diff --git a/.gitignore b/.gitignore
index d66e7eb58..d19f21e69 100644
--- a/.gitignore
+++ b/.gitignore
@@ -49,3 +49,9 @@ tracker_tasks.json
 
 # Schema metadata snapshot
 schema-metadata-snapshot.json
+-e 
+# Environment files with sensitive data
+.env.production
+.env.staging
+.env.local
+.env.*.local
diff --git a/infra/docker/infra.yml b/infra/docker/infra.yml
index 5e5327d08..13602c7ca 100644
--- a/infra/docker/infra.yml
+++ b/infra/docker/infra.yml
@@ -8,7 +8,7 @@ services:
     environment:
       POSTGRES_DB: xiaoxia_saas
       POSTGRES_USER: xiaoxia
-      POSTGRES_PASSWORD: xiaoxia_password
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-changeme_in_production}
     ports:
       - "5432:5432"
     volumes:
diff --git a/packages/application/auth/jwt_handler.py b/packages/application/auth/jwt_handler.py
index 7c0efef84..53766e71d 100644
--- a/packages/application/auth/jwt_handler.py
+++ b/packages/application/auth/jwt_handler.py
@@ -7,7 +7,7 @@ JWT 处理器委托层
 使用方式：
     from packages.application.auth.jwt_handler import JWTHandler, get_jwt_handler
     
-    jwt_handler = JWTHandler(secret_key="your-secret-key")
+    jwt_handler = JWTHandler(secret_key="<YOUR_SECRET_KEY>")
     token = jwt_handler.create_access_token(user_id="user123", workspace_id="ws456", role="admin")
     payload = jwt_handler.verify_access_token(token)
 """
diff --git a/scripts/smoke_public_auth_flow.py b/scripts/smoke_public_auth_flow.py
index 0e6996c04..93470e5e2 100644
--- a/scripts/smoke_public_auth_flow.py
+++ b/scripts/smoke_public_auth_flow.py
@@ -8,6 +8,7 @@ login, /auth/me, and /workspaces. Uses only the Python standard library.
 from __future__ import annotations
 
 import argparse
+import os
 import json
 import time
 import urllib.error
@@ -41,7 +42,7 @@ def main() -> int:
     timestamp = int(time.time())
     email = f"smoke-{timestamp}@example.com"
     username = f"smoke{timestamp}"
-    password = "AuditPass123!"
+    password = os.environ.get("SMOKE_TEST_PASSWORD", "changeme")
 
     register_status, register_body = request_json(
         "POST",
diff --git a/scripts/smoke_public_boundary_flow.py b/scripts/smoke_public_boundary_flow.py
index 577b7bb45..4d9b356bb 100644
--- a/scripts/smoke_public_boundary_flow.py
+++ b/scripts/smoke_public_boundary_flow.py
@@ -4,10 +4,11 @@ import io
 import time
 import uuid
 
+import os
 import requests
 
 BASE_URL = "https://saas.xiaoxiajianji.com/api/v1"
-PASSWORD = "SmokePass123!"
+PASSWORD = os.environ.get("SMOKE_TEST_PASSWORD", "changeme")
 
 
 def _json_or_raise(name: str, response: requests.Response) -> dict:
diff --git a/scripts/smoke_public_upload_flow.py b/scripts/smoke_public_upload_flow.py
index 10aa7170e..8946f414a 100644
--- a/scripts/smoke_public_upload_flow.py
+++ b/scripts/smoke_public_upload_flow.py
@@ -10,10 +10,11 @@ import io
 import time
 import uuid
 
+import os
 import requests
 
 BASE_URL = "https://saas.xiaoxiajianji.com/api/v1"
-PASSWORD = "SmokePass123!"
+PASSWORD = os.environ.get("SMOKE_TEST_PASSWORD", "changeme")
 
 
 def _json_or_raise(name: str, response: requests.Response) -> dict: