diff --git a/keyserver/src/shared/state-sync/current-user-state-sync-spec.js b/keyserver/src/shared/state-sync/current-user-state-sync-spec.js
--- a/keyserver/src/shared/state-sync/current-user-state-sync-spec.js
+++ b/keyserver/src/shared/state-sync/current-user-state-sync-spec.js
@@ -11,6 +11,7 @@
   CurrentUserInfo,
   CurrentUserInfo,
   CurrentUserInfo,
+  void,
 > = Object.freeze({
   fetch(viewer: Viewer) {
     return fetchCurrentUserInfo(viewer);
diff --git a/keyserver/src/shared/state-sync/entries-state-sync-spec.js b/keyserver/src/shared/state-sync/entries-state-sync-spec.js
--- a/keyserver/src/shared/state-sync/entries-state-sync-spec.js
+++ b/keyserver/src/shared/state-sync/entries-state-sync-spec.js
@@ -7,6 +7,7 @@
   RawEntryInfo,
   RawEntryInfos,
 } from 'lib/types/entry-types.js';
+import type { ClientEntryInconsistencyReportCreationRequest } from 'lib/types/report-types.js';
 
 import type { ServerStateSyncSpec } from './state-sync-spec.js';
 import {
@@ -19,6 +20,7 @@
   RawEntryInfos,
   $ReadOnlyArray<RawEntryInfo>,
   RawEntryInfo,
+  $ReadOnlyArray<ClientEntryInconsistencyReportCreationRequest>,
 > = Object.freeze({
   async fetch(viewer: Viewer, ids?: $ReadOnlySet<string>) {
     if (ids) {
diff --git a/keyserver/src/shared/state-sync/state-sync-spec.js b/keyserver/src/shared/state-sync/state-sync-spec.js
--- a/keyserver/src/shared/state-sync/state-sync-spec.js
+++ b/keyserver/src/shared/state-sync/state-sync-spec.js
@@ -5,11 +5,16 @@
 
 import type { Viewer } from '../../session/viewer.js';
 
-export type ServerStateSyncSpec<Infos, FullSocketSyncPayload, Info> = {
+export type ServerStateSyncSpec<
+  Infos,
+  FullSocketSyncPayload,
+  Info,
+  Inconsistencies,
+> = {
   +fetch: (viewer: Viewer, ids?: $ReadOnlySet<string>) => Promise<Infos>,
   +fetchFullSocketSyncPayload: (
     viewer: Viewer,
     calendarQuery: $ReadOnlyArray<CalendarQuery>,
   ) => Promise<FullSocketSyncPayload>,
-  ...StateSyncSpec<Infos, Info>,
+  ...StateSyncSpec<Infos, Info, Inconsistencies>,
 };
diff --git a/keyserver/src/shared/state-sync/state-sync-specs.js b/keyserver/src/shared/state-sync/state-sync-specs.js
--- a/keyserver/src/shared/state-sync/state-sync-specs.js
+++ b/keyserver/src/shared/state-sync/state-sync-specs.js
@@ -14,5 +14,5 @@
 });
 
 (serverStateSyncSpecs: {
-  +[string]: ServerStateSyncSpec<any, any, any>,
+  +[string]: ServerStateSyncSpec<any, any, any, any>,
 });
diff --git a/keyserver/src/shared/state-sync/threads-state-sync-spec.js b/keyserver/src/shared/state-sync/threads-state-sync-spec.js
--- a/keyserver/src/shared/state-sync/threads-state-sync-spec.js
+++ b/keyserver/src/shared/state-sync/threads-state-sync-spec.js
@@ -1,6 +1,7 @@
 // @flow
 
 import { threadsStateSyncSpec as libSpec } from 'lib/shared/state-sync/threads-state-sync-spec.js';
+import type { ClientThreadInconsistencyReportCreationRequest } from 'lib/types/report-types.js';
 import {
   type RawThreadInfos,
   type RawThreadInfo,
@@ -14,6 +15,7 @@
   RawThreadInfos,
   RawThreadInfos,
   RawThreadInfo,
+  $ReadOnlyArray<ClientThreadInconsistencyReportCreationRequest>,
 > = Object.freeze({
   async fetch(viewer: Viewer, ids?: $ReadOnlySet<string>) {
     const filter = ids ? { threadIDs: ids } : undefined;
diff --git a/keyserver/src/shared/state-sync/users-state-sync-spec.js b/keyserver/src/shared/state-sync/users-state-sync-spec.js
--- a/keyserver/src/shared/state-sync/users-state-sync-spec.js
+++ b/keyserver/src/shared/state-sync/users-state-sync-spec.js
@@ -1,6 +1,7 @@
 // @flow
 
 import { usersStateSyncSpec as libSpec } from 'lib/shared/state-sync/users-state-sync-spec.js';
+import type { UserInconsistencyReportCreationRequest } from 'lib/types/report-types.js';
 import type { UserInfos, UserInfo } from 'lib/types/user-types.js';
 import { values } from 'lib/utils/objects.js';
 
@@ -12,6 +13,7 @@
   UserInfos,
   $ReadOnlyArray<UserInfo>,
   UserInfo,
+  $ReadOnlyArray<UserInconsistencyReportCreationRequest>,
 > = Object.freeze({
   fetch(viewer: Viewer, ids?: $ReadOnlySet<string>) {
     if (ids) {
diff --git a/lib/reducers/entry-reducer.js b/lib/reducers/entry-reducer.js
--- a/lib/reducers/entry-reducer.js
+++ b/lib/reducers/entry-reducer.js
@@ -39,23 +39,13 @@
   deleteAccountActionTypes,
   logInActionTypes,
 } from '../actions/user-actions.js';
-import {
-  entryID,
-  filterRawEntryInfosByCalendarQuery,
-  serverEntryInfosObject,
-} from '../shared/entry-utils.js';
+import { entryID } from '../shared/entry-utils.js';
+import { stateSyncSpecs } from '../shared/state-sync/state-sync-specs.js';
 import { threadInFilterList } from '../shared/thread-utils.js';
 import { updateSpecs } from '../shared/updates/update-specs.js';
-import type {
-  RawEntryInfo,
-  EntryStore,
-  CalendarQuery,
-} from '../types/entry-types.js';
+import type { RawEntryInfo, EntryStore } from '../types/entry-types.js';
 import type { BaseAction } from '../types/redux-types.js';
-import {
-  type ClientEntryInconsistencyReportCreationRequest,
-  reportTypes,
-} from '../types/report-types.js';
+import { type ClientEntryInconsistencyReportCreationRequest } from '../types/report-types.js';
 import {
   serverRequestTypes,
   processServerRequestsActionType,
@@ -69,13 +59,9 @@
   type ClientUpdateInfo,
   processUpdatesActionType,
 } from '../types/update-types.js';
-import { actionLogger } from '../utils/action-logger.js';
 import { setNewSessionActionType } from '../utils/action-utils.js';
-import { getConfig } from '../utils/config.js';
 import { dateString } from '../utils/date-utils.js';
 import { values } from '../utils/objects.js';
-import { generateReportID } from '../utils/report-utils.js';
-import { sanitizeActionSecrets } from '../utils/sanitization.js';
 
 function daysToEntriesFromEntryInfos(
   entryInfos: $ReadOnlyArray<RawEntryInfo>,
@@ -623,11 +609,10 @@
       );
     }
 
-    const newInconsistencies = findInconsistencies(
+    const newInconsistencies = stateSyncSpecs.entries.findStoreInconsistencies(
       action,
       entryInfos,
       updatedEntryInfos,
-      action.payload.calendarQuery,
     );
 
     return [
@@ -660,41 +645,6 @@
   return mergedEntryInfos;
 }
 
-const emptyArray = [];
-function findInconsistencies(
-  action: BaseAction,
-  beforeStateCheck: { +[id: string]: RawEntryInfo },
-  afterStateCheck: { +[id: string]: RawEntryInfo },
-  calendarQuery: CalendarQuery,
-): ClientEntryInconsistencyReportCreationRequest[] {
-  // We don't want to bother reporting an inconsistency if it's just because of
-  // extraneous EntryInfos (not within the current calendarQuery) on either side
-  const filteredBeforeResult = filterRawEntryInfosByCalendarQuery(
-    serverEntryInfosObject(values(beforeStateCheck)),
-    calendarQuery,
-  );
-  const filteredAfterResult = filterRawEntryInfosByCalendarQuery(
-    serverEntryInfosObject(values(afterStateCheck)),
-    calendarQuery,
-  );
-  if (_isEqual(filteredBeforeResult)(filteredAfterResult)) {
-    return emptyArray;
-  }
-  return [
-    {
-      type: reportTypes.ENTRY_INCONSISTENCY,
-      platformDetails: getConfig().platformDetails,
-      beforeAction: beforeStateCheck,
-      action: sanitizeActionSecrets(action),
-      calendarQuery,
-      pushResult: afterStateCheck,
-      lastActions: actionLogger.interestingActionSummaries,
-      time: Date.now(),
-      id: generateReportID(),
-    },
-  ];
-}
-
 function markDeletedEntries(
   entryInfos: { +[id: string]: RawEntryInfo },
   deletedEntryIDs: $ReadOnlyArray<string>,
diff --git a/lib/reducers/thread-reducer.js b/lib/reducers/thread-reducer.js
--- a/lib/reducers/thread-reducer.js
+++ b/lib/reducers/thread-reducer.js
@@ -1,7 +1,5 @@
 // @flow
 
-import _isEqual from 'lodash/fp/isEqual.js';
-
 import {
   setThreadUnreadStatusActionTypes,
   updateActivityActionTypes,
@@ -31,12 +29,10 @@
   type ThreadStoreOperation,
   threadStoreOpsHandlers,
 } from '../ops/thread-store-ops.js';
+import { stateSyncSpecs } from '../shared/state-sync/state-sync-specs.js';
 import { updateSpecs } from '../shared/updates/update-specs.js';
 import type { BaseAction } from '../types/redux-types.js';
-import {
-  type ClientThreadInconsistencyReportCreationRequest,
-  reportTypes,
-} from '../types/report-types.js';
+import { type ClientThreadInconsistencyReportCreationRequest } from '../types/report-types.js';
 import {
   serverRequestTypes,
   processServerRequestsActionType,
@@ -50,11 +46,7 @@
   type ClientUpdateInfo,
   processUpdatesActionType,
 } from '../types/update-types.js';
-import { actionLogger } from '../utils/action-logger.js';
 import { setNewSessionActionType } from '../utils/action-utils.js';
-import { getConfig } from '../utils/config.js';
-import { generateReportID } from '../utils/report-utils.js';
-import { sanitizeActionSecrets } from '../utils/sanitization.js';
 
 const { processStoreOperations: processThreadStoreOperations } =
   threadStoreOpsHandlers;
@@ -77,28 +69,6 @@
     .flat();
 }
 
-function findInconsistencies(
-  action: BaseAction,
-  beforeStateCheck: { +[id: string]: RawThreadInfo },
-  afterStateCheck: { +[id: string]: RawThreadInfo },
-): ClientThreadInconsistencyReportCreationRequest[] {
-  if (_isEqual(beforeStateCheck)(afterStateCheck)) {
-    return [];
-  }
-  return [
-    {
-      type: reportTypes.THREAD_INCONSISTENCY,
-      platformDetails: getConfig().platformDetails,
-      beforeAction: beforeStateCheck,
-      action: sanitizeActionSecrets(action),
-      pushResult: afterStateCheck,
-      lastActions: actionLogger.interestingActionSummaries,
-      time: Date.now(),
-      id: generateReportID(),
-    },
-  ];
-}
-
 function reduceThreadInfos(
   state: ThreadStore,
   action: BaseAction,
@@ -310,11 +280,12 @@
       threadStoreOperations,
     );
 
-    const newThreadInconsistencies = findInconsistencies(
-      action,
-      state.threadInfos,
-      updatedThreadStore.threadInfos,
-    );
+    const newThreadInconsistencies =
+      stateSyncSpecs.threads.findStoreInconsistencies(
+        action,
+        state.threadInfos,
+        updatedThreadStore.threadInfos,
+      );
 
     return {
       threadStore: updatedThreadStore,
diff --git a/lib/reducers/user-reducer.js b/lib/reducers/user-reducer.js
--- a/lib/reducers/user-reducer.js
+++ b/lib/reducers/user-reducer.js
@@ -17,12 +17,9 @@
   updateUserAvatarActionTypes,
   resetUserStateActionType,
 } from '../actions/user-actions.js';
+import { stateSyncSpecs } from '../shared/state-sync/state-sync-specs.js';
 import { updateSpecs } from '../shared/updates/update-specs.js';
 import type { BaseAction } from '../types/redux-types.js';
-import {
-  type UserInconsistencyReportCreationRequest,
-  reportTypes,
-} from '../types/report-types.js';
 import {
   serverRequestTypes,
   processServerRequestsActionType,
@@ -33,16 +30,8 @@
 } from '../types/socket-types.js';
 import { updateTypes } from '../types/update-types-enum.js';
 import { processUpdatesActionType } from '../types/update-types.js';
-import type {
-  CurrentUserInfo,
-  UserStore,
-  UserInfos,
-} from '../types/user-types.js';
-import { actionLogger } from '../utils/action-logger.js';
+import type { CurrentUserInfo, UserStore } from '../types/user-types.js';
 import { setNewSessionActionType } from '../utils/action-utils.js';
-import { getConfig } from '../utils/config.js';
-import { generateReportID } from '../utils/report-utils.js';
-import { sanitizeActionSecrets } from '../utils/sanitization.js';
 
 function reduceCurrentUserInfo(
   state: ?CurrentUserInfo,
@@ -130,28 +119,6 @@
   return state;
 }
 
-function findInconsistencies(
-  action: BaseAction,
-  beforeStateCheck: UserInfos,
-  afterStateCheck: UserInfos,
-): UserInconsistencyReportCreationRequest[] {
-  if (_isEqual(beforeStateCheck)(afterStateCheck)) {
-    return [];
-  }
-  return [
-    {
-      type: reportTypes.USER_INCONSISTENCY,
-      platformDetails: getConfig().platformDetails,
-      action: sanitizeActionSecrets(action),
-      beforeStateCheck,
-      afterStateCheck,
-      lastActions: actionLogger.interestingActionSummaries,
-      time: Date.now(),
-      id: generateReportID(),
-    },
-  ];
-}
-
 function reduceUserInfos(state: UserStore, action: BaseAction): UserStore {
   if (
     action.type === joinThreadActionTypes.success ||
@@ -242,7 +209,7 @@
       }
     }
 
-    const newInconsistencies = findInconsistencies(
+    const newInconsistencies = stateSyncSpecs.users.findStoreInconsistencies(
       action,
       state.userInfos,
       newUserInfos,
diff --git a/lib/shared/state-sync/current-user-state-sync-spec.js b/lib/shared/state-sync/current-user-state-sync-spec.js
--- a/lib/shared/state-sync/current-user-state-sync-spec.js
+++ b/lib/shared/state-sync/current-user-state-sync-spec.js
@@ -11,6 +11,7 @@
 export const currentUserStateSyncSpec: StateSyncSpec<
   CurrentUserInfo,
   CurrentUserInfo,
+  void,
 > = Object.freeze({
   hashKey: 'currentUserInfo',
   convertClientToServerInfos(info: CurrentUserInfo) {
@@ -20,4 +21,7 @@
       info,
     );
   },
+  findStoreInconsistencies() {
+    return undefined;
+  },
 });
diff --git a/lib/shared/state-sync/entries-state-sync-spec.js b/lib/shared/state-sync/entries-state-sync-spec.js
--- a/lib/shared/state-sync/entries-state-sync-spec.js
+++ b/lib/shared/state-sync/entries-state-sync-spec.js
@@ -1,5 +1,6 @@
 // @flow
 
+import _isEqual from 'lodash/fp/isEqual.js';
 import t from 'tcomb';
 
 import type { StateSyncSpec } from './state-sync-spec.js';
@@ -9,35 +10,83 @@
   rawEntryInfoValidator,
   type RawEntryInfo,
 } from '../../types/entry-types.js';
+import {
+  reportTypes,
+  type ClientEntryInconsistencyReportCreationRequest,
+} from '../../types/report-types.js';
+import type { ProcessServerRequestAction } from '../../types/request-types.js';
+import { actionLogger } from '../../utils/action-logger.js';
+import { getConfig } from '../../utils/config.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
 import { values } from '../../utils/objects.js';
+import { generateReportID } from '../../utils/report-utils.js';
+import { sanitizeActionSecrets } from '../../utils/sanitization.js';
 import { ashoatKeyserverID, tID } from '../../utils/validation-utils.js';
 import {
   filterRawEntryInfosByCalendarQuery,
   serverEntryInfosObject,
 } from '../entry-utils.js';
 
-export const entriesStateSyncSpec: StateSyncSpec<RawEntryInfos, RawEntryInfo> =
-  Object.freeze({
-    hashKey: 'entryInfos',
-    innerHashSpec: {
-      hashKey: 'entryInfo',
-      deleteKey: 'deleteEntryIDs',
-      rawInfosKey: 'rawEntryInfos',
-    },
-    convertClientToServerInfos(
-      infos: RawEntryInfos,
-      calendarQuery: CalendarQuery,
-    ) {
-      const filteredEntryInfos = filterRawEntryInfosByCalendarQuery(
-        serverEntryInfosObject(values(infos)),
+export const entriesStateSyncSpec: StateSyncSpec<
+  RawEntryInfos,
+  RawEntryInfo,
+  $ReadOnlyArray<ClientEntryInconsistencyReportCreationRequest>,
+> = Object.freeze({
+  hashKey: 'entryInfos',
+  innerHashSpec: {
+    hashKey: 'entryInfo',
+    deleteKey: 'deleteEntryIDs',
+    rawInfosKey: 'rawEntryInfos',
+  },
+  convertClientToServerInfos(
+    infos: RawEntryInfos,
+    calendarQuery: CalendarQuery,
+  ) {
+    const filteredEntryInfos = filterRawEntryInfosByCalendarQuery(
+      serverEntryInfosObject(values(infos)),
+      calendarQuery,
+    );
+
+    return convertClientIDsToServerIDs(
+      ashoatKeyserverID,
+      t.dict(tID, rawEntryInfoValidator),
+      filteredEntryInfos,
+    );
+  },
+  findStoreInconsistencies(
+    action: ProcessServerRequestAction,
+    beforeStateCheck: RawEntryInfos,
+    afterStateCheck: RawEntryInfos,
+  ) {
+    const calendarQuery = action.payload.calendarQuery;
+    // We don't want to bother reporting an inconsistency if it's just because
+    // of extraneous EntryInfos (not within the current calendarQuery) on either
+    // side
+    const filteredBeforeResult = filterRawEntryInfosByCalendarQuery(
+      serverEntryInfosObject(values(beforeStateCheck)),
+      calendarQuery,
+    );
+    const filteredAfterResult = filterRawEntryInfosByCalendarQuery(
+      serverEntryInfosObject(values(afterStateCheck)),
+      calendarQuery,
+    );
+    if (_isEqual(filteredBeforeResult)(filteredAfterResult)) {
+      return emptyArray;
+    }
+    return [
+      {
+        type: reportTypes.ENTRY_INCONSISTENCY,
+        platformDetails: getConfig().platformDetails,
+        beforeAction: beforeStateCheck,
+        action: sanitizeActionSecrets(action),
         calendarQuery,
-      );
+        pushResult: afterStateCheck,
+        lastActions: actionLogger.interestingActionSummaries,
+        time: Date.now(),
+        id: generateReportID(),
+      },
+    ];
+  },
+});
 
-      return convertClientIDsToServerIDs(
-        ashoatKeyserverID,
-        t.dict(tID, rawEntryInfoValidator),
-        filteredEntryInfos,
-      );
-    },
-  });
+const emptyArray = [];
diff --git a/lib/shared/state-sync/state-sync-spec.js b/lib/shared/state-sync/state-sync-spec.js
--- a/lib/shared/state-sync/state-sync-spec.js
+++ b/lib/shared/state-sync/state-sync-spec.js
@@ -1,8 +1,9 @@
 // @flow
 
 import type { CalendarQuery } from '../../types/entry-types.js';
+import type { ProcessServerRequestAction } from '../../types/request-types.js';
 
-export type StateSyncSpec<Infos, Info> = {
+export type StateSyncSpec<Infos, Info, Inconsistencies> = {
   +hashKey: string,
   +innerHashSpec?: {
     +hashKey: string,
@@ -14,4 +15,9 @@
     infos: Infos,
     calendarQuery: CalendarQuery,
   ) => Infos,
+  +findStoreInconsistencies: (
+    action: ProcessServerRequestAction,
+    beforeStateCheck: Infos,
+    afterStateCheck: Infos,
+  ) => Inconsistencies,
 };
diff --git a/lib/shared/state-sync/state-sync-specs.js b/lib/shared/state-sync/state-sync-specs.js
--- a/lib/shared/state-sync/state-sync-specs.js
+++ b/lib/shared/state-sync/state-sync-specs.js
@@ -14,5 +14,5 @@
 });
 
 (stateSyncSpecs: {
-  +[string]: StateSyncSpec<any, any>,
+  +[string]: StateSyncSpec<any, any, any>,
 });
diff --git a/lib/shared/state-sync/threads-state-sync-spec.js b/lib/shared/state-sync/threads-state-sync-spec.js
--- a/lib/shared/state-sync/threads-state-sync-spec.js
+++ b/lib/shared/state-sync/threads-state-sync-spec.js
@@ -1,19 +1,30 @@
 // @flow
 
+import _isEqual from 'lodash/fp/isEqual.js';
 import t from 'tcomb';
 
 import type { StateSyncSpec } from './state-sync-spec.js';
+import {
+  reportTypes,
+  type ClientThreadInconsistencyReportCreationRequest,
+} from '../../types/report-types.js';
+import type { ProcessServerRequestAction } from '../../types/request-types.js';
 import {
   type RawThreadInfos,
   type RawThreadInfo,
   rawThreadInfoValidator,
 } from '../../types/thread-types.js';
+import { actionLogger } from '../../utils/action-logger.js';
+import { getConfig } from '../../utils/config.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
+import { generateReportID } from '../../utils/report-utils.js';
+import { sanitizeActionSecrets } from '../../utils/sanitization.js';
 import { ashoatKeyserverID, tID } from '../../utils/validation-utils.js';
 
 export const threadsStateSyncSpec: StateSyncSpec<
   RawThreadInfos,
   RawThreadInfo,
+  $ReadOnlyArray<ClientThreadInconsistencyReportCreationRequest>,
 > = Object.freeze({
   hashKey: 'threadInfos',
   innerHashSpec: {
@@ -28,4 +39,27 @@
       infos,
     );
   },
+  findStoreInconsistencies(
+    action: ProcessServerRequestAction,
+    beforeStateCheck: RawThreadInfos,
+    afterStateCheck: RawThreadInfos,
+  ) {
+    if (_isEqual(beforeStateCheck)(afterStateCheck)) {
+      return emptyArray;
+    }
+    return [
+      {
+        type: reportTypes.THREAD_INCONSISTENCY,
+        platformDetails: getConfig().platformDetails,
+        beforeAction: beforeStateCheck,
+        action: sanitizeActionSecrets(action),
+        pushResult: afterStateCheck,
+        lastActions: actionLogger.interestingActionSummaries,
+        time: Date.now(),
+        id: generateReportID(),
+      },
+    ];
+  },
 });
+
+const emptyArray = [];
diff --git a/lib/shared/state-sync/users-state-sync-spec.js b/lib/shared/state-sync/users-state-sync-spec.js
--- a/lib/shared/state-sync/users-state-sync-spec.js
+++ b/lib/shared/state-sync/users-state-sync-spec.js
@@ -1,30 +1,67 @@
 // @flow
 
+import _isEqual from 'lodash/fp/isEqual.js';
+
 import type { StateSyncSpec } from './state-sync-spec.js';
+import {
+  reportTypes,
+  type UserInconsistencyReportCreationRequest,
+} from '../../types/report-types.js';
+import type { ProcessServerRequestAction } from '../../types/request-types.js';
 import {
   type UserInfo,
   type UserInfos,
   userInfosValidator,
 } from '../../types/user-types.js';
+import { actionLogger } from '../../utils/action-logger.js';
+import { getConfig } from '../../utils/config.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
+import { generateReportID } from '../../utils/report-utils.js';
+import { sanitizeActionSecrets } from '../../utils/sanitization.js';
 import { ashoatKeyserverID } from '../../utils/validation-utils.js';
 
-export const usersStateSyncSpec: StateSyncSpec<UserInfos, UserInfo> =
-  Object.freeze({
-    hashKey: 'userInfos',
-    innerHashSpec: {
-      hashKey: 'userInfo',
-      deleteKey: 'deleteUserInfoIDs',
-      rawInfosKey: 'userInfos',
-      additionalDeleteCondition(user: UserInfo) {
-        return !user.username;
-      },
+export const usersStateSyncSpec: StateSyncSpec<
+  UserInfos,
+  UserInfo,
+  $ReadOnlyArray<UserInconsistencyReportCreationRequest>,
+> = Object.freeze({
+  hashKey: 'userInfos',
+  innerHashSpec: {
+    hashKey: 'userInfo',
+    deleteKey: 'deleteUserInfoIDs',
+    rawInfosKey: 'userInfos',
+    additionalDeleteCondition(user: UserInfo) {
+      return !user.username;
     },
-    convertClientToServerInfos(infos: UserInfos) {
-      return convertClientIDsToServerIDs(
-        ashoatKeyserverID,
-        userInfosValidator,
-        infos,
-      );
-    },
-  });
+  },
+  convertClientToServerInfos(infos: UserInfos) {
+    return convertClientIDsToServerIDs(
+      ashoatKeyserverID,
+      userInfosValidator,
+      infos,
+    );
+  },
+  findStoreInconsistencies(
+    action: ProcessServerRequestAction,
+    beforeStateCheck: UserInfos,
+    afterStateCheck: UserInfos,
+  ) {
+    if (_isEqual(beforeStateCheck)(afterStateCheck)) {
+      return emptyArray;
+    }
+    return [
+      {
+        type: reportTypes.USER_INCONSISTENCY,
+        platformDetails: getConfig().platformDetails,
+        action: sanitizeActionSecrets(action),
+        beforeStateCheck,
+        afterStateCheck,
+        lastActions: actionLogger.interestingActionSummaries,
+        time: Date.now(),
+        id: generateReportID(),
+      },
+    ];
+  },
+});
+
+const emptyArray = [];
diff --git a/lib/types/redux-types.js b/lib/types/redux-types.js
--- a/lib/types/redux-types.js
+++ b/lib/types/redux-types.js
@@ -83,7 +83,7 @@
   ClientReportCreationRequest,
 } from './report-types.js';
 import type {
-  ProcessServerRequestsPayload,
+  ProcessServerRequestAction,
   GetOlmSessionInitializationDataResponse,
 } from './request-types.js';
 import type {
@@ -778,10 +778,7 @@
       +type: 'INCREMENTAL_STATE_SYNC',
       +payload: StateSyncIncrementalActionPayload,
     }
-  | {
-      +type: 'PROCESS_SERVER_REQUESTS',
-      +payload: ProcessServerRequestsPayload,
-    }
+  | ProcessServerRequestAction
   | {
       +type: 'UPDATE_CONNECTION_STATUS',
       +payload: UpdateConnectionStatusPayload,
diff --git a/lib/types/request-types.js b/lib/types/request-types.js
--- a/lib/types/request-types.js
+++ b/lib/types/request-types.js
@@ -272,6 +272,10 @@
   +serverRequests: $ReadOnlyArray<ClientServerRequest>,
   +calendarQuery: CalendarQuery,
 };
+export type ProcessServerRequestAction = {
+  +type: 'PROCESS_SERVER_REQUESTS',
+  +payload: ProcessServerRequestsPayload,
+};
 
 export type GetSessionPublicKeysArgs = {
   +session: string,