Checkpoint — Backlog Remediation & Gate Stage-2 (MCP-readable short proof)

Date: 2026-06-03 Macro: BIRTH_ORPHAN_BACKLOG_REMEDIATION_GATE_STAGE2_AND_RP_RETURN_READINESS Final status: PARTIAL Execution mode: EXECUTION_MODE (root ssh → docker postgres → psql workflow_admin, superuser, read-write)

(Mirror of the canonical checkpoint at knowledge/dev/reports/architecture/checkpoint-backlog-remediation-stage2-2026-06-03.md.)

1. What changed live (production directus)

One lawful, reversible remediation was applied: 22 pivot_definitions rows were born through the proven birth mapping (species=catalog, composition=atom, role=governed), tagged dot_origin = BACKFILL:birth-orphan-remediation-2026-06-03. No business content was mutated, no rows deleted or hidden, no guard exception added.

2. Before / after BLOCK counts (live preflight guard)

• birth_orphan_critical_active: 80 → 59
• birth_phantom_real: 6 → 6
• fs_dot_file_no_registry: 16 → 16
• dot_pivot_update_not_governed: 1 → 1
• governance_owner_gap: 210 (warn) · governance_gate_ospa: 0 (closed) Guard fn_assert_safe_for_dot_action() still RAISES on the 4 BLOCK dimensions.

3. dot_iu_command_catalog (54) — BLOCKED_WITH_EXACT_REASON

Triple-absent; no fitting species, no canonical code, role undecided; registrar creds absent.

4. pivot_definitions — 22 born; 5 collision-blocked

PIV-101/103/104/105/106 codes already used by pivot_results; birth_registry UNIQUE on entity_code alone. Fix = composite unique + trigger change (owner/design).

5. 6 REAL_MISSING phantoms — classified, not mutated

COL-171/172/173, SPE-NRC/NRM/NRR. No lawful retirement mechanism exists. Owner retire/restore decision.

6. 16 FILE_NO_REGISTRY — all classified; registrar-creds-gated; none executed/quarantined.

7. dot-pivot-update — STAGED_FILE_ONLY / UNBORN / NOT_VALID_DOT; kept blocked.

8. Stage-2 birth gate — NO ACTIVATION (no family clean).

9. RP cleanup decision — NO-GO (fail-closed guard; not bypassed).

12. GPT SSOT statement

GPT may use this checkpoint as SSOT for the next macro. RP cleanup remains NO-GO.