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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 ·

Websocket permission prompts can hide the subprotocol list

Websocket permission prompts can hide the subprotocol list and tell you to deny unless expected.

You'll notice New Features
JSON All of v2.1.251
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
PermissionsArea: what it touches
New FeaturesKind: in v2.1.251,
New FeaturesSection of the release
What

A permission prompt for a websocket tool call can now show a redacted placeholder in place of the actual subprotocol list, telling you it cannot be shown in full and to deny unless you were expecting it.

Details
  • Shown when the request payload marks the protocols as withheld; what sets that mark is decided upstream of the dialog.
Evidence

(cannot be shown in full — deny unless expected)

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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