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Khalim Conn-Kowlessar f09e83b6a1 P5.12: align per-end-use primary energy to §11 sketch (per-m²) 
P5.9 exposed the four primary-energy components as absolute kWh/yr
keys (space_heating_primary_kwh_per_yr, …). HANDOVER_SYSTEMATIC_REVIEW
§11 specifies these as `_pe_kwh_per_m2` because primary energy enters
the rating equation per floor area. Renamed to match the sketch:
- space_heating_pe_kwh_per_m2
- hot_water_pe_kwh_per_m2
- other_pe_kwh_per_m2
- pv_pe_offset_kwh_per_m2

Chain check now verifies max(0, sum − pv_offset) ≈
result.primary_energy_kwh_per_m2 (the top-level per-m² field).
Absolute kWh/yr values remain recoverable via tfa_m2 on `intermediate`.
2026-05-19 12:21:15 +00:00
..
domain P5.12: align per-end-use primary energy to §11 sketch (per-m²) 2026-05-19 12:21:15 +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/.