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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 v2.1.176 Home All releases olderv2.1.175 v2.1.177newer
Claude Code v2.1.176

Grep Tool: Expanded Allowed Flags for rg

The Grep tool's rg allowlist now includes additional flags that were previously missing:

  • --smart-case — case-insensitive if pattern is all-lowercase, case-sensitive otherwise
  • --case-sensitive — always case-sensitive (overrides --ignore-case)
  • --no-line-number — suppress line numbers
  • --multiline — allow patterns to match across newlines
  • --pcre2 — use PCRE2 regex engine
Evidence

Grep allowlist expansion (search for "--smart-case" and "--no-line-number")

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

See this entry in the whole of v2.1.176 →