diff --git a/internal/cloud/code-agent-agentrun-adapter.ts b/internal/cloud/code-agent-agentrun-adapter.ts
index 7480043f..52095d89 100644
--- a/internal/cloud/code-agent-agentrun-adapter.ts
+++ b/internal/cloud/code-agent-agentrun-adapter.ts
@@ -759,7 +759,7 @@ export async function steerAgentRunChatTurn({ traceId, currentResult = null, par
 export async function loadPersistedAgentRunResult(traceId, options = {}) {
   const safeId = safeTraceId(traceId);
   if (!safeId || typeof options.accessController?.getAgentSessionByTraceId !== "function") return null;
-  const session = await options.accessController.getAgentSessionByTraceId(safeId);
+  const session = await loadAgentSessionByTraceId(safeId, options);
   const agentRun = agentRunSeedFromSession(session, safeId);
   if (!agentRun?.runId) return null;
   const backendProfile = firstNonEmpty(agentRun.backendProfile, "deepseek");
@@ -792,6 +792,19 @@ export async function loadPersistedAgentRunResult(traceId, options = {}) {
   };
 }
 
+async function loadAgentSessionByTraceId(traceId, options = {}) {
+  const safeId = safeTraceId(traceId);
+  if (!safeId || typeof options.accessController?.getAgentSessionByTraceId !== "function") return null;
+  const cache = options.codeAgentTraceSessionCache;
+  if (cache instanceof Map) {
+    if (cache.has(safeId)) return cache.get(safeId);
+    const session = await options.accessController.getAgentSessionByTraceId(safeId);
+    cache.set(safeId, session ?? null);
+    return session ?? null;
+  }
+  return await options.accessController.getAgentSessionByTraceId(safeId);
+}
+
 function agentRunSeedFromSession(session, traceId) {
   const snapshot = session?.session && typeof session.session === "object" ? session.session : null;
   const traceResults = snapshot?.traceResults && typeof snapshot.traceResults === "object" ? snapshot.traceResults : null;
diff --git a/internal/cloud/server-agent-chat.test.ts b/internal/cloud/server-agent-chat.test.ts
index d5627010..52e1c875 100644
--- a/internal/cloud/server-agent-chat.test.ts
+++ b/internal/cloud/server-agent-chat.test.ts
@@ -2303,6 +2303,99 @@ test("cloud api turn status reuses AgentRun result-sync trace refresh (#1422)",
   }
 });
 
+test("cloud api turn status reuses request session lookup for project check and persisted AgentRun result (#1422)", async () => {
+  const calls = [];
+  const traceId = "trc_issue1422_turn_status_session_cache";
+  const runId = "run_issue1422_turn_status_session_cache";
+  const commandId = "cmd_issue1422_turn_status_session_cache";
+  const agentRunServer = createHttpServer(async (request, response) => {
+    const url = new URL(request.url || "/", "http://127.0.0.1");
+    calls.push({ method: request.method, path: url.pathname, search: url.search });
+    const send = (data) => {
+      response.writeHead(200, { "content-type": "application/json" });
+      response.end(`${JSON.stringify({ ok: true, data, traceId: "trc_fake_issue1422_session_cache" })}\n`);
+    };
+    if (request.method === "GET" && url.pathname === `/api/v1/runs/${runId}/events`) {
+      return send({ items: [
+        { id: "evt_issue1422_session_cache_running", runId, seq: 1, type: "backend_status", payload: { phase: "runner-job-created", commandId }, createdAt: "2026-06-18T05:20:00.000Z" }
+      ] });
+    }
+    response.writeHead(404, { "content-type": "application/json" });
+    response.end(`${JSON.stringify({ ok: false, message: `unexpected ${request.method} ${url.pathname}` })}\n`);
+  });
+  await new Promise((resolve) => agentRunServer.listen(0, "127.0.0.1", resolve));
+
+  const agentRunPort = agentRunServer.address().port;
+  let sessionLookupCount = 0;
+  const session = testAgentSessionRecord({
+    sessionId: "ses_issue1422_turn_status_session_cache",
+    projectId: "prj_hwpod_workbench",
+    conversationId: "cnv_issue1422_turn_status_session_cache",
+    threadId: "thread-issue1422-turn-status-session-cache",
+    lastTraceId: traceId,
+    status: "running",
+    session: {
+      agentRun: {
+        adapter: "agentrun-v01",
+        managerUrl: `http://127.0.0.1:${agentRunPort}`,
+        runId,
+        commandId,
+        traceId,
+        providerTrace: { traceId, valuesPrinted: false },
+        lastSeq: 0,
+        status: "running",
+        commandState: "running",
+        backendProfile: "deepseek",
+        valuesPrinted: false
+      },
+      valuesRedacted: true
+    }
+  });
+  const server = createCloudApiServer({
+    traceStore: createCodeAgentTraceStore(),
+    codeAgentChatResults: new Map(),
+    env: {
+      HWLAB_CODE_AGENT_ADAPTER: "agentrun-v01",
+      AGENTRUN_MGR_URL: `http://127.0.0.1:${agentRunPort}`,
+      HWLAB_CODE_AGENT_AGENTRUN_ALLOW_NON_K3S_URL: "1",
+      HWLAB_CODE_AGENT_AGENTRUN_PROVIDER_ID: "D601",
+      HWLAB_ENVIRONMENT: "v02",
+      HWLAB_GITOPS_PROFILE: "v02"
+    },
+    accessController: {
+      required: false,
+      async authenticate() {
+        return { ok: true, actor: TEST_AGENT_ACTOR, session: TEST_AUTH_SESSION };
+      },
+      async getAgentSessionByTraceId(requestTraceId) {
+        sessionLookupCount += 1;
+        return requestTraceId === traceId ? session : null;
+      }
+    }
+  });
+  await new Promise((resolve) => server.listen(0, "127.0.0.1", resolve));
+
+  try {
+    const { port } = server.address();
+    const response = await fetch(`http://127.0.0.1:${port}/v1/agent/turns/${traceId}?projectId=prj_hwpod_workbench`, {
+      headers: { cookie: "hwlab_session=test-stub-session" }
+    });
+    assert.equal(response.status, 200);
+    const body = await response.json();
+    assert.equal(body.status, "running");
+    assert.equal(body.sessionId, "ses_issue1422_turn_status_session_cache");
+    assert.equal(sessionLookupCount, 1);
+    assert.equal(calls.filter((call) => call.path === `/api/v1/runs/${runId}/events`).length, 1);
+  } finally {
+    await new Promise((resolve, reject) => {
+      server.close((error) => (error ? reject(error) : resolve()));
+    });
+    await new Promise((resolve, reject) => {
+      agentRunServer.close((error) => (error ? reject(error) : resolve()));
+    });
+  }
+});
+
 test("cloud api turn status skips AgentRun refresh for complete terminal evidence (#1422)", async () => {
   const calls = [];
   const traceId = "trc_issue1422_terminal_fast_path";
diff --git a/internal/cloud/server-code-agent-http.ts b/internal/cloud/server-code-agent-http.ts
index 4e0c6f17..54edfa79 100644
--- a/internal/cloud/server-code-agent-http.ts
+++ b/internal/cloud/server-code-agent-http.ts
@@ -1143,12 +1143,13 @@ export async function handleCodeAgentTurnHttp(request, response, url, options) {
     });
     return;
   }
-  const projectMismatch = await traceProjectMismatchSnapshot(traceId, url, options, "turn");
+  const requestOptions = codeAgentRequestScopedOptions(options);
+  const projectMismatch = await traceProjectMismatchSnapshot(traceId, url, requestOptions, "turn");
   if (projectMismatch) {
     sendJson(response, projectMismatch.statusCode, projectMismatch.body);
     return;
   }
-  const resolved = await resolveCodeAgentTurnStatusSnapshot(traceId, options);
+  const resolved = await resolveCodeAgentTurnStatusSnapshot(traceId, requestOptions);
   sendJson(response, resolved.statusCode, resolved.body);
 }
 
@@ -1237,6 +1238,13 @@ function codeAgentTurnStatusRefreshOptions(options = {}) {
   };
 }
 
+function codeAgentRequestScopedOptions(options = {}) {
+  return {
+    ...options,
+    codeAgentTraceSessionCache: options.codeAgentTraceSessionCache instanceof Map ? options.codeAgentTraceSessionCache : new Map()
+  };
+}
+
 function forbiddenTurnSnapshot(traceId) {
   return {
     statusCode: 403,
@@ -1257,7 +1265,7 @@ function forbiddenTurnSnapshot(traceId) {
 async function traceProjectMismatchSnapshot(traceId, url, options, resourceKind) {
   const requestedProjectId = textValue(url.searchParams.get("projectId"));
   if (!requestedProjectId || !options.accessController?.getAgentSessionByTraceId) return null;
-  const session = await options.accessController.getAgentSessionByTraceId(traceId);
+  const session = await getCodeAgentSessionByTraceId(traceId, options);
   if (!session) return null;
   if (session.ownerUserId && options.actor?.role !== "admin" && session.ownerUserId !== options.actor?.id) return forbiddenTurnSnapshot(traceId);
   const actualProjectId = textValue(session.projectId);
@@ -1278,6 +1286,19 @@ async function traceProjectMismatchSnapshot(traceId, url, options, resourceKind)
   };
 }
 
+async function getCodeAgentSessionByTraceId(traceId, options = {}) {
+  const safeId = safeTraceId(traceId);
+  if (!safeId || typeof options.accessController?.getAgentSessionByTraceId !== "function") return null;
+  const cache = options.codeAgentTraceSessionCache;
+  if (cache instanceof Map) {
+    if (cache.has(safeId)) return cache.get(safeId);
+    const session = await options.accessController.getAgentSessionByTraceId(safeId);
+    cache.set(safeId, session ?? null);
+    return session ?? null;
+  }
+  return await options.accessController.getAgentSessionByTraceId(safeId);
+}
+
 function codeAgentTurnStatusPayload({ traceId, result, snapshot, resultPollError, refreshError, options }) {
   const resultObject = result && typeof result === "object" ? result : null;
   const snapshotObject = snapshot && typeof snapshot === "object" ? snapshot : null;
@@ -2502,13 +2523,14 @@ export async function handleCodeAgentTraceHttp(request, response, url, options)
     });
     return;
   }
-  const projectMismatch = await traceProjectMismatchSnapshot(traceId, url, options, "trace");
+  const requestOptions = codeAgentRequestScopedOptions(options);
+  const projectMismatch = await traceProjectMismatchSnapshot(traceId, url, requestOptions, "trace");
   if (projectMismatch) {
     sendJson(response, projectMismatch.statusCode, projectMismatch.body);
     return;
   }
-  const result = options.codeAgentChatResults?.get(traceId) ?? null;
-  if (result && !canAccessOwnedResult(result, options.actor)) {
+  const result = requestOptions.codeAgentChatResults?.get(traceId) ?? null;
+  if (result && !canAccessOwnedResult(result, requestOptions.actor)) {
     sendJson(response, 403, {
       error: {
         code: "agent_session_owner_required",
@@ -2518,9 +2540,9 @@ export async function handleCodeAgentTraceHttp(request, response, url, options)
     return;
   }
 
-  let agentRunResult = result?.agentRun ? result : await loadPersistedAgentRunResult(traceId, options);
+  let agentRunResult = result?.agentRun ? result : await loadPersistedAgentRunResult(traceId, requestOptions);
   let refreshError = null;
-  if (agentRunResult && !canAccessOwnedResult(agentRunResult, options.actor)) {
+  if (agentRunResult && !canAccessOwnedResult(agentRunResult, requestOptions.actor)) {
     sendJson(response, 403, {
       error: {
         code: "agent_session_owner_required",
@@ -2531,16 +2553,16 @@ export async function handleCodeAgentTraceHttp(request, response, url, options)
   }
   if (agentRunResult?.agentRun) {
     try {
-      const snapshot = await refreshAgentRunTrace({ traceId, result: agentRunResult, options, traceStore });
-      agentRunResult = options.codeAgentChatResults?.get?.(traceId) ?? agentRunResult;
+      const snapshot = await refreshAgentRunTrace({ traceId, result: agentRunResult, options: requestOptions, traceStore });
+      agentRunResult = requestOptions.codeAgentChatResults?.get?.(traceId) ?? agentRunResult;
       if (traceNeedsCommandResultSync(agentRunResult, snapshot)) {
-        const synced = await syncAgentRunChatResult({ traceId, currentResult: agentRunResult, options, traceStore, appendResultEvent: false, refreshEvents: false, forceResultSync: true });
+        const synced = await syncAgentRunChatResult({ traceId, currentResult: agentRunResult, options: requestOptions, traceStore, appendResultEvent: false, refreshEvents: false, forceResultSync: true });
         agentRunResult = synced.result ?? agentRunResult;
       }
       if (isTraceCommandTerminalStatus(agentRunResult?.status)) {
-        await finalizeCodeAgentBillingUsage({ payload: agentRunResult, params: agentRunResult, options });
-        recordCodeAgentConversationFact(agentRunResult, options);
-        await recordCodeAgentSessionOwner({ payload: agentRunResult, params: agentRunResult, options, status: codeAgentOwnerStatusForResult(agentRunResult), preserveLastTraceId: true });
+        await finalizeCodeAgentBillingUsage({ payload: agentRunResult, params: agentRunResult, options: requestOptions });
+        recordCodeAgentConversationFact(agentRunResult, requestOptions);
+        await recordCodeAgentSessionOwner({ payload: agentRunResult, params: agentRunResult, options: requestOptions, status: codeAgentOwnerStatusForResult(agentRunResult), preserveLastTraceId: true });
       }
     } catch (error) {
       refreshError = error;
@@ -2548,7 +2570,7 @@ export async function handleCodeAgentTraceHttp(request, response, url, options)
   }
 
   if (streamSegment === "stream") {
-    sendTraceSse(response, traceStore, traceId, options);
+    sendTraceSse(response, traceStore, traceId, requestOptions);
     return;
   }