Yeah, it has been frustrating me lately that there isn't a simple drop-in Passkeys-only library/framework yet. Right now the best advice is "use Auth0/Okta or competitor and configure them in Passkey-only" which adds a vendor where you shouldn't need a vendor.

The other day I just wanted to store passkeys in Deno KV without feeling like I was rolling my own crypto library. I did not succeed in the limited amount of free time I had on that personal project, and that seemed a shame and a half.