Plugins with unrecognized source types are now stubbed rather than dropped entirely:
- If a marketplace plugin entry uses a source type not supported by the current Claude Code version, it is preserved as an "unsupported" placeholder
- Installation attempts fail with a clear "update Claude Code and try again" message
- This prevents
detectDelistedPluginsfrom incorrectly treating it as removed
Evidence
Plugin stubbing logic — search for "Stubbing unparseable marketplace plugin entry" and "source.source: 'unsupported'"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.