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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 v2.1.219

Skill listing tracks a modified timestamp from frontmatter

Use it now
Useful3 Signal0
Skills Notable

You can add a modified date in skill frontmatter to influence which skills get pinned.

modified
What

Skill and memory file listings read an explicit modification time from frontmatter, which feeds the recency ordering used when picking pinned candidates.

Details
  • A modified frontmatter field is parsed into modifiedMs.
  • When the field is missing or unparseable, the file mtime is used instead.
Evidence

modifiedMs

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

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