> The key encoding also deviates from prior practice with other algorithms and entirely forgoes ASN.1 encapsulation of the key, that can be used to encode more than one key representation.

Good - ASN.1 encapsulation and the stupid mishmash of formats is awful.

Having one canonical representation of the key derived from the seed alone sounds like a great idea?

The post's full title is "OpenSSL Position and Plans on Private Key Formats for the ML-KEM and ML-DSA Post-quantum (PQ) Algorithms", which was too long for HN. I chose "OpenSSL Position and Plans on Private Key Formats for Post-Quantum Algorithms" as the title for the submission.