We are using pure implicit flow (id_token only) to request non-standard claims with standard and non-standard scope values.

EDIT scopes won't work for us as we need to be able to specify various attributes/value for each requested claim.

per https://openid.net/specs/openid-connect-core-1_0.html#Claims

we should be able to specify something like this in the authorization query params

{
"id_token":
{
"field_x": {
"essential": true,
"value" : "y",
"condition" : "z", // non-standard
},
}

If this isn't supported, are there plans to do so? or should I assume I need to manually append these claims to the authorization_url?

thanks!