12 — GPT MCP-Readable Checkpoint (in-package copy)

(Identical short proof also at knowledge/dev/reports/architecture/checkpoint-registries-pivot-layer-graph-count-finalize-2026-06-03.md.)

• Macro: REGISTRIES_PIVOT_DYNAMIC_LAYER_GRAPH_AND_COUNT_CONTRACT_FINALIZE
• Final status: PARTIAL
• Live mutation: YES — 1 additive read-only view (v_registries_pivot_node_contract); 0 base-table/count mutation (pd_hash unchanged 1e31696f3cb47d244c578bd9390ca56d).
• Layer definition readback: PASS (KB-readable, no repair).
• Parent graph: APPLY-READY, rehearsed-clean live (37 flat → 24 roots/6 parents/0 dangling; entry==exit hash). Commit = operator (fires designed count refresh).
• PIVOT_MISSING: PIV-500 (grand total, needs engine ext), PIV-30x (orphan 59/phantom 289/drift 3/sys-issues 207,940), PIV-31x (IU 219/KG 2,259) — surfaced, held.
• Backend contract: LIVE — existing views + new 26-col node contract.
• UI handoff: complete (old Registries column/drill; L1 6-composition + species/DOT/collections + OS-Agency cols; L2 DOT/loài drill; L3 substrate).
• Pin/label/grouping: design-clear; pin_state=PIN_REGISTRY_MISSING; threshold 50; next phase.
• Done enough? YES at contract + apply-ready-graph tier.
• Exact remaining blocker: operator commits the 13-edge wiring (owner accepts count-refresh side-effect); aggregate pivots need engine extension + ratified defs.
• Next macro: REGISTRIES_PIVOT_PARENT_GRAPH_COMMIT_AND_AGGREGATE_PIVOTS.
• Forbidden compliance: full (no cleanup, no dot-pivot-update, no birth-gate, no Nuxt math, no hidden PIVOT_MISSING).
• Report path: knowledge/dev/reports/architecture/registries-pivot-dynamic-layer-graph-count-contract-finalize-2026-06-03/ (docs 00–12).