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3 Commits
Author SHA1 Message Date
glenn schrooyenandClaude Opus 5 d57122ec74 DATA-02: a real Belgian price year, so AC4 stops being unmeetable
checks / unit (pull_request) Successful in 3m36s
OPT-04 reported AC4 - "net-positive across 12 months of replayed prices" -
as NOT MET and replayed a synthetic year, because scenarios/ held only P1
meter captures. Right call, wrong diagnosis: the criterion was being carried
beside a 30-day METER criterion as though both needed waiting. EPEX BE
day-ahead is public data, not a capture. It needed a fetch.

8760 hourly points, 2025-09-01 to 2026-09-01 Brussels-local, canonical three
fields. Licence checked BEFORE committing: Energy-Charts publishes the BE
zone under CC BY 4.0 from Bundesnetzagentur | SMARD.de and other zones under
private-use-only terms, so this one is redistributable with attribution. The
fetcher refuses to write a file whose per-response license_info stops saying
so. Cross-checked against SMARD's own 4996/DE: 96 of 96 quarter-hours, max
difference 0.00 EUR/MWh.

Raw wholesale, and the file says so. all_in: false, with the markup/tax
assumption carried as numbers to APPLY rather than numbers applied -
TARIFF-02's trap in data form. Section 7B applies it in one visible place and
asserts arithmetically that its additive terms cancel out of every daily
spread, so the trade count turns on the VAT multiplier alone; the raw replay
is run too, so how much rests on the guess is reported (110 vs 88).

DST by construction: iterate in UTC, render through price.brussels().
2025-10-26 is 25 points, 2026-03-29 is 23, verified by counting per Brussels
day rather than asserting 24, and by checking October's 02:00 appears twice
at two offsets with two prices while March's never appears. Both bugs the
point-and-gap accounting caught were real: a UTC-bounded window made the
first day 22 hours, and an inclusive-end off-by-one dropped the last day
silently. A day nobody asked for is not a day with no prices.

THE RESULT, AT THE SHIPPED DEFAULT, WHATEVER IT IS. At 0.10 widened 1.5x to
0.1500: 110 round trips, +24.88 EUR net of the cycle cost. Unwidened, 173.
Nothing tuned - the threshold and the 2.5/1.5 factors are untouched.

And what the owner's decision now has under it: the four reports that a
static ~0.0840 spread does not clear 0.10 all STAND. What was missing is that
a dynamic site clears the widened requirement on 121 of 365 days, median
all-in spread 0.1130, so a median day would clear at 0.0754 - 156 trips,
+35.42 EUR. Reported, not applied.

The synthetic year stays, because the real one cannot grade section 17: not
one of 365 days has a negative DEAREST hour, so a zero there counts something
that could not happen. 7B asserts that degeneracy rather than reporting the
zero.

Size measured, not assumed: 893 KB plain but 74.6 KB as a git object against
56.5 KB gzipped. Git already compresses; 18 KB is not worth making the
provenance block - the licence claim a reviewer must check - unreadable in a
diff.

Nothing wired into the add-on; generic_dayahead is still the live path.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015VXjA3LWccN1rJsk3okyPC
2026-08-31 11:01:42 +02:00
glenn schrooyenandClaude Opus 5 f4914a174a TARIFF-01: measure the month's billed peak, and make it survive a restart
checks / unit (pull_request) Successful in 2m38s
The 15-minute block average was already built and unwired. p1.QuarterAverager
computes clock-aligned 900 s blocks, time-weighted over irregular telegram
spacing, offtake-only and per-phase; P1Ingest.blocks was a 96-entry list in
memory that a restart erased. So this is the persistence and the monthly
reduction, not a second accumulator - a second one would be a second source of
truth for the exact quantity the money depends on.

BLOCKS, NOT A SLIDING WINDOW. The card says "rolling"; 9.1 bills "the highest
15-minute average offtake" and states its own worked case per QUARTER - one
4998 W quarter moving a monthly peak from 4832 to 5013 W. A trailing window
reports a peak the meter never bills, and reports it HIGH: a burst straddling
:15 fills the window completely while contributing to two block averages at
partial weight.

DELIVERED, NOT INTENDED. tariff.py only ever sees P1Sample - the meter's own
reading - and never a setpoint. SAFETY-20's open question does not arise for a
capacity tariff: the utility integrates the current that flowed.

AN UNREADABLE STORE IS NOT A ZERO PEAK. peak() answers OBSERVED / NO_RECORD /
NOT_OBSERVED with peak_w None unless observed, which is riglock.holder()'s fix
applied to something that spends money. A peak read as 0 W hands SAFETY-07
maximum headroom and disarms the guard at the moment its own storage breaks.

Restart mid-block resumes the accumulator through a new snapshot()/restore()
pair, checkpointed every 15 s and cleared in the same breath as a block close.
The held sample keeps its ORIGINAL timestamp, so an outage is integrated under
the same max_hold_s rule a running process would apply. quarter_start is the
primary key and a re-bank may only ever RAISE a figure.

Calendar months are LOCAL: a quarter starting 22:15 UTC on 31 August bills in
September.

No new option (the limit is the existing peak_cap_w), so config.yaml and
validate.py are untouched and CFG-03 is not widened. No second peak entity:
peak_forecast_entity stays the input to maintenance_charge_floor(), because
repointing that consumer changes what moves energy and belongs to SAFETY-07.

AC 3 is NOT met. It asks for 30 days of replay; two days of this house's real
meter exist and are committed here. test_tariff.py part 9 replays them, reports
the percentage next to the sample size in days, and asserts nothing about 95 %.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015VXjA3LWccN1rJsk3okyPC
2026-08-30 19:13:58 +02:00
glenn schrooyenandClaude Opus 5 7aa1bd052e SAFETY-18: a meter frozen at a wrong-but-fresh value now raises an alarm
A meter that answers 200 OK with a stale document forever is ARRIVING on every
poll, so every freshness mechanism in the stack reads it as healthy while the
loop integrates a constant error and rails: 360/135/75 s at the live install's
max_w: 5000 for a meter frozen at 350/1000/>=3000 W. Fifteen minutes of a 5 kW
unattended import sets the month's billed capaciteitstarief peak.

The detector is a conjunction, not the bare unchanged_s threshold TEL-05
measured and rejected:

    unchanged_s >= meter_freeze_s   AND   |command| within 5 % of max_w

Both terms already existed and were already on the status page, and they fail
for independent reasons: at the converged point the command is nowhere near the
rail, and at the rail against a real load the kWh registers move in seconds. At
the shipped 300 s the relation is structural rather than a margin - the slowest
a healthy 1 Wh register can tick and still look unchanged is 12 W, which is
inside the 15 W deadband, so the command there is parked at 0 W.

Notification only, deliberately: an HA persistent notification with a fixed
notification_id, an ERROR log line, a UI event and a red status row. No claim,
no latch, no 0 W. A false trip parks the battery; a false notification costs an
alert. Only meter_source: homewizard_local is covered - the status page says
NOT COVERED elsewhere rather than pretending the guard is armed.

DOCS.md states the capacity-tariff exposure this does NOT close: peak_cap_w caps
maintenance charging and nothing caps the loop. That cap is SAFETY-07.

test_freeze.py grades both directions and was verified by breaking what it
watches (six mutations, all red): silent over the committed 40-minute converged
capture, silent over an hour of TEL-05's low-power case where the rejected bare
threshold is shown to fire, alarming on a genuinely frozen meter driven over
real HTTP through the real HomeWizardLocalSource (the rig's own hwsim freeze
fault when reachable), silent on the same railed command against a meter that is
still moving, and asserting on the service call that leaves Controller.cycle()
rather than on the watchdog's own flag.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015VXjA3LWccN1rJsk3okyPC
2026-08-30 02:39:54 +02:00