diff --git a/CONSTITUTION.md b/CONSTITUTION.md
index 2092f41..28f7e0b 100644
--- a/CONSTITUTION.md
+++ b/CONSTITUTION.md
@@ -2,7 +2,7 @@
 
 > 本文件定義專案開發的核心準則與不可違反的規範
 > **建立日期**: 2026-01-12
-> **當前版本**: V10.28 (CD sync hot reload 降 502 版)
+> **當前版本**: V10.29 (Gunicorn HUP hot reload 修正版)
 > **最後更新**: 2026-04-30
 
 ---
diff --git a/app.py b/app.py
index 577ead3..8d4e593 100644
--- a/app.py
+++ b/app.py
@@ -95,8 +95,8 @@ except Exception as e:
     sys_log.error(f"無法檢測磁碟空間: {e}")
 
 # 🚩 系統版本定義 (備份與顯示用)
-# 🚩 2026-04-30 V10.28: CD sync hot reload without app container restart
-SYSTEM_VERSION = "V10.28"
+# 🚩 2026-04-30 V10.29: Gunicorn HUP reload imports updated app code
+SYSTEM_VERSION = "V10.29"
 
 # ==========================================
 # 🔒 SQL Injection 防護函數
diff --git a/config.py b/config.py
index 0e6865e..23fcf92 100644
--- a/config.py
+++ b/config.py
@@ -254,7 +254,7 @@ YOUTUBE_API_KEY = os.getenv('YOUTUBE_API_KEY', '')
 # ==========================================
 # 系統版本與路徑
 # ==========================================
-SYSTEM_VERSION = "V10.28"
+SYSTEM_VERSION = "V10.29"
 LOG_FILE_PATH = os.path.join(BASE_DIR, 'logs/system.log')
 public_url = PUBLIC_URL  # 用於模板顯示
 
diff --git a/docs/memory/ai_automation_closure_20260429.md b/docs/memory/ai_automation_closure_20260429.md
index 9b6e4c0..99c05f6 100644
--- a/docs/memory/ai_automation_closure_20260429.md
+++ b/docs/memory/ai_automation_closure_20260429.md
@@ -51,7 +51,7 @@
 - Monitoring compose 的 cAdvisor 只需在 `monitoring` network 內提供 `cadvisor:8080` 給 Prometheus，不應綁定 host `8080`，避免與其他服務衝突；blackbox target 需要 `blackbox-exporter` 容器存在於同一 network。
 - 2026-04-30 線上驗證：目前 active MOMO UAT blackbox target 只保留 `https://mo.wooo.work`；`momo.wooo.work` 與 `wooo.work` 需等 DNS/Nginx 恢復後再加入 active monitoring。
 - 110 Gitea runner 必須只宣告 `ewoooc-host` label；若混入 `ubuntu-latest` / `awoooi-host`，EWOOOC 與 AWOOOI workflows 會互相搶同一個 runner，導致推版卡住或跨專案污染。
-- CD sync 模式應對 `momo-pro-system` 發 Gunicorn `HUP` 熱重載，不重啟 app 容器；scheduler / telegram-bot 才用 compose restart，避免每次一般程式碼推版都產生短暫 502。
+- CD sync 模式應對 `momo-pro-system` 發 Gunicorn `HUP` 熱重載，不重啟 app 容器；scheduler / telegram-bot 才用 compose restart。Gunicorn 必須維持 `preload_app = False`，否則 HUP 只重啟 worker、但 app object 仍來自舊 master 預載程式碼。
 - App container 的 runtime `gunicorn.conf.py` 由 `docker-compose.yml` bind mount；若未來改 gunicorn 設定，不應再手動 `docker cp` 作為常態流程。
 
 ## 驗證紀錄
diff --git a/docs/memory/history_logs.md b/docs/memory/history_logs.md
index b103e79..e41b337 100644
--- a/docs/memory/history_logs.md
+++ b/docs/memory/history_logs.md
@@ -50,7 +50,7 @@
 - **Active blackbox target 降噪**: 線上 Nginx 與 curl 驗證目前有效 MOMO 入口為 `https://mo.wooo.work`；`momo.wooo.work` 逾時、`wooo.work` DNS 不解析，先從 active UAT blackbox targets 移除，避免舊域名噪音誤導告警。
 - **action_plans schema drift 修復**: CodeReview pipeline 寫入 action plan 時發現線上表只有 NemoTron Group B 欄位；啟動期 PostgreSQL metadata repair 會補 `action_type` / `description` / `priority` / `metadata_json` 與 index，恢復 AI code review action plan 閉環。
 - **Gitea runner label 隔離**: EWOOOC CD workflow 改用 `ewoooc-host`；110 的 `/home/wooo/act-runner` runner config 必須只宣告 `ewoooc-host`，避免 user-level runner 混接 AWOOOI workflow。
-- **CD sync hot reload**: 一般 Python/模板同步不再 `restart momo-app`，改為 `docker kill -s HUP momo-pro-system` 讓 Gunicorn 熱重載 workers，只重啟 scheduler / telegram-bot，降低推版 502 窗口。
+- **CD sync hot reload**: 一般 Python/模板同步不再 `restart momo-app`，改為 `docker kill -s HUP momo-pro-system` 讓 Gunicorn 熱重載 workers，只重啟 scheduler / telegram-bot；Gunicorn 關閉 `preload_app`，確保 HUP 後 workers 會 import 新版 app code。
 
 ### 2026-04-28~29：Phase 3e 重構大戰 + daily_sales cache 隱形 bug 根除
 - **app.py 縮減 -10.8%**: 7,386 → 6,590 行，11 commits 全綠零 502。
diff --git a/gunicorn.conf.py b/gunicorn.conf.py
index b772cb8..086194b 100644
--- a/gunicorn.conf.py
+++ b/gunicorn.conf.py
@@ -1,7 +1,8 @@
 """Gunicorn runtime config.
 
-`preload_app` imports Flask before worker fork. Any SQLAlchemy engines created
-during import must drop inherited connection pools in each child worker.
+Workers import Flask themselves so `HUP` can reload bind-mounted Python files
+without restarting the app container. If preload is re-enabled, hot reload will
+restart workers but keep the preloaded app object from the old master process.
 """
 
 import os
@@ -15,7 +16,7 @@ workers = int(os.getenv("WEB_CONCURRENCY", "4"))
 timeout = int(os.getenv("GUNICORN_TIMEOUT", "300"))
 accesslog = "-"
 errorlog = "-"
-preload_app = True
+preload_app = False
 
 
 def _dispose_engine(engine, label, server):
diff --git a/tests/test_cd_health_check.py b/tests/test_cd_health_check.py
index 976c28c..5f715af 100644
--- a/tests/test_cd_health_check.py
+++ b/tests/test_cd_health_check.py
@@ -24,11 +24,13 @@ def test_cd_health_check_validates_internal_and_external_health():
 
 def test_cd_sync_mode_hot_reloads_app_without_container_restart():
     workflow = CD_WORKFLOW.read_text(encoding="utf-8")
+    gunicorn_config = (ROOT / "gunicorn.conf.py").read_text(encoding="utf-8")
 
     assert "docker compose up -d --no-deps momo-app scheduler telegram-bot" in workflow
     assert "docker kill -s HUP momo-pro-system" in workflow
     assert "docker compose restart scheduler telegram-bot" in workflow
     assert "docker compose restart momo-app" not in workflow
+    assert "preload_app = False" in gunicorn_config
 
 
 def test_cd_rebuild_builds_image_before_stopping_running_containers():
diff --git a/tests/test_gunicorn_config.py b/tests/test_gunicorn_config.py
index 3a88cba..407d1b6 100644
--- a/tests/test_gunicorn_config.py
+++ b/tests/test_gunicorn_config.py
@@ -72,3 +72,9 @@ def test_post_fork_disposes_database_manager_instance_cache(monkeypatch):
     config.post_fork(_Server(), _Worker())
 
     assert id(engine.pool) != before_pool
+
+
+def test_gunicorn_disables_preload_for_hup_hot_reload():
+    config = _load_gunicorn_config()
+
+    assert config.preload_app is False