First sync and core concepts

rogrep sync
rogrep doctor
rogrep stats projects

The first command discovers and indexes on-disk history. Later commands refresh incrementally.

The data model #

Conversation (rg&): one provider session.
Exchange (rg&#eN): one real user prompt and everything the agent did in response.
Turn: one message, tool call, or tool result.

Use IDs from results with rogrep show.