diff --git a/.github/workflows/smoke-docker-sbx.lock.yml b/.github/workflows/smoke-docker-sbx.lock.yml
index 0e49480a3..d61667e2e 100644
--- a/.github/workflows/smoke-docker-sbx.lock.yml
+++ b/.github/workflows/smoke-docker-sbx.lock.yml
@@ -654,7 +654,8 @@ jobs:
           sbx daemon stop || true
           sbx policy reset --force || true
           sbx policy init allow-all
-          nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &
+          DOCKER_SANDBOXES_PROXY=http://host.docker.internal:3128 \
+            nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &
           disown
           for i in $(seq 1 10); do
             if sbx daemon status 2>/dev/null | grep -q "running"; then break; fi
diff --git a/.github/workflows/smoke-playwright-docker-sbx.lock.yml b/.github/workflows/smoke-playwright-docker-sbx.lock.yml
index 9e132e416..889b36bba 100644
--- a/.github/workflows/smoke-playwright-docker-sbx.lock.yml
+++ b/.github/workflows/smoke-playwright-docker-sbx.lock.yml
@@ -655,7 +655,8 @@ jobs:
           sbx daemon stop || true
           sbx policy reset --force || true
           sbx policy init allow-all
-          nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &
+          DOCKER_SANDBOXES_PROXY=http://host.docker.internal:3128 \
+            nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &
           disown
           for i in $(seq 1 10); do
             if sbx daemon status 2>/dev/null | grep -q "running"; then break; fi
diff --git a/scripts/ci/postprocess-smoke-workflows.ts b/scripts/ci/postprocess-smoke-workflows.ts
index 5a6192ce5..5ea3ac295 100644
--- a/scripts/ci/postprocess-smoke-workflows.ts
+++ b/scripts/ci/postprocess-smoke-workflows.ts
@@ -148,7 +148,8 @@ const SBX_INSTALL_AND_AUTH_STEPS =
   '          sbx daemon stop || true\n' +
   '          sbx policy reset --force || true\n' +
   '          sbx policy init allow-all\n' +
-  '          nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &\n' +
+  '          DOCKER_SANDBOXES_PROXY=http://host.docker.internal:3128 \\\n' +
+  '            nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &\n' +
   '          disown\n' +
   '          for i in $(seq 1 10); do\n' +
   '            if sbx daemon status 2>/dev/null | grep -q "running"; then break; fi\n' +
@@ -209,6 +210,20 @@ for (const sbxLockPath of sbxLockPaths) {
       } else {
         console.log(`  WARNING: Could not find lockdown anchor; sbx install/auth steps not injected`);
       }
+    } else if (
+      !sbxContent.includes(
+        'sbx policy init allow-all\n' +
+          '          DOCKER_SANDBOXES_PROXY=http://host.docker.internal:3128 \\\n' +
+          '            nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &',
+      )
+    ) {
+      const sbxInstallAuthRegex = / {6}- name: Install Docker sbx CLI\n[\s\S]*?(?= {6}- name: Determine automatic lockdown mode)/;
+      if (sbxInstallAuthRegex.test(sbxContent)) {
+        sbxContent = sbxContent.replace(sbxInstallAuthRegex, SBX_INSTALL_AND_AUTH_STEPS);
+        console.log(`  Updated sbx CLI install and daemon auth steps with proxy enforcement`);
+      } else {
+        console.log(`  WARNING: Could not update sbx auth steps`);
+      }
     } else {
       console.log(`  sbx CLI install and auth steps already present`);
     }
diff --git a/scripts/ci/smoke-docker-sbx-workflow.test.ts b/scripts/ci/smoke-docker-sbx-workflow.test.ts
index ad566dd56..776f5adc4 100644
--- a/scripts/ci/smoke-docker-sbx-workflow.test.ts
+++ b/scripts/ci/smoke-docker-sbx-workflow.test.ts
@@ -5,6 +5,11 @@ const workflowsDir = path.resolve(__dirname, '../../.github/workflows');
 const sourcePath = path.join(workflowsDir, 'smoke-docker-sbx.md');
 const lockPath = path.join(workflowsDir, 'smoke-docker-sbx.lock.yml');
 
+const playwrightLockPath = path.join(
+  workflowsDir,
+  'smoke-playwright-docker-sbx.lock.yml',
+);
+
 describe('smoke docker-sbx workflow output targeting', () => {
   it('explicitly targets the pull request in the source prompt', () => {
     const workflow = fs.readFileSync(sourcePath, 'utf8');
@@ -20,4 +25,20 @@ describe('smoke docker-sbx workflow output targeting', () => {
       'GH_AW_GITHUB_EVENT_PULL_REQUEST_NUMBER: ${{ github.event.pull_request.number || inputs.item_number }}',
     );
   });
+
+  it('starts the final sbx daemon instance with AWF Squid proxy enforcement', () => {
+    const workflow = fs.readFileSync(lockPath, 'utf8');
+
+    expect(workflow).toContain(
+      'sbx policy init allow-all\n          DOCKER_SANDBOXES_PROXY=http://host.docker.internal:3128 \\\n            nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &',
+    );
+  });
+
+  it('enforces Squid proxy on final sbx daemon instance in playwright smoke workflow', () => {
+    const workflow = fs.readFileSync(playwrightLockPath, 'utf8');
+
+    expect(workflow).toContain(
+      'sbx policy init allow-all\n          DOCKER_SANDBOXES_PROXY=http://host.docker.internal:3128 \\\n            nohup sbx daemon start > /tmp/sbx-daemon.log 2>&1 &',
+    );
+  });
 });