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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 v2.0.72 17 Dec 2025

Invoked Skills Context

What

Skills invoked during a session are now tracked and can be included in system context.

Details

Tracks skill name, path, content, and invocation time
New invoked_skills message type for system context
Skills sorted by most recent invocation

Evidence

N65() at line 377668 (contains "invoked_skills", BS0() for skill tracking), QS0() at line 2443 (skill registration)

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

See this entry in the whole of v2.0.72 →