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Khalim Conn-Kowlessar 6b99ad0a55 heat_transmission: route exposed/semi-exposed floors through Table 20 
SapFloorDimension gains an is_exposed_floor flag (default False) signalling
that the floor sits over outside air or unheated space rather than soil —
typical for an extension that hangs off the main from the first storey
upward (Elmhurst 000490 Extension 1 is exactly this shape).

heat_transmission_from_cert now consults the flag on the part's ground
SapFloorDimension and dispatches to u_exposed_floor (Table 20) instead
of the BS EN ISO 13370 / Table 19 cascade. Basement floor still wins
priority (Table 23 § 5.17 overrides everything else for that part).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 13:22:44 +00:00
..
domain heat_transmission: route exposed/semi-exposed floors through Table 20 2026-05-20 13:22:44 +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/.