Rolling Deploy & Failover Survival
Prepare applications to survive rolling deploys, endpoint replacement, failover, cold caches, connection churn, synchronized reconnects, dependency degradation, and process shutdown. This bundle repairs DNS staleness, keep-alive sockets, connection pools, WebSocket reconnect storms, cache stampedes, circuit-breaker recovery, timeout budgets, and shutdown data loss. Use it when deployments or failovers expose lifecycle defects that ordinary steady-state tests never reveal.
Works with every agent that reads SKILL.md — Claude Code, Cursor, Codex CLI, Gemini CLI, GitHub Copilot, Windsurf, OpenClaw, and more.
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What's included
8 skillsRepair ignored DNS TTLs, startup-only resolution, stale endpoint reuse, retry-to-same-address loops, discovery refresh stampedes, and DNS/pool confusion.
Repair HTTP keep-alive lifecycle bugs that leak sockets, exhaust pools, or cause intermittent resets after idle periods and deploys.
Repair leaked or long-held connections, per-request client pools, fan-out saturation, retry amplification, and cleanup gaps without guessing pool sizes.
Repair synchronized reconnect bursts, overlapping WebSockets, duplicate subscriptions, heartbeat leaks, auth races, and unsafe replay.
Stop cache stampedes by repairing fill ownership, request coalescing, lock safety, refresh failures, TTL synchronization, and cold-cache overload.
Repair duplicate breaker ownership, state drift, half-open probe storms, retry amplification, reset races, and failure-classification mismatches.
Align end-to-end request deadlines, retries, cancellation, database work, and side-effect ownership so server work stops when its budget is gone.
Repair apps that lose jobs, events, or writes when containers restart, deployments roll, or processes receive termination signals.
See it in action
You say
Our Go service calls an internal API by hostname. We added a custom DNS cache six months ago; it resolves once and keeps the IP until process restart. After blue/green deploys the old backend is removed, but long-lived processes continue dialing the retired IP and fail until restarted. The HTTP transport also keeps idle connections, so we need to distinguish DNS staleness from pooled connections. Repair locally with a fake resolver and two local HTTP endpoints. Use the DNS TTL supplied by the test fixture; do not query production DNS, change real TTLs, disable caching, or blindly retry POST requests.
Your agent does
DNS cache staleness found. The application resolves once and retains the address until restart, while HTTP connection reuse is a separate lifecycle. The repair honors the supplied TTL, coalesces refresh, rotates address generations, separates DNS from pooling, and adds deterministic A-to-B endpoint tests. Production DNS and resolver behavior remain unverified.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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