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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 v2.0.34

Passive LSP Diagnostics Collection

What: Automatic collection of diagnostics (errors, warnings, hints) from LSP servers and delivery as message attachments.

Details:

  • LSP servers now send textDocument/publishDiagnostics notifications automatically
  • Diagnostics are queued and attached to the next API request as lsp_diagnostics attachments
  • Includes file URI, line ranges, severity levels (Error/Warning/Info/Hint), and diagnostic messages
  • Handles multiple LSP servers with individual error tracking and retry logic
  • New saveFile method added to LSP manager for textDocument/didSave notifications
  • Evidence: Handler registration lUQ() at line 276542, diagnostic registration dUQ() at line 276467, severity mapper WR6() at line 276504, transformer FR6() at line 276518 in pretty-v2.0.34.js

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.0.34 →