Topical Takes

Short, opinionated posts on eBPF, Linux internals, and the tools we all run in production.

AlleBPF7linux6observability4yeet3HTTP2kubernetes2networking2tcpdump2802.111AI agents1ai-sre1Cilium1integration-testing1rf1root-cause-analysis1security1uprobes1websocket1wifi1wireless1wss1

How to Test and Debug WebSocket Traffic on Linux in 2026: Your Integration Test Asserts on the Client, Not the Wire

A WebSocket integration test asserts on what your client library returned, which is not what crossed the connection. How to see the real frames inside wss:// on Linux with wssnoop, Wireshark and a TLS keylog, mitmproxy and Chrome DevTools, and how to turn a captured session into a fixture your test suite can replay.

websocketwssintegration-testinguprobeseBPFlinuxyeet
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