Claude Code marketplace distributing the c4m plugin — interactive C4 architecture diagramming (Simon Brown's model).
$claude plugin marketplace add cheriftj/c4-model-skillInstalls into the current project.
Install c4-model-skill by running `claude plugin marketplace add cheriftj/c4-model-skill`, then use it for the current task and follow its documentation at https://github.com/cheriftj/c4-model-skill.