K01-GN: No
Rationale
The selected v0.20.x CADET documentation explicitly specifies Curve25519 ECDHE for endpoint key exchange, with AES-256/Twofish payload encryption. Symmetric cipher strength and forward secrecy do not convert that classical exchange into a PQ KEM.
Assessment method
Specification/source/dependency analysis; no new runtime execution
Source context
Primary documentation and explicitly selected composition; documentary review 2026-10-15