Create a new audit session or resume an existing one by title. Call this at the start of every conversation.

Record a single message (user or assistant) with the current local datetime and timezone offset. Call before responding for user messages, and before sending for assistant messages.

Record a user+assistant exchange from historical or batch imports only. Do NOT use for live conversations — both timestamps are captured at the same instant with no real gap. For live sessions always call log_message twice: once for the user message, once for the assistant response.

List all audit sessions ordered by most recently active. Returns id, title, ai_tool, message_count, created_at, updated_at.

Retrieve the full timestamped audit log for a session, oldest first.

Verify the tamper-evident hash chain for a session. Returns valid=true if no rows were edited after logging, or the first broken link if tampering is detected.