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Reading a new release v2.1.251 Analysing changes · 2/5 Sorting the findings · 1/4 steps 470 findings $18.91 so far

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 v2.0.54

MCP Endpoint Warning System

What: New warning when MCP endpoint files cannot be found, with automatic fallback to state files.

How it appears:

Warning: MCP endpoint file not found at <path> (session: <id>). Falling back to state file.

Details:

  • Warning displays once per session (uses lV9 flag to prevent spam)
  • Error messages now include session IDs and file paths for easier debugging
  • Evidence: DH() at line 519760, warning message at line 519769

See this entry in the whole of v2.0.54 →