Source Intelligence

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 v2.1.53 Home All releases olderv2.1.52 v2.1.54newer
Claude Code v2.1.53

Updated Write Tool Description

The Write tool description now explicitly recommends the Edit tool for modifications:

  • Old: "ALWAYS prefer editing existing files in the codebase. NEVER write new files unless explicitly required."
  • New: "Prefer the Edit tool for modifying existing files — it only sends the diff. Only use this tool to create new files or for complete rewrites."
Evidence

Updated Write tool instructions (search for "Prefer the Edit tool")

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

See this entry in the whole of v2.1.53 →