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Khalim Conn-Kowlessar fb773fa635 slice 9: building parts with main-dwelling carve-out 
Thirteen building-parts features land: five cross-all-parts physical
aggregates (count, total_heat_loss_perimeter_m,
total_party_wall_length_m, total_floor_area_from_parts_m2,
avg_room_height_m) and eight Main-Dwelling-specific columns
(heat_loss_perimeter, party_wall_length, total_floor_area,
avg_room_height, has_room_in_roof, construction_age_band,
wall_construction, roof_construction). Main-Dwelling columns are
None when no part has identifier == 'Main Dwelling' — honest about
data quality rather than silently falling back to the first part.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-16 15:45:21 +00:00
..
domain slice 9: building parts with main-dwelling carve-out 2026-05-16 15:45:21 +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/.