Yusei Ito's public collection of Claude Code plugins, distributed as a plugin marketplace. Each plugin bundles a single skill; they are managed and released together from this one repository.
/plugin marketplace add YuseiIto/cc-plugins
/plugin install <name>@cc-plugins
For example, /plugin install ultraresearch@cc-plugins.
To try it from a local clone:
/plugin marketplace add /path/to/cc-plugins
| Plugin | Description |
|---|---|
| ultraresearch | Rigorous multi-source research harness with scope interview, source triage, and red-team falsification. |
| ja-proofread | Japanese-language proofreading combining textlint checks with semantic review and AI-smell detection. (Japanese-oriented) |
| planning-poker | Estimate tasks via agent-team planning poker: question, blind vote, discussion, and re-vote. |
Note: some skills' instructions are written in Japanese.
ja-proofreadin particular targets Japanese-language use.
- Create
plugins/<name>/with.claude-plugin/plugin.jsonand the components (skills/, etc.). - Add an entry to
plugins[]in.claude-plugin/marketplace.json. - Validate with
claude plugin validate . --strict.
See CLAUDE.md for the full structure and conventions.
MIT License. See LICENSE.