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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Agent proxy tests egress with a real WebSocket handshake

The agent proxy detects blocked outbound traffic more reliably using a real WebSocket test.

Under the hood Improvements
JSON All of v2.1.251
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Agent ProxyArea: what it touches
ImprovementsKind: in v2.1.251,
ImprovementsSection of the release
What

The proxy's egress check now stands up a loopback server, performs an actual WebSocket upgrade and pushes data through it, watching whether the send buffer backs up, which detects outbound traffic being blocked more reliably than a plain connection attempt.

Details
  • the handshake gives up after a timeout and reports that instead of hanging
  • runs as part of proxy startup and diagnostics
Evidence

handshake timeout

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.251 →

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