I maintain Chron, an MCP server that writes an audit log of AI coding sessions to a local SQLite database. Every message gets a timestamp, and every session records which tool produced it: Claude, Cursor, Codex.
A while back I opened the history and found Claude messages and Cursor messages interleaved inside a single session. Two different tools, two different terminals, one session record.
For a tool whose entire job is attribution, that is about as bad as a bug gets.
The setup
The sessions table looked like this:
