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Pin the bills design from a /grill-with-docs session: - ADR-0014: whole-home annual bill from SAP10 Calculation's delivered kWh per end use, re-priced at real Fuel Rates (NOT the calculator's SAP-notional total_fuel_cost_gbp, which is RdSAP Table 32 standardised prices ~half real electricity). Fuel enum + FuelRates + FuelRatesRepository static snapshot; per-section + total flat columns; raise on unpriced fuel (house coal / heat network are the named gaps). - ADR-0013 amendment: the shadow stepping-stone is collapsed — the calculator is load-bearing now. effective=calculated for sap_version<10.2 (StubRebaseliner floor 10.0->10.2); >=10.2 keeps lodged + logs divergence; a strict-raise aborts the batch (load-bearing for bills regardless of version). - CONTEXT: EPC Energy Derivation -> Bill Derivation (no "service" suffix); Baseline Performance energy block = per-end-use kWh + per-section bill + total; Fuel Rates = committed static snapshot; Rebaselining trigger threshold 10.2. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| .. | ||
| 0001-two-source-paths.md | ||
| 0002-property-aggregate-root.md | ||
| 0003-python-writes-landlord-overrides-directly.md | ||
| 0003-strict-ingestion-modelling-separation.md | ||
| 0004-baseline-performance-lodged-effective-pair.md | ||
| 0005-multi-phase-scenarios-per-phase-recompute.md | ||
| 0006-deterministic-kwh-no-baseline-ml.md | ||
| 0007-kwh-as-ml-target.md | ||
| 0008-physics-as-feature.md | ||
| 0009-deterministic-sap-calculator.md | ||
| 0010-sap10-calculator-spec-target-and-validation.md | ||
| 0011-composable-stage-orchestrators.md | ||
| 0012-unit-of-work-per-stage-batch-transaction.md | ||
| 0013-bulk-upload-finaliser-writes-properties.md | ||
| 0013-calculator-produces-effective-performance-shadow-first.md | ||
| 0014-bill-derivation-from-real-fuel-rates.md | ||