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
experimentalvalues are ignored with a clearer warning. claude.mdandclaude.local.mdat 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.