I built an MCP server that solves this. It gives Claude access to all your past Claude Code sessions.
UI also enables Claude powered AI summarization of past conversations for more concise insights.
Now I can ask: "What authentication approach did I use in that API project?" and Claude searches my session history directly.
5 MCP tools: list_sessions, search_sessions, get_session, get_session_content, search_content.
Also has a desktop UI (Electron + React) to browse sessions visually.
Built with Go + SQLite. Open source (AGPL-3.0). Tested on Mac and Linux.
GitHub: https://github.com/tad-hq/universal-session-viewer
Looking for feedback from other Claude Code users.
Still a WIP, I have been using it daily in my workflows. Contributions much appreciated.