Follow Discord

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

← All of v2.1.221 Home All releases ←olderv2.1.220 v2.1.222newer→

Claude Code v2.1.221 3 Aug 2026

MCP @-mention resource reads go through the shared reader with abort support

You'll notice

Useful3 Signal0

MCP

Cancelling while an @-mentioned MCP resource loads no longer spits out an error.

What

Reading an @-mentioned MCP resource now uses the shared reader helper and respects the session abort signal.

Details

the abort signal is passed with context "MCP @-mention resource read"
an aborted read returns quietly instead of logging an error
server state acceptance now uses the connectivity predicate rather than requiring type === "connected"

Evidence

MCP @-mention resource read

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

See this entry in the whole of v2.1.221 →