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Khalim Conn-Kowlessar 8bd8f8a622 slice 16a: rdsap_uvalues.py with cascade-defaulting U-value helpers 
Encodes RdSAP10 Tables 6-9 (walls), 15 (party walls), 16+18 (roofs),
19+BS EN ISO 13370 (floors), 20 (upper floors), 21 (thermal bridging),
24 (windows), 26 (doors).

Helpers (u_wall / u_roof / u_floor / u_window / u_door / u_party_wall /
thermal_bridging_y) cascade through cert -> age-band default ->
country default -> mid-range fallback so the envelope-heat-loss feature
is never null. Mirrors the RdSAP "assume as-built if no evidence" rule.

Country.from_code collapses EAW/GB/UK/unknown to ENG; SCT/NIR/WAL get
explicit K-M overrides where Tables 7-9 diverge from Table 6 (England).

28 tests, all AAA, cover the reference values and the cascade fallbacks.
2026-05-17 11:36:39 +00:00
..
domain slice 16a: rdsap_uvalues.py with cascade-defaulting U-value helpers 2026-05-17 11:36:39 +00:00
fetchers added potential file scaffolding: 2026-05-15 10:56:53 +00:00
repos added potential file scaffolding: 2026-05-15 10:56:53 +00:00
utils added potential file scaffolding: 2026-05-15 10:56:53 +00:00
README.md added potential file scaffolding: 2026-05-15 10:56:53 +00:00

README.md

Shared packages

Workspace packages consumed by services/*. Each package is its own Python distribution with its own pyproject.toml; services import via the workspace dependency mechanism ({ workspace = true }).

Package Purpose
domain/ Shared domain types — Property, BaselinePerformance, Plan, Scenario, EpcPropertyData, etc. No persistence, no IO, no business logic.
repos/ Persistence layer — one repo per aggregate. Owns the SQL. Depends on domain.
fetchers/ External API clients (gov EPC, Ofgem, Google Solar, etc.). Depend on domain for response shapes.
utils/ Cross-cutting infra — logging, S3, CloudWatch URL builders, SQS task helpers.

Adding a new shared package

Only when a real second consumer materialises. Don't pre-shatter (repos-epc, repos-property, ...) — split when a deployment needs to drop a dep, not before.

See ../ara_backend_design.md §11 for the broader monorepo layout and ../CONTEXT.md for the domain glossary that names the types living in domain/.