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Khalim Conn-Kowlessar 2661481625 slice S-A1: Appendix U climate tables (U1/U2/U3) 
First slice of the SAP10 Calculator Session A (ADR-0009). Ships the three
SAP 10.3 Appendix U monthly tables across 22 climate regions (region 0 =
UK average; 1-21 named per spec) as a pure-data module under the new
domain/sap/ package:

- Table U1: mean external temperature (°C)
- Table U2: wind speed (m/s)
- Table U3: mean global solar irradiance on horizontal plane (W/m²)
- Table U3 footer: monthly solar declination (°, region-independent)

Lookups validate region (0..21) and month (1..12) and raise ValueError
on out-of-range inputs. 11 AAA tests cover happy-path lookups across
multiple regions/months plus boundary and error cases.
2026-05-17 21:43:09 +00:00
..
domain slice S-A1: Appendix U climate tables (U1/U2/U3) 2026-05-17 21:43:09 +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/.