We released what I've been working in the last few months: an Openclaw plugin that ecords every session, tool invocation, and prompt exchange into a local SQLite database with SHA-256 hash chain integrity, so you can verify that no events were altered or deleted after the fact.
An audit log for AI coding is clever. I think the ability to encrypt-and-ship the logs (backups) on an interval will be really useful for organizations seeking something like SOC2 or ISO27001.