## Problem
CodeChef had no working login, submit, or contest list. The browser
selectors were wrong, the contest list was missing present/past
contests,
and problem/contest URLs were unset.
## Solution
Fix login and submit selectors for the Drupal-based site. Paginate
`/api/list/contests/past` to collect all 228 Starters, then expand each
parent contest into individual division entries (e.g. `START228 (Div.
4)`).
Add language IDs, correct `url`/`contest_url`/`standings_url` in
metadata,
and make `:CP <platform>` open the contest picker directly.
## Problem
Codeforces language version IDs were wrong (pointed at old compiler
versions), `LANGUAGE_VERSIONS` was incomplete for most platforms, the
contest picker crashed when `supports_countdown` was stored as a
non-table entry, and `:CP stress` restored a broken IO view on exit.
## Solution
Correct CF `programTypeId` values and default to C++20. Add
`LANGUAGE_VERSIONS` entries for all six platforms. Guard
`get_contest_summaries` against non-table cache entries. Call
`ensure_io_view()` after stress session restore. Shorten the stress
terminal buffer name to a readable `term://stress.py` format.
## Problem
Switching contests while a run, interactive session, or stress test was
active left orphaned callbacks and terminal jobs alive. Running `:CP
run`
twice also let the first run's stale output overwrite the buffer.
## Solution
Replace the `io_view_running` bool in `views.lua` with a generation
counter so concurrent `run_io_view` calls self-cancel via stale-gen
checks in async callbacks. Add `cancel_io_view`, `cancel_interactive`,
and `stress.cancel` for forceful teardown, and call them in
`setup_contest` whenever `is_new_contest` is true.
## Problem
After the initial submit hardening, two issues remained: source code was
read in Lua and piped as stdin to the scraper (unnecessary roundtrip
since
the file exists on disk), and CF's `page.fill()` timed out on the hidden
`textarea[name="source"]` because CodeMirror owns the editor state.
## Solution
Pass the source file path as a CLI arg instead — AtCoder calls
`page.set_input_files(file_path)` directly, CF reads it with
`Path(file_path).read_text()`. Fix CF source injection via
`page.evaluate()`
into the CodeMirror instance. Extract `BROWSER_SUBMIT_NAV_TIMEOUT` as a
per-platform `defaultdict` (CF defaults to 2× nav timeout). Save the
buffer
with `vim.cmd.update()` before submitting.
Add stress.lua that auto-detects or accepts generator and brute solution
files, compiles C++ if needed, and launches scripts/stress.py in a
terminal buffer with session save/restore and cleanup autocmds.
Add scripts/stress.py as a standalone loop that runs generator → brute →
candidate, comparing outputs and exiting on the first mismatch.
