Commit Graph
3 Commits
Author SHA1 Message Date
glenn schrooyenandClaude Opus 5 cc4e88490b SAFETY-02 review: a latch that a restart clears is not a latch
BLOCKER. `auto` was persisted and `sign_wd.tripped` was not, so reconstructing
the Controller against the same store - which is what a container restart does -
brought it back ARMED, into the same fault, unattended: tripped=False, banner
back to NOT READY, and it resumed commanding -1000 then -2000 W before
re-tripping 180 s later. "Restart the add-on" is the first thing an operator
looking at a FAILSAFE banner and a 0 W inverter will try, and under a supervisor
that restarts a crashed add-on it is a loop of three-minute wrong-direction
bursts. DOCS.md's "it does not clear itself" was false across a restart.

`sign_tripped` and `sign_reason` are Store keys now, beside the maintenance
state and for the reason store.py's own docstring gives. Written the moment the
trip happens - reason first, flag second, so a crash between the two can never
persist a latch with no explanation - restored in Controller.__init__, cleared
only by the operator's start. The regression is covered: reverting the restore
fails seven checks in test_watchdog.py.

Review follow-ups, no behaviour change:

- The arming gate is tested against the REAL arbiter. It is the decision the
  ticket turns on and it was asserted in three comment blocks and verified by
  nothing - every case passed `following` in as a literal. Twelve claim
  configurations now derive it from resolve(), including the redirect case
  `winner == "loop"` alone would have got wrong and the `lo` limit that raises
  magnitude without flipping sign.
- The MQTT `status: "failsafe"` value is tested. The check that claimed to cover
  it restated the line above it and never touched the payload.
- The worked example described a config that does not ship: at the defaults
  maintenance_charge_w 2500 against max_w 2000 is an arbiter contradiction and
  0 W, not a -2500 W charge. Rewritten at 1500 W. The contradiction is a real
  pre-existing bug - a default cheap-window maintenance charge silently never
  happens - filed separately and deliberately not fixed here.
- Forward hazard recorded at the gate: `winner == "loop"` disarms the watchdog
  under any higher-priority SET, and a peak-shaving strategy at P_PEAK IS
  grid-following in sign, so it would blind this for every peak event.
- disagrees() is public so the replay harness stops carrying its own copy of the
  predicate it grades.
- held_s takes the clock instead of reading one.
- The two limits are now each stated in both places rather than one each.
- The no-false-positive argument is tied to control.py's freeze permitting the
  command to cross zero; under the shrink-only encoding control.py records as
  rejected, this would false-trip on a load step.
- Measured figures corrected: 93.4 % / 4212 of 17280, per-cluster
  0.3/0.9/10.5/0.0, and the near-circularity of those figures is now stated
  rather than leaned on.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Du77usMj8XNKNFZGmUiWDa
2026-08-28 22:33:15 +02:00
adminandClaude Opus 5 594f8f9fc9 Six silent failures found by installing this on a live system
Migrated the reference site off the YAML packages and onto the add-on. Every
bug below presented identically: the add-on starts, logs "started", serves its
UI, and cannot do its job.

- run.sh needs #!/usr/bin/with-contenv sh. s6-overlay sanitises the environment
  for services, so a plain shebang means SUPERVISOR_TOKEN is absent and every
  Core API call is 401 - while homeassistant_api: true makes permissions look
  granted. Startup now prints the token length and probes the API.
- Supervisor keys the image by config.yaml `version`, so rebuilding without a
  bump reuses the old image. Two fixes appeared not to work because of it.
- Alpine is musl and has no aiohttp wheel on PyPI; deps now come from apk so
  nothing compiles on a client's Pi.
- Alpine ships paho-mqtt 1.x, which has no CallbackAPIVersion. That raised at
  construction and took the control loop down with it - so MQTT setup is now
  wrapped too. Observability must never be able to stop the controller.
- MQTT discovery is published from on_connect: paho silently drops QoS-0
  publishes issued before the CONNACK, so the previous code announced nothing
  while logging "MQTT connected".
- Repeated failures now log once a minute. Six warnings a second rolled the log
  buffer and destroyed the startup diagnostics needed to find the 401.
- auto_start could never fire, because the store's defaults always supplied
  auto: False for the fallback to find.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016NckgXecasQb2eSsPYNSW6
2026-08-23 02:25:58 +02:00
adminandClaude Opus 5 0a1e61dbc9 Packaged as a Home Assistant add-on, with a field guide
Turns the reference RS485 controller into something a technician can install
at a client site: a typed config form instead of YAML, an ingress UI that
names misconfiguration in words, and persistent state that cannot be broken by
a timezone.

Why an add-on rather than YAML packages or blueprints:

- Blueprints cannot create helpers, and the maintenance cycle is a state
  machine whose phase and completion date must survive restarts.
- YAML packages need filesystem access, a configuration.yaml edit and a
  restart - none of which belong in a client install.
- Add-ons authenticate with SUPERVISOR_TOKEN, so there is no long-lived token
  to generate, store or leak on someone else's machine.
- Requires HA OS/Supervised. Container and Core installs cannot run add-ons at
  all, which is a market decision, not an oversight.

The control law and the maintenance machine are pure functions with no Home
Assistant imports, and both ship with runnable checks (22 and 22 assertions).
Every assertion corresponds to a rule whose absence caused an observed failure
on hardware - the saturation duration term, the clamp-before-slew ordering, the
deadband, the sign convention.

One behaviour deliberately differs from the implementation it replaces: when
its inputs go missing this commands 0 W rather than replaying the last
setpoint. The reference version kept replaying, which the hardware watchdog
cannot catch - from the ESP32's side, Home Assistant is still talking to it.

Includes the ESPHome firmware (now parameterised: node name, inverter rating,
watchdog timeout) and the optional RS485 e-stop. FIELD-GUIDE.md carries the
commissioning gates, all judged on the wire rather than on how Home Assistant
looks, plus the written statement a site without an e-stop needs signed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016NckgXecasQb2eSsPYNSW6
2026-08-23 01:15:25 +02:00