fix: preserve nested proxy handles

src/infra/net/proxy/active-proxy-state.ts

@@ -6,16 +6,23 @@ export type ActiveManagedProxyRegistration = {
 };
 
 let activeProxyUrl: ActiveManagedProxyUrl | undefined;
+let activeProxyRegistrationCount = 0;
 
 export function registerActiveManagedProxyUrl(proxyUrl: URL): ActiveManagedProxyRegistration {
+  const normalizedProxyUrl = new URL(proxyUrl.href);
   if (activeProxyUrl !== undefined) {
-    throw new Error(
-      "proxy: cannot activate a managed proxy while another proxy is active; " +
-        "stop the current proxy before changing proxy.proxyUrl.",
-    );
+    if (activeProxyUrl.href !== normalizedProxyUrl.href) {
+      throw new Error(
+        "proxy: cannot activate a managed proxy while another proxy is active; " +
+          "stop the current proxy before changing proxy.proxyUrl.",
+      );
+    }
+    activeProxyRegistrationCount += 1;
+    return { proxyUrl: activeProxyUrl, stopped: false };
   }
 
-  activeProxyUrl = new URL(proxyUrl.href);
+  activeProxyUrl = normalizedProxyUrl;
+  activeProxyRegistrationCount = 1;
   return { proxyUrl: activeProxyUrl, stopped: false };
 }
 
@@ -26,7 +33,11 @@ export function stopActiveManagedProxyRegistration(
     return;
   }
   registration.stopped = true;
-  if (activeProxyUrl?.href === registration.proxyUrl.href) {
+  if (activeProxyUrl?.href !== registration.proxyUrl.href) {
+    return;
+  }
+  activeProxyRegistrationCount = Math.max(0, activeProxyRegistrationCount - 1);
+  if (activeProxyRegistrationCount === 0) {
     activeProxyUrl = undefined;
   }
 }
@@ -37,4 +48,5 @@ export function getActiveManagedProxyUrl(): ActiveManagedProxyUrl | undefined {
 
 export function _resetActiveManagedProxyStateForTests(): void {
   activeProxyUrl = undefined;
+  activeProxyRegistrationCount = 0;
 }

src/infra/net/proxy/proxy-lifecycle.test.ts

@@ -291,7 +291,7 @@ describe("startProxy", () => {
     expect((global as Record<string, unknown>)["GLOBAL_AGENT"]).toBeUndefined();
   });
 
-  it("rejects overlapping handles with the same managed proxy URL", async () => {
+  it("keeps same-url overlapping handles active until the final stop", async () => {
     const patchedHttpRequest = vi.fn() as unknown as typeof http.request;
     const patchedHttpGet = vi.fn() as unknown as typeof http.get;
     const patchedHttpsRequest = vi.fn() as unknown as typeof https.request;
@@ -311,13 +311,19 @@ describe("startProxy", () => {
       enabled: true,
       proxyUrl: "http://127.0.0.1:3128",
     });
+    const secondHandle = await startProxy({
+      enabled: true,
+      proxyUrl: "http://127.0.0.1:3128",
+    });
 
-    await expect(
-      startProxy({
-        enabled: true,
-        proxyUrl: "http://127.0.0.1:3128",
-      }),
-    ).rejects.toThrow("cannot activate a managed proxy");
+    expect(mockForceResetGlobalDispatcher).toHaveBeenCalledOnce();
+    expect(mockBootstrapGlobalAgent).toHaveBeenCalledOnce();
+    expect(http.request).toBe(patchedHttpRequest);
+    expect(https.request).toBe(patchedHttpsRequest);
+    expect(process.env["HTTP_PROXY"]).toBe("http://127.0.0.1:3128");
+    expect(process.env["OPENCLAW_PROXY_ACTIVE"]).toBe("1");
+
+    await stopProxy(secondHandle);
 
     expect(http.request).toBe(patchedHttpRequest);
     expect(https.request).toBe(patchedHttpsRequest);

src/infra/net/proxy/proxy-lifecycle.ts

@@ -343,6 +343,9 @@ function stopActiveProxyRegistration(registration: ActiveManagedProxyRegistratio
     return;
   }
   stopActiveManagedProxyRegistration(registration);
+  if (getActiveManagedProxyUrl()) {
+    return;
+  }
 
   const restoreSnapshot = baseProxyEnvSnapshot ?? captureProxyEnv();
   baseProxyEnvSnapshot = null;
@@ -390,11 +393,21 @@ export async function startProxy(config: ProxyConfig | undefined): Promise<Proxy
   }
 
   const proxyUrl = resolveProxyUrl(config);
-  if (getActiveManagedProxyUrl()) {
-    throw new Error(
-      "proxy: cannot activate a managed proxy while another proxy is active; " +
-        "stop the current proxy before changing proxy.proxyUrl.",
-    );
+  const activeProxyUrl = getActiveManagedProxyUrl();
+  if (activeProxyUrl) {
+    const registration = registerActiveManagedProxyUrl(new URL(proxyUrl));
+    const handle: ProxyHandle = {
+      proxyUrl,
+      injectedProxyUrl: proxyUrl,
+      envSnapshot: baseProxyEnvSnapshot ?? captureProxyEnv(),
+      stop: async () => {
+        stopActiveProxyRegistration(registration);
+      },
+      kill: () => {
+        stopActiveProxyRegistration(registration);
+      },
+    };
+    return handle;
   }
   baseProxyEnvSnapshot ??= captureProxyEnv();
   const lifecycleBaseEnvSnapshot = baseProxyEnvSnapshot;