diff --git a/src/gateway/server-methods/agent.test.ts b/src/gateway/server-methods/agent.test.ts
index f29a9a4c85d..411933ec0aa 100644
--- a/src/gateway/server-methods/agent.test.ts
+++ b/src/gateway/server-methods/agent.test.ts
@@ -435,6 +435,57 @@ describe("gateway agent handler", () => {
     );
   });
 
+  it("re-establishes plugin runtime gateway scope for detached agent runs", async () => {
+    primeMainAgentRun();
+    const context = makeContext();
+    const client = {
+      connect: {
+        scopes: ["operator.write"],
+      },
+    } as AgentHandlerArgs["client"];
+    const isWebchatConnect = vi.fn(() => true);
+    let observedScope:
+      | {
+          context?: GatewayRequestContext;
+          client?: AgentHandlerArgs["client"];
+          isWebchatConnect?: AgentHandlerArgs["isWebchatConnect"];
+        }
+      | undefined;
+
+    mocks.agentCommand.mockImplementation(async () => {
+      const gatewayScopeModule = await import("../../plugins/runtime/gateway-request-scope.js");
+      observedScope = gatewayScopeModule.getPluginRuntimeGatewayRequestScope();
+      return {
+        payloads: [{ text: "ok" }],
+        meta: { durationMs: 100 },
+      };
+    });
+
+    await invokeAgent(
+      {
+        message: "test",
+        agentId: "main",
+        sessionKey: "agent:main:main",
+        idempotencyKey: "test-idem-plugin-scope",
+      },
+      {
+        reqId: "test-idem-plugin-scope",
+        context,
+        client,
+        isWebchatConnect,
+      },
+    );
+
+    await vi.waitFor(() => expect(observedScope).toBeDefined());
+    expect(observedScope).toEqual(
+      expect.objectContaining({
+        context,
+        client,
+        isWebchatConnect,
+      }),
+    );
+  });
+
   it("preserves cliSessionIds from existing session entry", async () => {
     const existingCliSessionIds = { "claude-cli": "abc-123-def" };
     const existingClaudeCliSessionId = "abc-123-def";
diff --git a/src/gateway/server-methods/agent.ts b/src/gateway/server-methods/agent.ts
index bd5637fa78f..85d2223ebf1 100644
--- a/src/gateway/server-methods/agent.ts
+++ b/src/gateway/server-methods/agent.ts
@@ -22,6 +22,7 @@ import {
   resolveAgentOutboundTarget,
 } from "../../infra/outbound/agent-delivery.js";
 import { resolveMessageChannelSelection } from "../../infra/outbound/channel-selection.js";
+import { withPluginRuntimeGatewayRequestScope } from "../../plugins/runtime/gateway-request-scope.js";
 import { classifySessionKeyShape, normalizeAgentId } from "../../routing/session-key.js";
 import { defaultRuntime } from "../../runtime.js";
 import { normalizeInputProvenance, type InputProvenance } from "../../sessions/input-provenance.js";
@@ -144,8 +145,17 @@ function dispatchAgentRunFromGateway(params: {
   idempotencyKey: string;
   respond: GatewayRequestHandlerOptions["respond"];
   context: GatewayRequestHandlerOptions["context"];
+  client: GatewayRequestHandlerOptions["client"];
+  isWebchatConnect: GatewayRequestHandlerOptions["isWebchatConnect"];
 }) {
-  void agentCommandFromIngress(params.ingressOpts, defaultRuntime, params.context.deps)
+  void withPluginRuntimeGatewayRequestScope(
+    {
+      context: params.context,
+      client: params.client,
+      isWebchatConnect: params.isWebchatConnect,
+    },
+    () => agentCommandFromIngress(params.ingressOpts, defaultRuntime, params.context.deps),
+  )
     .then((result) => {
       const payload = {
         runId: params.runId,
@@ -711,6 +721,8 @@ export const agentHandlers: GatewayRequestHandlers = {
       idempotencyKey: idem,
       respond,
       context,
+      client,
+      isWebchatConnect,
     });
   },
   "agent.identity.get": ({ params, respond }) => {