12 GPT MCP-Readable Checkpoint

status: STAGE2_6A_MACHINE_ENFORCED_PLAN_TIER_SIGNOFF_LAYER_READY_FOR_INDEPENDENT_REAUDIT prior_status: STAGE2_6A_FAIL_HARDCODE_STILL_DANGEROUS verdict: PASS (Stage 2.6A-FIX). Do NOT proceed 2.6B, open permits, or apply until a fresh independent Codex re-audit passes.

live_mutation: YES, additive + reversible + birth-neutral. No apply. No permit. No trigger/gateway-body/writer-execute change.

machine_tiers: TIER1=0 TIER2=7 TIER3=6 (rule-derived; the 5 ex-TIER1 collections demoted to TIER2 — no plan-bound signoff). guards: tier_rule_no_go_guard.pass=true; blocked_reason_not_literal_guard.pass=true (7 distinct/0 empty); parity_conservation_guard.pass=true (parity SIGNAL_ONLY, parity_formula_still_open=true); hardcode_guard_v2.status=FAIL (HC-05 dangerous authority open); plan_bound_signoff_status.plan_bound_safe=false (active_not_safe=1); readiness_v4 overall_ready=false (ssot 3/4, apply 0/6); writer_bypass_must_block_guard.pass=true; must_not_proceed.pass=true.

anchors: birth=1,210,956 (pre-KB); qt001_origin=0; open_permits=0; done_ledgers=0; tga=129; apr=42; gateway_md5=c022f849 present; stage0=5/5; gateway_integrity all_ok=true.

objects: tables qt001_tier_rule_registry(11), qt001_signoff_plan_binding(0); fns fn_qt001_eval_tier_predicate, fn_qt001_collection_signals, fn_qt001_machine_tier, fn_qt001_machine_blocked_reason; rewritten fn_qt001_refresh_plan_snapshot (IN-list removed), fn_qt001_build_plan_registry (CASE+literal removed); 23 new v_qt001_* views.

sql_dir: /opt/incomex/docs/mcp-writes/birth-stage2-6a-fix-2026-06-06/ (01_engine,02_rules_and_fns,03_views,04_readiness_v4_and_a_i,05_regen_and_inventory,91_verify,99_rollback).

next_macro: BIRTH_STAGE2_6B_QT001_PERMIT_RUN_KEYSET_RESUME. blocker: independent re-audit + next layers + owner permit; zero engineering blocker.