diff --git a/lib/permissions/minimally-encoded-thread-permissions-validators.js b/lib/permissions/minimally-encoded-thread-permissions-validators.js
--- a/lib/permissions/minimally-encoded-thread-permissions-validators.js
+++ b/lib/permissions/minimally-encoded-thread-permissions-validators.js
@@ -8,7 +8,7 @@
 } from './minimally-encoded-thread-permissions.js';
 import { clientAvatarValidator } from '../types/avatar-types.js';
 import type {
-  MinimallyEncodedMemberInfo,
+  MemberInfo,
   RawThreadInfo,
   RelativeMemberInfo,
   MinimallyEncodedThreadCurrentUserInfo,
@@ -40,16 +40,15 @@
     permissions: tHexEncodedPermissionsBitmask,
   });
 
-const minimallyEncodedMemberInfoValidator: TInterface<MinimallyEncodedMemberInfo> =
-  tShape<MinimallyEncodedMemberInfo>({
-    ...legacyMemberInfoValidator.meta.props,
-    minimallyEncoded: tBool(true),
-    permissions: tHexEncodedPermissionsBitmask,
-  });
+const MemberInfoValidator: TInterface<MemberInfo> = tShape<MemberInfo>({
+  ...legacyMemberInfoValidator.meta.props,
+  minimallyEncoded: tBool(true),
+  permissions: tHexEncodedPermissionsBitmask,
+});
 
 const minimallyEncodedRelativeMemberInfoValidator: TInterface<RelativeMemberInfo> =
   tShape<RelativeMemberInfo>({
-    ...minimallyEncodedMemberInfoValidator.meta.props,
+    ...MemberInfoValidator.meta.props,
     username: t.maybe(t.String),
     isViewer: t.Boolean,
   });
@@ -80,7 +79,7 @@
   tShape<RawThreadInfo>({
     ...legacyRawThreadInfoValidator.meta.props,
     minimallyEncoded: tBool(true),
-    members: t.list(minimallyEncodedMemberInfoValidator),
+    members: t.list(MemberInfoValidator),
     roles: t.dict(tID, minimallyEncodedRoleInfoValidator),
     currentUser: minimallyEncodedThreadCurrentUserInfoValidator,
   });
@@ -95,7 +94,7 @@
 export {
   minimallyEncodedRoleInfoValidator,
   minimallyEncodedThreadCurrentUserInfoValidator,
-  minimallyEncodedMemberInfoValidator,
+  MemberInfoValidator,
   minimallyEncodedRelativeMemberInfoValidator,
   minimallyEncodedThreadInfoValidator,
   minimallyEncodedRawThreadInfoValidator,
diff --git a/lib/permissions/minimally-encoded-thread-permissions.test.js b/lib/permissions/minimally-encoded-thread-permissions.test.js
--- a/lib/permissions/minimally-encoded-thread-permissions.test.js
+++ b/lib/permissions/minimally-encoded-thread-permissions.test.js
@@ -6,7 +6,7 @@
   expectedDecodedExampleRawThreadInfoA,
 } from './minimally-encoded-thread-permissions-test-data.js';
 import {
-  minimallyEncodedMemberInfoValidator,
+  MemberInfoValidator,
   minimallyEncodedRawThreadInfoValidator,
   minimallyEncodedRoleInfoValidator,
   minimallyEncodedThreadCurrentUserInfoValidator,
@@ -446,7 +446,7 @@
 describe('minimallyEncodedMemberInfoValidator', () => {
   it('should validate correctly formed MinimallyEncodedMemberInfo', () => {
     expect(
-      minimallyEncodedMemberInfoValidator.is({
+      MemberInfoValidator.is({
         minimallyEncoded: true,
         id: 'memberID',
         permissions: 'ABCDEF',
@@ -455,7 +455,7 @@
     ).toBe(true);
 
     expect(
-      minimallyEncodedMemberInfoValidator.is({
+      MemberInfoValidator.is({
         minimallyEncoded: true,
         id: 'memberID',
         permissions: '01b',
@@ -466,7 +466,7 @@
 
   it('should NOT validate malformed MinimallyEncodedMemberInfo', () => {
     expect(
-      minimallyEncodedMemberInfoValidator.is({
+      MemberInfoValidator.is({
         minimallyEncoded: true,
         id: 'memberID',
         permissions: 'INVALID',
@@ -475,7 +475,7 @@
     ).toBe(false);
 
     expect(
-      minimallyEncodedMemberInfoValidator.is({
+      MemberInfoValidator.is({
         minimallyEncoded: true,
         id: 'memberID',
         permissions: 100,
diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -58,12 +58,12 @@
   type ComposableMessageInfo,
 } from '../types/message-types.js';
 import type {
-  RelativeMemberInfo,
   RawThreadInfo,
+  RelativeMemberInfo,
+  MemberInfo,
   MinimallyEncodedThreadCurrentUserInfo,
   RoleInfo,
   ThreadInfo,
-  MinimallyEncodedMemberInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
 import {
   decodeMinimallyEncodedRoleInfo,
@@ -220,7 +220,7 @@
 }
 
 function threadActualMembers(
-  memberInfos: $ReadOnlyArray<MinimallyEncodedMemberInfo | RelativeMemberInfo>,
+  memberInfos: $ReadOnlyArray<MemberInfo | RelativeMemberInfo>,
 ): $ReadOnlyArray<string> {
   return memberInfos
     .filter(memberInfo => memberInfo.role)
@@ -228,7 +228,7 @@
 }
 
 function threadOtherMembers<
-  T: LegacyMemberInfo | MinimallyEncodedMemberInfo | RelativeMemberInfo,
+  T: LegacyMemberInfo | MemberInfo | RelativeMemberInfo,
 >(memberInfos: $ReadOnlyArray<T>, viewerID: ?string): $ReadOnlyArray<T> {
   return memberInfos.filter(
     memberInfo => memberInfo.role && memberInfo.id !== viewerID,
@@ -1033,7 +1033,7 @@
   memberInfo:
     | RelativeMemberInfo
     | LegacyMemberInfo
-    | MinimallyEncodedMemberInfo
+    | MemberInfo
     | ServerMemberInfo,
 ): boolean {
   if (memberInfo.minimallyEncoded) {
diff --git a/lib/types/minimally-encoded-thread-permissions-types.js b/lib/types/minimally-encoded-thread-permissions-types.js
--- a/lib/types/minimally-encoded-thread-permissions-types.js
+++ b/lib/types/minimally-encoded-thread-permissions-types.js
@@ -81,7 +81,7 @@
   };
 };
 
-export type MinimallyEncodedMemberInfo = $ReadOnly<{
+export type MemberInfo = $ReadOnly<{
   ...LegacyMemberInfo,
   +minimallyEncoded: true,
   +permissions: string,
@@ -89,7 +89,7 @@
 
 const minimallyEncodeMemberInfo = (
   memberInfo: LegacyMemberInfo,
-): MinimallyEncodedMemberInfo => {
+): MemberInfo => {
   invariant(
     !('minimallyEncoded' in memberInfo),
     'memberInfo is already minimally encoded.',
@@ -102,7 +102,7 @@
 };
 
 const decodeMinimallyEncodedMemberInfo = (
-  minimallyEncodedMemberInfo: MinimallyEncodedMemberInfo,
+  minimallyEncodedMemberInfo: MemberInfo,
 ): LegacyMemberInfo => {
   const { minimallyEncoded, ...rest } = minimallyEncodedMemberInfo;
   return {
@@ -114,7 +114,7 @@
 };
 
 export type RelativeMemberInfo = $ReadOnly<{
-  ...MinimallyEncodedMemberInfo,
+  ...MemberInfo,
   +username: ?string,
   +isViewer: boolean,
 }>;
@@ -122,7 +122,7 @@
 export type RawThreadInfo = $ReadOnly<{
   ...LegacyRawThreadInfo,
   +minimallyEncoded: true,
-  +members: $ReadOnlyArray<MinimallyEncodedMemberInfo>,
+  +members: $ReadOnlyArray<MemberInfo>,
   +roles: { +[id: string]: RoleInfo },
   +currentUser: MinimallyEncodedThreadCurrentUserInfo,
 }>;
diff --git a/lib/utils/thread-ops-utils.js b/lib/utils/thread-ops-utils.js
--- a/lib/utils/thread-ops-utils.js
+++ b/lib/utils/thread-ops-utils.js
@@ -3,12 +3,12 @@
 import invariant from 'invariant';
 
 import {
-  minimallyEncodedMemberInfoValidator,
+  MemberInfoValidator,
   minimallyEncodedRoleInfoValidator,
   minimallyEncodedThreadCurrentUserInfoValidator,
 } from '../permissions/minimally-encoded-thread-permissions-validators.js';
 import type {
-  MinimallyEncodedMemberInfo,
+  MemberInfo,
   RawThreadInfo,
   RoleInfo,
 } from '../types/minimally-encoded-thread-permissions-types.js';
@@ -46,17 +46,18 @@
 ): RawThreadInfo {
   // 1. Validate and potentially minimally encode `rawMembers`.
   const rawMembers = JSON.parse(clientDBThreadInfo.members);
-  const minimallyEncodedMembers: $ReadOnlyArray<MinimallyEncodedMemberInfo> =
-    rawMembers.map(rawMember => {
+  const minimallyEncodedMembers: $ReadOnlyArray<MemberInfo> = rawMembers.map(
+    rawMember => {
       invariant(
-        minimallyEncodedMemberInfoValidator.is(rawMember) ||
+        MemberInfoValidator.is(rawMember) ||
           legacyMemberInfoValidator.is(rawMember),
         'rawMember must be valid [MinimallyEncoded/Legacy]MemberInfo',
       );
       return rawMember.minimallyEncoded
         ? rawMember
         : minimallyEncodeMemberInfo(rawMember);
-    });
+    },
+  );
 
   // 2. Validate and potentially minimally encode `rawRoles`.
   const rawRoles = JSON.parse(clientDBThreadInfo.roles);