.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

@@ -14,6 +14,3 @@ __pycache__
 .claude/
 
 node_modules/
-
-.envrc
-.direnv/

.luarc.json

@@ -1,16 +1,8 @@
 {
-  "runtime": {
-    "version": "LuaJIT",
-    "path": ["lua/?.lua", "lua/?/init.lua"]
-  },
-  "diagnostics": {
-    "globals": ["vim"]
-  },
-  "workspace": {
-    "library": ["$VIMRUNTIME/lua", "${3rd}/luv/library", "${3rd}/busted/library"],
-    "checkThirdParty": false
-  },
-  "completion": {
-    "callSnippet": "Replace"
-  }
+  "runtime.version": "Lua 5.1",
+  "runtime.path": ["lua/?.lua", "lua/?/init.lua"],
+  "diagnostics.globals": ["vim"],
+  "workspace.library": ["$VIMRUNTIME/lua", "${3rd}/luv/library"],
+  "workspace.checkThirdParty": false,
+  "completion.callSnippet": "Replace"
 }

README.md

@@ -28,12 +28,11 @@ 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
 

doc/cp.nvim.txt

@@ -9,7 +9,7 @@ INTRODUCTION                                                         *cp.nvim*
 cp.nvim is a competitive programming plugin that automates problem setup,
 compilation, and testing workflow for online judges.
 
-Supported platforms: AtCoder, CodeChef, Codeforces, CSES, Kattis, USACO
+Supported platforms (for now!): AtCoder, Codeforces, CSES
 
 ==============================================================================
 REQUIREMENTS                                                 *cp-requirements*
@@ -19,20 +19,195 @@ REQUIREMENTS                                                 *cp-requirements*
 - uv package manager (https://docs.astral.sh/uv/)
 
 ==============================================================================
-SETUP                                                              *cp-setup*
+COMMANDS                                                         *cp-commands*
 
-Load cp.nvim with your package manager. For example, with lazy.nvim: >lua
-    { 'barrettruth/cp.nvim' }
+:CP                                                                      *:CP*
+        cp.nvim uses a single :CP command with intelligent argument parsing:
+
+        Setup Commands ~
+            :CP {platform} {contest_id} [--lang {language}]
+                                Full setup: set platform and load contest metadata.
+                                Scrapes test cases and creates source file.
+                                --lang: Use specific language (default: platform default)
+                                Examples: >
+                                    :CP codeforces 1933
+                                    :CP codeforces 1933 --lang python
+<
+        View Commands ~
+            :CP run [all|n|n,m,...] [--debug]
+                                Run tests in I/O view (see |cp-io-view|).
+                                Lightweight split showing test verdicts.
+
+                                Execution modes:
+                                • :CP run              Combined: single execution with all tests
+                                                       (auto-switches to individual when multiple samples)
+                                • :CP run all          Individual: N separate executions
+                                • :CP run n            Individual: run test n only
+                                • :CP run n,m,...      Individual: run specific tests (e.g. nth and mth)
+
+                                --debug: Use debug build (builds to build/<name>.dbg)
+
+                                Combined mode runs all test inputs in one execution (matching
+                                platform behavior for multi-test problems). When a problem has
+                                multiple independent sample test cases, :CP run auto-switches to
+                                individual mode to run each sample separately.
+
+                                Examples: >
+                                    :CP run              " Combined: all tests, one execution
+                                    :CP run all          " Individual: all tests, N executions
+                                    :CP run 2            " Individual: test 2 only
+                                    :CP run 1,3,5        " Individual: tests 1, 3, and 5
+                                    :CP run all --debug  " Individual with debug build
+<
+            :CP panel [--debug] [n]
+                                Open full-screen test panel (see |cp-panel|).
+                                Aggregate table with diff modes for detailed analysis.
+                                Optional [n] focuses on specific test.
+                                --debug: Use debug build (with sanitizers, etc.)
+                                Examples: >
+                                    :CP panel            " All tests
+                                    :CP panel --debug 3  " Test 3, debug build
+<
+
+            :CP pick [--lang {language}]
+                                Launch configured picker for interactive
+                                platform/contest selection.
+                                --lang: Pre-select language for chosen contest.
+                                Example: >
+                                    :CP pick
+                                    :CP pick --lang python
+<
+
+            :CP interact [script]
+                                Open an interactive terminal for the current problem.
+                                If an executable interactor is provided, runs the compiled
+                                binary against the source file (see
+                                *cp-interact*). Otherwise, runs the source
+                                file. Only valid for interactive problems.
+
+        Navigation Commands ~
+            :CP next [--lang {language}]
+                                Navigate to next problem in current contest.
+                                Stops at last problem (no wrapping).
+                                --lang: Use specific language for next problem.
+                                By default, preserves current file's language if
+                                enabled for the new problem, otherwise uses platform
+                                default.
+                                Examples: >
+                                    :CP next
+                                    :CP next --lang python
+<
+            :CP prev [--lang {language}]
+                                Navigate to previous problem in current contest.
+                                Stops at first problem (no wrapping).
+                                --lang: Use specific language for previous problem.
+                                By default, preserves current file's language if
+                                enabled for the new problem, otherwise uses platform
+                                default.
+                                Examples: >
+                                    :CP prev
+                                    :CP prev --lang cpp
+<
+            :CP {problem_id} [--lang {language}]
+                                Jump to problem {problem_id} in a contest.
+                                Requires that a contest has already been set up.
+                                --lang: Use specific language for this problem.
+                                Examples: >
+                                    :CP B
+                                    :CP C --lang python
+<
+
+        Edit Commands ~
+            :CP edit [n]
+                                Open grid test editor showing all test cases.
+                                Tests displayed as 2×N grid (2 rows, N columns):
+                                • Top row: Test inputs (editable)
+                                • Bottom row: Expected outputs (editable)
+
+                                Optional [n]: Jump cursor to test n's input buffer
+
+                                Changes saved to both cache and disk on exit,
+                                taking effect immediately in :CP run and CLI.
+
+                                Keybindings (configurable via |EditConfig|):
+                                  q         Save all and exit editor
+                                  ]t        Jump to next test column
+                                  [t        Jump to previous test column
+                                  gd        Delete current test column
+                                  ga        Add new test column at end
+                                  <c-w>     Normal window navigation
+
+                                Examples: >
+                                    :CP edit        " Edit all tests
+                                    :CP edit 3      " Edit all, start at test 3
+<
+
+        State Restoration ~
+            :CP                 Restore state from current file.
+                                Automatically detects platform, contest, problem,
+                                and language from cached state. Use this after
+                                switching files to restore your CP environment.
+
+        Cache Commands ~
+            :CP cache clear [platform] [contest]
+                                Clear cache data at different granularities:
+                                • No args: Clear all cached data
+                                • [platform]: Clear all data for a platform
+                                • [platform] [contest]: Clear specific contest
+                                Examples: >
+                                    :CP cache clear
+                                    :CP cache clear codeforces
+                                    :CP cache clear codeforces 1848
+<
+            :CP cache read
+                                View the cache in a pretty-printed lua buffer.
+                                Exit with q.
+
+Template Variables ~
+                                                            *cp-template-vars*
+    Command templates support variable substitution using {variable} syntax:
+
+    • {source}      Source file path (e.g. "abc324a.cpp")
+    • {binary}      Output binary path (e.g. "build/abc324a.run" or
+                    "build/abc324a.dbg" for debug builds)
+
+    Example template: >
+        build = { 'g++', '{source}', '-o', '{binary}', '-std=c++17' }
+<    Would expand to: >
+        g++ abc324a.cpp -o build/abc324a.run -std=c++17
+<
+Debug Builds ~
+                                                            *cp-debug-builds*
+    The --debug flag uses the debug command configuration instead of build:
+
+    • Normal build:  commands.build → outputs to build/<name>.run
+    • Debug build:   commands.debug → outputs to build/<name>.dbg
+
+    Debug builds typically include sanitizers (address, undefined behavior) to
+    catch memory errors, buffer overflows, and other issues. Both binaries
+    coexist, so you can switch between normal and debug mode without
+    recompiling.
+
+    Example debug configuration: >
+        languages = {
+          cpp = {
+            extension = 'cc',
+            commands = {
+              build = { 'g++', '-std=c++17', '{source}', '-o', '{binary}' },
+              run   = { '{binary}' },
+              debug = { 'g++', '-std=c++17', '-fsanitize=address,undefined',
+                        '{source}', '-o', '{binary}' },
+            }
+          }
+        }
 <
-The plugin works automatically with no configuration required. For
-customization, see |cp-config|.
 
 ==============================================================================
 CONFIGURATION                                                      *cp-config*
 
-Configuration is done via `vim.g.cp`. Set this before using the plugin:
+Configuration is done via `vim.g.cp_config`. Set this before using the plugin:
 >lua
-    vim.g.cp = {
+    vim.g.cp_config = {
       languages = {
         cpp = {
           extension = 'cc',
@@ -68,18 +243,6 @@ Configuration is done via `vim.g.cp`. Set this before using the plugin:
           enabled_languages = { 'cpp', 'python' },
           default_language  = 'cpp',
         },
-        codechef = {
-          enabled_languages = { 'cpp', 'python' },
-          default_language  = 'cpp',
-        },
-        usaco = {
-          enabled_languages = { 'cpp', 'python' },
-          default_language  = 'cpp',
-        },
-        kattis = {
-          enabled_languages = { 'cpp', 'python' },
-          default_language  = 'cpp',
-        },
       },
       open_url = true,
       debug = false,
@@ -111,7 +274,7 @@ the default; per-platform overrides can tweak 'extension' or 'commands'.
 
 For example, to run CodeForces contests with Python by default:
 >lua
-    vim.g.cp = {
+    vim.g.cp_config = {
       platforms = {
         codeforces = {
           default_language  = 'python',
@@ -122,7 +285,7 @@ For example, to run CodeForces contests with Python by default:
 Any language is supported provided the proper configuration. For example, to
 run CSES problems with Rust using the single schema:
 >lua
-    vim.g.cp = {
+    vim.g.cp_config = {
       languages = {
         rust = {
           extension = 'rs',
@@ -155,7 +318,7 @@ run CSES problems with Rust using the single schema:
                         (default: concatenates contest_id and problem_id, lowercased)
         {ui}            (|CpUI|) UI settings: panel, diff backend, picker.
         {open_url}      (boolean) Open the contest & problem url in the browser
-                        when a new contest is opened or the active problem changes.
+                        when the contest is first opened.
 
                                                                   *CpPlatform*
     Fields: ~
@@ -232,340 +395,42 @@ run CSES problems with Rust using the single schema:
 
                                                                     *cp.Hooks*
     Fields: ~
-        {setup}  (|cp.CpSetupHooks|, optional) One-time initialization hooks.
-        {on}     (|cp.CpOnHooks|, optional) Recurring event hooks.
+        {before_run}       (function, optional) Called before test panel opens.
+                           function(state: cp.State)
+        {before_debug}     (function, optional) Called before debug build/run.
+                           function(state: cp.State)
+        {setup_code}       (function, optional) Called after source file is opened.
+                           function(state: cp.State)
+        {setup_io_input}   (function, optional) Called when I/O input buffer created.
+                           function(bufnr: integer, state: cp.State)
+                           Default: helpers.clearcol (removes line numbers/columns)
+        {setup_io_output}  (function, optional) Called when I/O output buffer created.
+                           function(bufnr: integer, state: cp.State)
+                           Default: helpers.clearcol (removes line numbers/columns)
 
-                                                             *cp.CpSetupHooks*
-    Fields: ~
-        {contest}  (function, optional) Called once when a contest directory
-                   is first created (not on subsequent visits).
-                   function(state: cp.State)
-        {code}     (function, optional) Called after the source buffer is
-                   opened for the first time (guarded by cp_setup_done).
-                   function(state: cp.State)
-        {io}       (|cp.CpSetupIOHooks|, optional) I/O buffer hooks.
-
-                                                           *cp.CpSetupIOHooks*
-    Fields: ~
-        {input}   (function, optional) Called when the I/O input buffer is
-                  created. function(bufnr: integer, state: cp.State)
-                  Default: helpers.clearcol
-        {output}  (function, optional) Called when the I/O output buffer is
-                  created. function(bufnr: integer, state: cp.State)
-                  Default: helpers.clearcol
-
-                                                               *cp.CpOnHooks*
-    Fields: ~
-        {enter}  (function, optional) Called on every BufEnter on the
-                 solution buffer. Registered as a buffer-scoped autocmd and
-                 fired immediately after setup.code.
-                 function(state: cp.State)
-        {run}    (function, optional) Called before the test panel opens.
-                 function(state: cp.State)
-        {debug}  (function, optional) Called before a debug run.
-                 function(state: cp.State)
-
-    All hook functions receive the cp.nvim state object (|cp.State|). See
+    Hook functions receive the cp.nvim state object (|cp.State|). See
     |lua/cp/state.lua| for available methods and fields.
 
+    The I/O buffer hooks are called once when the buffers are first created
+    during problem setup. Use these to customize buffer appearance (e.g.,
+    remove line numbers, set custom options). Access helpers via:
+>lua
+        local helpers = require('cp').helpers
+<
     Example usage:
 >lua
         hooks = {
-          setup = {
-            contest = function(state)
-              local dir = vim.fn.fnamemodify(
-                state.get_source_file(state.get_language()), ':h')
-              vim.fn.system({ 'cp', '~/.clang-format', dir .. '/.clang-format' })
-            end,
-            code = function(state)
-              vim.opt_local.foldmethod = 'marker'
-              vim.diagnostic.enable(false)
-            end,
-          },
-          on = {
-            enter = function(state) vim.opt_local.winbar = '' end,
-            run   = function(state) require('config.lsp').format() end,
-          },
+          setup_code = function(state)
+            print("Setting up " .. state.get_base_name())
+            print("Source file: " .. state.get_source_file())
+          end,
+          setup_io_input = function(bufnr, state)
+            -- Custom setup for input buffer
+            vim.api.nvim_set_option_value('number', false, { buf = bufnr })
+          end
         }
 <
 
-==============================================================================
-COMMANDS                                                         *cp-commands*
-
-:CP                                                                      *:CP*
-        cp.nvim uses a single :CP command with intelligent argument parsing:
-
-        Setup Commands ~
-            :CP {platform} {contest_id} [--lang {language}]
-                                Full setup: set platform and load contest metadata.
-                                Scrapes test cases and creates source file.
-                                --lang: Use specific language (default: platform default)
-                                Examples: >
-                                    :CP codeforces 1933
-                                    :CP codeforces 1933 --lang python
-<
-        View Commands ~
-            :CP run [all|n|n,m,...] [--debug]
-                                Run tests in I/O view (see |cp-io-view|).
-                                Lightweight split showing test verdicts.
-
-                                Execution modes:
-                                • :CP run              Combined: single execution with all tests
-                                                       (auto-switches to individual when multiple samples)
-                                • :CP run all          Individual: N separate executions
-                                • :CP run n            Individual: run test n only
-                                • :CP run n,m,...      Individual: run specific tests (e.g. nth and mth)
-
-                                --debug: Use debug build (builds to build/<name>.dbg)
-
-                                Combined mode runs all test inputs in one execution (matching
-                                platform behavior for multi-test problems). When a problem has
-                                multiple independent sample test cases, :CP run auto-switches to
-                                individual mode to run each sample separately.
-
-                                Examples: >
-                                    :CP run              " Combined: all tests, one execution
-                                    :CP run all          " Individual: all tests, N executions
-                                    :CP run 2            " Individual: test 2 only
-                                    :CP run 1,3,5        " Individual: tests 1, 3, and 5
-                                    :CP run all --debug  " Individual with debug build
-<
-            :CP panel [--debug] [n]
-                                Open full-screen test panel (see |cp-panel|).
-                                Aggregate table with diff modes for detailed analysis.
-                                Optional [n] focuses on specific test.
-                                --debug: Use debug build (with sanitizers, etc.)
-                                Examples: >
-                                    :CP panel            " All tests
-                                    :CP panel --debug 3  " Test 3, debug build
-<
-
-            :CP pick [--lang {language}]
-                                Launch configured picker for interactive
-                                platform/contest selection.
-                                --lang: Pre-select language for chosen contest.
-                                Example: >
-                                    :CP pick
-                                    :CP pick --lang python
-<
-
-            :CP interact [script]
-                                Open an interactive terminal for the current problem.
-                                If an executable interactor is provided, runs the compiled
-                                binary against the source file (see
-                                *cp-interact*). Otherwise, runs the source
-                                file. Only valid for interactive problems.
-
-            :CP stress [generator] [brute]
-                                Start an automated stress test loop against a
-                                brute-force reference. Toggles off if already
-                                running. Without arguments, auto-detects a
-                                generator and brute script in the working
-                                directory. See |cp-stress|.
-
-        Navigation Commands ~
-            :CP next [--lang {language}]
-                                Navigate to next problem in current contest.
-                                Stops at last problem (no wrapping).
-                                --lang: Use specific language for next problem.
-                                By default, preserves current file's language if
-                                enabled for the new problem, otherwise uses platform
-                                default.
-                                Examples: >
-                                    :CP next
-                                    :CP next --lang python
-<
-            :CP prev [--lang {language}]
-                                Navigate to previous problem in current contest.
-                                Stops at first problem (no wrapping).
-                                --lang: Use specific language for previous problem.
-                                By default, preserves current file's language if
-                                enabled for the new problem, otherwise uses platform
-                                default.
-                                Examples: >
-                                    :CP prev
-                                    :CP prev --lang cpp
-<
-            :CP {problem_id} [--lang {language}]
-                                Jump to problem {problem_id} in a contest.
-                                Requires that a contest has already been set up.
-                                --lang: Use specific language for this problem.
-                                Examples: >
-                                    :CP B
-                                    :CP C --lang python
-<
-
-        Edit Commands ~
-            :CP edit [n]
-                                Open grid test editor showing all test cases.
-                                Tests displayed as 2×N grid (2 rows, N columns):
-                                • Top row: Test inputs (editable)
-                                • Bottom row: Expected outputs (editable)
-
-                                Optional [n]: Jump cursor to test n's input buffer
-
-                                Changes saved to both cache and disk on exit,
-                                taking effect immediately in :CP run and CLI.
-
-                                Keybindings (configurable via |EditConfig|):
-                                  q         Save all and exit editor
-                                  ]t        Jump to next test column
-                                  [t        Jump to previous test column
-                                  gd        Delete current test column
-                                  ga        Add new test column at end
-                                  <c-w>     Normal window navigation
-
-                                Examples: >
-                                    :CP edit        " Edit all tests
-                                    :CP edit 3      " Edit all, start at test 3
-<
-
-        Race Commands ~
-            :CP race {platform} {contest_id} [--lang {language}]
-                                Start a countdown to the contest's scheduled
-                                start time. At T=0, automatically runs:
-                                    :CP {platform} {contest_id} [--lang ...]
-                                Examples: >
-                                    :CP race atcoder abc400
-                                    :CP race codeforces 2100 --lang python
-<
-            :CP race stop
-                                Cancel an active race countdown.
-
-        Credential Commands ~
-            :CP credentials set [platform]
-                                Set or update stored credentials for a platform.
-                                Always prompts for username and password,
-                                overwriting any previously saved credentials.
-                                If [platform] is omitted, uses the active platform.
-                                Examples: >
-                                    :CP credentials set atcoder
-                                    :CP credentials set codeforces
-<
-            :CP credentials clear [platform]
-                                Remove stored credentials. Without [platform],
-                                clears credentials for all platforms.
-                                Examples: >
-                                    :CP credentials clear atcoder
-                                    :CP credentials clear
-<
-        Submit Commands ~
-            :CP submit [--lang {language}]
-                                Submit the current solution to the online
-                                judge. Uses stored credentials (set via
-                                :CP credentials set). Prompts on first use
-                                if no credentials are saved.
-                                --lang: Submit solution for a specific language.
-
-        State Restoration ~
-            :CP                 Restore state from current file.
-                                Automatically detects platform, contest, problem,
-                                and language from cached state. Use this after
-                                switching files to restore your CP environment.
-
-        Cache Commands ~
-            :CP cache clear [platform] [contest]
-                                Clear cache data at different granularities:
-                                • No args: Clear all cached data
-                                • [platform]: Clear all data for a platform
-                                • [platform] [contest]: Clear specific contest
-                                Examples: >
-                                    :CP cache clear
-                                    :CP cache clear codeforces
-                                    :CP cache clear codeforces 1848
-<
-            :CP cache read
-                                View the cache in a pretty-printed lua buffer.
-                                Exit with q.
-
-Template Variables ~
-                                                            *cp-template-vars*
-    Command templates support variable substitution using {variable} syntax:
-
-    • {source}      Source file path (e.g. "abc324a.cpp")
-    • {binary}      Output binary path (e.g. "build/abc324a.run" or
-                    "build/abc324a.dbg" for debug builds)
-
-    Example template: >
-        build = { 'g++', '{source}', '-o', '{binary}', '-std=c++17' }
-<    Would expand to: >
-        g++ abc324a.cpp -o build/abc324a.run -std=c++17
-<
-Debug Builds ~
-                                                            *cp-debug-builds*
-    The --debug flag uses the debug command configuration instead of build:
-
-    • Normal build:  commands.build → outputs to build/<name>.run
-    • Debug build:   commands.debug → outputs to build/<name>.dbg
-
-    Debug builds typically include sanitizers (address, undefined behavior) to
-    catch memory errors, buffer overflows, and other issues. Both binaries
-    coexist, so you can switch between normal and debug mode without
-    recompiling.
-
-    Example debug configuration: >
-        languages = {
-          cpp = {
-            extension = 'cc',
-            commands = {
-              build = { 'g++', '-std=c++17', '{source}', '-o', '{binary}' },
-              run   = { '{binary}' },
-              debug = { 'g++', '-std=c++17', '-fsanitize=address,undefined',
-                        '{source}', '-o', '{binary}' },
-            }
-          }
-        }
-<
-
-==============================================================================
-MAPPINGS                                                        *cp-mappings*
-
-cp.nvim provides <Plug> mappings for all primary actions. These dispatch
-through the same code path as |:CP|.
-
-                                                              *<Plug>(cp-run)*
-<Plug>(cp-run)          Run tests in I/O view. Equivalent to :CP run.
-
-                                                            *<Plug>(cp-panel)*
-<Plug>(cp-panel)        Open full-screen test panel. Equivalent to :CP panel.
-
-                                                             *<Plug>(cp-edit)*
-<Plug>(cp-edit)         Open the test case editor. Equivalent to :CP edit.
-
-                                                             *<Plug>(cp-next)*
-<Plug>(cp-next)         Navigate to the next problem. Equivalent to :CP next.
-
-                                                             *<Plug>(cp-prev)*
-<Plug>(cp-prev)         Navigate to the previous problem. Equivalent to :CP prev.
-
-                                                             *<Plug>(cp-pick)*
-<Plug>(cp-pick)         Launch the contest picker. Equivalent to :CP pick.
-
-                                                         *<Plug>(cp-interact)*
-<Plug>(cp-interact)     Open interactive mode. Equivalent to :CP interact.
-
-                                                           *<Plug>(cp-stress)*
-<Plug>(cp-stress)       Run stress test loop. Equivalent to :CP stress.
-
-                                                           *<Plug>(cp-submit)*
-<Plug>(cp-submit)       Submit current solution. Equivalent to :CP submit.
-
-                                                        *<Plug>(cp-race-stop)*
-<Plug>(cp-race-stop)    Cancel active race countdown. Equivalent to :CP race stop.
-
-Example configuration: >lua
-    vim.keymap.set('n', '<leader>cr', '<Plug>(cp-run)')
-    vim.keymap.set('n', '<leader>cp', '<Plug>(cp-panel)')
-    vim.keymap.set('n', '<leader>ce', '<Plug>(cp-edit)')
-    vim.keymap.set('n', '<leader>cn', '<Plug>(cp-next)')
-    vim.keymap.set('n', '<leader>cN', '<Plug>(cp-prev)')
-    vim.keymap.set('n', '<leader>cc', '<Plug>(cp-pick)')
-    vim.keymap.set('n', '<leader>ci', '<Plug>(cp-interact)')
-    vim.keymap.set('n', '<leader>cs', '<Plug>(cp-stress)')
-    vim.keymap.set('n', '<leader>cu', '<Plug>(cp-submit)')
-    vim.keymap.set('n', '<leader>cR', '<Plug>(cp-race-stop)')
-<
-
 ==============================================================================
 LANGUAGE SELECTION                                           *cp-lang-selection*
 
@@ -643,41 +508,6 @@ URL format: https://cses.fi/problemset/task/{problem_id}
 Usage examples: >
     :CP cses dynamic_programming  " Set up all problems in dp category
 
-CodeChef ~
-                                                               *cp-codechef*
-URL format: https://www.codechef.com/{contest_id}/problems/{problem_id}
-
-The contest_id is the contest code from the URL (e.g. START209).
-
-Usage examples: >
-    :CP codechef START209         " Set up codechef.com/START209
-
-USACO ~
-                                                                    *cp-usaco*
-URL format: https://usaco.org/index.php?page=viewproblem2&cpid={cpid}
-
-The contest_id combines the abbreviated month, two-digit year, and division
-in lowercase, joined by underscores (e.g. dec24_gold, feb23_silver).
-
-Usage examples: >
-    :CP usaco dec24_gold          " Set up December 2024 Gold division
-    :CP usaco feb23_silver        " Set up February 2023 Silver division
-
-Kattis ~
-                                                                   *cp-kattis*
-Kattis supports single-problem and full-contest modes.
-
-Single problem — the contest_id is the problem slug from the URL:
-URL format: https://open.kattis.com/problems/{slug}
-
-Full contest — the contest_id is the contest ID from the URL. All problems
-are set up at once with :CP next/:CP prev navigation:
-URL format: https://open.kattis.com/contests/{id}
-
-Usage examples: >
-    :CP kattis primesieve         " Single problem
-    :CP kattis t8tnpe             " Full contest (all problems, A–H navigation)
-
 ==============================================================================
 
 COMPLETE WORKFLOW EXAMPLE                                         *cp-example*
@@ -712,9 +542,7 @@ Example: Setting up and solving AtCoder contest ABC324
     :CP
 <   Automatically restores abc323 contest context
 
-8. Submit solution: >
-    :CP submit
-<   Prompts for credentials on first use and submits to AtCoder.
+8. Submit solutions on AtCoder website
 
 ==============================================================================
 I/O VIEW                                                          *cp-io-view*
@@ -784,9 +612,9 @@ While in the I/O view buffers, use the configured keymaps to cycle through tests
 
 Buffer Customization ~
 
-Use the hooks.setup.io.input and hooks.setup.io.output hooks (see |cp.Hooks|)
-to customize buffer appearance. By default, line numbers and columns are
-removed via helpers.clearcol (see |cp-helpers|).
+Use the setup_io_input and setup_io_output hooks (see |cp.Hooks|) to customize
+buffer appearance. By default, line numbers and columns are removed via
+helpers.clearcol (see |cp-helpers|).
 
 ==============================================================================
 VERDICT FORMATTING                                           *cp-verdict-format*
@@ -925,72 +753,6 @@ When using :CP interact {interactor}, the interactor must be executable
 Keymaps ~
     <c-q>   Close the terminal and restore the previous layout.
 
-==============================================================================
-STRESS TESTING                                                     *cp-stress*
-
-Start an automated stress test loop to find inputs where your solution
-disagrees with a brute-force reference.
-
-:CP stress [generator] [brute]
-        Start the stress loop. Toggles off if the loop is already running.
-        {generator}     Generator script path (default: auto-detected).
-        {brute}         Brute-force solution path (default: auto-detected).
-        Auto-detection looks for files named gen.* and brute.* in the CWD.
-
-        The stress panel opens and streams results for each iteration.
-        On a mismatch, the failing input is displayed in the panel.
-
-Keymaps ~
-    <c-q>   Close the stress panel and restore the previous layout.
-
-==============================================================================
-RACE                                                                  *cp-race*
-
-Count down to a contest's start time and automatically run setup at T=0.
-
-:CP race {platform} {contest_id} [--lang {language}]
-        Start a countdown timer. At T=0, automatically runs:
-            :CP {platform} {contest_id} [--lang {language}]
-        Examples: >
-            :CP race atcoder abc400
-            :CP race codeforces 2100 --lang python
-<
-:CP race stop
-        Cancel an active race countdown.
-
-Statusline integration: see |cp-race-status|.
-
-==============================================================================
-CREDENTIALS                                                       *cp-credentials*
-
-Manage stored login credentials for platform submission.
-
-Credentials are stored under _credentials in the main cache file
-(stdpath('data')/cp-nvim.json). Use :CP cache read to inspect them.
-
-:CP credentials set [platform]
-        Set or update credentials for a platform. Always prompts for
-        username and password, overwriting any previously saved values.
-        Omit [platform] to use the currently active platform.
-
-:CP credentials clear [platform]
-        Remove stored credentials. Without [platform], clears all platforms.
-
-==============================================================================
-SUBMIT                                                               *cp-submit*
-
-Submit the current solution to the online judge.
-
-:CP submit [--lang {language}]
-        Submit the current solution. Uses stored credentials (set via
-        :CP credentials set). Prompts on first use if no credentials
-        are saved.
-        --lang: Override the language to submit.
-
-        Platform support:
-            AtCoder     Fully implemented.
-            Others      Not yet implemented.
-
 ==============================================================================
 ANSI COLORS AND HIGHLIGHTING                                         *cp-ansi*
 
@@ -1081,124 +843,6 @@ Functions ~
         Parameters: ~
             {bufnr}  (integer) Buffer handle
 
-==============================================================================
-STATUSLINE INTEGRATION                                        *cp-statusline*
-
-cp.nvim exposes its runtime state through a public module that can be queried
-from any statusline plugin. Import it with: >lua
-    local state = require('cp.state')
-<
-All getters return nil when no problem is active, so guard every value before
-use. Calling any getter outside a CP context is safe and has no side effects.
-
-State API ~
-                                                                  *cp.State*
-The following getters are available for statusline use:
-
-    get_platform()      (string?) Platform id. e.g. "codeforces", "atcoder"
-    get_contest_id()    (string?) Contest id. e.g. "1933", "abc324"
-    get_problem_id()    (string?) Problem id. e.g. "A", "B"
-    get_language()      (string?) Language id. e.g. "cpp", "python"
-    get_base_name()     (string?) Derived filename stem. e.g. "1933a"
-    get_source_file()   (string?) Full source filename. e.g. "1933a.cc"
-    get_active_panel()  (string?) One of 'run', 'interactive', 'stress', or
-                        nil when no panel is open.
-
-Race API ~
-                                                               *cp-race-status*
-    require('cp.race').status() returns a table describing the race state:
-        { active = false }
-        { active = true, platform = string, contest_id = string,
-          remaining_seconds = number }
-
-Recipe: vanilla statusline ~
-
-Set vim.o.statusline from an autocommand so it is recalculated on every
-BufEnter: >lua
-    local function cp_component()
-      local state = require('cp.state')
-      local platform = state.get_platform()
-      if not platform then
-        return ''
-      end
-      local parts = {
-        platform,
-        state.get_contest_id(),
-        state.get_problem_id(),
-        state.get_language(),
-      }
-      local filtered = {}
-      for _, v in ipairs(parts) do
-        if v then filtered[#filtered + 1] = v end
-      end
-      return '[' .. table.concat(filtered, ' · ') .. ']'
-    end
-
-    vim.api.nvim_create_autocmd({ 'BufEnter', 'User' }, {
-      callback = function()
-        vim.o.statusline = cp_component() .. ' %f %=%l:%c'
-      end
-    })
-<
-
-Recipe: lualine ~
-
-Add a custom component to any lualine section. The cond field hides the
-component entirely when no problem is active: >lua
-    local function cp_lualine()
-      local state = require('cp.state')
-      local parts = {
-        state.get_platform(),
-        state.get_contest_id(),
-        state.get_problem_id(),
-        state.get_language(),
-      }
-      local filtered = {}
-      for _, v in ipairs(parts) do
-        if v then filtered[#filtered + 1] = v end
-      end
-      return table.concat(filtered, ' · ')
-    end
-
-    require('lualine').setup({
-      sections = {
-        lualine_c = {
-          {
-            cp_lualine,
-            cond = function()
-              return require('cp.state').get_platform() ~= nil
-            end,
-          },
-        },
-      },
-    })
-<
-
-Recipe: heirline ~
-
-Build a heirline component using a provider and condition: >lua
-    local CpComponent = {
-      condition = function()
-        return require('cp.state').get_platform() ~= nil
-      end,
-      provider = function()
-        local state = require('cp.state')
-        local parts = {
-          state.get_platform(),
-          state.get_contest_id(),
-          state.get_problem_id(),
-          state.get_language(),
-        }
-        local filtered = {}
-        for _, v in ipairs(parts) do
-          if v then filtered[#filtered + 1] = v end
-        end
-        return '[' .. table.concat(filtered, ' · ') .. ']'
-      end,
-    }
-<
-Include CpComponent in your heirline StatusLine spec wherever desired.
-
 ==============================================================================
 PANEL KEYMAPS                                                  *cp-panel-keys*
 

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

@@ -1,76 +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.${system};
-
-      mkPythonEnv =
-        pkgs:
-        pkgs.python312.withPackages (ps: [
-          ps.backoff
-          ps.beautifulsoup4
-          ps.curl-cffi
-          ps.httpx
-          ps.ndjson
-          ps.pydantic
-          ps.requests
-        ]);
-
-      mkPlugin =
-        pkgs:
-        let
-          pythonEnv = mkPythonEnv pkgs;
-        in
-        pkgs.vimUtils.buildVimPlugin {
-          pname = "cp-nvim";
-          version = "0-unstable-${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}'"
-          '';
-          nvimSkipModule = [
-            "cp.pickers.telescope"
-            "cp.version"
-          ];
-          passthru = { inherit pythonEnv; };
-          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);
-      });
-
-      devShells = eachSystem (system: {
-        default = (pkgsFor system).mkShell {
-          packages = with (pkgsFor system); [
-            uv
-            python312
-            prettier
-            stylua
-            selene
-            lua-language-server
-          ];
-        };
-      });
-    };
-}

lua/cp/cache.lua

@@ -15,7 +15,6 @@
 ---@field display_name string
 ---@field name string
 ---@field id string
----@field start_time? integer
 
 ---@class CombinedTest
 ---@field input string
@@ -28,7 +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[]
 
@@ -40,8 +38,7 @@
 
 local M = {}
 
-local CACHE_VERSION = 1
-
+local logger = require('cp.log')
 local cache_file = vim.fn.stdpath('data') .. '/cp-nvim.json'
 local cache_data = {}
 local loaded = false
@@ -68,15 +65,9 @@ function M.load()
 
   local ok, decoded = pcall(vim.json.decode, table.concat(content, '\n'))
   if ok then
-    if decoded._version ~= CACHE_VERSION then
-      cache_data = {}
-      M.save()
-    else
-      cache_data = decoded
-    end
+    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
@@ -87,7 +78,6 @@ function M.save()
   vim.schedule(function()
     vim.fn.mkdir(vim.fn.fnamemodify(cache_file, ':h'), 'p')
 
-    cache_data._version = CACHE_VERSION
     local encoded = vim.json.encode(cache_data)
     local lines = vim.split(encoded, '\n')
     vim.fn.writefile(lines, cache_file)
@@ -232,8 +222,7 @@ function M.set_test_cases(
   timeout_ms,
   memory_mb,
   interactive,
-  multi_test,
-  precision
+  multi_test
 )
   vim.validate({
     platform = { platform, 'string' },
@@ -245,7 +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]
@@ -256,7 +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
@@ -278,34 +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)
@@ -353,59 +312,13 @@ function M.set_contest_summaries(platform, contests)
     cache_data[platform][contest.id] = cache_data[platform][contest.id] or {}
     cache_data[platform][contest.id].display_name = contest.display_name
     cache_data[platform][contest.id].name = contest.name
-    if contest.start_time then
-      cache_data[platform][contest.id].start_time = contest.start_time
-    end
   end
 
   M.save()
 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
----@return table?
-function M.get_credentials(platform)
-  if not cache_data._credentials then
-    return nil
-  end
-  return cache_data._credentials[platform]
-end
-
----@param platform string
----@param creds table
-function M.set_credentials(platform, creds)
-  cache_data._credentials = cache_data._credentials or {}
-  cache_data._credentials[platform] = creds
-  M.save()
-end
-
----@param platform string?
-function M.clear_credentials(platform)
-  if platform then
-    if cache_data._credentials then
-      cache_data._credentials[platform] = nil
-    end
-  else
-    cache_data._credentials = nil
-  end
-  M.save()
-end
-
 function M.clear_all()
-  local creds = cache_data._credentials
   cache_data = {}
-  if creds then
-    cache_data._credentials = creds
-  end
   M.save()
 end
 
@@ -425,8 +338,6 @@ function M.get_data_pretty()
   return vim.inspect(cache_data)
 end
 
-function M.get_raw_cache()
-  return cache_data
-end
+M._cache = cache_data
 
 return M

lua/cp/commands/init.lua

@@ -16,8 +16,6 @@ local actions = constants.ACTIONS
 ---@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
@@ -55,27 +53,6 @@ local function parse_command(args)
       else
         return { type = 'error', message = 'unknown cache subcommand: ' .. subcommand }
       end
-    elseif first == 'race' then
-      if args[2] == 'stop' then
-        return { type = 'action', action = 'race_stop' }
-      end
-      if not args[2] or not args[3] then
-        return {
-          type = 'error',
-          message = 'Usage: :CP race <platform> <contest_id> [--lang <lang>]',
-        }
-      end
-      local language = nil
-      if args[4] == '--lang' and args[5] then
-        language = args[5]
-      end
-      return {
-        type = 'action',
-        action = 'race',
-        platform = args[2],
-        contest = args[3],
-        language = language,
-      }
     elseif first == 'interact' then
       local inter = args[2]
       if inter and inter ~= '' then
@@ -83,27 +60,6 @@ local function parse_command(args)
       else
         return { type = 'action', action = 'interact' }
       end
-    elseif first == 'credentials' then
-      local subcommand = args[2]
-      if not subcommand then
-        return { type = 'error', message = 'credentials command requires subcommand (set, clear)' }
-      end
-      if vim.tbl_contains({ 'set', 'clear' }, subcommand) then
-        return {
-          type = 'credentials',
-          subcommand = subcommand,
-          platform = args[3],
-        }
-      else
-        return { type = 'error', message = 'unknown credentials subcommand: ' .. subcommand }
-      end
-    elseif first == 'stress' then
-      return {
-        type = 'action',
-        action = 'stress',
-        generator_cmd = args[2],
-        brute_cmd = args[3],
-      }
     elseif first == 'edit' then
       local test_index = nil
       if #args >= 2 then
@@ -329,14 +285,6 @@ function M.handle_command(opts)
     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 == 'race' then
-      require('cp.race').start(cmd.platform, cmd.contest, cmd.language)
-    elseif cmd.action == 'race_stop' then
-      require('cp.race').stop()
     end
   elseif cmd.type == 'problem_jump' then
     local platform = state.get_platform()
@@ -366,13 +314,6 @@ function M.handle_command(opts)
 
     local setup = require('cp.setup')
     setup.setup_contest(platform, contest_id, problem_id, cmd.language)
-  elseif cmd.type == 'credentials' then
-    local creds = require('cp.credentials')
-    if cmd.subcommand == 'set' then
-      creds.set(cmd.platform)
-    elseif cmd.subcommand == 'clear' then
-      creds.clear(cmd.platform)
-    end
   elseif cmd.type == 'cache' then
     local cache_commands = require('cp.commands.cache')
     cache_commands.handle_cache_command(cmd)

lua/cp/config.lua

@@ -7,15 +7,10 @@
 ---@class CpLanguage
 ---@field extension string
 ---@field commands CpLangCommands
----@field template? string
-
----@class CpTemplatesConfig
----@field cursor_marker? string
 
 ---@class CpPlatformOverrides
 ---@field extension? string
 ---@field commands? CpLangCommands
----@field template? string
 
 ---@class CpPlatform
 ---@field enabled_languages string[]
@@ -25,7 +20,6 @@
 ---@class PanelConfig
 ---@field diff_modes string[]
 ---@field max_output_lines integer
----@field precision number?
 
 ---@class DiffGitConfig
 ---@field args string[]
@@ -33,23 +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
@@ -78,6 +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
@@ -98,7 +83,6 @@
 ---@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
@@ -163,29 +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,
@@ -194,6 +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 = {
@@ -203,11 +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' },
@@ -249,10 +215,6 @@ 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
@@ -291,9 +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
   return out
 end
 
@@ -333,15 +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 in pairs(defaults.platforms) do
-      if not user_config.platforms[plat] then
-        defaults.platforms[plat] = nil
-      end
-    end
-  end
-  local cfg = vim.tbl_deep_extend('force', defaults, user_config or {})
+  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')
@@ -351,13 +302,6 @@ 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' } },
@@ -379,29 +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({
@@ -428,13 +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 = {
@@ -444,6 +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',

lua/cp/constants.lua

@@ -1,28 +1,13 @@
 local M = {}
 
-M.PLATFORMS = { 'atcoder', 'codechef', 'codeforces', 'cses', 'kattis', 'usaco' }
-M.ACTIONS = {
-  'run',
-  'panel',
-  'next',
-  'prev',
-  'pick',
-  'cache',
-  'interact',
-  'edit',
-  'race',
-  'stress',
-  'submit',
-  'credentials',
-}
+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.CPP = 'cpp'

lua/cp/credentials.lua

@@ -1,42 +0,0 @@
-local M = {}
-
-local cache = require('cp.cache')
-local logger = require('cp.log')
-local state = require('cp.state')
-
-function M.set(platform)
-  platform = platform or state.get_platform()
-  if not platform then
-    logger.log('No platform specified. Usage: :CP credentials set <platform>', vim.log.levels.ERROR)
-    return
-  end
-
-  vim.ui.input({ prompt = platform .. ' username: ' }, function(username)
-    if not username or username == '' then
-      logger.log('Cancelled', vim.log.levels.WARN)
-      return
-    end
-    vim.fn.inputsave()
-    local password = vim.fn.inputsecret(platform .. ' password: ')
-    vim.fn.inputrestore()
-    if not password or password == '' then
-      logger.log('Cancelled', vim.log.levels.WARN)
-      return
-    end
-    cache.load()
-    cache.set_credentials(platform, { username = username, password = password })
-    logger.log(platform .. ' credentials saved', vim.log.levels.INFO, true)
-  end)
-end
-
-function M.clear(platform)
-  cache.load()
-  cache.clear_credentials(platform)
-  if platform then
-    logger.log(platform .. ' credentials cleared', vim.log.levels.INFO, true)
-  else
-    logger.log('all credentials cleared', vim.log.levels.INFO, true)
-  end
-end
-
-return M

lua/cp/health.lua

@@ -5,50 +5,33 @@ local utils = require('cp.utils')
 local function check()
   vim.health.start('cp.nvim [required] ~')
 
-  utils.setup_python_env()
-
   if vim.fn.has('nvim-0.10.0') == 1 then
     vim.health.ok('Neovim 0.10.0+ detected')
   else
     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 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 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('Python version: ' .. r.stdout:gsub('\n', ''))
+      vim.health.info('uv 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
+    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
+  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()
@@ -58,7 +41,7 @@ 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

lua/cp/init.lua

@@ -15,25 +15,17 @@ 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+: ', '')
-    vim.notify(msg, vim.log.levels.ERROR)
-    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
@@ -42,13 +34,4 @@ function M.is_initialized()
   return initialized
 end
 
----@deprecated Use `vim.g.cp` instead
-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/race.lua

@@ -1,144 +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 race_state = {
-  timer = nil,
-  platform = nil,
-  contest_id = nil,
-  language = nil,
-  start_time = nil,
-}
-
-local function format_countdown(seconds)
-  local h = math.floor(seconds / 3600)
-  local m = math.floor((seconds % 3600) / 60)
-  local s = seconds % 60
-  return string.format('%02d:%02d:%02d', h, m, s)
-end
-
-function M.start(platform, contest_id, language)
-  if not platform or not vim.tbl_contains(constants.PLATFORMS, platform) then
-    logger.log('Invalid platform', vim.log.levels.ERROR)
-    return
-  end
-  if not contest_id or contest_id == '' then
-    logger.log('Contest ID required', vim.log.levels.ERROR)
-    return
-  end
-  if race_state.timer then
-    logger.log('Race already active. Use :CP race stop first.', vim.log.levels.WARN)
-    return
-  end
-
-  cache.load()
-  local start_time = cache.get_contest_start_time(platform, contest_id)
-
-  if not start_time then
-    logger.log('Fetching contest list...', vim.log.levels.INFO, true)
-    local contests = scraper.scrape_contest_list(platform)
-    if contests and #contests > 0 then
-      cache.set_contest_summaries(platform, contests)
-      start_time = cache.get_contest_start_time(platform, contest_id)
-    end
-  end
-
-  if not start_time then
-    logger.log(
-      ('No start time found for %s contest %s'):format(
-        constants.PLATFORM_DISPLAY_NAMES[platform] or platform,
-        contest_id
-      ),
-      vim.log.levels.ERROR
-    )
-    return
-  end
-
-  local remaining = start_time - os.time()
-  if remaining <= 0 then
-    logger.log('Contest has already started, setting up...', vim.log.levels.INFO, true)
-    require('cp.setup').setup_contest(platform, contest_id, nil, language)
-    return
-  end
-
-  race_state.platform = platform
-  race_state.contest_id = contest_id
-  race_state.language = language
-  race_state.start_time = start_time
-
-  logger.log(
-    ('Race started for %s %s — %s remaining'):format(
-      constants.PLATFORM_DISPLAY_NAMES[platform] or platform,
-      contest_id,
-      format_countdown(remaining)
-    ),
-    vim.log.levels.INFO,
-    true
-  )
-
-  local timer = vim.uv.new_timer()
-  race_state.timer = timer
-  timer:start(
-    1000,
-    1000,
-    vim.schedule_wrap(function()
-      local r = race_state.start_time - os.time()
-      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.language = nil
-        race_state.start_time = nil
-        logger.log('Contest started!', vim.log.levels.INFO, true)
-        require('cp.setup').setup_contest(p, c, nil, l)
-      else
-        vim.notify(
-          ('[cp.nvim] %s %s — %s'):format(
-            constants.PLATFORM_DISPLAY_NAMES[race_state.platform] or race_state.platform,
-            race_state.contest_id,
-            format_countdown(r)
-          ),
-          vim.log.levels.INFO
-        )
-      end
-    end)
-  )
-end
-
-function M.stop()
-  local timer = race_state.timer
-  if not timer then
-    logger.log('No active race', vim.log.levels.WARN)
-    return
-  end
-  timer:stop()
-  timer:close()
-  race_state.timer = nil
-  race_state.platform = nil
-  race_state.contest_id = nil
-  race_state.language = nil
-  race_state.start_time = nil
-  logger.log('Race cancelled', vim.log.levels.INFO, true)
-end
-
-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/runner/execute.lua

@@ -43,7 +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)
@@ -120,7 +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
@@ -327,35 +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),
-      vim.log.levels.INFO,
-      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),
-          vim.log.levels.INFO,
-          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/scraper.lua

@@ -20,81 +20,52 @@ local function syshandle(result)
   return { success = true, data = data }
 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)
-  end
-  return out
-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, 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 plugin_path = utils.get_plugin_path()
-  local cmd = utils.get_python_cmd(platform, plugin_path)
-  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 opts and opts.ndjson then
-    local uv = vim.uv
+    local uv = vim.loop
     local stdout = uv.new_pipe(false)
     local stderr = uv.new_pipe(false)
     local buf = ''
 
     local handle
-    handle = uv.spawn(cmd[1], {
-      args = vim.list_slice(cmd, 2),
-      stdio = { nil, stdout, stderr },
-      env = spawn_env_list(env),
-      cwd = plugin_path,
-    }, 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)
+    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
+        if opts.on_exit then
+          opts.on_exit({ success = (code == 0), code = code, signal = signal })
+        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
-        buf = ''
       end
-      if opts.on_exit then
-        opts.on_exit({ success = (code == 0), code = code, signal = signal })
-      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
       logger.log('Failed to start scraper process', vim.log.levels.ERROR)
@@ -131,10 +102,7 @@ local function run_scraper(platform, subcommand, args, opts)
     return
   end
 
-  local sysopts = { text = true, timeout = 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)
@@ -237,7 +205,6 @@ function M.scrape_all_tests(platform, contest_id, callback)
             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
@@ -246,21 +213,4 @@ function M.scrape_all_tests(platform, contest_id, callback)
   })
 end
 
-function M.submit(platform, contest_id, problem_id, language, source_code, credentials, callback)
-  local creds_json = vim.json.encode(credentials)
-  run_scraper(platform, 'submit', { contest_id, problem_id, language }, {
-    stdin = source_code,
-    env_extra = { CP_CREDENTIALS = creds_json },
-    on_exit = function(result)
-      if type(callback) == 'function' then
-        if result and result.success then
-          callback(result.data or { success = true })
-        else
-          callback({ success = false, error = result and result.error or 'unknown' })
-        end
-      end
-    end,
-  })
-end
-
 return M

lua/cp/setup.lua

@@ -8,36 +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), 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()
@@ -130,8 +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()
@@ -152,7 +121,6 @@ end
 ---@param language? string
 function M.setup_contest(platform, contest_id, problem_id, language)
   local old_platform, old_contest_id = state.get_platform(), state.get_contest_id()
-  local old_problem_id = state.get_problem_id()
 
   state.set_platform(platform)
   state.set_contest_id(contest_id)
@@ -165,7 +133,7 @@ function M.setup_contest(platform, contest_id, problem_id, language)
     end
   end
 
-  local is_new_contest = old_platform ~= platform or old_contest_id ~= contest_id
+  local is_new_contest = old_platform ~= platform and old_contest_id ~= contest_id
 
   cache.load()
 
@@ -175,10 +143,7 @@ function M.setup_contest(platform, contest_id, problem_id, language)
     M.setup_problem(pid, language)
     start_tests(platform, contest_id, problems)
 
-    local is_new_problem = old_problem_id ~= pid
-    local should_open_url = config_module.get_config().open_url
-      and (is_new_contest or is_new_problem)
-    if should_open_url and contest_data.url then
+    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
@@ -195,7 +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,
@@ -203,7 +173,7 @@ 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...', vim.log.levels.INFO, true)
@@ -275,15 +245,7 @@ function M.setup_problem(problem_id, language)
     return
   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
@@ -302,29 +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'),
@@ -347,32 +294,14 @@ function M.setup_problem(problem_id, language)
   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'),

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

@@ -1,235 +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 ''),
-      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 'python3 ' .. file
-  end
-  return './' .. file
-end
-
-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)
-    return
-  end
-
-  if state.get_active_panel() then
-    logger.log('Another panel is already active.', 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}.',
-      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}.',
-      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
-  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.', 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()
-    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 M

lua/cp/submit.lua

@@ -1,74 +0,0 @@
-local M = {}
-
-local cache = require('cp.cache')
-local logger = require('cp.log')
-local state = require('cp.state')
-
-local function prompt_credentials(platform, callback)
-  local saved = cache.get_credentials(platform)
-  if saved and saved.username and saved.password then
-    callback(saved)
-    return
-  end
-  vim.ui.input({ prompt = platform .. ' username: ' }, function(username)
-    if not username or username == '' then
-      logger.log('Submit cancelled', vim.log.levels.WARN)
-      return
-    end
-    vim.fn.inputsave()
-    local password = vim.fn.inputsecret(platform .. ' password: ')
-    vim.fn.inputrestore()
-    if not password or password == '' then
-      logger.log('Submit cancelled', vim.log.levels.WARN)
-      return
-    end
-    local creds = { username = username, password = password }
-    cache.set_credentials(platform, creds)
-    callback(creds)
-  end)
-end
-
-function M.submit(opts)
-  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.', vim.log.levels.ERROR)
-    return
-  end
-
-  local source_file = state.get_source_file()
-  if not source_file or vim.fn.filereadable(source_file) ~= 1 then
-    logger.log('Source file not found', vim.log.levels.ERROR)
-    return
-  end
-
-  prompt_credentials(platform, function(creds)
-    local source_lines = vim.fn.readfile(source_file)
-    local source_code = table.concat(source_lines, '\n')
-
-    require('cp.scraper').submit(
-      platform,
-      contest_id,
-      problem_id,
-      language,
-      source_code,
-      creds,
-      function(result)
-        vim.schedule(function()
-          if result and result.success then
-            logger.log('Submitted successfully', vim.log.levels.INFO, true)
-          else
-            logger.log(
-              'Submit failed: ' .. (result and result.error or 'unknown error'),
-              vim.log.levels.ERROR
-            )
-          end
-        end)
-      end
-    )
-  end)
-end
-
-return M

lua/cp/ui/views.lua

@@ -26,8 +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
@@ -69,11 +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}.', vim.log.levels.ERROR)
+    logger.log('This problem is interactive. Use :CP interact.', vim.log.levels.ERROR)
     return
   end
 
@@ -123,22 +121,13 @@ function M.toggle_interactive(interactor_cmd)
       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
@@ -240,6 +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,
   })
 
@@ -304,6 +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
 
@@ -402,12 +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)
@@ -788,7 +821,6 @@ 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.', vim.log.levels.WARN)
@@ -917,15 +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

@@ -2,10 +2,7 @@ local M = {}
 
 local logger = require('cp.log')
 
-local _nix_python = 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
@@ -60,11 +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
 
@@ -86,103 +79,27 @@ 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
-
 local python_env_setup = false
 
----@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()
-  vim.notify('[cp.nvim] Building Python environment with nix...', vim.log.levels.INFO)
-  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 ''), 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, 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()
   if python_env_setup then
     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 .. ')')
-    vim.notify('[cp.nvim] Setting up Python environment...', vim.log.levels.INFO)
-    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 = ''
@@ -191,33 +108,14 @@ 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 ''),
-        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.',
-    vim.log.levels.WARN
-  )
-  return false
+  python_env_setup = true
+  return true
 end
 
 --- Configure the buffer with good defaults
@@ -264,12 +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('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
@@ -319,11 +225,7 @@ 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
 
@@ -338,7 +240,7 @@ function M.timeout_capability()
 end
 
 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 {}

plugin/cp.lua

@@ -66,7 +66,7 @@ end, {
         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
@@ -103,12 +103,6 @@ end, {
           end
         end
         return filter_candidates(candidates)
-      elseif args[2] == 'credentials' then
-        return filter_candidates({ 'set', 'clear' })
-      elseif args[2] == 'race' then
-        local candidates = { 'stop' }
-        vim.list_extend(candidates, platforms)
-        return filter_candidates(candidates)
       elseif args[2] == 'next' or args[2] == 'prev' or args[2] == 'pick' then
         return filter_candidates({ '--lang' })
       else
@@ -118,17 +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] == 'race' and vim.tbl_contains(platforms, args[3]) then
-        local cache = require('cp.cache')
-        cache.load()
-        local contests = cache.get_cached_contest_ids(args[3])
-        return filter_candidates(contests)
-      elseif args[2] == 'credentials' and vim.tbl_contains({ 'set', 'clear' }, args[3]) then
-        return filter_candidates(platforms)
-      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)
@@ -150,9 +134,7 @@ end, {
         return filter_candidates(candidates)
       end
     elseif num_args == 5 then
-      if args[2] == 'race' and vim.tbl_contains(platforms, args[3]) then
-        return filter_candidates({ '--lang' })
-      elseif args[2] == 'cache' and args[3] == 'clear' and vim.tbl_contains(platforms, args[4]) then
+      if args[2] == 'cache' and args[3] == 'clear' and vim.tbl_contains(platforms, args[4]) then
         local cache = require('cp.cache')
         cache.load()
         local contests = cache.get_cached_contest_ids(args[4])
@@ -165,31 +147,10 @@ end, {
         end
       end
     elseif num_args == 6 then
-      if args[2] == 'race' and vim.tbl_contains(platforms, args[3]) and args[5] == '--lang' then
-        return filter_candidates(get_enabled_languages(args[3]))
-      elseif vim.tbl_contains(platforms, args[2]) and args[5] == '--lang' then
+      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' })
-vim.keymap.set('n', '<Plug>(cp-race-stop)', function()
-  require('cp.race').stop()
-end, { desc = 'CP stop race countdown' })

pyproject.toml

@@ -12,6 +12,8 @@ dependencies = [
     "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

@@ -14,14 +14,13 @@ from bs4 import BeautifulSoup, Tag
 from requests.adapters import HTTPAdapter
 from urllib3.util.retry import Retry
 
-from .base import BaseScraper, extract_precision
+from .base import BaseScraper
 from .models import (
     CombinedTest,
     ContestListResult,
     ContestSummary,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
     TestsResult,
 )
@@ -122,23 +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")
@@ -157,10 +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
 
 
@@ -190,7 +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
@@ -202,10 +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]:
@@ -242,13 +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,
     }
 
 
@@ -264,29 +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}"))
@@ -295,10 +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
 
 
@@ -361,7 +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,
@@ -369,76 +326,6 @@ class AtcoderScraper(BaseScraper):
 
         await asyncio.gather(*(emit(r) for r in rows))
 
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        def _submit_sync() -> SubmitResult:
-            try:
-                login_page = _session.get(
-                    f"{BASE_URL}/login", headers=HEADERS, timeout=TIMEOUT_SECONDS
-                )
-                login_page.raise_for_status()
-                soup = BeautifulSoup(login_page.text, "html.parser")
-                csrf_input = soup.find("input", {"name": "csrf_token"})
-                if not csrf_input or not hasattr(csrf_input, "get"):
-                    return SubmitResult(
-                        success=False, error="Could not find CSRF token on login page"
-                    )
-                csrf_token = csrf_input.get("value", "") or ""  # type: ignore[union-attr]
-
-                login_resp = _session.post(
-                    f"{BASE_URL}/login",
-                    data={
-                        "username": credentials.get("username", ""),
-                        "password": credentials.get("password", ""),
-                        "csrf_token": csrf_token,
-                    },
-                    headers=HEADERS,
-                    timeout=TIMEOUT_SECONDS,
-                )
-                login_resp.raise_for_status()
-
-                submit_page = _session.get(
-                    f"{BASE_URL}/contests/{contest_id}/submit",
-                    headers=HEADERS,
-                    timeout=TIMEOUT_SECONDS,
-                )
-                submit_page.raise_for_status()
-                soup = BeautifulSoup(submit_page.text, "html.parser")
-                csrf_input = soup.find("input", {"name": "csrf_token"})
-                if not csrf_input or not hasattr(csrf_input, "get"):
-                    return SubmitResult(
-                        success=False, error="Could not find CSRF token on submit page"
-                    )
-                csrf_token = csrf_input.get("value", "") or ""  # type: ignore[union-attr]
-
-                task_screen_name = f"{contest_id}_{problem_id}"
-                submit_resp = _session.post(
-                    f"{BASE_URL}/contests/{contest_id}/submit",
-                    data={
-                        "data.TaskScreenName": task_screen_name,
-                        "data.LanguageId": language_id,
-                        "sourceCode": source_code,
-                        "csrf_token": csrf_token,
-                    },
-                    headers=HEADERS,
-                    timeout=TIMEOUT_SECONDS,
-                )
-                submit_resp.raise_for_status()
-
-                return SubmitResult(
-                    success=True, error="", submission_id="", verdict="submitted"
-                )
-            except Exception as e:
-                return SubmitResult(success=False, error=str(e))
-
-        return await asyncio.to_thread(_submit_sync)
-
 
 async def main_async() -> int:
     if len(sys.argv) < 2:

scrapers/base.py

@@ -1,37 +1,8 @@
 import asyncio
-import json
-import os
-import re
 import sys
 from abc import ABC, abstractmethod
 
-from .language_ids import get_language_id
-from .models import (
-    CombinedTest,
-    ContestListResult,
-    MetadataResult,
-    SubmitResult,
-    TestsResult,
-)
-
-_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):
@@ -48,16 +19,6 @@ 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,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult: ...
-
     def _usage(self) -> str:
         name = self.platform_name
         return f"Usage: {name}.py metadata <id> | tests <id> | contests"
@@ -79,9 +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)
-
     async def _run_cli_async(self, args: list[str]) -> int:
         if len(args) < 2:
             print(self._metadata_error(self._usage()).model_dump_json())
@@ -113,27 +71,6 @@ class BaseScraper(ABC):
                 print(result.model_dump_json())
                 return 0 if result.success else 1
 
-            case "submit":
-                if len(args) != 5:
-                    print(
-                        self._submit_error(
-                            "Usage: <platform> submit <contest_id> <problem_id> <language_id>"
-                        ).model_dump_json()
-                    )
-                    return 1
-                source_code = sys.stdin.read()
-                creds_raw = os.environ.get("CP_CREDENTIALS", "{}")
-                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], source_code, language_id, credentials
-                )
-                print(result.model_dump_json())
-                return 0 if result.success else 1
-
             case _:
                 print(
                     self._metadata_error(

scrapers/codechef.py

@@ -6,15 +6,14 @@ import re
 from typing import Any
 
 import httpx
-from curl_cffi import requests as curl_requests
+from scrapling.fetchers import Fetcher
 
-from .base import BaseScraper, extract_precision
+from .base import BaseScraper
 from .models import (
     ContestListResult,
     ContestSummary,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
 )
 
@@ -51,9 +50,8 @@ def _extract_memory_limit(html: str) -> float:
 
 
 def _fetch_html_sync(url: str) -> str:
-    response = curl_requests.get(url, impersonate="chrome", timeout=TIMEOUT_S)
-    response.raise_for_status()
-    return response.text
+    response = Fetcher.get(url)
+    return str(response.body)
 
 
 class CodeChefScraper(BaseScraper):
@@ -220,13 +218,11 @@ class CodeChefScraper(BaseScraper):
                         )
                         memory_mb = _extract_memory_limit(html)
                         interactive = False
-                        precision = extract_precision(html)
                     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 ""
@@ -244,7 +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()]
@@ -252,21 +247,6 @@ class CodeChefScraper(BaseScraper):
                 payload = await coro
                 print(json.dumps(payload), flush=True)
 
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return SubmitResult(
-            success=False,
-            error="CodeChef submit not yet implemented",
-            submission_id="",
-            verdict="",
-        )
-
 
 if __name__ == "__main__":
     CodeChefScraper().run_cli()

scrapers/codeforces.py

@@ -2,23 +2,27 @@
 
 import asyncio
 import json
+import logging
 import re
 from typing import Any
 
 import requests
 from bs4 import BeautifulSoup, Tag
-from curl_cffi import requests as curl_requests
+from scrapling.fetchers import Fetcher
 
-from .base import BaseScraper, extract_precision
+from .base import BaseScraper
 from .models import (
     ContestListResult,
     ContestSummary,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
 )
 
+# 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
@@ -79,7 +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] = [
@@ -136,9 +140,10 @@ def _is_interactive(block: Tag) -> bool:
 
 def _fetch_problems_html(contest_id: str) -> str:
     url = f"{BASE_URL}/contest/{contest_id}/problems"
-    response = curl_requests.get(url, impersonate="chrome", timeout=TIMEOUT_SECONDS)
-    response.raise_for_status()
-    return response.text
+    page = Fetcher.get(
+        url,
+    )
+    return page.html_content
 
 
 def _parse_all_blocks(html: str) -> list[dict[str, Any]]:
@@ -154,7 +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(
@@ -181,7 +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
@@ -231,20 +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")
@@ -275,27 +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,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return SubmitResult(
-            success=False,
-            error="Codeforces submit not yet implemented",
-            submission_id="",
-            verdict="",
-        )
-
 
 if __name__ == "__main__":
     CodeforcesScraper().run_cli()

scrapers/cses.py

@@ -7,13 +7,12 @@ from typing import Any
 
 import httpx
 
-from .base import BaseScraper, extract_precision
+from .base import BaseScraper
 from .models import (
     ContestListResult,
     ContestSummary,
     MetadataResult,
     ProblemSummary,
-    SubmitResult,
     TestCase,
 )
 
@@ -130,21 +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:
@@ -232,17 +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 = (
@@ -262,7 +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]
@@ -270,21 +257,6 @@ class CSESScraper(BaseScraper):
                 payload = await coro
                 print(json.dumps(payload), flush=True)
 
-    async def submit(
-        self,
-        contest_id: str,
-        problem_id: str,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return SubmitResult(
-            success=False,
-            error="CSES submit not yet implemented",
-            submission_id="",
-            verdict="",
-        )
-
 
 if __name__ == "__main__":
     CSESScraper().run_cli()

scrapers/kattis.py

@@ -1,289 +0,0 @@
-#!/usr/bin/env python3
-
-import asyncio
-import io
-import json
-import re
-import zipfile
-from datetime import datetime
-
-import httpx
-
-from .base import BaseScraper
-from .models import (
-    ContestListResult,
-    ContestSummary,
-    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"
-}
-TIMEOUT_S = 15.0
-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=TIMEOUT_S)
-    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=TIMEOUT_S)
-    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, 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)
-
-    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,
-            }
-        ),
-        flush=True,
-    )
-
-
-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",
-                    )
-                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",
-                )
-        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")
-            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,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return SubmitResult(
-            success=False,
-            error="Kattis submit not yet implemented",
-            submission_id="",
-            verdict="",
-        )
-
-
-if __name__ == "__main__":
-    KattisScraper().run_cli()

scrapers/language_ids.py

@@ -1,18 +0,0 @@
-LANGUAGE_IDS = {
-    "atcoder": {
-        "cpp": "5028",
-        "python": "5078",
-    },
-    "codeforces": {
-        "cpp": "89",
-        "python": "70",
-    },
-    "cses": {
-        "cpp": "C++17",
-        "python": "Python3",
-    },
-}
-
-
-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")
 
@@ -64,13 +63,6 @@ class TestsResult(ScrapingResult):
     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/usaco.py

@@ -1,299 +0,0 @@
-#!/usr/bin/env python3
-
-import asyncio
-import json
-import re
-from typing import Any, cast
-
-import httpx
-
-from .base import BaseScraper
-from .models import (
-    ContestListResult,
-    ContestSummary,
-    MetadataResult,
-    ProblemSummary,
-    SubmitResult,
-    TestCase,
-)
-
-BASE_URL = "http://www.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"
-}
-TIMEOUT_S = 15.0
-CONNECTIONS = 4
-
-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=TIMEOUT_S, 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:
-            current_div = heading_m.group(3).lower()
-            sections.setdefault(current_div, [])
-            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()
-
-    return {
-        "tests": tests,
-        "timeout_ms": timeout_ms,
-        "memory_mb": memory_mb,
-        "interactive": interactive,
-    }
-
-
-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 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:
-        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,
-                        }
-
-                    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,
-                    }
-
-            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,
-        source_code: str,
-        language_id: str,
-        credentials: dict[str, str],
-    ) -> SubmitResult:
-        return SubmitResult(
-            success=False,
-            error="USACO submit not yet implemented",
-            submission_id="",
-            verdict="",
-        )
-
-
-if __name__ == "__main__":
-    USACOScraper().run_cli()

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

@@ -10,7 +10,7 @@ from typing import Any
 import httpx
 import pytest
 import requests
-from curl_cffi import requests as curl_requests
+from scrapling import fetchers
 
 ROOT = Path(__file__).resolve().parent.parent
 FIX = Path(__file__).resolve().parent / "fixtures"
@@ -136,15 +136,12 @@ def run_scraper_offline(fixture_text):
 
             case "codeforces":
 
-                class MockCurlResponse:
+                class MockCodeForcesPage:
                     def __init__(self, html: str):
-                        self.text = html
+                        self.html_content = html
 
-                    def raise_for_status(self):
-                        pass
-
-                def _mock_curl_get(url: str, **kwargs):
-                    return MockCurlResponse(_router_codeforces(url=url))
+                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:
@@ -175,7 +172,7 @@ def run_scraper_offline(fixture_text):
                     raise AssertionError(f"Unexpected requests.get call: {url}")
 
                 return {
-                    "curl_requests.get": _mock_curl_get,
+                    "Fetcher.get": _mock_stealthy_fetch,
                     "requests.get": _mock_requests_get,
                 }
 
@@ -215,23 +212,21 @@ def run_scraper_offline(fixture_text):
                         return MockResponse(data)
                     raise AssertionError(f"No fixture for CodeChef url={url!r}")
 
-                class MockCodeChefCurlResponse:
+                class MockCodeChefPage:
                     def __init__(self, html: str):
-                        self.text = html
+                        self.body = html
+                        self.status = 200
 
-                    def raise_for_status(self):
-                        pass
-
-                def _mock_curl_get(url: str, **kwargs):
+                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 MockCodeChefCurlResponse(html)
+                        return MockCodeChefPage(html)
                     raise AssertionError(f"No fixture for CodeChef url={url!r}")
 
                 return {
                     "__offline_get_async": __offline_get_async,
-                    "curl_requests.get": _mock_curl_get,
+                    "Fetcher.get": _mock_stealthy_fetch,
                 }
 
             case _:
@@ -250,7 +245,7 @@ def run_scraper_offline(fixture_text):
         offline_fetches = _make_offline_fetches(scraper_name)
 
         if scraper_name == "codeforces":
-            curl_requests.get = offline_fetches["curl_requests.get"]
+            fetchers.Fetcher.get = offline_fetches["Fetcher.get"]
             requests.get = offline_fetches["requests.get"]
         elif scraper_name == "atcoder":
             ns._fetch = offline_fetches["_fetch"]
@@ -259,7 +254,7 @@ def run_scraper_offline(fixture_text):
             httpx.AsyncClient.get = offline_fetches["__offline_fetch_text"]
         elif scraper_name == "codechef":
             httpx.AsyncClient.get = offline_fetches["__offline_get_async"]
-            curl_requests.get = offline_fetches["curl_requests.get"]
+            fetchers.Fetcher.get = offline_fetches["Fetcher.get"]
 
         scraper_class = getattr(ns, scraper_classes[scraper_name])
         scraper = scraper_class()

tests/test_scrapers.py

@@ -6,6 +6,11 @@ from scrapers.models import (
     TestsResult,
 )
 
+MODEL_FOR_MODE = {
+    "metadata": MetadataResult,
+    "contests": ContestListResult,
+}
+
 MATRIX = {
     "cses": {
         "metadata": ("introductory_problems",),
@@ -38,16 +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

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