One of the last pieces we locked in before submission was the immudb ledger integration. Every MRS verdict: permitted or rejected, is now sealed in a cryptographically verified ledger entry backed by a Merkle tree. That means any decision the system makes can be independently verified after the fact with a single CLI call.
The design goal was simple: the audit trail has to be as trustworthy as the governance engine itself. Prolog and Z3 give you a deterministic verdict. immudb gives you proof that verdict was never touched after it was written. Those two properties together are what make MirrorOS useful in a real compliance context, not just a demo.
The integration is fully graceful; MirrorOS starts and runs normally if immudb isn't available, which keeps the barrier to entry low for anyone forking the repo. But when it is running, every action leaves a receipt.
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