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Khalim Conn-Kowlessar 2104c8c2da P5.6: SapResult.intermediate exposes per-end-use fuel costs 
Per-end-use £/yr costs (main heating, secondary heating, hot water,
pumps_fans, lighting) lifted from the inlined total_cost sum into named
locals and populated on `intermediate`. §12 sweep slices can now diff
each line against the spec (Table 12 unit prices, future Table 12a
fractional blending, Table 12c heat-network DLF) without re-deriving
the cost decomposition.

Behaviour-preserving — `total_fuel_cost_gbp` reconciles bit-for-bit.

136 SAP tests pass.
2026-05-19 10:24:27 +00:00
..
domain P5.6: SapResult.intermediate exposes per-end-use fuel costs 2026-05-19 10:24:27 +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/.