Complete procedures with a way back.

Build a governed RAG knowledge lifecycle for document updates and deletion, immutable lineage, tenant ACLs, PII minimization before embeddings, retention and legal hold, multi-index consistency, deletion verification, encrypted backup, isolated restore, derived-index rebuild, and rollback that never resurrects prohibited data.

Create one concise canonical project policy, accurate adapters and path scopes for Codex, Claude Code, Gemini CLI and GitHub Copilot, then secure, test, version and roll back the resolved bundle.