diff --git a/packages/core/src/store.ts b/packages/core/src/store.ts
index a585147129..6b319dc4d3 100644
--- a/packages/core/src/store.ts
+++ b/packages/core/src/store.ts
@@ -102,7 +102,7 @@ import { addPrInfoImpl, addSteeringCommentImpl, archiveAllDoneImpl, cleanupStale
 import { approveCliAutonomyImpl, approveWorkflowCliCommandImpl, cleanupOrphanedMaterializedStepsImpl, consumePluginGateVerdictsImpl, getAgentLogsByTimeRangeImpl, getDatabaseHealthImpl, getDistributedTaskIdAllocatorImpl, getExperimentSessionStoreImpl, getInReviewDurationEventsImpl, getMissionStoreImpl, getIdeationStoreImpl, getPluginStoreImpl, getSecretsStoreImpl, getSettingsSyncImpl, getTaskMergedTaskIdsImpl, getTaskWorkflowSelectionImpl, getImportTranslationImpl, recordImportTranslationImpl, pruneImportTranslationsImpl, type ImportTranslationCacheKey, type ImportTranslationCacheEntry, getVerificationCacheHitImpl, getWorkflowDefinitionImpl, healthCheckImpl, importLegacyAgentLogsOnceImpl, insertWorkflowDefinitionSyncImpl, isCliAutonomyApprovedImpl, isPluginInstalledImpl, isWorkflowCliCommandApprovedImpl, listWorkflowDefinitionsImpl, materializeExplicitWorkflowStepsImpl, materializeWorkflowStepsImpl, migrateActiveArchivedTasksToArchiveDbImpl, migrateLegacyArchiveEntriesToArchiveDbImpl, nextWorkflowDefinitionIdImpl, occupantsByColumnForWorkflowImpl, parseWorkflowLayoutImpl, pruneAgentLogFilesImpl, purgeTaskWorkflowSelectionRowsImpl, readAllWorkflowDefinitionsImpl, readRawProjectSettingsImpl, recordPluginGateVerdictImpl, recordVerificationCachePassImpl, removeMaterializedSelectionImpl, resolvePluginWorkflowStepImpl, resolveTaskWorkflowIrSyncImpl, revokeCliAutonomyImpl, selectTaskWorkflowAndReconcileImpl, writeTaskWorkflowSelectionImpl, getTaskWorkflowSelectionAsyncImpl,  } from "./task-store/workflow-definitions.js";
 import { getTaskCommitAssociationsByLineageIdImpl, replaceLegacyTaskCommitAssociationsImpl } from "./task-store/task-commit-associations.js";
 import { findRecentTasksBySourceParentTaskIdImpl } from "./task-store/branch-and-pr-entities.js";
-import { addTaskCommentImpl, applyBuiltInPromptOverridesAsyncImpl, applyBuiltInPromptOverridesSyncImpl, areAllDependenciesDoneImpl, artifactStoredNameImpl, assertWorkflowIrTraitsValidImpl, clearActivityLogImpl, clearTaskWorkflowSelectionImpl, deleteTaskByIdImpl, getDefaultWorkflowIdImpl, resolveOriginWorkflowOverrideIdImpl, type TaskOriginWorkflowKind, getInsightStoreImpl, getMergeQueuedTaskIdsImpl, getMergeRequestRecordImpl, getMergeRequestRecordAsyncImpl, getResearchStoreImpl, getTaskIdFromDirImpl, getTodoStoreImpl, getWorkflowWorkItemByIdentityImpl, hasActiveTaskImpl, invalidateConfigCacheAfterMigrationImpl, isTaskIdConflictErrorImpl, listLegacyAutoMergeStampCandidatesImpl, readTaskRowFromDbImpl, recordBranchGroupMemberLandedImpl, refreshDatabaseHealthAsyncImpl, refreshDatabaseHealthImpl, resolveEffectiveWorkflowIdSyncImpl, resolveTaskCustomFieldDefsSyncImpl, resolveWorkflowBypassGuardsImpl, serializeConfigForDiskImpl, setPluginWorkflowStepTemplatesImpl, shouldSkipWorkflowMovePoliciesImpl, suppressWatcherImpl, upsertTaskWithFtsRecoveryImpl } from "./task-store/task-store-helpers.js";
+import { addTaskCommentImpl, applyBuiltInPromptOverridesAsyncImpl, applyBuiltInPromptOverridesSyncImpl, areAllDependenciesDoneImpl, artifactStoredNameImpl, assertWorkflowIrTraitsValidImpl, clearActivityLogImpl, clearTaskWorkflowSelectionImpl, deleteTaskByIdImpl, getDefaultWorkflowIdImpl, resolveOriginWorkflowOverrideIdImpl, type TaskOriginWorkflowKind, getInsightStoreImpl, getMergeQueuedTaskIdsImpl, getMergeRequestRecordImpl, getMergeRequestRecordAsyncImpl, getResearchStoreImpl, getTaskIdFromDirImpl, getTodoStoreImpl, getWorkflowWorkItemByIdentityImpl, hasActiveTaskImpl, invalidateConfigCacheAfterMigrationImpl, isTaskIdConflictErrorImpl, listLegacyAutoMergeStampCandidatesImpl, readTaskRowFromDbImpl, recordBranchGroupMemberLandedImpl, refreshDatabaseHealthAsyncImpl, refreshDatabaseHealthImpl, resolveTaskCustomFieldDefsSyncImpl, resolveWorkflowBypassGuardsImpl, serializeConfigForDiskImpl, setPluginWorkflowStepTemplatesImpl, shouldSkipWorkflowMovePoliciesImpl, suppressWatcherImpl, upsertTaskWithFtsRecoveryImpl } from "./task-store/task-store-helpers.js";
 import { getTaskSelectClauseImpl2, createTaskPersistSerializationContextImpl, getTaskPersistValuesImpl, getTaskPatchDescriptorsImpl, normalizeTaskFromDiskImpl, writeTaskJsonFileImpl, rowToPrEntityImpl, generatePrEntityIdImpl, readTaskForMoveImpl, rowToMergeQueueEntryImpl, rowToMergeRequestRecordImpl, rowToCompletionHandoffMarkerImpl, rowToWorkflowWorkItemImpl, rowToRunAuditEventImpl } from "./task-store/task-row-mappers.js";
 import { getTaskSelectClauseWithActivityLogLimitImpl, getChangedTaskColumnsImpl, getSoftDeletedWriteConflictImpl, readTaskJsonImpl, writeConfigImpl, _maybeAutoArchiveSameAgentDuplicateBackendImpl, updateBranchGroupImpl, updatePrEntityImpl, listTasksForGithubTrackingReconcileImpl, listTasksForGitlabTrackingReconcileImpl, renewCheckoutLeaseImpl, updateTaskAtomicImpl, resolveTaskWedgeNotificationEpisodeImpl, getWorkflowPromptOverridesImpl, updateWorkflowSettingValuesImpl, rollbackConfigurationImpl, cancelActiveWorkflowWorkItemsForTaskImpl, setCompletionHandoffAcceptedMarkerImpl, reconcileLegacyAutoMergeStampsImpl, recoverExpiredMergeQueueLeasesImpl, rewriteDependentsForRemovalImpl, cleanupBranchForTaskImpl, addAttachmentImpl, deleteAttachmentImpl, registerArtifactImpl, updatePrInfoImpl, unlinkGithubIssueImpl, cleanupArchivedTasksImpl, generatePromptFromArchiveEntryImpl, listWorkflowOccupantTaskIdsImpl, listApprovedCliAutonomyAdaptersImpl, closeImpl, getActivityLogImpl } from "./task-store/task-mutation-ops.js";
 import { getOrCreateForProjectImpl, listGoalCitationsImpl, atomicWriteTaskJsonWithAuditImpl, duplicateTaskImpl, listStrandedRefinementsImpl, tryClaimCheckoutImpl, evaluateWorkflowMovePoliciesImpl, recordRunAuditEventImpl, getRunAuditEventsImpl, dequeueMergeQueueOnColumnExitImpl, updateIssueInfoImpl, listWorkflowStepsImpl, getWorkflowStepImpl, createWorkflowDefinitionImpl, countActiveInCapacitySlotSyncImpl, countActiveInCapacitySlotAsyncImpl, generateSpecifiedPromptImpl, recordActivityImpl, getEvalStoreImpl } from "./task-store/project-store-ops.js";
@@ -2532,9 +2532,6 @@ Issue #2149 requires read-only type filtering to occur in the file-store before
   public resolveTaskWorkflowIrSync(taskId: string): WorkflowIr {
     return resolveTaskWorkflowIrSyncImpl(this, taskId);
   }
-  public resolveEffectiveWorkflowIdSync(taskId: string): string {
-    return resolveEffectiveWorkflowIdSyncImpl(this, taskId);
-  }
   public countActiveInCapacitySlotSync(params: { targetColumn: string; workflowId: string; countPending: boolean; excludeTaskId: string; }): number {
     return countActiveInCapacitySlotSyncImpl(this, params);
   }
diff --git a/packages/core/src/task-store/task-store-helpers.ts b/packages/core/src/task-store/task-store-helpers.ts
index 7824fe2ce9..20d4c8290a 100644
--- a/packages/core/src/task-store/task-store-helpers.ts
+++ b/packages/core/src/task-store/task-store-helpers.ts
@@ -11,7 +11,6 @@
  */
 
 import { TaskStore } from "../store.js";
-import { resolveCapacityPoolId } from "../workflow-capacity.js";
 import { isBuiltinWorkflowId } from "../builtin-workflows.js";
 import { InsightStore } from "../insight-store.js";
 import { ResearchStore } from "../research-store.js";
@@ -286,11 +285,6 @@ export function resolveTaskCustomFieldDefsSyncImpl(store: TaskStore, taskId: str
     return ir.version === "v2" ? (ir.fields ?? []) : [];
 }
 
-export function resolveEffectiveWorkflowIdSyncImpl(store: TaskStore, taskId: string): string {
-    const selection = store.getTaskWorkflowSelection(taskId);
-    return resolveCapacityPoolId(selection?.workflowId);
-}
-
 export async function clearTaskWorkflowSelectionImpl(store: TaskStore, taskId: string): Promise<void> {
     await store.withTaskLock(taskId, async () => {
       await store.removeMaterializedSelection(taskId);
diff --git a/packages/core/src/task-store/workflow-definitions.ts b/packages/core/src/task-store/workflow-definitions.ts
index 47c4396f7b..e629193e14 100644
--- a/packages/core/src/task-store/workflow-definitions.ts
+++ b/packages/core/src/task-store/workflow-definitions.ts
@@ -505,7 +505,7 @@ export function resolveTaskWorkflowIrSyncImpl(store: TaskStore, taskId: string):
 export function getTaskWorkflowSelectionImpl(_store: TaskStore, _taskId: string): { workflowId: string; stepIds: string[] } | undefined {
     /*
     FNXC:PostgresCutover 2026-07-04-00:00:
-    Backend mode cannot synchronously read PostgreSQL, so return undefined and let the sync readers (resolveEffectiveWorkflowIdSync / resolveTaskWorkflowIrSync) fall back to their defaults. The authoritative read is getTaskWorkflowSelectionAsync; this also converts the prior PG-mode throw into a graceful default.
+    Backend mode cannot synchronously read PostgreSQL, so return undefined and let the sync reader (resolveTaskWorkflowIrSync) fall back to its default. The authoritative read is getTaskWorkflowSelectionAsync; this also converts the prior PG-mode throw into a graceful default.
     */
     /* FNXC:SqliteDualPathCleanup 2026-07-26-14:20: sync selection reader is incomplete-PG; use getTaskWorkflowSelectionAsync. */
     return undefined;