In D15094#416306, @tomek wrote:

This is a step backward - in the past, MemberInfoWithPermissions was the type used here, but we migrated from that. After the mgrations, only MemberInfoSansPermissions correctly describes the types.

It looks like the migration might not have been complete, after changing thinRawThreadInfoValidator from this:

const thinRawThreadInfoValidator: TInterface<ThinRawThreadInfo> =
 tShape<ThinRawThreadInfo>({
…
  members: t.union([
   t.list(memberInfoWithPermissionsValidator),
   t.list(memberInfoSansPermissionsValidator),
  ]),
 });

to this:

const thinRawThreadInfoValidator: TInterface<ThinRawThreadInfo> =
 tShape<ThinRawThreadInfo>({
…
  members: t.list(memberInfoSansPermissionsValidator),
 });

the test here fails, because minimallyEncodeRawThreadInfoWithMemberPermissions returns thread info with members with permissions. And minimallyEncodeRawThreadInfoWithMemberPermissions is used in a few places, in particular here. So for now I'm just modifying types and I've created a follow up task to figure out how to solve this: https://linear.app/comm/issue/ENG-11054/fix-thinrawthreadinfo-type