diff --git a/internal/cloud/code-agent-agentrun-adapter.ts b/internal/cloud/code-agent-agentrun-adapter.ts
index 2e9fe700..4f6e9c08 100644
--- a/internal/cloud/code-agent-agentrun-adapter.ts
+++ b/internal/cloud/code-agent-agentrun-adapter.ts
@@ -1071,6 +1071,11 @@ function rejectRemovedResourceWorkspaceFiles(value) {
   throw adapterError("legacy_workspace_files_removed", "workspaceFiles/resourceWorkspaceFiles are removed; use AgentRun ResourceBundleRef kind=gitbundle with bundles[]");
 }
 
+function validIsoTimestamp(value) {
+  const timestamp = firstNonEmpty(value);
+  return timestamp && Number.isFinite(Date.parse(timestamp)) ? new Date(Date.parse(timestamp)).toISOString() : null;
+}
+
 function adapterError(code, message, details = {}) {
   return Object.assign(new Error(message), {
     code,
@@ -1092,6 +1097,7 @@ function buildAgentRunCommandInput({ params, traceId, backendProfile, sessionId,
       ...(promptEvidence?.prompt ? { promptMetadata: promptEvidence.prompt } : {}),
       traceId,
       userMessageId: agentRunUserMessageId(params, traceId),
+      submittedAt: validIsoTimestamp(params.submittedAt),
       projectId: firstNonEmpty(params.projectId) || null,
       conversationId: safeConversationId(params.conversationId) || null,
       sessionId: sessionId ?? scopedAgentRunSessionIdForParams(params, traceId),
@@ -1121,6 +1127,7 @@ function buildAgentRunSteerCommandInput({ params, traceId, steerTraceId, mapped
       ...(promptEvidence?.prompt ? { promptMetadata: promptEvidence.prompt } : {}),
       traceId: steerTraceId,
       userMessageId: agentRunUserMessageId(params, steerTraceId),
+      submittedAt: validIsoTimestamp(params.submittedAt),
       targetTraceId: traceId,
       targetCommandId: mapped.agentRun.commandId,
       conversationId: safeConversationId(mapped.conversationId ?? params.conversationId) || null,
diff --git a/internal/cloud/kafka-event-bridge.test.ts b/internal/cloud/kafka-event-bridge.test.ts
index 8fe4de74..e11be694 100644
--- a/internal/cloud/kafka-event-bridge.test.ts
+++ b/internal/cloud/kafka-event-bridge.test.ts
@@ -168,6 +168,10 @@ test("projects only explicit AgentRun lifecycle timestamps", () => {
   }, { source: "hwlab-test" });
   assert.equal(withoutFacts.event.startedAt, null);
   assert.equal(withoutFacts.event.finishedAt, null);
+  assert.equal(withoutFacts.event.createdAt, "2026-07-09T10:00:05.000Z");
+  assert.equal(withoutFacts.event.submittedAt, null);
+  assert.equal(withoutFacts.event.timingClock, "event-created-at-fallback");
+  assert.equal(withoutFacts.event.blocking, false);
 });
 
 test("projects AgentRun assistant_message Kafka event into HWLAB trace event", () => {
@@ -336,6 +340,7 @@ test("projects AgentRun user_message into a stable HWLAB user event", () => {
         traceId: "trc_user_message",
         targetTraceId: "trc_user_message_target",
         userMessageId: "msg_user_message_user",
+        submittedAt: "2026-07-10T09:59:55.000Z",
         text: "replay this input",
         source: "agentrun-turn-command-payload",
         valuesPrinted: false
@@ -352,6 +357,10 @@ test("projects AgentRun user_message into a stable HWLAB user event", () => {
   assert.equal(projected.event.userMessageId, "msg_user_message_user");
   assert.equal(projected.event.messageId, "msg_user_message_user");
   assert.equal(projected.event.targetTraceId, "trc_user_message_target");
+  assert.equal(projected.event.createdAt, "2026-07-10T09:59:55.000Z");
+  assert.equal(projected.event.submittedAt, "2026-07-10T09:59:55.000Z");
+  assert.equal(projected.event.timingClock, "user-submitted-at");
+  assert.equal(projected.event.blocking, false);
   assert.equal(projected.event.text, "replay this input");
   assert.equal(projected.event.sourceEventId, "evt_user_message");
   assert.equal(projected.sourceEvent.partition, 1);
diff --git a/internal/cloud/kafka-event-bridge.ts b/internal/cloud/kafka-event-bridge.ts
index b358f711..f9ee3a1c 100644
--- a/internal/cloud/kafka-event-bridge.ts
+++ b/internal/cloud/kafka-event-bridge.ts
@@ -1516,8 +1516,10 @@ function mapAgentRunSourceEventToHwlabEvent({ input, sourceEvent, payload, run,
   if (type === "user_message") {
     const userMessageId = firstText(payload.userMessageId);
     const userText = textPayload(payload, "user message");
+    const submittedAt = timestampValue(payload.submittedAt);
     return {
       ...base,
+      createdAt: submittedAt || base.createdAt,
       type: "user",
       eventType: "user",
       status: "sent",
@@ -1529,6 +1531,9 @@ function mapAgentRunSourceEventToHwlabEvent({ input, sourceEvent, payload, run,
       userMessageId,
       targetTraceId: firstText(payload.targetTraceId),
       userSource: firstText(payload.source),
+      submittedAt,
+      timingClock: submittedAt ? "user-submitted-at" : "event-created-at-fallback",
+      blocking: false,
       terminal: false
     };
   }
diff --git a/internal/workbench/native-agentrun-application.test.ts b/internal/workbench/native-agentrun-application.test.ts
index 4be12351..65754eaf 100644
--- a/internal/workbench/native-agentrun-application.test.ts
+++ b/internal/workbench/native-agentrun-application.test.ts
@@ -21,6 +21,7 @@ test("L1 AgentRun application dispatches gpt.pika without polling or projecting
     stateFile,
     env: agentRunEnvironment(),
     fetchImpl: fakeAgentRunManager(calls),
+    now: () => "2026-07-20T01:13:12.232Z",
   });
 
   const created = await app.createSession({ actor: { id: "usr_native", role: "user" }, params: { providerProfile: "gpt.pika" } });
@@ -29,7 +30,7 @@ test("L1 AgentRun application dispatches gpt.pika without polling or projecting
     actor: { id: "usr_native", role: "user" },
     traceId: "trc_l1_gpt_pika_smoke",
     sessionId: session.sessionId,
-    params: { message: "hi", providerProfile: "gpt.pika" },
+    params: { message: "hi", submittedAt: "2026-07-20T01:13:07.699Z", providerProfile: "gpt.pika" },
   };
   const admitted = await app.admitTurn(input);
   const result = await app.dispatchTurn(admitted);
@@ -48,6 +49,7 @@ test("L1 AgentRun application dispatches gpt.pika without polling or projecting
   const state = JSON.parse(await readFile(stateFile, "utf8"));
   expect(state.turns[input.traceId]).toMatchObject({
     status: "running",
+    createdAt: "2026-07-20T01:13:07.699Z",
     terminal: false,
     runId: "run_l1_gpt_pika",
     commandId: "cmd_l1_gpt_pika",
@@ -94,6 +96,9 @@ function agentRunEnvironment(): Record<string, string> {
     AGENTRUN_API_KEY: "test-agentrun-key",
     HWLAB_CODE_AGENT_AGENTRUN_ALLOW_NON_K3S_URL: "1",
     HWLAB_CODE_AGENT_AGENTRUN_PROVIDER_ID: "NC01",
+    HWLAB_CODE_AGENT_AGENTRUN_GPT_PIKA_SECRET_NAME: "provider-gpt-pika",
+    HWLAB_CODE_AGENT_AGENTRUN_GITHUB_TOOL_SECRET_NAME: "agentrun-test-tool-github-pr",
+    HWLAB_CODE_AGENT_AGENTRUN_UNIDESK_SSH_TOOL_SECRET_NAME: "agentrun-test-tool-unidesk-ssh",
     HWLAB_CODE_AGENT_AGENTRUN_SOURCE_COMMIT: "0123456789abcdef0123456789abcdef01234567",
     HWLAB_CODE_AGENT_AGENTRUN_REPO_URL: "http://git-mirror-http.devops-infra.svc.cluster.local/pikasTech/HWLAB.git",
     HWLAB_CODE_AGENT_DEFAULT_PROVIDER_PROFILE: "gpt.pika",
@@ -126,6 +131,7 @@ function fakeAgentRunManager(calls: Array<{ method: string; path: string; author
     }
     if (method === "POST" && url.pathname === "/api/v1/runs/run_l1_gpt_pika/commands") {
       expect(body.payload.prompt).toBe("hi");
+      expect(body.payload.submittedAt).toBe("2026-07-20T01:13:07.699Z");
       return send({
         id: "cmd_l1_gpt_pika",
         runId: "run_l1_gpt_pika",
diff --git a/internal/workbench/native-agentrun-application.ts b/internal/workbench/native-agentrun-application.ts
index 997541ce..49e6cd79 100644
--- a/internal/workbench/native-agentrun-application.ts
+++ b/internal/workbench/native-agentrun-application.ts
@@ -76,7 +76,7 @@ export function createNativeAgentRunWorkbenchApplication(options: {
     async admitTurn(input) {
       return mutate((state) => {
         const session = ownedSession(state, input.sessionId, input.actor.id);
-        const timestamp = now();
+        const timestamp = validTimestamp(input.params.submittedAt) ?? now();
         const message = requiredText(input.params.message, "message");
         state.turns[input.traceId] = {
           traceId: input.traceId,
@@ -93,7 +93,7 @@ export function createNativeAgentRunWorkbenchApplication(options: {
         session.status = "running";
         session.lastTraceId = input.traceId;
         session.updatedAt = timestamp;
-        return { ...input, params: { ...input.params, message, providerProfile: text(input.params.providerProfile) || session.providerProfile } };
+        return { ...input, params: { ...input.params, message, submittedAt: timestamp, providerProfile: text(input.params.providerProfile) || session.providerProfile } };
       });
     },
     async dispatchTurn(input: WorkbenchTurnInput) {
@@ -163,6 +163,7 @@ async function load(stateFile: string): Promise<NativeState> {
 }
 function object(value: unknown) { return value && typeof value === "object" && !Array.isArray(value) ? value as Record<string, Record<string, any>> : {}; }
 function text(value: unknown) { return String(value ?? "").trim(); }
+function validTimestamp(value: unknown) { const timestamp = text(value); return timestamp && Number.isFinite(Date.parse(timestamp)) ? new Date(Date.parse(timestamp)).toISOString() : null; }
 function requiredText(value: unknown, field: string) { const result = text(value); if (!result) throw codedError("invalid_input", `${field} is required`); return result; }
 function validOptionalId(value: unknown, prefix: string) { const id = text(value); if (!id) return null; if (!id.startsWith(prefix)) throw codedError("invalid_input", `${prefix.slice(0, -1)} id is invalid`); return id; }
 function ownedSession(state: NativeState, sessionId: string, ownerUserId: string) { const session = state.sessions[sessionId]; if (!session || session.ownerUserId !== ownerUserId) throw codedError("session_not_found", "session is not visible to the actor"); return session; }
diff --git a/web/hwlab-cloud-web/src/stores/workbench.ts b/web/hwlab-cloud-web/src/stores/workbench.ts
index b0c3a713..80b03b2a 100644
--- a/web/hwlab-cloud-web/src/stores/workbench.ts
+++ b/web/hwlab-cloud-web/src/stores/workbench.ts
@@ -545,7 +545,7 @@ export const useWorkbenchStore = defineStore("workbench", () => {
     chatPending.value = true;
     rememberRecentDraft(value);
     recordActivity("submit");
-    const payload = { message: value, prompt: value, sessionId, threadId: providerThreadId, traceId, userMessageId, providerProfile: providerProfile.value, gatewayShellTimeoutMs: gatewayShellTimeoutMs.value, targetTraceId: composer.value.targetTraceId, steerTraceId };
+    const payload = { message: value, prompt: value, submittedAt, sessionId, threadId: providerThreadId, traceId, userMessageId, providerProfile: providerProfile.value, gatewayShellTimeoutMs: gatewayShellTimeoutMs.value, targetTraceId: composer.value.targetTraceId, steerTraceId };
     const response = steerMode
       ? await workbenchColadaMutations.steerAgentMessage({ payload, timeoutMs: codeAgentTimeoutMs.value, activityRef: () => activityRef.value, sessionId, traceId })
       : await workbenchColadaMutations.submitAgentMessage({ payload, timeoutMs: codeAgentTimeoutMs.value, activityRef: () => activityRef.value, sessionId, traceId });