Implements ECDH key wrapping via HKDF-SHA256 + ChaCha20Poly1305, bech32 encode/decode for age1... recipients and AGE-SECRET-KEY-1... identities. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implements ECDH key wrapping via HKDF-SHA256 + ChaCha20Poly1305, bech32 encode/decode for age1... recipients and AGE-SECRET-KEY-1... identities. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>