diff --git a/src/agents/pi-embedded-runner-extraparams.e2e.test.ts b/src/agents/pi-embedded-runner-extraparams.e2e.test.ts
index 2053a87d668..f2f6af57d20 100644
--- a/src/agents/pi-embedded-runner-extraparams.e2e.test.ts
+++ b/src/agents/pi-embedded-runner-extraparams.e2e.test.ts
@@ -91,4 +91,50 @@ describe("applyExtraParamsToAgent", () => {
       "X-Custom": "1",
     });
   });
+
+  it("forces store=true for direct OpenAI Responses payloads", () => {
+    const payload = { store: false };
+    const baseStreamFn: StreamFn = (_model, _context, options) => {
+      options?.onPayload?.(payload);
+      return new AssistantMessageEventStream();
+    };
+    const agent = { streamFn: baseStreamFn };
+
+    applyExtraParamsToAgent(agent, undefined, "openai", "gpt-5");
+
+    const model = {
+      api: "openai-responses",
+      provider: "openai",
+      id: "gpt-5",
+      baseUrl: "https://api.openai.com/v1",
+    } as Model<"openai-responses">;
+    const context: Context = { messages: [] };
+
+    void agent.streamFn?.(model, context, {});
+
+    expect(payload.store).toBe(true);
+  });
+
+  it("does not force store for OpenAI Responses routed through non-OpenAI base URLs", () => {
+    const payload = { store: false };
+    const baseStreamFn: StreamFn = (_model, _context, options) => {
+      options?.onPayload?.(payload);
+      return new AssistantMessageEventStream();
+    };
+    const agent = { streamFn: baseStreamFn };
+
+    applyExtraParamsToAgent(agent, undefined, "openai", "gpt-5");
+
+    const model = {
+      api: "openai-responses",
+      provider: "openai",
+      id: "gpt-5",
+      baseUrl: "https://proxy.example.com/v1",
+    } as Model<"openai-responses">;
+    const context: Context = { messages: [] };
+
+    void agent.streamFn?.(model, context, {});
+
+    expect(payload.store).toBe(false);
+  });
 });
diff --git a/src/agents/pi-embedded-runner/extra-params.ts b/src/agents/pi-embedded-runner/extra-params.ts
index fdfbaa47c21..61734cd0bad 100644
--- a/src/agents/pi-embedded-runner/extra-params.ts
+++ b/src/agents/pi-embedded-runner/extra-params.ts
@@ -8,6 +8,8 @@ const OPENROUTER_APP_HEADERS: Record<string, string> = {
   "HTTP-Referer": "https://openclaw.ai",
   "X-Title": "OpenClaw",
 };
+const OPENAI_RESPONSES_APIS = new Set(["openai-responses", "openai-codex-responses"]);
+const OPENAI_RESPONSES_PROVIDERS = new Set(["openai", "openai-codex"]);
 
 /**
  * Resolve provider-specific extra params from model config.
@@ -101,6 +103,57 @@ function createStreamFnWithExtraParams(
   return wrappedStreamFn;
 }
 
+function isDirectOpenAIBaseUrl(baseUrl: unknown): boolean {
+  if (typeof baseUrl !== "string" || !baseUrl.trim()) {
+    return true;
+  }
+
+  try {
+    const host = new URL(baseUrl).hostname.toLowerCase();
+    return host === "api.openai.com" || host === "chatgpt.com";
+  } catch {
+    const normalized = baseUrl.toLowerCase();
+    return normalized.includes("api.openai.com") || normalized.includes("chatgpt.com");
+  }
+}
+
+function shouldForceResponsesStore(model: {
+  api?: unknown;
+  provider?: unknown;
+  baseUrl?: unknown;
+}): boolean {
+  if (typeof model.api !== "string" || typeof model.provider !== "string") {
+    return false;
+  }
+  if (!OPENAI_RESPONSES_APIS.has(model.api)) {
+    return false;
+  }
+  if (!OPENAI_RESPONSES_PROVIDERS.has(model.provider)) {
+    return false;
+  }
+  return isDirectOpenAIBaseUrl(model.baseUrl);
+}
+
+function createOpenAIResponsesStoreWrapper(baseStreamFn: StreamFn | undefined): StreamFn {
+  const underlying = baseStreamFn ?? streamSimple;
+  return (model, context, options) => {
+    if (!shouldForceResponsesStore(model)) {
+      return underlying(model, context, options);
+    }
+
+    const originalOnPayload = options?.onPayload;
+    return underlying(model, context, {
+      ...options,
+      onPayload: (payload) => {
+        if (payload && typeof payload === "object") {
+          (payload as { store?: unknown }).store = true;
+        }
+        originalOnPayload?.(payload);
+      },
+    });
+  };
+}
+
 /**
  * Create a streamFn wrapper that adds OpenRouter app attribution headers.
  * These headers allow OpenClaw to appear on OpenRouter's leaderboard.
@@ -153,4 +206,9 @@ export function applyExtraParamsToAgent(
     log.debug(`applying OpenRouter app attribution headers for ${provider}/${modelId}`);
     agent.streamFn = createOpenRouterHeadersWrapper(agent.streamFn);
   }
+
+  // Work around upstream pi-ai hardcoding `store: false` for Responses API.
+  // Force `store=true` for direct OpenAI/OpenAI Codex providers so multi-turn
+  // server-side conversation state is preserved.
+  agent.streamFn = createOpenAIResponsesStoreWrapper(agent.streamFn);
 }