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4d838bb03c
Adds SAP10.2 §C tracer-bullet infiltration model as a new physics-as-feature column alongside envelope_heat_loss_w_per_k. ACH = structural baseline (0.35 masonry / 0.25 timber-or-system-built) + open chimneys at 40 m³/h each minus a draught-proofing reduction scaled by window_pct_draught_proofed, then volumed and converted to W/K. Targets the d0 catastrophic-low-SAP tail where chimney + leakage signals dominate but envelope conduction alone under-counts heat loss. Scope deferred to follow-ups: MVHR/MEV factors (mechanical_ventilation is 100% null in the corpus), pressure-test override (pressure_test also 100% null - slice 18e mapper fix), open flues / passive vents / flueless gas fires (sap_ventilation sparsely populated). |
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| .. | ||
| domain | ||
| fetchers | ||
| repos | ||
| utils | ||
| 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/.