SUPERTRACK K. BIRTH_GATEWAY_DESIGN_INDEX.md updated to rev17 with the Stage 2.6A-FIX3 banner: rule governance machine-enforced (authority_lock/provenance/checksum/version/approver via fn_qt001_rule_governance_ok + fn_qt001_eval_rule_v3 + repointed fn_qt001_machine_tier->v3); plan fingerprint v3 content-addressed over all control inputs (composite cb7f062ed3becb1d71ff70917ec5b105, 13 sensitivity tests); exact signoff v3 (plan_id/version/fingerprint/scope/tier/reviewer-allowlist/strict-expiry, 15 negative tests); readiness v6 data-driven (no regex/function-existence; qt001_capability_contract); hardcode guard v4 structural (inventory demoted to diagnostic; 11 behavioral detectors); public/directus lockdown structurally blocking with revocation routed to 2.6B; scale blocking via capability contract; end-to-end no-bypass proof (11/11 blocked). Status remains apply BLOCKED. The new live objects are listed in the index under the Stage 2.6A-FIX3 objects line. Codex FIX3 re-audit required before 2.6B.

The index records that FIX3 is PARTIAL (PUBLIC/Directus actual revocation routed to 2.6B but structurally blocking now), supersedes the FIX2 PARTIAL line, and keeps the no-apply / no-permit / re-audit-before-2.6B rule in force.