The user's remaining universal-media-player dependency: some commands need hardware
this integration deliberately does not drive — a speaker switch that owns the
volume, an AVR input that has to move with the Shield, a mute that has to hit two
devices. One script per command is the escape hatch, and the rule is absolute: a
configured command calls its script INSTEAD of the native protocol/ADB path, and
with nothing configured every command behaves exactly as it did (the whole existing
suite passes untouched, which is what "byte-identical" means here).
* const.py owns the option: CONF_COMMAND_SCRIPTS (one dict, keyed by command),
SCRIPT_COMMANDS (turn_on, turn_off, volume_up, volume_down, volume_set,
volume_mute, select_source) and command_scripts(), the ONE normalizer of the
stored shape — options round-trip through HA storage and can be hand-edited, so a
value that is not a non-empty string for a known command is dropped instead of
reaching the service layer.
* media_player.py: async_run_command_script() calls script.turn_on with the script
entity and its variables, blocking=True so a failure surfaces HERE — a mapped
command that cannot run raises HomeAssistantError naming the command and script
rather than falling back silently or doing nothing. Every command method checks
its script first; volume_set passes `level` and select_source passes `app_name`.
* volume_mute also passes `is_volume_muted`: without it a mute script cannot tell
muting from unmuting, which is the case the user asked for.
* volume_set and select_source have NO native path (C-VOL; app launching goes
through play_media), so they are advertised only when configured — the feature
flag is what makes HA offer the command at all. Unset leaves the feature set
exactly as it was.
* remote.py shares async_run_command_script for POWER: turn_on/turn_off is one
configuration and the remote entity is the other route to it, so a script that
owns the power sequence owns it on both.
* config_flow.py: one entity selector per command (domain: script), stored as the
single dict option, prefilled from the entry's options and cleared by saving
without a value — the editor is the truth, as with the app map editor.
Two things the harness caught, worth recording: `MediaPlayerEntityFeature` has no
SET_VOLUME (the real member is VOLUME_SET — the stub enum and the drift engine
disagree with a wrong name), and the stub `homeassistant.exceptions` had no
HomeAssistantError, so the stub now mirrors the real inheritance
(ServiceValidationError derives from it).
tests/test_command_scripts.py covers each command mapped and unmapped, the exact
variable payloads, the native path untouched when unmapped (protocol key, then the
ADB fallthrough with the protocol down), the rejecting script's error, hand-edited
option shapes, and the feature set. test_config_flow_ux.py covers the selectors,
the stored shape, prefill and clearing. New tests leaked the harness into the next
file at first (a missing per-file scope); that is fixed, and
tests/test_harness_scoping.py now asserts that every file loading the harness scopes
it, so the next such mistake fails where it is made.
Verified: 401 passed / 2 skipped, 402 / 1 with androidtvremote2, reverse file order
401 / 2, ruff clean, and the drift engine exits 0 on a real-HA interpreter
(23 modules, 59 imports, 157 relative imports, 36 call arguments, 6 awaited HA calls).
