diff --git a/.gitignore b/.gitignore
index 3ef7aab..ffee6a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,6 +12,8 @@ __pycache__/
 .vscode/
 .idea/
 *.log
+.logs/
+.pids/
 
 # api
 api/.venv/
diff --git a/.memory/worklog.json b/.memory/worklog.json
index e1be6c2..18395f6 100644
--- a/.memory/worklog.json
+++ b/.memory/worklog.json
@@ -1,19 +1,5 @@
 {
   "entries": [
-    {
-      "files_changed": 4,
-      "hash": "aec7fda",
-      "message": "auto-save 2026-05-13 18:57 (+1, ~3)",
-      "ts": "2026-05-13T19:01:14+08:00",
-      "type": "commit"
-    },
-    {
-      "files_changed": 3,
-      "hash": "6fb00da",
-      "message": "auto-save 2026-05-13 19:06 (~3)",
-      "ts": "2026-05-13T19:06:46+08:00",
-      "type": "commit"
-    },
     {
       "files_changed": 1,
       "message": "Codex 会话活跃 · 最近命令：codex · 1 项未提交变更 · 最近提交：auto-save 2026-05-13 19:06 (~3)",
@@ -3250,6 +3236,19 @@
       "message": "auto-save 2026-05-15 11:07 (~1)",
       "hash": "9e5d853",
       "files_changed": 1
+    },
+    {
+      "ts": "2026-05-15T11:12:45+08:00",
+      "type": "commit",
+      "message": "auto-save 2026-05-15 11:12 (~1)",
+      "hash": "4d66653",
+      "files_changed": 1
+    },
+    {
+      "ts": "2026-05-15T03:14:44Z",
+      "type": "session-heartbeat",
+      "message": "Codex 会话活跃 · 最近命令：codex · 1 项未提交变更 · 最近提交：auto-save 2026-05-15 11:12 (~1)",
+      "files_changed": 1
     }
   ]
 }
diff --git a/RULES.md b/RULES.md
index c5baa22..85c1e28 100644
--- a/RULES.md
+++ b/RULES.md
@@ -1,6 +1,8 @@
 # SKG AI 素材管线 - TK 二创验证
 
 ## 启动
+- 后台启动（不弹 Terminal）：`./scripts/start-dev-background.sh`（前端 4290 + 后端 4291，日志写入 `.logs/`）
+- 后台停止：`./scripts/stop-dev-background.sh`
 - 前端 dev：`cd web && pnpm dev`（Next.js 16，端口 4290）
 - 后端 dev：`cd api && uvicorn main:app --host 127.0.0.1 --port 4291`（FastAPI，端口 4291，重任务用）
 - 注意：后端不要带 `--reload` 跑长下载 / 抽帧 / 音频任务；reload 会等待后台任务结束，导致 4291 端口占用但新请求卡住。
diff --git a/docs/source-analysis.html b/docs/source-analysis.html
index a9220a8..e3aa7f9 100644
--- a/docs/source-analysis.html
+++ b/docs/source-analysis.html
@@ -523,6 +523,16 @@
             <tr><th>项目</th><th>命令 / 入口</th><th>说明</th></tr>
           </thead>
           <tbody>
+            <tr>
+              <td>本地后台启动</td>
+              <td><code>./scripts/start-dev-background.sh</code></td>
+              <td>不弹出 macOS Terminal 窗口；自动检查 4290 / 4291，缺哪个启动哪个，日志写入 <code>.logs/</code>，PID 写入 <code>.pids/</code>。</td>
+            </tr>
+            <tr>
+              <td>本地后台停止</td>
+              <td><code>./scripts/stop-dev-background.sh</code></td>
+              <td>按 <code>.pids/</code> 里的 PID 停止后台前端 / 后端进程。</td>
+            </tr>
             <tr>
               <td>前端开发服务</td>
               <td><code>cd web && pnpm dev</code></td>
@@ -919,6 +929,17 @@ SubjectAsset {
         <h2>变更记录</h2>
         <p>这个记录不是 git log 的替代品。它记录“产品理解发生了什么变化、影响了哪些源码、你以后描述需求时该怎么说”。后续每次改功能都要补一条。</p>
         <div class="changelog">
+          <article class="change">
+            <header>
+              <h3>2026-05-15 · 本地启动改为后台不弹 Terminal</h3>
+              <span class="tag gray">Runtime</span>
+            </header>
+            <div class="body">
+              <p><strong>问题：</strong>通过 macOS Terminal 启动后端会每次弹出一个终端窗口，打开页面时干扰使用。</p>
+              <p><strong>改动：</strong>新增 <code>scripts/start-dev-background.sh</code> 和 <code>scripts/stop-dev-background.sh</code>。启动脚本自动检查前端 4290 和后端 4291，缺哪个后台启动哪个，日志写入 <code>.logs/</code>，PID 写入 <code>.pids/</code>，以后无需通过 <code>osascript</code> 打开 Terminal。</p>
+              <p><strong>影响：</strong><code>scripts/start-dev-background.sh</code>、<code>scripts/stop-dev-background.sh</code>、<code>.gitignore</code>、<code>RULES.md</code>、<code>docs/source-analysis.html</code>。</p>
+            </div>
+          </article>
           <article class="change">
             <header>
               <h3>2026-05-14 · 产品融合按真实产品外置合成</h3>
diff --git a/scripts/start-dev-background.sh b/scripts/start-dev-background.sh
new file mode 100755
index 0000000..523d3ac
--- /dev/null
+++ b/scripts/start-dev-background.sh
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+API_DIR="$ROOT_DIR/api"
+WEB_DIR="$ROOT_DIR/web"
+LOG_DIR="$ROOT_DIR/.logs"
+PID_DIR="$ROOT_DIR/.pids"
+
+mkdir -p "$LOG_DIR" "$PID_DIR"
+
+port_is_listening() {
+  local port="$1"
+  lsof -tiTCP:"$port" -sTCP:LISTEN >/dev/null 2>&1
+}
+
+start_api() {
+  if port_is_listening 4291; then
+    echo "api already running on 4291"
+    return
+  fi
+  if [[ ! -x "$API_DIR/.venv/bin/uvicorn" ]]; then
+    echo "missing api/.venv/bin/uvicorn" >&2
+    exit 1
+  fi
+  (
+    cd "$API_DIR"
+    nohup .venv/bin/uvicorn main:app --host 127.0.0.1 --port 4291 >> "$LOG_DIR/api.log" 2>&1 &
+    echo $! > "$PID_DIR/api.pid"
+  )
+  echo "api started on 4291, log: $LOG_DIR/api.log"
+}
+
+start_web() {
+  if port_is_listening 4290; then
+    echo "web already running on 4290"
+    return
+  fi
+  if ! command -v pnpm >/dev/null 2>&1; then
+    echo "missing pnpm in PATH" >&2
+    exit 1
+  fi
+  (
+    cd "$WEB_DIR"
+    nohup pnpm dev >> "$LOG_DIR/web.log" 2>&1 &
+    echo $! > "$PID_DIR/web.pid"
+  )
+  echo "web started on 4290, log: $LOG_DIR/web.log"
+}
+
+start_api
+start_web
+echo "open http://localhost:4290"
diff --git a/scripts/stop-dev-background.sh b/scripts/stop-dev-background.sh
new file mode 100755
index 0000000..717b691
--- /dev/null
+++ b/scripts/stop-dev-background.sh
@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+PID_DIR="$ROOT_DIR/.pids"
+
+stop_pid_file() {
+  local name="$1"
+  local file="$PID_DIR/$name.pid"
+  if [[ ! -f "$file" ]]; then
+    echo "$name pid file not found"
+    return
+  fi
+  local pid
+  pid="$(cat "$file")"
+  if [[ -n "$pid" ]] && kill -0 "$pid" >/dev/null 2>&1; then
+    kill -TERM "$pid"
+    echo "$name stopped: $pid"
+  else
+    echo "$name already stopped"
+  fi
+  rm -f "$file"
+}
+
+stop_pid_file api
+stop_pid_file web