I built a small deterministic policy engine to govern actions proposed by LLMs before they are executed.

The system enforces:

- fail-closed execution - signed out-of-band approval proofs - anti-replay protection - verifiable audit chain

The repository includes a CLI demo showing how irreversible actions are denied, approved, and audited.

Repo: https://github.com/nayfly/aetherya-core

Feedback welcome.