# MPC Staging Hardening Implementation Report — v6.82.190

- Supplied baseline: `6.82.188`
- Previous hardened build: `6.82.189`
- Corrected build: `6.82.190`
- Generated: `2026-07-12T09:32:10+02:00`
- Final Next build ID: `6eGb1v3TAKMkiJZf3IVHp`

## Application/runtime changes

- `server.js`: added controlled HTTP 204 handling for every `/api/*` OPTIONS request.
- The OPTIONS response includes `Allow`, `Vary`, no-store security headers and no response body.
- No `Access-Control-Allow-Origin` header was added; unrestricted cross-origin API access remains disabled.
- `scripts/test-production-contracts.js`: added regression checks for the OPTIONS handler and unrestricted-CORS prevention.
- Release version sources updated to 6.82.190.
- Final route and asset evidence regenerated after the final clean build, eliminating stale Next.js chunk hashes from certification records.

## Verification

- Full source verification: PASS.
- Dependency audit: 0 vulnerabilities.
- Clean Next.js production build: PASS.
- Build verification and cPanel startup doctor: PASS.
- 317 GET routes: PASS.
- 317 HEAD routes: PASS.
- 862 rendered assets/downloads: PASS.
- 13 targeted API/protocol checks: PASS.
- Node runtime log: no errors or exceptions.
- Production source maps: none.

## Dependencies and migrations

- No dependency added or removed.
- No database or content migration required.
- External persistent runtime storage remains required outside the application folder.

## Remaining environment gates

Hosted DNS/TLS verification, CloudLinux/cPanel control-plane health, staging-only credentials, real-device accessibility, provider dashboards, backup/restore drills and post-deployment monitoring must be verified on the target environment. No knowingly unresolved critical application-code defect remains.