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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.

All of v1.0.54 Home All releases olderv1.0.53 v1.0.55newer
Claude Code v1.0.54

Command System Enhancements

  • Better error handling for commands: Failed commands now throw proper CommandError exceptions with context
  • Improved command validation: More specific error messages when using unsupported command types
  • New command execution function: Added K1B for executing prompt commands with better error handling

See this entry in the whole of v1.0.54 →