Add the marketplace
/plugin marketplace add thlandgraf/cc-marketplaceInstall plugins
/pluginRun these commands in Claude Code to add this plugin to your environment. The marketplace must be added before you can install its plugins.
Claude Code helper for SPECLAN - manage project specifications as interlinked markdown files
Manage project constitution files - rules, best practices, patterns, and guardrails for LLM/coding agents
Filesystem-based task management with git integration - track tasks through open/wip/done lifecycle