Model/packages
Khalim Conn-Kowlessar 195336b7e1 slice 15d: +50 features (gap fill + secondary building part); drop 2 derived
Removes:
  - environmental_impact_current (SAP-derived rating, leaks into co2 target)
  - energy_rating_average (average of sap_score + potential, direct leak)

Adds:
  Doors            draughtproofed_door_count, insulated_door_u_value
  Hot water        cylinder_insulation_type, cylinder_thermostat,
                   secondary_heating_type
  Ventilation      mechanical_vent_duct_placement, _duct_insulation,
                   _duct_insulation_level, _measured_installation
  Lighting         low_energy_fixed_lighting_bulbs_count,
                   fixed_lighting_outlets_count,
                   low_energy_fixed_lighting_outlets_count
  Windows          window_avg_glazing_gap_mm, window_avg_frame_factor,
                   window_pct_permanent_shutters_insulated
  Main dwelling    room_in_roof_floor_area_m2, alternative_wall_count,
                   alternative_wall_area_m2, flat_roof_insulation_thickness_mm,
                   wall_thickness_measured
  Element counts   wall_count, roof_count, floor_count,
                   main_heating_count_elements, main_heating_controls_present
  Wind             wind_turbine_hub_height_m, wind_turbine_rotor_diameter_m
  Flat             flat_unheated_corridor_length_m
  Addendum         addendum_stone_walls, addendum_system_build,
                   addendum_numbers_count
  LZC              lzc_energy_sources_count
  Secondary part   secondary_dwelling_present + 11 fabric features
                   (wall/roof/floor construction + insulation + thickness
                   + area + heat-loss perimeter) + other_building_parts_count

Wires through schema -> domain -> mapper: adds Addendum dataclass,
lzc_energy_sources, mechanical_vent_duct_insulation_level. Also fixes
_measurement_value to accept raw dicts (from_dict left some Measurement
fields as dict when they weren't typed as a dataclass).

Results at N=25,000 2026 RdSAP certs:
  sap_score          MAPE=0.043  sMAPE=0.036  R^2=0.891
  co2_emissions      sMAPE=0.106  R^2=0.929
  peui_raw           MAPE=0.087  sMAPE=0.084  R^2=0.860
  peui_ucl           MAPE=0.079  sMAPE=0.076  R^2=0.866
  space_heating_kwh  MAPE=0.112  sMAPE=0.108  R^2=0.947
  hot_water_kwh      MAPE=0.071  sMAPE=0.069  R^2=0.854  (+0.082 R^2 vs 15b)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-17 10:13:03 +00:00
..
domain slice 15d: +50 features (gap fill + secondary building part); drop 2 derived 2026-05-17 10:13:03 +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

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/.