Research Assistant 1a9ad1d147 P1: backmatter boundary redesign — ref-anchored partition replaces second _reconcile_tail_spread ... reference_zone is the only hard boundary. Pre-ref disclosure headings (CRediT, Ethics, Declaration) are normalized as local same-column runs — they never set global boundaries. Four contracts enforced (Contract A-D in spec). - 13 new helpers in ocr_document.py: _has_verified_reference_zone, _partition_by_reference_zone, _classify_same_page_block, _normalize_reference_roles_from_partition, _normalize_pre_ref_disclosure_runs, _build_tail_boundary_from_ref_partition, etc. - infer_zones() stores effective_end_page for trimmed reference extent - normalize_document_structure(): ref-partitioned path replaces second _reconcile_tail_spread; _promote_tail_body_candidates/_assign_tail_spread_ownership skipped when active - 20 tests in test_backmatter_boundary.py - 322/322 tests pass		2026-06-28 01:13:54 +08:00
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checklists	feat(ocr): tail regime remediation + style-aware heading profiles + boundary detection	2026-06-05 22:47:13 +08:00
plans	docs: apply 4 must-fix review changes to container admission spec+plan	2026-06-26 22:25:23 +08:00
specs	P1: backmatter boundary redesign — ref-anchored partition replaces second _reconcile_tail_spread	2026-06-28 01:13:54 +08:00