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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 v2.1.234 ·

Server names, URIs and filenames are escaped before going into prompts

MCP server names and resource URIs are escaped before being put into prompts.

You'll notice Bug Fixes
JSON All of v2.1.234
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Bug FixesKind: in v2.1.234,
Bug FixesSection of the release
What

MCP resource content is wrapped in a tag carrying the server name and resource URI, and those values are now run through an escaper for <, >, " and control characters instead of being pasted in raw. The note appended to a truncated file escapes the filename the same way.

Details
  • The truncation note's wording softened from "Don't tell the user about this truncation" to "No need to mention the truncation."
Evidence

No need to mention the truncation.

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

See this entry in the whole of v2.1.234 →

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