feat(#94): IMP-94 u1~u6 Layer A region/content marker injection (stamper + render_slide chain + 4 zones_data.append placement_markers + 35 parity tests)

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u1 (src/region_marker_stamper.py): deterministic root-div stamper injecting data-region-id + data-content-unit-id onto each family-partial root div anchored by data-template-id. Idempotent (re-stamp = no-op), AI=0, additive only, empty/None markers no-op, F9/F29 frame-slot axis preserved.

u2 (src/phase_z2_pipeline.py render_slide chain): _stamp_region_markers chained after IMP-56 u9 _stamp_zone_html. Marker source = zone.get("placement_markers") or [] — Codex #16 P4b crash risk closed via the or-[] call-site fallback.

u3 (_derive_placement_markers helper): projects PlacementPlan.slot_assignments[] → list[dict] carrying region_id + content_unit_id + frame_slot_id (frame_slot_id reserved for #96 89-d). Live B4 path emits at primary zones_data.append.

u4 (3 non-live zones_data.append defaults): placement_markers: [] at IMP-30 u4 empty-shell, IMP-86 u1 adapter_needed, post-loop unrenderable plan-record paths — uniform zone shape, stamper no-op surface.

u5/u6 (tests/test_phase_z2_imp94_marker_parity.py): 33 hard tests + 2 cross-axis skip-if-anchor-absent (Emergency P4/P4b future axis). Coverage: 13 family-partial root anchors, F29 + F9 frame-slot preservation, idempotence, live render_slide stamping, P4b empty-marker no-crash, MDX 01 strip-attr parity, trace-to-DOM parity.

Disjoint from #96 (data-frame-slot-id) by attribute name. SPEC anchor: docs/architecture/PHASE-Z-CONTENT-OBJECT-SUBZONE-SPEC.md §6.4 + §7.2 (Layer A read targets + render-path activation).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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2026-05-27 08:15:08 +09:00

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