Move gateway/platforms/homeassistant.py into plugins/platforms/homeassistant/
following the same shape as the Mattermost and Discord migrations.
- Adapter file is renamed via git mv (history is preserved).
- register() exposes the platform via the plugin system instead of the
hardcoded Platform.HOMEASSISTANT elif in gateway/run.py::build_adapter().
- _standalone_send() replaces the legacy _send_homeassistant() helper in
tools/send_message_tool.py. Out-of-process cron delivery
(deliver=homeassistant from a cron process not co-located with the
gateway) now flows through the registry's standalone_sender_fn path
instead of the hardcoded elif.
- _is_connected() probes HASS_TOKEN via hermes_cli.gateway.get_env_value
so existing connected-platform checks behave identically.
The HASS_TOKEN / HASS_URL env-to-PlatformConfig seeding in
gateway/config.py stays in core — same pattern bluebubbles, mattermost,
and discord migrations followed. No setup_fn or apply_yaml_config_fn is
registered because Home Assistant has no _setup_homeassistant wizard in
hermes_cli/setup.py and no homeassistant: YAML block in config.yaml today;
setup runs through the existing hermes_cli/tools_config.py toolset wizard.
Test imports were rewritten across tests/gateway/test_homeassistant.py,
tests/integration/test_ha_integration.py, and
tests/tools/test_send_message_missing_platforms.py; the legacy
(token, extra, chat_id, message)-shaped _send_homeassistant call site is
preserved via a small SimpleNamespace shim in
test_send_message_missing_platforms.py (same approach used when
mattermost moved).
- Focused HA suites (64 tests across the three rewritten files) pass.
- Broader gateway/cron sweep produces 10 failures identical to main
baseline (telegram approval/model-picker xdist isolation flakes,
wecom_callback defusedxml issue, cron script_timeout fixture issue).
Zero net new failures.
