# Initial Registries
Status: Draft • Last-Updated: 2025-09-11T22:47:56.408268Z

## Suite IDs
- W4-BASE-1 : X25519 / Ed25519 / ChaCha20-Poly1305 / SHA-256 (COSE)
- W4-FIPS-1 : P-256 ECDH / ECDSA-P256 / AES-128-GCM / SHA-256 (JOSE)

## Extension IDs (provisional)
- w4_ext_sdjwt_vp@1
- w4_ext_noise_xx@1
- w4_ext_93f07f2a@0 (GREASE placeholder)

## Error Codes
- W4_ERR_UNSUPPORTED_SUITE
- W4_ERR_DOWNGRADE_DETECTED
- W4_ERR_AUTHZ_DENIED
- W4_ERR_REPLAY
- W4_ERR_BAD_TIMESTAMP
- W4_ERR_GRANT_EXPIRED
- W4_ERR_RATE_LIMIT
- W4_ERR_SCOPE_DENIED
- W4_ERR_BAD_SEQUENCE
- W4_ERR_WITNESS_REQUIRED
- W4_ERR_FORMAT
