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Khalim Conn-Kowlessar 269dd991b5 Elmhurst 000490 fixture: tag Ext1 floor as exposed timber 
Per the worksheet docstring on this fixture, Extension 1 hangs off the
main from the first storey upward — its lowest dimension is an exposed
timber floor (over outside air), not a ground floor on soil. Set
is_exposed_floor=True so heat_transmission_from_cert routes Ext1 through
the Table 20 lookup (U=1.20 W/m²K at age B unknown insulation) instead
of BS EN ISO 13370.

Combined with the Table 19 fn 1 default that routes Main to the
suspended-timber branch (U≈0.71), §3 LINE_28A floor sum lands at
≈32.4 W/K — matching the worksheet's 0.71×14.85 + 1.20×18.18.

A new floor-sum regression test pins the combined behaviour; the existing
LINE_31/36 parametrised test still passes (the exposed-floor route
contributes its area to LINE_31 the same way the ground-floor route did).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 13:28:23 +00:00
..
domain Elmhurst 000490 fixture: tag Ext1 floor as exposed timber 2026-05-20 13:28:23 +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/.