Comment by apetresc
2 days ago
I vaguely remember an old MSC or TWIM or something that described (the possibility of) a new authentication mechanism whereby I could set up either a dummy homeserver or something in .well_known that would allow me to use my own domain but without needing to use my own homeserver for the actual traffic. Sort of like an auth-only homeserver, if you will.
Is that part of MAS? Was that initiative ever fully-baked? Or am I just misremembering?
That's .well-known based delegation, which was proposed in MSC1708 in Nov 2017: https://github.com/matrix-org/matrix-spec-proposals/blob/old... and merged into the spec in Jan 2019 (prior to Matrix 1.0 in June 2019): https://github.com/matrix-org/matrix-spec/commit/0347e873efc...
So yes, fully-baked and part of Matrix since 1.0!
Next Gen Auth via OIDC is instead a key part of the (upcoming) Matrix 2.0 spec release - see https://areweoidcyet.com and https://github.com/matrix-org/matrix-spec-proposals/pull/386...
Afaik that's not related to this, that was already possible as a domain alias. I think that feature is called a delegation if I remember correctly.