diff --git a/docs/technical/【开发运维】Jenkins容器预览部署控制面技术方案-2026-08-15.md b/docs/technical/【开发运维】Jenkins容器预览部署控制面技术方案-2026-08-15.md
index de41c048d..786295289 100644
--- a/docs/technical/【开发运维】Jenkins容器预览部署控制面技术方案-2026-08-15.md
+++ b/docs/technical/【开发运维】Jenkins容器预览部署控制面技术方案-2026-08-15.md
@@ -94,6 +94,8 @@ SpacetimeDB 2.7 CLI 发布到受控 Compose 网络地址时固定使用 `--yes=r
 
 Jenkins 在构建完成、归档 artifact 和更新 REST 状态之间可能短暂返回不可解析的状态正文。控制服务对队列、构建状态和 artifact 查询执行有限重试；单次瞬态响应不得把已经成功并健康的部署永久写成 `failed`。
 
+控制服务查询 Jenkins 队列与构建状态时必须使用 `tree` 参数限制到所需字段，避免完整 `api/json` 的大体积深层对象触发 JSON 递归深度限制。预览 Compose 中的外部生成 worker 使用 `restart: on-failure`；它若早于 API 完成模型定价运行时身份初始化而启动失败，应由 Docker 自动重启并在身份就绪后稳定运行。
+
 ## 安全边界
 
 - 服务端缺少控制面访问口令或 Jenkins service account 凭据时必须拒绝启动，不允许退化成匿名写接口。
diff --git a/scripts/check-preview-deployer.mjs b/scripts/check-preview-deployer.mjs
index a4dd379a8..4680d1d0a 100644
--- a/scripts/check-preview-deployer.mjs
+++ b/scripts/check-preview-deployer.mjs
@@ -111,6 +111,16 @@ assertIncludes(
   'spacetimedb:\n    mem_limit: 2g\n    ports: !reset []',
   '预览 SpacetimeDB 必须覆盖压测基线内存限制，避免模块首次加载时 OOM。',
 );
+assertIncludes(
+  deployer,
+  'external-generation-worker:\n    build:',
+  '预览 compose override 必须配置外部生成 worker。',
+);
+assertIncludes(
+  deployer,
+  'restart: on-failure',
+  '预览外部生成 worker 必须在运行时身份初始化竞态后自动重启。',
+);
 assertIncludes(
   deployer,
   '^preview-[0-9a-f]{16}$',
diff --git a/scripts/jenkins-preview-deployer.sh b/scripts/jenkins-preview-deployer.sh
index ed942b973..0171628b8 100644
--- a/scripts/jenkins-preview-deployer.sh
+++ b/scripts/jenkins-preview-deployer.sh
@@ -296,6 +296,7 @@ services:
     build:
       context: ${GENARRATIVE_PREVIEW_SOURCE_DIR}
       dockerfile: ${GENARRATIVE_PREVIEW_CONTROLLER_ROOT}/deploy/container/api-server.Dockerfile
+    restart: on-failure
   nginx:
     build:
       context: ${GENARRATIVE_PREVIEW_SOURCE_DIR}
diff --git a/server-rs/crates/preview-deployer-server/src/jenkins.rs b/server-rs/crates/preview-deployer-server/src/jenkins.rs
index 27f8538c3..19d9e8be3 100644
--- a/server-rs/crates/preview-deployer-server/src/jenkins.rs
+++ b/server-rs/crates/preview-deployer-server/src/jenkins.rs
@@ -205,10 +205,13 @@ impl JenkinsClient {
         Fut: Future<Output = ()>,
     {
         let build_url = loop {
-            let item_url = reference
+            let mut item_url = reference
                 .queue_url
                 .join("api/json")
                 .map_err(|error| error.to_string())?;
+            item_url
+                .query_pairs_mut()
+                .append_pair("tree", "cancelled,executable[url]");
             let item: QueueItem = self.get_json_with_retry(item_url).await?;
             if item.cancelled.unwrap_or(false) {
                 return Ok(JenkinsOutcome {
@@ -226,9 +229,12 @@ impl JenkinsClient {
 
         on_build(build_url.as_str()).await;
         let successful = loop {
-            let state_url = build_url
+            let mut state_url = build_url
                 .join("api/json")
                 .map_err(|error| error.to_string())?;
+            state_url
+                .query_pairs_mut()
+                .append_pair("tree", "building,result");
             let state: BuildState = self.get_json_with_retry(state_url).await?;
             if state.building {
                 tokio::time::sleep(self.poll_interval).await;
diff --git a/server-rs/crates/preview-deployer-server/src/tests.rs b/server-rs/crates/preview-deployer-server/src/tests.rs
index 03f90e6ed..615981c31 100644
--- a/server-rs/crates/preview-deployer-server/src/tests.rs
+++ b/server-rs/crates/preview-deployer-server/src/tests.rs
@@ -103,7 +103,13 @@ async fn mock_queue(axum::extract::Path(id): axum::extract::Path<u64>) -> Json<V
     )
 }
 
-async fn mock_build(State(state): State<MockJenkinsState>) -> impl IntoResponse {
+async fn mock_build(
+    State(state): State<MockJenkinsState>,
+    uri: axum::http::Uri,
+) -> impl IntoResponse {
+    if uri.query() != Some("tree=building%2Cresult") {
+        return (StatusCode::BAD_REQUEST, "missing bounded tree query").into_response();
+    }
     if state
         .invalid_build_responses
         .fetch_update(Ordering::SeqCst, Ordering::SeqCst, |remaining| {