diff --git a/apps/hash-ai-worker-ts/README.md b/apps/hash-ai-worker-ts/README.md
index fd9d5ee4767..c5b73a43c03 100644
--- a/apps/hash-ai-worker-ts/README.md
+++ b/apps/hash-ai-worker-ts/README.md
@@ -25,6 +25,7 @@ The service uses the following environment variables:
 
 ### Run the worker
 
+- To use actions which require Google Cloud Platform, you must run `gcloud auth application-default login` before starting the worker.
 - Ensure the environment variables above are set, either in `.env.local` or in your shell.
 - Install dependencies:
   - `yarn`
diff --git a/apps/hash-ai-worker-ts/package.json b/apps/hash-ai-worker-ts/package.json
index e78a761becc..b1c9872955e 100644
--- a/apps/hash-ai-worker-ts/package.json
+++ b/apps/hash-ai-worker-ts/package.json
@@ -38,6 +38,7 @@
     "start:healthcheck": "wait-on --timeout 120000 http-get://localhost:4100/health",
     "start:test": "NODE_ENV=test NODE_OPTIONS=--max-old-space-size=2048 node ./dist/main.js",
     "start:test:healthcheck": "wait-on --timeout 120000 http-get://localhost:4100/health",
+    "temporal:clean": "temporal workflow terminate --query \"TaskQueue='ai'\" --reason=\"Batch terminate from CLI\"",
     "test:unit": "vitest --run  --exclude \"**/*.ai.test.ts\""
   },
   "dependencies": {
diff --git a/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entities-action.ts b/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entities-action.ts
index b2207393867..668d04b4010 100644
--- a/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entities-action.ts
+++ b/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entities-action.ts
@@ -191,7 +191,9 @@ export const persistEntitiesAction: FlowActionActivity = async ({ inputs }) => {
     if (!output) {
       failedEntitiesByLocalId[unresolvedEntity.localEntityId] = {
         proposedEntity: unresolvedEntity,
-        message: `No outputs returned when attempting to persist entity`,
+        message:
+          persistedEntityOutputs.message ??
+          `No outputs returned when attempting to persist entity`,
       };
       continue;
     }
diff --git a/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entity-action.ts b/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entity-action.ts
index 12123beae1c..1968d38bd18 100644
--- a/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entity-action.ts
+++ b/apps/hash-ai-worker-ts/src/activities/flow-activities/persist-entity-action.ts
@@ -185,21 +185,26 @@ export const persistEntityAction: FlowActionActivity = async ({ inputs }) => {
         });
 
         /**
-         * In practice we don't reassign existingEntity anywhere below it doesn't harm to make sure it will always
+         * In practice we don't reassign matchedEntityUpdate anywhere below it doesn't harm to make sure it will always
          * be the same thing in the backOff function.
          */
-        const stableReferenceToExistingEntity =
-          matchedEntityUpdate.existingEntity;
+        const stableReferenceToMatchedEntity = matchedEntityUpdate;
 
         entity = await backOff(
           () =>
-            stableReferenceToExistingEntity.patch(
+            stableReferenceToMatchedEntity.existingEntity.patch(
               graphApiClient,
               { actorId: webBotActorId },
               {
-                ...entityValues,
+                entityTypeIds:
+                  stableReferenceToMatchedEntity.newValues.entityTypeIds,
                 draft: existingEntityIsDraft ? true : createEditionAsDraft,
                 propertyPatches: patchOperations,
+                provenance: {
+                  ...entityValues.provenance,
+                  sources:
+                    stableReferenceToMatchedEntity.newValues.editionSources,
+                },
               },
             ),
           {
diff --git a/apps/hash-ai-worker-ts/src/activities/shared/find-existing-entity.ts b/apps/hash-ai-worker-ts/src/activities/shared/find-existing-entity.ts
index 83645c89449..359744b389b 100644
--- a/apps/hash-ai-worker-ts/src/activities/shared/find-existing-entity.ts
+++ b/apps/hash-ai-worker-ts/src/activities/shared/find-existing-entity.ts
@@ -217,14 +217,13 @@ export const findExistingEntity = async ({
             },
           ],
         },
-        limit: 3,
         temporalAxes: currentTimeInstantTemporalAxes,
         includeDrafts,
       })
       .then(({ data: response }) =>
-        response.entities.map((entity) =>
-          mapGraphApiEntityToEntity(entity, actorId),
-        ),
+        response.entities
+          .slice(0, 3)
+          .map((entity) => mapGraphApiEntityToEntity(entity, actorId)),
       );
   }
 
@@ -253,14 +252,13 @@ export const findExistingEntity = async ({
               },
             ],
           },
-          limit: 3,
           temporalAxes: currentTimeInstantTemporalAxes,
           includeDrafts,
         })
         .then(({ data: response }) =>
-          response.entities.map((entity) =>
-            mapGraphApiEntityToEntity(entity, actorId),
-          ),
+          response.entities
+            .slice(0, 3)
+            .map((entity) => mapGraphApiEntityToEntity(entity, actorId)),
         );
     }
   }
@@ -309,7 +307,10 @@ export const findExistingLinkEntity = async ({
           { equal: [{ path: ["archived"] }, { parameter: false }] },
           {
             any: proposedEntity.entityTypeIds.map((entityTypeId) => ({
-              equal: [{ path: ["versionedUrl"] }, { parameter: entityTypeId }],
+              equal: [
+                { path: ["type", "versionedUrl"] },
+                { parameter: entityTypeId },
+              ],
             })),
           },
           {