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Khalim Conn-Kowlessar 82627ebbfa Cohort residual slice 9: u_rr_default_all_elements — RdSAP10 Table 18 col (4) 
Adds the "Room-in-roof, all elements" U-value lookup keyed by age band,
with Scotland override for age K per Table 18 footnote (2). This is the
fallback U-value for the §3.9 Simplified RR cascade when no detailed
per-surface lodgement is available (the "as built / unknown" path per
footnote (1)).

Tests cover the spec table verbatim:
  - A-D 2.30, E 1.50, F 0.80, G 0.50, H 0.35, I 0.35, J 0.30,
  - K 0.25 (England) / 0.20 (Scotland), L 0.18, M 0.15.
Mid-range fallback 0.50 (matching age G) when neither age band nor
country lodged — robustness contract identical to u_roof.

Reference: RdSAP 10 (10-06-2025) Table 18 page 45.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-22 19:16:15 +00:00
..
domain Cohort residual slice 9: u_rr_default_all_elements — RdSAP10 Table 18 col (4) 2026-05-22 19:16:15 +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/.