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

Claude Code v2.1.251 ·

MCP server error messages quote the server name consistently

MCP server error messages now quote and sanitise the server name consistently.

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

Failure messages for reconnecting to an MCP server, or enabling and disabling one, now put the server name in double quotes and pass it through the same sanitizer used elsewhere.

Details
  • Where policy restricts what can be shown, the message still withholds the detail as before.
Evidence

Failed to ${r} MCP server "${Tr(o)}"

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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