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Khalim Conn-Kowlessar 171cb97c6e e2e: SAP-score regression test against both Elmhurst worksheets 
First end-to-end test running EpcPropertyData → cert_to_inputs →
calculate_sap_from_inputs → SapResult and comparing against the
Elmhurst worksheet's headline SAP rating (line 258).

Current state:
  000490 mid-terrace gas combi, time-clock keep-hot
    SAP rating:    57 = 57  ✓ exact integer match
    Continuous:    56.72 vs 57.40  → 0.7 points off (rounding noise)

  000474 end-terrace gas combi, PCDB Vaillant ecoTEC pro
    SAP rating:    55 vs 62  → 7 points UNDER
    Space heating: 12299.6 vs 10612.9  (+16%)
    Hot water:     3020.0  vs 2291.8   (+32%)

The 000474 gap localises to (a) the legacy hot-water cascade not
knowing about PCDB Table 3b combi loss (over-estimates HW by 32%) and
(b) likely a downstream space-heating-efficiency consequence. Both will
shrink once the §4 worksheet orchestrator + Table 3b are wired into
cert_to_inputs.

Tolerances set at the CURRENT gap so subsequent improvements show up
as tightening, not silent drift. The 000474 ceiling drops to ≤2 SAP
points once the worksheet §4 path lands in the mapper.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-20 16:27:04 +00:00
..
domain e2e: SAP-score regression test against both Elmhurst worksheets 2026-05-20 16:27:04 +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/.