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Khalim Conn-Kowlessar e2c37300ec u_exposed_floor: Table 20 lookup for exposed/semi-exposed upper floors 
RdSAP10 §5.13 Table 20 (page 47) gives U-values for upper floors that
sit over outside air (exposed) or enclosed unheated space (semi-exposed) —
e.g. an extension hanging off the main from the first storey upward.
The spec collapses both into the same lookup: keyed on age band ×
insulation thickness, no geometry needed.

Elmhurst worksheet U985-0001-000490 Extension 1 records U=1.20 W/m²K
for its exposed timber floor (age B, no insulation). Table 20 row
"A to G, insulation unknown or as built" returns 1.20 exactly.

Caller wiring (heat_transmission_from_cert routing on a floor_position
discriminator) lands in the next slice.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 13:19:46 +00:00
..
domain u_exposed_floor: Table 20 lookup for exposed/semi-exposed upper floors 2026-05-20 13:19:46 +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/.