Engineering decisions live in people's heads and old PRs. When they leave, it goes with them. New hires and AI tools start from zero every time. Lithium captures those decisions and distributes them to Claude Code, Cursor, and Windsurf via MCP. Add them manually or connect GitHub and they get extracted from merged PRs automatically. Before the AI writes anything, it already knows why your codebase is built the way it is.
Built this after months of watching Claude Code ignore everything my team decided. Wrong patterns, wrong conventions, every session. The decisions existed, just scattered across people's heads and old PRs.
Lithium started as a way to write those decisions down in one place. Then I added MCP so AI tools pull them in automatically. Then GitHub extraction so you don't even have to write them manually.
Free to start. Looking for teams to try it and tell me what's broken. Honest feedback is the most useful thing right now.
Mailwarm
Half the time On GitHub, the actual conventions already exist in the codebase, nobody just writes them down properly.