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 v2.1.129 Home All releases olderv2.1.128 v2.1.131newer

Better Plugin Authoring Diagnostics

Claude Code now warns plugin authors about several manifest and packaging mistakes that previously could be confusing.

Details
  • Experimental plugin components should be declared under experimental.<component> instead of at the top level.
  • Invalid experimental values are ignored with a clearer warning.
  • claude.md and claude.local.md at a plugin root now produce guidance because they are not loaded as project context.
  • Plugin root context should move into a skill at skills/<name>/SKILL.md.
Evidence

Plugin validation warnings (search for "is an experimental component; declare it under 'experimental.", "'experimental' must be an object containing component declarations", and "To ship context with your plugin, use a skill (skills/<name>/SKILL.md) instead.")

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

See this entry in the whole of v2.1.129 →