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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.

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Claude Code v2.1.219 24 Jul 2026

MCP reconnect failure text is sanitized and length-capped

You'll notice

Useful2 Signal0

MCP

MCP reconnect errors now show cleaned-up, shortened text instead of raw messy error output.

/mcp

What

The two /mcp reconnect failure messages no longer interpolate a raw error string.

Details

Covers "Tried reconnecting to …, but the connection failed:" and "Got new credentials, but reconnecting to …", both assembled at runtime.
The extracted error now passes through the shared display sanitizer, which NFKC-normalizes, strips angle brackets, quotes and assorted bracket characters, collapses whitespace, and truncates with an ellipsis at 200 characters.

Evidence

Reconnection failed after authentication

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

See this entry in the whole of v2.1.219 →