adminandClaude Opus 5
8a6acd9fa2
Text only. No behaviour change - same conjunction, same limits, same MISSING, same 0 W, same NOT READY. `tools/safety56_behaviour_trace.py` says so: 2390 capture reads, a 66-cell swept grid, and six driven controller worlds produce the byte-identical document `6030175e...` on origin/release/1.0 and on this branch, while the sentences differ. THE DEFECT. SAFETY-37's conjunction is satisfied by two disjoint worlds - the register has stopped reporting reality, or the SOURCE cannot comply with the command - and nothing `freshness.py` is handed separates them. Three sentences asserted the first. On the live 2026-09-21 episode it was the second: the pack read 11 % for the whole 850 s hold, every command in that hold was a discharge, and the register answered the first CHARGE command three seconds later. The readiness row was worse still, because it asserted a false fact about a NAMED entity that was present, numeric and updating - so the operator opened Developer Tools, found it working, and had every reason to conclude the diagnostics were broken. THE FIX. Each message states what was OBSERVED and names BOTH explanations. Three wordings, no shared helper: two are a log line about a behaviour, the third is a banner about an entity, and a helper serving both would drop whichever half the other caller does not need. SoC stays STATED, NOT WIRED - part 11b drives the two worlds at 50 % and 11 % and the sentence does not move one byte. The row does not branch on `batt_fresh.stale` either: `stale_note()` already rides `liveness_notes()` a few rows below, so the discriminator is "is that row there?", and part 11d asserts it is present in one world and absent in the other. THE CHECKS. test_freshness.py part 11 builds the pair of worlds with ground truth written down rather than derived from the published stream, asserts they are really two (40 of 40 reads differ) while the published stream is bit-identical, and only then grades the sentences. Eleven mutations, all red: each of the three sentences reverted (3, 2 and 2 named reds), the two explanations transposed at ZERO bytes (1), the second explanation deleted (1), the admission of ambiguity replaced by a ranking (1), all three reverted at once (5), and two aimed at this card's own check - collapsing the world pair (2) and emptying the accusation list, which a positive control against the three sentences as 0.10.1 shipped them catches (1). AND TWO OF THE ELEVEN FOUND DEFECTS IN THE CHECK RATHER THAN IN THE CODE. Transposing `label` and `entity` in the row made it unfindable and the run died on an IndexError - a red with no name and every later check ungraded, FCST-06's shape exactly; `_s56_row()` returns a named absence now, 0 named reds before, 3 after. And the first invariance run compared a tree with itself, because it archived a branch whose edits were not committed yet; the tool now REFUSES to report "behaviour unchanged" unless the sentences halves differ, and both of its refusals are driven. SAFETY-57's part 10h check was the handoff and is inverted rather than deleted: it required the accusation to still be present so that removing it had to be a deliberate act. This is that act. Its escape clause is untouched. Suite: 30/30 in the CI image, checks.yml's exact command, purged tree, :ro. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BwRLw7eKYj2byVdwB6kbjU
GoodWe RS485 Controller — Home Assistant add-on repository
Replaces a GoodWe battery inverter's vendor controller with a local one: holds net grid exchange at zero by emulating the inverter's smart meter over RS485, and runs the monthly battery maintenance cycle the vendor box was doing.
repository.yaml add-on repository metadata
goodwe_controller/ the add-on
config.yaml manifest + options schema (the per-site config form)
app/ the controller
control.py the control law — pure functions, no I/O
maintenance.py the monthly cycle state machine
hass.py Supervisor/Core API access
store.py persistent state in /data
mqtt.py optional status entities
web.py ingress UI — routes only, status and configuration
config_page.py the configuration page's markup, style and script
configui.py its field model, built from the Supervisor's own
schema + translations — owns no key, label or rule
selfconfig.py reading and writing this add-on's own options,
with the validate-first / compare-and-swap gate
main.py orchestration, heartbeat, failsafe behaviour
test_control.py runnable checks — no framework needed
test_maintenance.py runnable checks — walks a full cycle in fake time
DOCS.md the add-on's documentation tab
MUTATION.md how to run a mutation so the result means something
tools/mutation_run.sh the mutation harness - purges bytecode, then grades
tools/supervisor_selfapi_probe.py what the Supervisor really permits and
returns, run against its own release image
firmware/goodwe-master.yaml ESPHome config for the T-CAN485
estop/rs485_log.py optional RS485 e-stop / bus witness
docs/GoodWe-RS485-Field-Guide.pdf the guide techs carry (10pp, A4)
docs/build_guide.py its single source - rebuilds the HTML and PDF
FIELD-GUIDE.md how to edit and rebuild the guide
docs/RELEASE.md how a change reaches the battery - `master` is
protected, releases go via PR from `release/1.0`
Picking this up after a break? Read HANDOVER.md first — current state,
what is known broken, and what to do next.
Install
Settings → Add-ons → Add-on store → ⋮ → Repositories → add
https://gittea.kammenstraatha.duckdns.org/admin/goodwe-addon
then install GoodWe RS485 Controller.
⚠️ The repository must be PUBLIC for this to work. Home Assistant clones it
anonymously; against a private repo the store shows nothing and gives no useful
error. If it must stay private, install locally instead: copy
goodwe_controller/ into the machine's /addons/ folder, then
ha store reload — it appears as a Local add-on.
⚠️ Bump version: in goodwe_controller/config.yaml for every change.
Supervisor keys the built image by that version, so without a bump it silently
reuses the old image and your fix appears not to work — on your bench and on
every client's machine.
Requires Home Assistant OS or Supervised. Add-ons cannot be installed on HA Container or Core.
Read this first
The inverter holds its last command forever. It has no meter-timeout of its own — a controller that dies mid-command leaves the battery running until a human intervenes. Measured on real hardware: 5 kW of discharge held for 113 seconds after a controller went silent.
Three layers exist because of that, and only the third covers the Home Assistant machine itself dying:
- ESP32 watchdog — no fresh setpoint for ~30 s → command 0 W, and keep commanding it.
- Wind-down before firmware updates — 0 W written before the update starts.
- RS485 e-stop (optional) — writes 0 W after 30 s of total bus silence.
Sites sold without the e-stop must have the acknowledgement in FIELD-GUIDE.md
§10 signed.
Development
The control law and the maintenance machine are pure Python with no Home Assistant imports, so they run anywhere:
cd goodwe_controller
python3 test_control.py
python3 test_maintenance.py
Both must pass before shipping any change. To prove a check bites - the way
almost every claim in this repository was established - mutate the module and
run tools/mutation_run.sh, which clears __pycache__ first. It is not
optional: a same-size edit reverted inside one second leaves CPython reusing the
old bytecode, and the run grades code that is not there. goodwe_controller/MUTATION.md
has the mechanism, the measurement, and what the flags do not do. They are not unit-test theatre —
each assertion corresponds to a rule whose absence produced an observed failure
on real hardware, and the comments in control.py say which.
Compatibility
Check the serial number, not the model name. Characters 6-8 of the serial are the platform tag:
| tag | platform | verdict |
|---|---|---|
ESU EMU ESA BPS BPU EMJ IJL |
105 — ES/EM/BP, AA55-era meter bus | supported |
SPB SPN |
745 — SBP G2 (GW…-SBP-20) |
no |
ESN ESC |
745 — ES G2 (GW…-ES-20) |
no |
ETU EHU BTU … |
205/745/753 — ET/EH/BT hybrids | no |
SDT DST MSU NSU … |
PV-only inverters — no battery to control | no |
A "-20" or "G2" suffix means a different platform with a different meter
protocol. The tags come from the goodwe library's PLATFORM_105_MODELS, which
is also what Home Assistant's own integration uses to pick a protocol.
- GoodWe ES / BP family inverters (AA55 / RS485 meter-bus generation)
- The protocol is reverse-engineered. There is no vendor contract, and a firmware change on GoodWe's side could break every installation at once. Say so when you sell it.