Production Deployment Checklist Production Deployment Checklist Before Launch ●       Secrets in vault ●       Rate limiting ●       Retry logic ●       Queueing ●       Structured logs ●       Health checks ●       DB pooling ●       CI/CD ●       Rollback strategy ●       Human approval console ●       Policy engine live ●       Audit logs enabled ●       Monitoring dashboards ●       Incident runbooks ●       MCP servers pinned to a known-good tool-definition hash, with re-approval required on change (New) ●       OAuth issuer validation enabled on every MCP client (New)   Build Strategy Build in This Order ●       Single agent + retrieval ●       Add memory (start with Pattern B — retrieval-augmented) ●       Add tools via MCP ●       Add policy engine ●       Add verifier ●       Add human approvals ●       Add multi-agent roles ●       Optimize cost routing ●       Formalize the harness — write down the planner/executor/verifier contracts and context-assembly rules as a versioned spec, not implicit code structure (New) ●       Add simulations/evals, including harness-vs-model attribution (New) ●       Expand autonomy slowly