SapAlternativeWall.u_value (heat_transmission.py:1616), .wall_thickness_mm
(:1645) and .is_basement (:1618) were read by the calculator but had no column,
so they dropped on save. Latent today (0 gov-API certs lodge them — live only on
the Elmhurst/site-notes path), but is_basement is the nastiest shape: it does not
null out, it FLIPS meaning (True -> None -> is_basement_wall reads False),
silently switching off the RdSAP §5.17 / Table 23 basement-wall U path.
Add alt_wall_{1,2}_{u_value,thickness_mm,is_basement} to EpcBuildingPartModel,
write in from_domain, reconstruct in _to_alt_wall, and drop the three
_UNPERSISTED_ALLOWLIST entries so the structural guard enforces them. is_basement
is nullable (None "not stated" != False "not a basement"; a NOT NULL DEFAULT
false re-enables the code-6 heuristic — same reasoning as #1661's wall_is_basement).
Companion assessment-model migration: six nullable columns on epc_building_part
(deploy gate). Round-trip + field-coverage guard green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
EpcPropertyModel.uprn was `Optional[int]`, which SQLModel maps to INTEGER, so a
real 11/12-digit UPRN (e.g. 10000452538) overflowed int32 and hard-failed the
insert with NumericValueOutOfRange — a failure on EVERY real-cert save, masked
because the round-trip fixtures use small fake UPRNs. The FE `property.uprn` is
already bigint; pin the column to BigInteger so ours matches (backend-only, no
migration). Verified: uprn 10000452538 saves + reloads.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
SapHeating.cylinder_heat_loss is read by the calculator (cert_to_inputs §4
cylinder loss) but had no column, so it was silently dropped on save: a dwelling
reloaded from Postgres lost its lodged cylinder loss and fell back to the Table
2b age-band default — worst case -15.53 SAP over the corpus round-trip (#1665).
Add heating_cylinder_heat_loss (nullable double precision) to EpcPropertyModel,
write it in from_domain and reconstruct it in the SapHeating compose path,
mirroring heating_cylinder_volume_measured_l. Remove the now-false
_UNPERSISTED_ALLOWLIST entry ("dormant — not read by the calculator") so the
ADR structural guard enforces it. Verified: worst cylinder cert 10091630692
round-trip -15.53 -> 0.0000.
Companion assessment-model migration (heating_cylinder_heat_loss column) must
land + be applied per-environment before the backend deploys (deploy gate).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The previous commit staged these two files at `git mv` time but never
staged the edits that followed, so they landed with their pre-refactor
content: `class PashubService` and `from backend.pashub_fetcher...`
imports that no longer resolve. Local runs passed because the working
tree was correct; CI collected the committed tree and failed with
ModuleNotFoundError: No module named 'backend.pashub_fetcher'.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The service was the last one living wholly under backend/. It now follows
the same layering as abri and the other newer services:
domain/pashub_fetcher/ core file classification, subfolders
infrastructure/pashub_fetcher/ PasHub client, token getter, wire DTOs
orchestration/ PashubFetcherOrchestrator (was PashubService)
applications/pashub_fetcher/ lambda handler, trigger request, dev tooling
core_files.py is split along the layer boundary: the domain module keeps the
filename/evidence-category classification rules and no longer imports
infrastructure.postgres, while the CoreFiles -> FileTypeEnum translation moves
to infrastructure/pashub_fetcher/core_file_types.py.
Tests move into the tests/ tree by layer. Note this puts them in the only
suite CI currently runs (unit_tests.yml is disabled), so these 73 tests now
execute on PRs for the first time; they were previously reachable only via
the legacy pytest.ini testpaths.
sharepoint_renamer's image now copies just domain/pashub_fetcher/ rather than
the whole service, since SharepointSubfolders is all it needed.
Behaviour is unchanged. tests/ goes 9927 -> 10000 passed (+73, exactly the
tests that moved in); the legacy suite keeps its same 17 pre-existing failures
and 11 errors. tests/test_lambda_packaging.py confirms both changed
Dockerfiles still copy their handler's full import closure.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
`SapRoomInRoof.detailed_surfaces` is read by the SAP calculator
(heat_transmission.py:590, :690-696, :1311-1470) but has no Postgres column, so
the per-surface geometry is silently discarded on save. Without it the cascade
abandons the RdSAP 10 §3.10 "Detailed" route — each surface at its own Table 17 /
Table 4 U-value — and bills the whole notional roof shell at the Table 18
column (4) age-band default, typically 2.30 W/m2K for pre-1976 stock.
Measured on the committed 1000-cert RdSAP-21.0.1 corpus: 108 certs (10.8%) lodge
RIR geometry across 118 building parts; 107 of 108 score differently when it is
dropped; 15 change EPC band; worst case -15.21 SAP (uprn 10012119141, top-floor
maisonette, band E -> F). Larger in both population and magnitude than the
rafter_insulation_thickness gap that opened #1656.
Doc only — the Drizzle tables are owned by Hestia-Homes/assessment-model and the
model-side wiring follows once they exist.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
RdSAP 10 item 2-3(h) "another dwelling above" is U=0 (spec p.45: "There is no
heat loss through the roof of a building part that has the same dwelling above
or another dwelling above"). gov-API `roof_construction = 3` is that code, but
the mapper labelled it "Pitched (slates/tiles), no access to loft" (which is
code 5), so the per-part party override at heat_transmission.py:1172 never
matched and the part fell through to the dwelling_type-label-only
has_exposed_roof heuristic.
190 of the 200 corpus code-3 parts sit at index 0 and are already suppressed by
`_cert_lodges_exposed_roof` off the roof_insulation_location == "ND" signal. The
unmitigated set is the 10 parts at index > 0, where extensions default to
exposed and were billed a phantom pitched roof. Also removes a latent PV defect:
the bogus "Pitched" prefix satisfied `is_pitched` and divided PV array area by
cos(35 deg), inflating kWp.
Shipped with the stairwell fix so the corpus pin moves once: within-0.5
78.8% -> 79.6%, SAP MAE 0.626 -> 0.611, PE MAE 2.9 -> 2.7.
The roof change alone trades 4 certs out of the +-0.5 band for 2 in (one moving
4.4 SAP closer). Those 4 were investigated and are NOT a masked bug: the corpus
error distribution is symmetric (mean +0.076, median +0.03, sigma 1.606; 112
certs above +0.5 vs 102 below), ground-floor flats show 7 positive / 8 negative
with no excess over the null, and closing them needs HLC changes of 2.3-5.6% —
below the ~8.8% noise floor of the RHI anchor, calibrated on the 76 certs whose
SAP is exact (space-heating ratio 1.062 +/- 0.088).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
RdSAP 10 §5.9 "U-values of sheltered walls" (PDF p.43): a wall between a
flat/maisonette and an unheated buffer takes SAP 10.2 §3.3's U = 1/(1/U0 + Ru),
and Ru depends on the BUFFER TYPE — "Use Ru = 0.5 m²K/W for corridors and
Ru = 2.1 m²K/W for stairwell."
The buffer type is lodged on `SapFlatDetails.heat_loss_corridor` (0-based per
item 1-11, PDF p.70: 0 none, 1 heated, 2 unheated corridor, 3 unheated
stairwell). That field was read NOWHERE under domain/ — corridor presence was
inferred only from a lodged sheltered alternative wall — so every sheltered wall
took the corridor 0.5 and every stairwell flat over-billed its sheltered wall,
under-rating the dwelling.
Distinct from `_SHELTERED_GABLE_ADDED_RESISTANCE_M2K_W`, which is RdSAP 10
Table 4 (p.22) for a room-in-roof sheltered gable — same 0.5, different rule,
deliberately untouched.
Corpus gauge ratcheted UP: within-0.5 78.8% -> 79.8% (+10 certs), SAP MAE
0.626 -> 0.613, PE MAE 2.9 -> 2.8. Failure set and pyright count identical to
main. Portfolio 824 is stairwell-heavy (60 properties at code 3); property
749898 over-bills 4.44 W/K on a 48 m2 flat.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
RdSAP 10 §3.12 (PDF p.26), the flats/maisonettes floor rules: "There is no heat
loss through the floor if there is another flat below. Otherwise the floor area
of the flat ... is ... a semi-exposed floor if there are unheated premises below
it (e.g. an enclosed garage) ... Semi-exposed (sheltered) floors are treated as
if they were fully exposed." §5.13 (p.48) confirms the U-value identity: Table 20
applies to exposed and semi-exposed alike.
API floor_heat_loss=2 -> floor_type "To unheated space" set no exposure signal,
so on a mid-/top-floor flat the dwelling-level heuristic (has_exposed_floor=False,
assuming a heated dwelling below) went unopposed and the ENTIRE floor was billed
at 0 W/K. 11 properties across portfolios 796+824, mean +4.02 SAP, 10 of 11
over-rating — we judged dwellings more efficient than the accredited assessment
and would withhold retrofit measures they need.
Exemplars: 750018 space heating -53.2% -> -8.1% vs the cert's own RHI figure,
SAP +8.22 -> +1.16; 749898 -43.0% -> +0.9%, SAP +6.29 -> -1.11.
SCOPED TO FLATS ON PURPOSE. §3.12 is the flats/maisonettes section, and the
accredited Elmhurst worksheet disagrees with Table 20 for a house: golden cert
7536-3827-0600-0600-0276 (detached) lodges floor_heat_loss=2 on its Main part and
the worksheet bills it on the BS EN ISO 13370 ground-floor cascade at U 0.97, not
Table 20's 1.20. An unscoped mapper-level fix broke that pin and the
uprn_100050881708 accuracy pin; the scoped fix leaves both untouched.
No regressions: identical failure set and pyright count vs main; the RdSAP-21.0.1
accuracy corpus gauge is unchanged at 78.8% within-0.5 / MAE 0.625 (correctly —
all 7 corpus certs lodging code 2 are houses).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
RdSAP 10 §5.17 / Table 23. `wall_is_basement` is not a lodged U-value — it is a
disambiguation flag selecting WHICH RdSAP default applies, so unlike
wall/roof/floor_u_value it must survive the round-trip.
Code 6 is canonically SYSTEM-BUILT and the gov-API path infers "basement" from a
code-6 heuristic; the Elmhurst site-notes mapper sets wall_is_basement=False
precisely to defeat it. Dropping the field inverted the answer — a system-built
wall came back as a basement wall, dragging the whole ground floor onto the
Table 23 basement-floor U-value via `has_basement`.
Declared on no RdSAP schema, so it never arrives via the gov API; the earlier
corpus scan showing 0 occurrences measured the wrong population. The Elmhurst
site-notes path sets it and those EPCs are persisted
(scripts/wchg_elmhurst_ingest.py).
Nullable is load-bearing: None = "not stated, use the heuristic", False =
"explicitly system-built, do not".
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add `rafter_insulation_thickness` to `EpcBuildingPartModel` (JSONB, matching the
sibling thickness columns so Union[str, int] survives) and wire it through
`from_domain` / `_to_building_part`.
Property 749719 lodges "250mm" -> Table 16 col (2) U 0.23. Dropped, the roof
billed at U 2.30 — a 10x error worth -9.8 SAP (lodged 73, calculated 63.2) that
moved the dwelling a whole band, C -> D, and drew a 9.63-point loft-insulation
recommendation on a roof rated 4/5 by the assessor.
The sibling wall/roof/floor_u_value and wall_is_basement fields have the same
drop but are deliberately NOT persisted: they are full-SAP artefacts and we
re-model as RdSAP, which uses default U-values. Their allow-list entries are
re-justified rather than removed — the previous "not read by the calculator" was
stale and is what hid this drop.
Requires the Drizzle migration in Hestia-Homes/assessment-model to land FIRST;
without the column, EPC reads fail outright.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
RdSAP 10 §5.11.2 — a roof insulated at rafters lodges its thickness in
`rafter_insulation_thickness`, not `roof_insulation_thickness`. The field had no
DB column, so it was mapped from the gov-EPC API and silently dropped on save;
every at-rafters roof then fell back to the Table 18 col (2) unknown-thickness
default (2.30 W/m²K for bands A-D — the spec's *uninsulated* value).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
0390's floor+ASHP package reaches post 68.772, which publishes as 69 = band C,
so under ADR-0064 it now meets the goal and stops before low-energy lighting —
the same over-purchase the ADR removes, one level up at the package. 0380 fires
the same three measures with identical trigger attributes, so every assertion
stands unchanged, and it lands at post 74.4, clear of a band floor.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The modelling_e2e handler models one property per run_modelling call, so a
per-property "no persisted baseline" line would be one per property across a
whole re-model. The harness has no Baseline stage by design and cannot drift
from one, so it now establishes its own the way the Baseline orchestrator
would; the Postgres-backed lane is where the assertion has something to catch.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
ADR-0065 is claimed by Scenario Export on the open #1546; this branch is the
later of the two, so it moves.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
