Model/packages
Khalim Conn-Kowlessar 537e18bc2e P5.8: SapResult.intermediate exposes CO2 chain
Adds delivered_fuel_kwh_per_yr (sum of all five end-use kWh) and
co2_factor_kg_per_kwh (mirrors the SAP10 input). Together with the
top-level co2_kg_per_yr they make the §15 equation traceable:
co2 = delivered_fuel × factor.
2026-05-19 10:32:59 +00:00
..
domain P5.8: SapResult.intermediate exposes CO2 chain 2026-05-19 10:32:59 +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

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/.