Skill UI

This skill guides the implementation of digital signatures using Ed25519, a high-performance cryptographic algorithm based on the Edwards curve. It provides 128-bit security with small keys and signatures, offering significant advantages over RSA and ECDSA, including deterministic signing and side-channel resistance. Learn to generate key pairs, sign documents and code, and verify signatures for robust security controls.

A governance skill designed to secure AI agent tool calls using advanced authorization policies. It implements Cedar policies to control which tools agents can access and under what conditions. Key features include running in 'Shadow mode' for safe observation, 'Enforce mode' for strict blocking, and generating cryptographically signed Ed25519 receipts to provide an immutable, tamper-evident audit trail for every policy decision.