance(p.id, str) and p.id for p in model.problems)
-    elif mode == "contests":
-        model = ContestListResult.model_validate(objs[-1])
-        assert model.success is True
-        assert len(model.contests) >= 1
+        if mode == "metadata":
+            assert model.url
+            assert len(model.problems) >= 1
+            assert all(isinstance(p.id, str) and p.id for p in model.problems)
+        else:
+            assert len(model.contests) >= 1
     else:
         assert len(objs) >= 1, "No test objects returned"
         validated_any = False
@@ -96,61 +91,5 @@ def test_scraper_offline_fixture_matrix(run_scraper_offline, scraper, mode):
                 )
                 assert "multi_test" in obj, "Missing multi_test field in raw JSON"
                 assert isinstance(obj["multi_test"], bool), "multi_test not boolean"
-                assert "precision" in obj, "Missing precision field in raw JSON"
-                assert obj["precision"] is None or isinstance(
-                    obj["precision"], float
-                ), "precision must be None or float"
                 validated_any = True
         assert validated_any, "No valid tests payloads validated"
-
-
-def test_kattis_contest_metadata(run_scraper_offline):
-    rc, objs = run_scraper_offline("kattis", "metadata", "open2024")
-    assert rc == 0
-    assert objs
-    model = MetadataResult.model_validate(objs[-1])
-    assert model.success is True
-    assert len(model.problems) == 2
-    assert model.contest_url != ""
-    assert model.standings_url != ""
-
-
-def test_usaco_precision_extracted(run_scraper_offline):
-    rc, objs = run_scraper_offline("usaco", "tests", "dec24_gold")
-    assert rc == 0
-    precisions = [obj["precision"] for obj in objs if "problem_id" in obj]
-    assert any(p is not None for p in precisions), (
-        "Expected at least one problem with precision"
-    )
-
-
-@pytest.mark.parametrize(
-    "scraper,contest_id",
-    [
-        ("cses", "nonexistent_category_xyz"),
-        ("usaco", "badformat"),
-        ("kattis", "nonexistent_problem_xyz"),
-    ],
-)
-def test_scraper_metadata_error(run_scraper_offline, scraper, contest_id):
-    rc, objs = run_scraper_offline(scraper, "metadata", contest_id)
-    assert rc == 1
-    assert objs
-    assert objs[-1].get("success") is False
-    assert objs[-1].get("error")
-
-
-def test_language_ids_coverage():
-    expected_platforms = {
-        "atcoder",
-        "codeforces",
-        "cses",
-        "usaco",
-        "kattis",
-        "codechef",
-    }
-    assert set(LANGUAGE_IDS.keys()) == expected_platforms
-    for platform, langs in LANGUAGE_IDS.items():
-        assert {"cpp", "python"} <= set(langs.keys()), f"{platform} missing cpp/python"
-        for lang, lid in langs.items():
-            assert isinstance(lid, str) and lid, f"{platform}/{lang} empty ID"

vim.toml

@@ -0,0 +1,30 @@
+[selene]
+base = "lua51"
+name = "vim"
+
+[vim]
+any = true
+
+[jit]
+any = true
+
+[assert]
+any = true
+
+[describe]
+any = true
+
+[it]
+any = true
+
+[before_each]
+any = true
+
+[after_each]
+any = true
+
+[spy]
+any = true
+
+[stub]
+any = true

vim.yaml

@@ -1,26 +0,0 @@
----
-base: lua51
-name: vim
-lua_versions:
-  - luajit
-globals:
-  vim:
-    any: true
-  jit:
-    any: true
-  assert:
-    any: true
-  describe:
-    any: true
-  it:
-    any: true
-  before_each:
-    any: true
-  after_each:
-    any: true
-  spy:
-    any: true
-  stub:
-    any: true
-  bit:
-    any: true