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 v2.1.239 Home All releases olderv2.1.238 v2.1.240newer
Claude Code v2.1.239

Markdown files saved with a byte-order mark now have their frontmatter read

You'll notice
Useful4 Signal2
Frontmatter

Agents, commands, skills and CLAUDE.md files saved with a byte-order mark now have their frontmatter read.

What

Agent, command, skill and CLAUDE.md-style files saved with a UTF-8 byte-order mark had their YAML frontmatter treated as ordinary body text. All three frontmatter parsers now strip the mark first.

Details
  • Covers the generic parser, the multi-file loader that reports "Could not read", and the agent/skill parser that special-cases a leading ---.
Evidence

e.charCodeAt(0) === 65279 ? e.slice(1) : e

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

See this entry in the whole of v2.1.239 →