Multi-Protocol Client Resilience
Harden long-lived and request-response clients across dual-stack racing, WebSocket reconnects, HTTP/2 drain signals, half-closed TCP, keep-alive reuse, DNS changes, pool pressure, and circuit-breaker transitions. This bundle provides one coherent client lifecycle toolkit across protocols. Use it when each transport works alone but deploys, endpoint rotation, partial failure, or reconnect pressure expose shared ownership bugs.
Works with every agent that reads SKILL.md — Claude Code, Cursor, Codex CLI, Gemini CLI, GitHub Copilot, Windsurf, OpenClaw, and more.
One payment, lifetime access. 8 skills unlock instantly in your library.
What's included
8 skills
Repair Happy Eyeballs races that publish stale winners, leak losing sockets, or misreport dual-stack connection failures.
Repair synchronized reconnect bursts, overlapping WebSockets, duplicate subscriptions, heartbeat leaks, auth races, and unsafe replay.
Repair HTTP/2 GOAWAY drain bugs, stale pool reuse, unsafe stream retries, one-shot body replay, unknown outcomes, and replacement-connection herds.
Repair TCP half-close bugs that truncate responses, destroy both directions on EOF, omit FIN propagation, or leave writers hanging.
Repair HTTP keep-alive lifecycle bugs that leak sockets, exhaust pools, or cause intermittent resets after idle periods and deploys.
Repair ignored DNS TTLs, startup-only resolution, stale endpoint reuse, retry-to-same-address loops, discovery refresh stampedes, and DNS/pool confusion.
Repair leaked or long-held connections, per-request client pools, fan-out saturation, retry amplification, and cleanup gaps without guessing pool sizes.
Repair circuit-breaker state races across closed, open, and half-open transitions without changing resilience policy.
See it in action
Repair Happy Eyeballs Race Bugs
Example session with this skill installed
Our Go HTTP client uses a custom Happy Eyeballs dialer. IPv6 starts first and IPv4 starts after the configured delay. When both connects complete at the same barrier, both goroutines can send a socket to the result channel; the second socket leaks, and during cancellation the cleanup path occasionally closes the actual winner. Repair with a fake resolver, fake conns, barriers, and a fake clock. Preserve address order, delay, timeout, TLS, pool, and retry settings; do not dial the network.
- Read your context and instructions
- Compiled the repair happy eyeballs
Dual-stack race found. IPv6 and IPv4 can both complete before the shared promise is marked, and the late callback can replace the selected socket while leaving the other open. The repair makes winner election generation-aware and atomic, closes every loser exactly once, preserves attempt errors, and validates simultaneous success, cancellation, timeout, and all-failure paths with fake sockets.
How to use
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