diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index ebbe9686044..c6a52301044 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -1,3 +1,5 @@
+# Automatically generated by gen_requirements_all.py, do not edit
+
 aiodiscover==1.5.1
 aiohttp-fast-url-dispatcher==0.1.0
 aiohttp-zlib-ng==0.1.1
diff --git a/requirements.txt b/requirements.txt
index 1ca4643a747..f751354a4a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,5 @@
+# Automatically generated by gen_requirements_all.py, do not edit
+
 -c homeassistant/package_constraints.txt
 
 # Home Assistant Core
diff --git a/requirements_all.txt b/requirements_all.txt
index 7c821ee55a3..61ea011b1b3 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1,4 +1,6 @@
 # Home Assistant Core, full dependency set
+# Automatically generated by gen_requirements_all.py, do not edit
+
 -r requirements.txt
 
 # homeassistant.components.aemet
diff --git a/script/gen_requirements_all.py b/script/gen_requirements_all.py
index cb202ed0466..2c442ed9796 100755
--- a/script/gen_requirements_all.py
+++ b/script/gen_requirements_all.py
@@ -182,6 +182,10 @@ get-mac==1000000000.0.0
 charset-normalizer==3.2.0
 """
 
+GENERATED_MESSAGE = (
+    f"# Automatically generated by {Path(__file__).name}, do not edit\n\n"
+)
+
 IGNORE_PRE_COMMIT_HOOK_ID = (
     "check-executables-have-shebangs",
     "check-json",
@@ -354,6 +358,7 @@ def generate_requirements_list(reqs: dict[str, list[str]]) -> str:
 def requirements_output() -> str:
     """Generate output for requirements."""
     output = [
+        GENERATED_MESSAGE,
         "-c homeassistant/package_constraints.txt\n",
         "\n",
         "# Home Assistant Core\n",
@@ -368,6 +373,7 @@ def requirements_all_output(reqs: dict[str, list[str]]) -> str:
     """Generate output for requirements_all."""
     output = [
         "# Home Assistant Core, full dependency set\n",
+        GENERATED_MESSAGE,
         "-r requirements.txt\n",
     ]
     output.append(generate_requirements_list(reqs))
@@ -379,8 +385,7 @@ def requirements_test_all_output(reqs: dict[str, list[str]]) -> str:
     """Generate output for test_requirements."""
     output = [
         "# Home Assistant tests, full dependency set\n",
-        f"# Automatically generated by {Path(__file__).name}, do not edit\n",
-        "\n",
+        GENERATED_MESSAGE,
         "-r requirements_test.txt\n",
     ]
 
@@ -425,7 +430,8 @@ def requirements_pre_commit_output() -> str:
 def gather_constraints() -> str:
     """Construct output for constraint file."""
     return (
-        "\n".join(
+        GENERATED_MESSAGE
+        + "\n".join(
             sorted(
                 {
                     *core_requirements(),