backend/usage/ polls each account's rate-limits.json (read-only mount,
USAGE_STATE_DIRS) and keeps every change (+ a 30 min heartbeat) in
usage_limits. A daily fit over 14 days of hourly rises vs the runs'
meterBins gives plan units per 1 % of the 5h / week window; only trusted
fits (n>=24, R2>=0.5, within x3 of the seed) replace the rate, and a >20 %
shift pushes a notification. Cards carry planPct, --final notifications
get ' · $X · ≈Y% wk', and /api/usage/{limits,history,calibration,
calibrate,import} serve the Plan usage page (owner only).
scripts/usage-backfill-ha.py imports the HA hourly statistics since July.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Gabriel Vidal
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