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Khalim Conn-Kowlessar 9f6f7608b9 slice 15b: +18 features — heating type code, hot water, windows, flat, supply 
Heating: primary_sap_main_heating_code (the SAP10 heating-system enum was the
single biggest missing input), primary_emitter_temperature,
primary_main_heating_fraction.

Hot water: immersion_heating_type, shower_outlet_count.

Windows: window_pct_living, window_pct_external, window_pct_permanent_shutters
(area-weighted shares parallel to existing window aggregates).

Dwelling: conservatory_type, has_heated_separate_conservatory.

Flat-only block (sap_flat_details): flat_level, flat_top_storey,
flat_storey_count, flat_location, flat_heat_loss_corridor (int sentinels
like '20+' coerce to None for the categorical features).

Energy supply: meter_type, pv_connection, wind_turbines_terrain_type.

Also plumbs `air_tightness` EnergyElement, `sap_flat_details` and
`has_heated_separate_conservatory` through the 21.0.1 mapper path (they were
silently None before).

Results at N=25,000 2026 RdSAP certs:
  sap_score          MAPE=0.044  sMAPE=0.038  R^2=0.884  (+0.045 R^2 vs 15a)
  co2_emissions      sMAPE=0.108  R^2=0.925
  peui_raw           MAPE=0.092  sMAPE=0.088  R^2=0.849
  peui_ucl           MAPE=0.081  sMAPE=0.078  R^2=0.860
  space_heating_kwh  MAPE=0.111  sMAPE=0.108  R^2=0.945
  hot_water_kwh      MAPE=0.081  sMAPE=0.079  R^2=0.772

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-17 00:08:11 +00:00
..
domain slice 15b: +18 features — heating type code, hot water, windows, flat, supply 2026-05-17 00:08:11 +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/.