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+# Handover — post S0380.74..76 + Appendix H integration
+
+Branch: `feature/per-cert-mapper-validation`. **HEAD `a532f75d`**.
+Predecessor: [`HANDOVER_POST_S0380_73_APPENDIX_H_BLOCKED.md`](HANDOVER_POST_S0380_73_APPENDIX_H_BLOCKED.md).
+
+## Slices committed this session (S0380.74..76)
+
+Long-standing Appendix H 1.81× over-count CLOSED, orchestrator
+wired into the HW cascade.
+
+| Slice | Commit | What |
+|---|---|---|
+| **S0380.74** | `3bf728ce` | Appendix H (H7) U3.3 monthly-integrated convention closes 1.81× over-count. SAP 10.2 internal ambiguity for (H7)m between p.75 (W/m² flux) and p.76's "from U3.3 in Appendix U" (kWh/m²/month integrated). Elmhurst follows U3.3; cascade was using U3.2. Fix: convert flux × hours/1000 inside (H9). **47/48 month-observations pin at <1e-4 kWh** across 4 fixtures (000565 + new A/B/C at `sap worksheets/Solar PV tests/`). |
+| **S0380.75** | `a9143d09` | Wire Appendix H orchestrator into water-heating cascade. New `solar_water_heating_monthly_kwh_override` param on `water_heating_from_cert`; helper `_solar_hw_monthly_override` in `cert_to_inputs.py` calls orchestrator with RdSAP 10 §10.11 Table 29 defaults + cert-lodged collector orientation/pitch/overshading from Elmhurst Summary §16.0. Extended `Renewables` + `EpcPropertyData` + extractor + mapper. **Cert 000565 HW pin: +271.84 → −68.96 kWh/yr (4× closer).** |
+| **S0380.76** | `a532f75d` | Combined-cylinder H12/H13 routing. Empirical pattern across 4 worksheets (cert 000565 H12=53 ≈ 160/3, cert A/B/C H12=37 ≈ 110/3) → combined-cylinder default H12 = ⅓ × cylinder volume per f-chart pre-heat-zone convention. Derives H12/H13 from `epc.has_hot_water_cylinder + sap_heating.cylinder_size`. **Cert 000565 solar Q_s: 268 → 283 kWh/yr (worksheet 281.35, Δ +1.73 = 0.6% error).** |
+
+**Test baseline at HEAD `a532f75d`:** 547 pass + 9 expected
+`test_sap_result_pin[000565-*]` cascade-gap fails.
+Pyright net-zero on every touched file.
+
+## Appendix H closure narrative (the trap that closed)
+
+The cascade vs worksheet ratio for cert 000565 was 1.81× — handover
+[`HANDOVER_POST_S0380_73_APPENDIX_H_BLOCKED.md`](HANDOVER_POST_S0380_73_APPENDIX_H_BLOCKED.md)
+concluded this was blocked on BS EN 15316-4-3:2017 access. That
+framing was wrong. The answer lives in the SAP 10.2 spec itself, in
+the cross-reference between (H7) and Appendix U §U3.3 that page 76
+makes verbatim.
+
+The diagnostic that closed the trap:
+
+1. **3 new solar-HW worksheets** generated by the user at
+   `sap worksheets/Solar PV tests/` (A-baseline-south-modest,
+   B-highY, C-lowY) — pooled with cert 000565 → 48
+   month-observations.
+2. **Empirical fit attempts** (Klein 6-coef refit, 9-coef extended
+   with XY interactions, multiplicative Y/X correction) all rejected
+   — none matched the worksheet's polynomial output without sign
+   flips or overfitting.
+3. **ChatGPT-mediated documentary research** ruled out hidden BRE
+   errata, SBEM-style Method 2 corrections, EN-style Im definitions
+   in W/m². Identified SAP 10.2 internal p.75 vs p.77 inconsistency
+   over the H8 overshading factor (real but wrong direction).
+4. **Back-solving the polynomial** at fixed X for Y_eff across 24
+   worksheet-positive observations revealed Y_eff/Y_cascade took
+   ONLY two distinct values: **0.7200 (exact)** for 30-day months,
+   **0.7440 (exact)** for 31-day months — i.e., `days × 24 / 1000`
+   exactly. No utilizability function, no missing constant — a
+   per-month unit-conversion factor.
+5. **Spec text resolution**: SAP 10.2 p.76 reads (H7)m as "Monthly
+   solar radiation per m² from U3.3 in Appendix U". §U3.3 (p.130)
+   defines the conversion `S_monthly = 0.024 × n_m × S(orient,p,m)`
+   — i.e. kWh/m²/month, NOT W/m². The cascade's `surface_solar_
+   flux_w_per_m2` returns the §U3.2 24h-avg flux in W/m² (verified
+   bit-exact against worksheet line 295: SE 90° Jan region 0 =
+   36.7938 W/m²). Equation H1 expected the U3.3 monthly integrated
+   value. The page-77 (H23) formula's `× hours / 1000` term
+   double-converts when (H7) is W/m² instead of kWh/m²/month.
+
+Full diagnostic in
+[`BRIEF_APPENDIX_H_EN_15316_RESEARCH.md`](BRIEF_APPENDIX_H_EN_15316_RESEARCH.md)
+§"Closure — 4-cert empirical investigation (2026-05-29)".
+
+## Cert 000565 state (HEAD `a532f75d`)
+
+| Pin | Cascade | Worksheet | Δ | Root cause |
+|---|---:|---:|---:|---|
+| **sap_score (int)** | **29** | **29** | **0 ✓ EXACT** | unchanged |
+| sap_score_continuous | 29.2905 | 28.5087 | +0.7818 | downstream of HW + space_heating |
+| ecf | 5.3073 | 5.3866 | −0.0793 | downstream |
+| total_fuel_cost_gbp | 4611.14 | 4680.26 | −69.12 | downstream |
+| co2_kg_per_yr | 6352.61 | 6447.63 | −95.02 | downstream |
+| **space_heating_kwh** | **59274.46** | **59008.35** | **+266.11** | **RR fold-in (RdSAP §3.10 detailed-RR geometry)** |
+| main_heating_fuel | 34867.33 | 34710.79 | +156.53 | follows space_heating (Δ × 1/COP) |
+| **hot_water_kwh** | **3668.54** | **3755.03** | **−86.49** | **demand cascade gaps (see below)** |
+| lighting | 1387.02 | 1384.84 | +2.19 | sub-spec |
+| pumps_fans | 255.00 | 252.52 | +2.48 | MEV PCDB record missing |
+
+### Appendix H solar Q_s — DONE (spec-pinned)
+
+| Quantity | Cascade | Worksheet | Δ |
+|---|---:|---:|---:|
+| Solar Q_s annual | 283.08 | 281.35 | **+1.73 kWh (0.6%)** |
+| Solar Q_s monthly | various | various | **<1e-4 kWh per month** for 47/48 observations across 4 fixtures |
+
+The orchestrator is now spec-pinned. Remaining HW pin gap is in the
+demand cascade, not in solar.
+
+## Open thread #1 — Cert 000565 HW demand cascade gaps (3 bugs)
+
+The −86 kWh HW residual is the net of three independent
+demand-cascade bugs that were previously masked by the +357 kWh "no
+solar credit" over-count:
+
+### A) Primary loss (59)m missing — biggest single fix (+1175 kWh)
+
+For HP main + HW cylinder routing, the cascade leaves
+`primary_loss_monthly_kwh = 0`. Worksheet line (59)m for cert 000565
+sums to **1174.79 kWh/yr**. SAP 10.2 §4 line 7700 + Table 3 (PDF
+p.159) defines primary loss for indirect cylinders. The current
+`_primary_loss_override` helper at
+[`cert_to_inputs.py:3322`](../rdsap/cert_to_inputs.py#L3322)
+gates on a `_primary_loss_applies(main, cylinder_present, hp_record)`
+check that returns False for cert 000565 — likely because the HP
+main has integral vessel info in PCDB but cert 000565's HP route is
+to an EXTERNAL cylinder (not integral). Audit `_primary_loss_applies`
+against SAP 10.2 §4 line 7700 specifically for the HP + external
+cylinder case.
+
+Closing this would shift cert 000565 HW pin from −86 → −86+1175 =
+**+1089** (over-shoot, but then the next two fixes bring it back).
+
+### B) (45)m energy_content over by 903 kWh
+
+| Component | Cascade | Worksheet |
+|---|---:|---:|
+| (45)m sum | 2189 | 1286 |
+| (62)m sum | 3181 | 3060 |
+
+Cascade `energy_content_monthly_kwh` over-counts by 903 kWh/yr.
+Likely candidates:
+- Occupancy formula difference (cert 000565 TFA 319.91 m², worksheet
+  uses occupancy from line 42)
+- Hot water demand per occupant — cert lodges "showers are both
+  electric and non-electric" per RdSAP Table 29 default for solar
+  systems, which may reduce the non-electric shower demand
+
+Audit `assumed_occupancy()` and the (42)-(45) cascade vs worksheet
+lines for cert 000565 specifically.
+
+### C) Storage loss (56) over by 98 kWh + missing (57)m solar adjustment
+
+Cascade (56) = 992 vs worksheet (56) = 894 (Δ +98).
+
+Worksheet additionally computes (57)m = (56) × (H13−H12)/H13 — the
+solar-adjusted storage loss. For cert 000565: (57) = 596.91 (vs
+(56) = 893.95). When solar HW is present, (62)m uses (57) NOT (56).
+Cascade currently passes (56) as `solar_storage_monthly_kwh_override`
+without the (H13−H12)/H13 reduction. Fix:
+- Audit cascade's storage loss formula at
+  [`cert_to_inputs.py:3289`](../rdsap/cert_to_inputs.py#L3289)
+  `_cylinder_storage_loss_override` — what's adding the extra 98?
+- Add (57)m solar adjustment when solar HW is present. The
+  multiplier is `(cylinder_volume_l - dedicated_solar_storage_l) /
+  cylinder_volume_l` derivable from the existing
+  `_hot_water_cylinder_volume_l(epc)` helper and the same H12 =
+  cylinder_volume / 3 rule used in `_solar_hw_monthly_override`.
+
+### Total impact estimate
+
+If all three close: HW pin = −86 + 1175 (A) − 903 (B) − 396 (C: 98
++ 298) = **−210** before re-pinning solar Q_s under the corrected
+(62)m. The Q_s itself would shift slightly since (H17)m changes.
+Expect HW pin to land within ±50 kWh of zero after all three +
+re-equilibrium.
+
+## Open thread #2 — Cert 000565 RR fold-in (space_heating +266)
+
+Unchanged. RdSAP §3.10 detailed-RR geometry / area formula not in
+repo. Largest energy residual after HW closes. Was already noted in
+predecessor handover.
+
+## Open thread #3 — Cert 000565 MEV pumps_fans (+2.48)
+
+Unchanged. PCDB MEV record not in repo (cert lodges PCDF 500755).
+Acquiring the PCDB MEV table is the gating step.
+
+## Open thread #4 — 12 gas-combi PV certs at +0.5..+1.6 PE
+
+Unchanged. S0380.73 cooking fix surfaced these — no worksheets
+available for these certs. Re-pinned at current residuals.
+
+## Open thread #5 — 5 SAP-integer-residual certs
+
+Unchanged. All API-only (no worksheets). User has agreed not to
+chase these without worksheet ground truth.
+
+## How to run the baseline
+
+```bash
+PYTHONPATH=/workspaces/model python -m pytest \
+    backend/documents_parser/tests/test_summary_pdf_mapper_chain.py \
+    backend/documents_parser/tests/test_elmhurst_extractor.py \
+    backend/documents_parser/tests/test_elmhurst_end_to_end.py \
+    domain/sap10_calculator/worksheet/tests/test_e2e_elmhurst_sap_score.py \
+    domain/sap10_calculator/worksheet/tests/test_appendix_h_solar.py \
+    domain/sap10_calculator/rdsap/tests/test_cert_to_inputs.py \
+    domain/sap10_calculator/rdsap/tests/test_golden_fixtures.py \
+    --no-cov -q
+```
+
+Expected: **547 pass + 9 expected `test_sap_result_pin[000565-*]`
+fails**.
+
+## Recommended next slice — primary_loss (59)m for HP + external cylinder
+
+Biggest single residual: +1175 kWh. Audit
+`_primary_loss_applies(main, cylinder_present, hp_record)` at
+[`cert_to_inputs.py`](../rdsap/cert_to_inputs.py) against SAP 10.2
+§4 line 7700. The HP + external cylinder case (cert 000565 shape:
+HP main 1 + gas combi main 2 servicing DHW via WHC 914 + cylinder
+present) likely falls outside the current gate. Test by adding the
+HP-external-cylinder path and verifying the primary_loss matches
+worksheet line (59)m for cert 000565.
+
+### What NOT to do
+
+- Don't re-investigate the Appendix H 1.81× over-count. Closed.
+- Don't propose more Appendix H polynomial / utilizability fixes.
+  S0380.74's U3.3 fix is the correct answer.
+- Don't try to close cert 000565's HW pin in one slice. The −86 is
+  the net of three independent demand-cascade bugs; each closes a
+  separate residual.
+- Don't widen pin tolerances or xfail residual gaps
+  ([[feedback-zero-error-strict]]). The 9 cert 000565 fails are
+  the work queue.
+- Don't reference SAP 10.3 ([[feedback-sap-10-2-only-never-10-3]]).
+
+## Standard workflow per slice
+
+1. Read SAP 10.2 spec page for the change — quote it in commit
+2. Probe current cascade output, identify exact spec-vs-cascade gap
+3. Write failing test FIRST (AAA structure)
+4. Implement helper / change
+5. Verify test passes
+6. Run full handover suite (command above)
+7. Check pyright on touched files — net-zero from baseline
+8. Commit with spec citation
+9. Update relevant memory if state changed
+
+## Files touched this session
+
+| File | Slice | Change |
+|---|---|---|
+| `domain/sap10_calculator/worksheet/appendix_h_solar.py` | S0380.74 | Rename `monthly_solar_energy_available_h9_w` → `_h9_kwh_per_month`, add `hours_in_month` param, apply U3.3 conversion |
+| `domain/sap10_calculator/worksheet/tests/test_appendix_h_solar.py` | S0380.74 | Cert 000565 (H24)m magnitude pin at abs < 1e-3 kWh; H9 + Y23 unit tests updated for kWh/month units |
+| `domain/sap10_calculator/docs/BRIEF_APPENDIX_H_EN_15316_RESEARCH.md` | S0380.74 | New "Closure" section with empirical evidence + root cause |
+| `domain/sap10_calculator/docs/HANDOVER_POST_4_CERT_EMPIRICAL.md` | S0380.74 | NEW — closure handover (points to brief) |
+| `datatypes/epc/surveys/elmhurst_site_notes.py` | S0380.75 | `Renewables` gains `solar_hw_collector_orientation` / `_pitch_deg` / `_overshading` |
+| `datatypes/epc/domain/epc_property_data.py` | S0380.75 | Same three fields added |
+| `datatypes/epc/domain/mapper.py` | S0380.75 | `from_elmhurst_site_notes` propagates the three new fields |
+| `backend/documents_parser/elmhurst_extractor.py` | S0380.75 | §16.0 section parsing |
+| `domain/sap10_calculator/worksheet/water_heating.py` | S0380.75 | `solar_water_heating_monthly_kwh_override` param on `water_heating_from_cert` |
+| `domain/sap10_calculator/rdsap/cert_to_inputs.py` | S0380.75, S0380.76 | Table 29 constants + `_solar_hw_monthly_override` + `_orientation_from_summary_string` + `_hot_water_cylinder_volume_l` + combined-cylinder H12/H13 derivation; demand_pass intermediate call |
+
+## Spec source quick-reference
+
+- **SAP 10.2 full specification**: `domain/sap10_calculator/docs/specs/sap-10-2-full-specification-2025-03-14.pdf`
+  - Appendix H (solar thermal): p.74-78
+    - Equation H1 + Y/X definitions: p.75
+    - (H7) "from U3.3" + (H9) formula: p.76
+    - (H22)-(H24) worksheet: p.77
+    - Table H1 (collector params), Table H2 (overshading), Table H3 (coefficients): p.78
+  - Appendix U §U3.2 (W/m² flux polynomial): p.128
+  - Appendix U §U3.3 (kWh/m²/month integrated): p.130
+  - §4 line 7700 + Table 3 (primary loss): p.159
+  - Table 12d/12e (monthly electric factors): p.195-196
+- **RdSAP 10 specification**: `domain/sap10_calculator/docs/specs/rdsap-10-specification.pdf`
+  - §10.5 Table 28 (cylinder size codes → litres): p.[lookup]
+  - §10.11 Table 29 (solar panel defaults): p.58
+- **S10TP-04** (BRE Appendix H change note): `domain/sap10_calculator/docs/specs/sap10 technical papers/S10TP-04 - Change to Appendix H to include solar space heating - V1_3.pdf`
+- **SAP 10.3** at `domain/sap10_calculator/docs/specs/sap-10-3-full-specification-2026-01-13.pdf`: **DO NOT reference** (project tracks 10.2 only per [[feedback-sap-10-2-only-never-10-3]])
+
+## Memory updated this session
+
+- `project_cert_000565_recovery_state` — Appendix H closure + S0380.75/76 outcomes
+- `MEMORY.md` — index entry refreshed
diff --git a/domain/sap10_calculator/docs/NEXT_AGENT_PROMPT_POST_S0380_76.md b/domain/sap10_calculator/docs/NEXT_AGENT_PROMPT_POST_S0380_76.md
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index 00000000..29d71ac5
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+++ b/domain/sap10_calculator/docs/NEXT_AGENT_PROMPT_POST_S0380_76.md
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+# Next-agent prompt — post S0380.76
+
+Branch: `feature/per-cert-mapper-validation`.
+HEAD: `a532f75d`.
+
+Read these in order before any tool call:
+
+1. [`HANDOVER_POST_S0380_76.md`](HANDOVER_POST_S0380_76.md) (full state)
+2. [`BRIEF_APPENDIX_H_EN_15316_RESEARCH.md`](BRIEF_APPENDIX_H_EN_15316_RESEARCH.md) §"Closure" (Appendix H lesson — for reference, not action)
+
+Also load these memories before starting:
+
+- `project_cert_000565_recovery_state` — cert 000565 slice history + current pin state
+- `project_golden_coverage_state` — cohort state
+- `feedback_sap_10_2_only_never_10_3` — **CRITICAL** — never reference SAP 10.3 spec
+- `feedback_verify_handover_claims` — verify spec citations before implementing
+- `feedback_spec_floor_skepticism` — "spec-precision floor" framing usually hides a real spec bug
+- `feedback_zero_error_strict` — pyright net-zero per touched file
+- `feedback_commit_per_slice` — one slice = one commit
+- `feedback_spec_citation_in_commits` — quote spec text + page in commit messages
+- `feedback_aaa_test_convention` — every new test uses `# Arrange / # Act / # Assert`
+- `feedback_e2e_validation_philosophy` — component pins at <1e-3; SAP integer delta=0; no adaptive ceilings
+
+## State summary
+
+**Cumulative session result:** Long-standing Appendix H 1.81×
+over-count CLOSED. Orchestrator wired into HW cascade. Test
+baseline preserved at **547 pass + 9 expected
+`test_sap_result_pin[000565-*]` cascade-gap fails**.
+
+Cert 000565 SAP integer rating is **EXACT (29)**. The 9 sub-pins
+are now visible work-queue items rather than blocked-on-external-
+data:
+
+| Pin | Δ kWh/yr | Root cause |
+|---|---:|---|
+| sap_score (int) | **0 ✓ EXACT** | unchanged |
+| hot_water_kwh_per_yr | **−86.49** | Three demand-cascade bugs (see below). Solar Q_s itself is spec-pinned at Δ +1.73 of worksheet. |
+| space_heating_kwh | +266.11 | RR fold-in (RdSAP §3.10 detailed-RR geometry) |
+| main_heating_fuel | +156.53 | Follows space_heating via 1/COP |
+| co2 | −95.02 | Downstream of HW |
+| total_fuel_cost | −69.12 | Downstream of HW |
+| ecf | −0.0793 | Downstream |
+| sap_score_continuous | +0.7818 | Downstream |
+| lighting | +2.19 | sub-spec |
+| pumps_fans | +2.48 | MEV PCDB record missing |
+
+## Recommended next slice — primary_loss (59)m for HP + external cylinder
+
+**Biggest single residual fix: +1175 kWh.**
+
+For cert 000565 (HP main 1 + gas combi main 2 servicing DHW via
+WHC 914 + cylinder present), the cascade leaves
+`primary_loss_monthly_kwh = 0`. Worksheet line (59)m sums to
+1174.79 kWh/yr.
+
+SAP 10.2 §4 line 7700 + Table 3 (PDF p.159) defines primary loss
+for indirect cylinders. The current `_primary_loss_override` helper
+at
+[`cert_to_inputs.py`](../rdsap/cert_to_inputs.py)
+(search for `def _primary_loss_override`) gates on
+`_primary_loss_applies(main, cylinder_present, hp_record)` which
+returns False for cert 000565 — likely because the HP main has
+integral vessel info in PCDB but cert 000565's HP routes to an
+EXTERNAL cylinder.
+
+### Audit steps
+
+1. Read SAP 10.2 §4 around line 7700 + Table 3 verbatim — what
+   determines primary loss for HP + external cylinder?
+2. Probe cert 000565: what does `_primary_loss_applies` return and
+   why? Step through with `main = epc.sap_heating.main_heating_
+   details[0]`, `cylinder_present = True`, `hp_record = heat_pump_
+   record(main.main_heating_index_number)`.
+3. Compare against cert worksheet line (59)m monthly values
+   (already extracted in handover):
+   ```
+   (59)m = 128.38, 115.95, 128.38, 124.24, 128.38, 41.92,
+           43.31, 43.31, 41.92, 128.38, 124.24, 128.38
+   ```
+   Sum = 1174.79.
+4. Write failing test pinning `primary_loss_monthly_kwh` for cert
+   000565 to worksheet line (59)m at abs < 1e-3 kWh.
+5. Implement the HP-external-cylinder path in
+   `_primary_loss_applies` or its caller.
+6. Verify cert 000565 HW pin moves from −86 → expected new value
+   (likely around +1089 before the next two demand fixes land).
+
+### Why this is one slice, not three
+
+The three demand-cascade bugs ((45)m over by 903, (59)m under by
+1175, (56)/(57)m mismatch by ~396) are INDEPENDENT. Each closes a
+separate spec rule:
+- (45)m → audit `assumed_occupancy()` + (42)-(45) HW demand
+  cascade — separate slice, possibly the showers-electric-and-non-
+  electric Table 29 default
+- (59)m → THIS SLICE, primary loss for HP + external cylinder
+- (56)/(57)m → next-next slice: storage loss formula audit + (57)m
+  solar-adjusted routing
+
+Land them in priority order. Each will move the HW pin in a
+predictable direction; recheck after each.
+
+## What NOT to do
+
+- **Don't re-investigate Appendix H 1.81× over-count.** CLOSED in
+  S0380.74. The U3.3 unit-convention fix is the correct answer.
+- **Don't propose more polynomial / utilizability fixes.**
+- **Don't try to close cert 000565 HW pin in one slice.** Three
+  independent demand-cascade bugs to fix; each is its own slice.
+- **Don't widen pin tolerances or xfail residual gaps** per
+  [[feedback-zero-error-strict]]. The 9 cert 000565 fails are the
+  work queue.
+- **Don't reference SAP 10.3** ([[feedback-sap-10-2-only-never-10-3]]).
+- **Don't chase the 12 gas-combi PV certs or the 5 SAP-residual
+  certs without worksheets** — user has explicitly de-prioritised.
+
+## Standard workflow per slice
+
+1. Read SAP 10.2 spec page for the change — quote it in commit
+2. Probe current cascade output, identify exact spec-vs-cascade gap
+3. Write failing test FIRST (AAA structure)
+4. Implement helper / change
+5. Verify test passes
+6. Run full handover suite (command below)
+7. Check pyright on touched files — net-zero from baseline
+8. Commit with spec citation
+9. Update relevant memory if state changed
+
+## How to run the baseline
+
+```bash
+PYTHONPATH=/workspaces/model python -m pytest \
+    backend/documents_parser/tests/test_summary_pdf_mapper_chain.py \
+    backend/documents_parser/tests/test_elmhurst_extractor.py \
+    backend/documents_parser/tests/test_elmhurst_end_to_end.py \
+    domain/sap10_calculator/worksheet/tests/test_e2e_elmhurst_sap_score.py \
+    domain/sap10_calculator/worksheet/tests/test_appendix_h_solar.py \
+    domain/sap10_calculator/rdsap/tests/test_cert_to_inputs.py \
+    domain/sap10_calculator/rdsap/tests/test_golden_fixtures.py \
+    --no-cov -q
+```
+
+Expected: **547 pass + 9 expected `test_sap_result_pin[000565-*]`
+fails**.
+
+## Memory hygiene
+
+After the next slice, update:
+- `project_cert_000565_recovery_state` — add primary_loss closure
+  state + which next demand-cascade bug to tackle.
+
+Good luck.