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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 v2.1.124

update-config skill prompt rewritten

The bundled update-config skill (the one Claude uses to edit settings.json) was rewritten with explicit guidance on:

  • When hooks are required vs preferences (PreToolUse, PostToolUse, PreCompact, PostCompact, Stop, Notification, SessionStart).
  • "CRITICAL: Read Before Write" — always read the existing settings file before editing.
  • Using AskUserQuestion to disambiguate user/project/local scope.
  • Right-vs-wrong array merging examples for permissions.allow and hook arrays.
  • Troubleshooting hook execution (debug flags, matcher checking, etc.).
Evidence

Skill prompt (search for "# Update Config Skill" and "## CRITICAL: Read Before Write").

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

See this entry in the whole of v2.1.124 →