Design skill for OpenPencil — op CLI, batch DSL, MCP tools, PenNode schema, and UI design best practices
$claude plugin marketplace add zseven-w/openpencil-skillInstalls into the current project.
Install openpencil-skill by running `claude plugin marketplace add zseven-w/openpencil-skill`, then use it for the current task and follow its documentation at https://github.com/zseven-w/openpencil-skill.