A repo with only plugin.json is recognized as a plugin but not as a
marketplace, which is what `/plugin marketplace add` needs. Adding
.claude-plugin/marketplace.json that declares the marketplace
('rasterandstate') and lists fj as its single plugin.
The correct two-step install is now:
/plugin marketplace add rasterandstate/fj-claude-plugin
/plugin install fj@rasterandstate
README.md and claude/README.md updated accordingly.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
