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Khalim Conn-Kowlessar 2bfecad272 Slice 31: §11a SAP rating cascade pin (24/24) 
Adds `sap_rating_section_from_cert(epc) -> SapRatingSection`. Composes
§1 TFA + §10a (255) total fuel cost via `fuel_cost_section_from_cert`,
then runs the SAP rating equations (`energy_cost_factor`, `sap_rating`,
`sap_rating_integer`).

Pins (256) deflator, (257) ECF, SAP continuous, (258) SAP integer for
all 6 fixtures — 24/24 PASS.

Existing e2e pins on `ecf`, `sap_score_continuous`, `sap_score`
already verified these outputs; cascade pins formalise §11a for the
worksheet-conformance test surface.

Cascade scoreboard: 660/660 → 684/684 (§7..§11a closed).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-24 08:06:52 +00:00
..
domain Slice 31: §11a SAP rating cascade pin (24/24) 2026-05-24 08:06:52 +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/.