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Khalim Conn-Kowlessar ebceb4bf2b slice 12: ventilation flat features 
Four ventilation features: mechanical_ventilation (categorical
SAP10 code, 0=natural through 6=positive-input-from-outside per
epc_codes.csv mechanical_ventilation enum), mechanical_vent_duct_type
(categorical), blocked_chimneys_count (int), and pressure_test
(int — air-tightness SAP10 code).

Pulled from top-level EpcPropertyData fields; ventilation on SAP10
API EPCs sits on the certificate directly, not on the
sap_ventilation block (which is site-notes-only).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-16 16:09:53 +00:00
..
domain slice 12: ventilation flat features 2026-05-16 16:09:53 +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/.