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Reading a new release v2.1.251 Analysing changes · 2/5 Writing the entries · 2/4 steps 470 findings $18.91 so far

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 v2.1.187

preset:default in allowed-tools

What

Skill frontmatter can now use the token preset:default in its allowed-tools list to include the full default tool set alongside any custom additions.

Usage
---
allowed-tools: preset:default, Bash(make test)
---
Details
  • When preset:default is present, Claude expands it to the full list of default tools and then appends any additional entries in the list
  • This makes it easy to write skills that extend — rather than replace — the default tool set
Evidence

New expansion logic (search for "preset:default")

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

See this entry in the whole of v2.1.187 →