Review findings on PR #1526:
- tests/domain/modelling/_optimiser_fixtures.py is the one home for the
overlay constants, the ScoredOption builder, the additive per-kind
StubScorer and the forced ventilation dependency; test_optimiser.py and
test_optimiser_fabric_first.py had byte-identical copies of each
(and _StubScorer / _VentStubScorer fold into one parameterised stub).
- Fixture worlds are domain-plausible per team convention: the fabric-vs-
heating contrast is a £12,000 EWI against a £3,200 gas boiler rather
than a £500 heat pump undercutting a £1,000 cavity wall; heating
overlays carry real identities (SAP Table 4a code 104 for the boiler,
a PCDF index for the heat pump) instead of code 201 doubling as both;
whole-dwelling double glazing is £3,500, not £500.
- Dead knobs removed: the unused _ROOF_OVERLAY, the always-zero roof
gain, the duplicate _BOILER_OVERLAY, and the nested conditional
expressions in the interaction stubs.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
