From ef69acd76b592353eaa5ae3fef3a76da9b2c431a Mon Sep 17 00:00:00 2001
From: vtino17 <vsvalentinosaputra.98@gmail.com>
Date: Wed, 22 Jul 2026 14:54:48 +0700
Subject: [PATCH] Improve dev server warning message to include deployment
 options

---
 docs/deploying/index.rst | 7 +++----
 docs/server.rst          | 9 ++++-----
 src/flask/app.py         | 7 ++++---
 src/flask/cli.py         | 7 ++++---
 4 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/docs/deploying/index.rst b/docs/deploying/index.rst
index dcef8abe08..cc6e3b9dcf 100644
--- a/docs/deploying/index.rst
+++ b/docs/deploying/index.rst
@@ -9,10 +9,9 @@ WSGI server or hosting platform, some of which will be described here.
 
 "Production" means "not development", which applies whether you're
 serving your application publicly to millions of users or privately /
-locally to a single user. **Do not use the development server when
-deploying to production. It is intended for use only during local
-development. It is not designed to be particularly secure, stable, or
-efficient.**
+locally to a single user. **This is a development server. Do not use
+it in a production deployment. It is not designed to be particularly
+secure, stable, or efficient.**
 
 Self-Hosted Options
 -------------------
diff --git a/docs/server.rst b/docs/server.rst
index d6beb1d86d..5854e2404b 100644
--- a/docs/server.rst
+++ b/docs/server.rst
@@ -9,11 +9,10 @@ changed.
 
 .. warning::
 
-    Do not use the development server when deploying to production. It
-    is intended for use only during local development. It is not
-    designed to be particularly efficient, stable, or secure.
-
-    See :doc:`/deploying/index` for deployment options.
+    This is a development server. Do not use it in a production
+    deployment. It is not designed to be particularly secure,
+    stable, or efficient. See :doc:`/deploying/index` for
+    deployment options.
 
 Command Line
 ------------
diff --git a/src/flask/app.py b/src/flask/app.py
index 652b9bbf71..7d39c342f7 100644
--- a/src/flask/app.py
+++ b/src/flask/app.py
@@ -639,9 +639,10 @@ def run(
     ) -> None:
         """Runs the application on a local development server.
 
-        Do not use ``run()`` in a production setting. It is not intended to
-        meet security and performance requirements for a production server.
-        Instead, see :doc:`/deploying/index` for WSGI server recommendations.
+        This is a development server. Do not use it in a production
+        deployment. It is not designed to be particularly secure,
+        stable, or efficient. See :doc:`/deploying/index` for WSGI
+        server recommendations.
 
         If the :attr:`debug` flag is set the server will automatically reload
         for code changes and show a debugger in case an exception happened.
diff --git a/src/flask/cli.py b/src/flask/cli.py
index 1a9159ec7c..bc05cd1367 100644
--- a/src/flask/cli.py
+++ b/src/flask/cli.py
@@ -943,10 +943,11 @@ def run_command(
     extra_files: list[str] | None,
     exclude_patterns: list[str] | None,
 ) -> None:
-    """Run a local development server.
+    """Run a development server.
 
-    This server is for development purposes only. It does not provide
-    the stability, security, or performance of production WSGI servers.
+    This is a development server. Do not use it in a production
+    deployment. It is not designed to be particularly secure,
+    stable, or efficient. Use a production WSGI server instead.
 
     The reloader and debugger are enabled by default with the '--debug'
     option.