# Changelog

## 0.1.6

Findings from installing this on a live system, replacing a working YAML
implementation. Every one of these was silent - the add-on looked healthy while
being completely unable to do its job.

- **`run.sh` must use `#!/usr/bin/with-contenv sh`.** The HA base images run
  s6-overlay, which starts services with a SANITISED environment. With a plain
  shebang, SUPERVISOR_TOKEN is simply absent and every Home Assistant call
  returns 401 - while `homeassistant_api: true` makes the permissions look
  correctly granted. Startup now logs the token length and probes the Core API,
  so the next person sees it in one line.
- **Bump `version:` for every change.** Supervisor keys the built image by
  version, so editing source and rebuilding silently reuses the old image. Two
  fixes appeared not to work because of this.
- **Dependencies come from apk, not pip.** Alpine is musl and there are no musl
  wheels for aiohttp; pip would compile it on the client's Pi.
- **paho-mqtt 1.x and 2.x are both supported.** Alpine ships 1.x, which has no
  `CallbackAPIVersion`; that raised and took the whole add-on down with it.
- **MQTT can no longer take down control.** Publisher construction is wrapped -
  observability must never stop the controller.
- **MQTT discovery is published from `on_connect`.** paho drops QoS-0 publishes
  issued before the CONNACK, so announcing straight after `connect()` published
  nothing at all while logging "MQTT connected".
- **Repeated failures log at most once a minute.** The control loop retries every
  second; unthrottled warnings rolled the log buffer and destroyed the startup
  diagnostics needed to debug the 401 above.
- **`auto_start` works.** The store's defaults supplied `auto: False`, so the
  fallback to the option could never fire.

Known issue: after deleting the MQTT entities from the registry during
development, Home Assistant would not re-adopt them from retained discovery -
not even after clearing the retained topics and reconnecting. The add-on
publishes correct discovery and live state (verified on the broker); this is an
HA-side adoption problem and affects status entities only, never control.

## 0.1.0

First packaged release. Ports the control loop and the monthly maintenance
cycle from the reference Home Assistant implementation into an add-on.

- Grid-following control: gain/slew/clamp/deadband with anti-windup, all tuned
  against measured hardware behaviour (see FIELD-GUIDE.md §14).
- Saturation freeze **with the duration term** — three consecutive diverging
  cycles, not one. The instantaneous test fires on every large correction,
  because the plant itself needs 3-6 s to settle.
- Monthly maintenance cycle as an ownership state machine: drain / charge /
  hold, with exactly one writer of the setpoint at any moment.
- Capacity-tariff awareness: the maintenance charge is capped by quarter-hour
  peak headroom, and peak shaving outranks the maintenance schedule.
- Failsafe behaviour: commands 0 W on missing inputs, on stop, and on shutdown.
  Never replays a stale setpoint - the reference implementation did, and the
  hardware watchdog cannot catch that.
- Ingress UI with a commissioning checklist that names problems in words.
- Optional MQTT discovery for status entities.

Known limits:

- Home Assistant OS / Supervised only (add-ons cannot run on Container/Core).
- The inverter protocol is reverse-engineered; no vendor contract.
- Without the optional RS485 e-stop, nothing covers the host machine dying.