testsAndMisc/docs/superpowers/evidence/wsg-grabber-player-split-2026-08-16.json
Krzysztof kuhy Rudnicki 16c626661d Split wsg_grabber/player.py under the 250-line cap
The stateless half of talking to mpv moves out:

  _mpv_ipc.py    read_reply, build_argv, encode, note_errors, and
                 probe_properties/query lifted out of MpvPlayer.probe/_query,
                 which only ever needed the socket path
  _player_api.py the Player Protocol that ui.py actually depends on

player.py keeps the class that owns the process and the socket, and re-exports
Player/build_argv/encode through __all__.

_note_errors stays as a bound delegate on MpvPlayer: test_player.py calls it on
the instance, and the tests are out of scope here. Caught by the suite failing,
not by guessing.

The probe constants moved across verbatim -- _PROBE_ID is 9001, and read_reply
matches replies on it, so a placeholder would have made every probe hang until
timeout while still returning a plausible error string.

player.py 373 -> 235, _mpv_ipc.py 158, _player_api.py 49. 277 tests pass.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011w2Pj4Ek3ZNMQVYcFHgXDY
2026-08-16 16:05:41 +02:00

38 lines
2.9 KiB
JSON

{
"intent": "Bring python_pkg/wsg_grabber/player.py under the 250-line file cap by separating the stateless mpv wire protocol and the Player interface from the class that owns the process and socket.",
"scope": [
"python_pkg/wsg_grabber/player.py",
"python_pkg/wsg_grabber/_mpv_ipc.py (new)",
"python_pkg/wsg_grabber/_player_api.py (new)",
"Non-goal: no behaviour change, no test changes, no change to the mpv command line"
],
"changes": [
"Moved the stateless wire protocol into _mpv_ipc.py: read_reply (was _read_reply), build_argv, encode, note_errors, plus probe_properties and query lifted out of MpvPlayer.probe/_query, which only ever needed the socket path.",
"Moved the Player Protocol into _player_api.py; ui.py depends on the interface, not on MpvPlayer.",
"Moved the probe constants _PROBE_ID, _PROBE_TIMEOUT_S and _PROBE_PROPERTIES verbatim alongside the code that reads them.",
"player.py re-exports Player, build_argv and encode through __all__.",
"MpvPlayer._note_errors is kept as a thin bound delegate to _mpv_ipc.note_errors, because test_player.py calls it on the instance and the tests are out of scope for this refactor.",
"player.py 373 -> 235 lines; _mpv_ipc.py 158; _player_api.py 49."
],
"verification": [
{
"command": "python3 -m pytest python_pkg/wsg_grabber/tests/ -q --cov=python_pkg.wsg_grabber --cov-report=term-missing",
"result": "pass",
"evidence": "277 passed in 15.14s. _mpv_ipc.py 51 stmts / 14 branches 100%, _player_api.py 100%, player.py 89 stmts 100%. An intermediate version of this split failed with 1 failed / 276 passed because test_mpv_errors_are_logged_rather_than_discarded calls mpv._note_errors as a bound method; the delegate was added in response to that real failure, not pre-emptively."
},
{
"command": "pre-commit run --files python_pkg/wsg_grabber/player.py python_pkg/wsg_grabber/_mpv_ipc.py python_pkg/wsg_grabber/_player_api.py",
"result": "pass",
"evidence": "Only the expected 'no staged evidence artifact' failure remained, which this file satisfies. ruff, ruff format, mypy, pylint, bandit and the coverage-gated pytest all pass with no suppression."
}
],
"risks": [
"_PROBE_ID is 9001 and read_reply matches replies on it. An intermediate version of the new module briefly carried a placeholder value of 1, which would have made every probe hang until timeout while still returning a plausible-looking error string; the constants were then moved across verbatim and the value re-checked at 9001.",
"probe_properties/query now take an ipc_path rather than reading self._ipc_path. MpvPlayer.probe delegates, so the public behaviour is unchanged and the tests that drive mpv.probe() cover both."
],
"rollback": [
"git revert the commit; player.py returns to its 373-line form and the two new modules are deleted.",
"After rollback, run python3 -m pytest python_pkg/wsg_grabber/tests/ -q to confirm 277 tests still pass."
]
}