riotpiao.com/tasks/4.6-namespace-validation.md

4.6 — Namespace/resource-name validation by fixture membership (GREEN)

Phase: 4 — Terminal (Surface C) Stage: GREEN

• Namespace and resource-name arguments validated by set membership against the mock fixture (lib/clusterMock.ts), not regex/escaping

Done — implemented in app/api/exec/route.ts (namespaces.find(...)). Real backend must validate against a live snapshot, not a static fixture — see REQUIREMENTS.md.