diff --git a/.claude/skills/expand-sap-accuracy-corpus/worklist.md b/.claude/skills/expand-sap-accuracy-corpus/worklist.md
index 681a2748..58f3b984 100644
--- a/.claude/skills/expand-sap-accuracy-corpus/worklist.md
+++ b/.claude/skills/expand-sap-accuracy-corpus/worklist.md
@@ -130,9 +130,16 @@ A second `modelling_e2e` run (filter `task_source='modelling_e2e' AND job_starte
 **① ✅ FIXED — `KeyError: BuildingPartIdentifier.EXTENSION_1` (14 props, the dominant
 failure).** A **Landlord Override** targeted `extension_1` but the lodged/predicted EPC
 had no such part; `overlay_applicator.apply_simulations` indexed `parts_by_id[identifier]`
-unguarded → crashed the whole property. Fixed: skip the orphaned part (`.get` + `None`
-guard). +regression test `test_override_targeting_a_part_absent_from_the_epc_is_skipped`.
-Not a mapper gap — a modelling-overlay bug. The 14 (pid / uprn):
+unguarded → crashed the whole property. Root cause is a **numbering mismatch**: the
+override's `building_part` is a positional index (0=main, 1=extension 1…, ADR-0004), but
+the gov-API EPC can label that slot differently (720142's 2nd part lodged as `other`, no
+`extension_1`). Fix (per product decision — *honour the override, don't drop it*):
+`_resolve_part` falls back to the EPC's part **at that position** when the semantic label
+is absent, so the landlord's correction lands; only a position the EPC models no part at
+is skipped (no geometry to model a wholly-absent part). +regression tests
+`test_override_for_an_absent_semantic_part_lands_on_the_part_at_that_position` /
+`test_override_with_no_part_at_that_position_is_skipped`. Not a mapper gap — a
+modelling-overlay bug. The 14 (pid / uprn):
 710295/100020458237, 710482/100020450179, 713040/100020404702, 715575/100020397529,
 715894/100020604961, 717435/22010468, 720142/100020383544, 720560/100021921443,
 721241/100020453651, 724945/100021915421, 725415/100020404036, 726517/100020631307,