Cross-platform session historian agent. Searches prior Claude Code and Codex session transcripts for what was tried, what failed, and what was decided in earlier sessions on the same repo. Invoked by other skills (/compound, /xplan, /debug) to surface institutional knowledge a fresh session cannot see.
Installation
1
Add the marketplace
/plugin marketplace add lucasmccomb/ccgm
2
Install plugins
/plugin
Run these commands in Claude Code to add this plugin to your environment. The marketplace must be added before you can install its plugins.