Reading a new releasev2.1.251Analysing changes · 2/5Writing the entries · 2/4 steps470 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.
Skills now support a user-invocable frontmatter field. When set to false, the skill is hidden from user-facing command lists but can still be invoked by the model.
Evidence
BX9() at line 502839 (skill builder, contains "userInvocable", "user-invocable")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
