diff --git a/src/tint/lang/BUILD.cmake b/src/tint/lang/BUILD.cmake
index 63e16fb..d9dca4a 100644
--- a/src/tint/lang/BUILD.cmake
+++ b/src/tint/lang/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/core/BUILD.cmake)
diff --git a/src/tint/lang/BUILD.gn b/src/tint/lang/BUILD.gn
index 67e46cc..a7e945f 100644
--- a/src/tint/lang/BUILD.gn
+++ b/src/tint/lang/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/BUILD.cmake b/src/tint/lang/core/BUILD.cmake
index 734da34..6be18a3 100644
--- a/src/tint/lang/core/BUILD.cmake
+++ b/src/tint/lang/core/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/core/constant/BUILD.cmake)
diff --git a/src/tint/lang/core/BUILD.gn b/src/tint/lang/core/BUILD.gn
index fd44935..d7f838f 100644
--- a/src/tint/lang/core/BUILD.gn
+++ b/src/tint/lang/core/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/access.cc b/src/tint/lang/core/access.cc
index 866a40e..ed9aa50 100644
--- a/src/tint/lang/core/access.cc
+++ b/src/tint/lang/core/access.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/access.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/access.h"
diff --git a/src/tint/lang/core/access.h b/src/tint/lang/core/access.h
index de90083..c60dd32 100644
--- a/src/tint/lang/core/access.h
+++ b/src/tint/lang/core/access.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/access.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_ACCESS_H_
diff --git a/src/tint/lang/core/access_bench.cc b/src/tint/lang/core/access_bench.cc
index 9438ec3..5374d01 100644
--- a/src/tint/lang/core/access_bench.cc
+++ b/src/tint/lang/core/access_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/access_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/access.h"
diff --git a/src/tint/lang/core/access_test.cc b/src/tint/lang/core/access_test.cc
index b4552c8..1dcbf25 100644
--- a/src/tint/lang/core/access_test.cc
+++ b/src/tint/lang/core/access_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/access_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/access.h"
diff --git a/src/tint/lang/core/address_space.cc b/src/tint/lang/core/address_space.cc
index 4f4aaa1..efc87a6 100644
--- a/src/tint/lang/core/address_space.cc
+++ b/src/tint/lang/core/address_space.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/address_space.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/address_space.h"
diff --git a/src/tint/lang/core/address_space.h b/src/tint/lang/core/address_space.h
index 3ac09bf..d88857f 100644
--- a/src/tint/lang/core/address_space.h
+++ b/src/tint/lang/core/address_space.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/address_space.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_ADDRESS_SPACE_H_
diff --git a/src/tint/lang/core/address_space_bench.cc b/src/tint/lang/core/address_space_bench.cc
index 252089c..b2933d6 100644
--- a/src/tint/lang/core/address_space_bench.cc
+++ b/src/tint/lang/core/address_space_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/address_space_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/address_space.h"
diff --git a/src/tint/lang/core/address_space_test.cc b/src/tint/lang/core/address_space_test.cc
index 69fea4d..fa78e4c 100644
--- a/src/tint/lang/core/address_space_test.cc
+++ b/src/tint/lang/core/address_space_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/address_space_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/address_space.h"
diff --git a/src/tint/lang/core/attribute.cc b/src/tint/lang/core/attribute.cc
index c4636ae..5fa8977 100644
--- a/src/tint/lang/core/attribute.cc
+++ b/src/tint/lang/core/attribute.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/attribute.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/attribute.h"
diff --git a/src/tint/lang/core/attribute.h b/src/tint/lang/core/attribute.h
index 925f00f..2d11546 100644
--- a/src/tint/lang/core/attribute.h
+++ b/src/tint/lang/core/attribute.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/attribute.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_ATTRIBUTE_H_
diff --git a/src/tint/lang/core/attribute_bench.cc b/src/tint/lang/core/attribute_bench.cc
index 6cd6945..ee0e693 100644
--- a/src/tint/lang/core/attribute_bench.cc
+++ b/src/tint/lang/core/attribute_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/attribute_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/attribute.h"
diff --git a/src/tint/lang/core/attribute_test.cc b/src/tint/lang/core/attribute_test.cc
index 7cd8b79..bae3463 100644
--- a/src/tint/lang/core/attribute_test.cc
+++ b/src/tint/lang/core/attribute_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/attribute_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/attribute.h"
diff --git a/src/tint/lang/core/builtin.cc b/src/tint/lang/core/builtin.cc
index 36a29fc..073b70d 100644
--- a/src/tint/lang/core/builtin.cc
+++ b/src/tint/lang/core/builtin.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/builtin.h"
diff --git a/src/tint/lang/core/builtin.h b/src/tint/lang/core/builtin.h
index 04a033f..eed8ff7 100644
--- a/src/tint/lang/core/builtin.h
+++ b/src/tint/lang/core/builtin.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_BUILTIN_H_
diff --git a/src/tint/lang/core/builtin_bench.cc b/src/tint/lang/core/builtin_bench.cc
index e872c43..d9eaccc 100644
--- a/src/tint/lang/core/builtin_bench.cc
+++ b/src/tint/lang/core/builtin_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/builtin.h"
diff --git a/src/tint/lang/core/builtin_test.cc b/src/tint/lang/core/builtin_test.cc
index 3852d40..61a2187 100644
--- a/src/tint/lang/core/builtin_test.cc
+++ b/src/tint/lang/core/builtin_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/builtin.h"
diff --git a/src/tint/lang/core/builtin_value.cc b/src/tint/lang/core/builtin_value.cc
index 8f7d04b..3a95999 100644
--- a/src/tint/lang/core/builtin_value.cc
+++ b/src/tint/lang/core/builtin_value.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin_value.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/builtin_value.h"
diff --git a/src/tint/lang/core/builtin_value.h b/src/tint/lang/core/builtin_value.h
index 8925bcd..ff943cf 100644
--- a/src/tint/lang/core/builtin_value.h
+++ b/src/tint/lang/core/builtin_value.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin_value.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_BUILTIN_VALUE_H_
diff --git a/src/tint/lang/core/builtin_value_bench.cc b/src/tint/lang/core/builtin_value_bench.cc
index 50f6ba7..17e1aeb 100644
--- a/src/tint/lang/core/builtin_value_bench.cc
+++ b/src/tint/lang/core/builtin_value_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin_value_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/builtin_value.h"
diff --git a/src/tint/lang/core/builtin_value_test.cc b/src/tint/lang/core/builtin_value_test.cc
index ea2fc5f..06fc061 100644
--- a/src/tint/lang/core/builtin_value_test.cc
+++ b/src/tint/lang/core/builtin_value_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/builtin_value_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/builtin_value.h"
diff --git a/src/tint/lang/core/constant/BUILD.cmake b/src/tint/lang/core/constant/BUILD.cmake
index efc090b..c8a657a 100644
--- a/src/tint/lang/core/constant/BUILD.cmake
+++ b/src/tint/lang/core/constant/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/core/constant/BUILD.gn b/src/tint/lang/core/constant/BUILD.gn
index d468518..cbb4a13 100644
--- a/src/tint/lang/core/constant/BUILD.gn
+++ b/src/tint/lang/core/constant/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/diagnostic_rule.cc b/src/tint/lang/core/diagnostic_rule.cc
index 2a7cbaa..b226240 100644
--- a/src/tint/lang/core/diagnostic_rule.cc
+++ b/src/tint/lang/core/diagnostic_rule.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_rule.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/diagnostic_rule.h"
diff --git a/src/tint/lang/core/diagnostic_rule.h b/src/tint/lang/core/diagnostic_rule.h
index a6b5e0a..0bc5f72 100644
--- a/src/tint/lang/core/diagnostic_rule.h
+++ b/src/tint/lang/core/diagnostic_rule.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_rule.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_DIAGNOSTIC_RULE_H_
diff --git a/src/tint/lang/core/diagnostic_rule_bench.cc b/src/tint/lang/core/diagnostic_rule_bench.cc
index ae79507..4393c23 100644
--- a/src/tint/lang/core/diagnostic_rule_bench.cc
+++ b/src/tint/lang/core/diagnostic_rule_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_rule_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/diagnostic_rule.h"
diff --git a/src/tint/lang/core/diagnostic_rule_test.cc b/src/tint/lang/core/diagnostic_rule_test.cc
index e986435..c20079c 100644
--- a/src/tint/lang/core/diagnostic_rule_test.cc
+++ b/src/tint/lang/core/diagnostic_rule_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_rule_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <string>
diff --git a/src/tint/lang/core/diagnostic_severity.cc b/src/tint/lang/core/diagnostic_severity.cc
index 564eb74..3cde694 100644
--- a/src/tint/lang/core/diagnostic_severity.cc
+++ b/src/tint/lang/core/diagnostic_severity.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_severity.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/diagnostic_severity.h"
diff --git a/src/tint/lang/core/diagnostic_severity.h b/src/tint/lang/core/diagnostic_severity.h
index 1ff5b5f..9a7bd91 100644
--- a/src/tint/lang/core/diagnostic_severity.h
+++ b/src/tint/lang/core/diagnostic_severity.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_severity.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_DIAGNOSTIC_SEVERITY_H_
diff --git a/src/tint/lang/core/diagnostic_severity_bench.cc b/src/tint/lang/core/diagnostic_severity_bench.cc
index 14d4fa6..50a4f11 100644
--- a/src/tint/lang/core/diagnostic_severity_bench.cc
+++ b/src/tint/lang/core/diagnostic_severity_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_severity_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/diagnostic_severity.h"
diff --git a/src/tint/lang/core/diagnostic_severity_test.cc b/src/tint/lang/core/diagnostic_severity_test.cc
index d217d63..78c1d75 100644
--- a/src/tint/lang/core/diagnostic_severity_test.cc
+++ b/src/tint/lang/core/diagnostic_severity_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/diagnostic_severity_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <string>
diff --git a/src/tint/lang/core/extension.cc b/src/tint/lang/core/extension.cc
index 4bdb16d..6d4ff48 100644
--- a/src/tint/lang/core/extension.cc
+++ b/src/tint/lang/core/extension.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/extension.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/extension.h"
diff --git a/src/tint/lang/core/extension.h b/src/tint/lang/core/extension.h
index 0aac98a..da1c9f4 100644
--- a/src/tint/lang/core/extension.h
+++ b/src/tint/lang/core/extension.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/extension.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_EXTENSION_H_
diff --git a/src/tint/lang/core/extension_bench.cc b/src/tint/lang/core/extension_bench.cc
index b6cd53b..d5e13d0 100644
--- a/src/tint/lang/core/extension_bench.cc
+++ b/src/tint/lang/core/extension_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/extension_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/extension.h"
diff --git a/src/tint/lang/core/extension_test.cc b/src/tint/lang/core/extension_test.cc
index deb8b0b..4e21e78 100644
--- a/src/tint/lang/core/extension_test.cc
+++ b/src/tint/lang/core/extension_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/extension_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/extension.h"
diff --git a/src/tint/lang/core/function.cc b/src/tint/lang/core/function.cc
index 3d34627..1e636b3 100644
--- a/src/tint/lang/core/function.cc
+++ b/src/tint/lang/core/function.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/function.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/function.h"
diff --git a/src/tint/lang/core/function.h b/src/tint/lang/core/function.h
index 8d8b23c..4347af9 100644
--- a/src/tint/lang/core/function.h
+++ b/src/tint/lang/core/function.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/function.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_FUNCTION_H_
diff --git a/src/tint/lang/core/interpolation_sampling.cc b/src/tint/lang/core/interpolation_sampling.cc
index ad657b7..ac9940a 100644
--- a/src/tint/lang/core/interpolation_sampling.cc
+++ b/src/tint/lang/core/interpolation_sampling.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_sampling.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/interpolation_sampling.h"
diff --git a/src/tint/lang/core/interpolation_sampling.h b/src/tint/lang/core/interpolation_sampling.h
index fce80f1..f3398f1 100644
--- a/src/tint/lang/core/interpolation_sampling.h
+++ b/src/tint/lang/core/interpolation_sampling.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_sampling.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_INTERPOLATION_SAMPLING_H_
diff --git a/src/tint/lang/core/interpolation_sampling_bench.cc b/src/tint/lang/core/interpolation_sampling_bench.cc
index e5ffdd1..4fea5cf 100644
--- a/src/tint/lang/core/interpolation_sampling_bench.cc
+++ b/src/tint/lang/core/interpolation_sampling_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_sampling_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <array>
diff --git a/src/tint/lang/core/interpolation_sampling_test.cc b/src/tint/lang/core/interpolation_sampling_test.cc
index 8301cfb..f4e9776 100644
--- a/src/tint/lang/core/interpolation_sampling_test.cc
+++ b/src/tint/lang/core/interpolation_sampling_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_sampling_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/interpolation_sampling.h"
diff --git a/src/tint/lang/core/interpolation_type.cc b/src/tint/lang/core/interpolation_type.cc
index c35f6b3..3ed8e26 100644
--- a/src/tint/lang/core/interpolation_type.cc
+++ b/src/tint/lang/core/interpolation_type.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_type.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/interpolation_type.h"
diff --git a/src/tint/lang/core/interpolation_type.h b/src/tint/lang/core/interpolation_type.h
index d4732be..1161193 100644
--- a/src/tint/lang/core/interpolation_type.h
+++ b/src/tint/lang/core/interpolation_type.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_type.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_INTERPOLATION_TYPE_H_
diff --git a/src/tint/lang/core/interpolation_type_bench.cc b/src/tint/lang/core/interpolation_type_bench.cc
index 892bb6a..0f1b4fe 100644
--- a/src/tint/lang/core/interpolation_type_bench.cc
+++ b/src/tint/lang/core/interpolation_type_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_type_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/interpolation_type.h"
diff --git a/src/tint/lang/core/interpolation_type_test.cc b/src/tint/lang/core/interpolation_type_test.cc
index f1902a2..084b75d 100644
--- a/src/tint/lang/core/interpolation_type_test.cc
+++ b/src/tint/lang/core/interpolation_type_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/interpolation_type_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/interpolation_type.h"
diff --git a/src/tint/lang/core/intrinsic/BUILD.cmake b/src/tint/lang/core/intrinsic/BUILD.cmake
index faa135a..4aa2870 100644
--- a/src/tint/lang/core/intrinsic/BUILD.cmake
+++ b/src/tint/lang/core/intrinsic/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/core/intrinsic/data/BUILD.cmake)
diff --git a/src/tint/lang/core/intrinsic/BUILD.gn b/src/tint/lang/core/intrinsic/BUILD.gn
index 4e55311..c5b985b 100644
--- a/src/tint/lang/core/intrinsic/BUILD.gn
+++ b/src/tint/lang/core/intrinsic/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/intrinsic/ctor_conv.cc b/src/tint/lang/core/intrinsic/ctor_conv.cc
index 7abe148..928545e 100644
--- a/src/tint/lang/core/intrinsic/ctor_conv.cc
+++ b/src/tint/lang/core/intrinsic/ctor_conv.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/intrinsic/ctor_conv.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/intrinsic/ctor_conv.h"
diff --git a/src/tint/lang/core/intrinsic/ctor_conv.h b/src/tint/lang/core/intrinsic/ctor_conv.h
index 67ff261..fa68e8d 100644
--- a/src/tint/lang/core/intrinsic/ctor_conv.h
+++ b/src/tint/lang/core/intrinsic/ctor_conv.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/intrinsic/ctor_conv.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_INTRINSIC_CTOR_CONV_H_
diff --git a/src/tint/lang/core/intrinsic/data/BUILD.cmake b/src/tint/lang/core/intrinsic/data/BUILD.cmake
index 8990ca3..8134896 100644
--- a/src/tint/lang/core/intrinsic/data/BUILD.cmake
+++ b/src/tint/lang/core/intrinsic/data/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/core/intrinsic/data/BUILD.gn b/src/tint/lang/core/intrinsic/data/BUILD.gn
index 3673b17..4a096a5 100644
--- a/src/tint/lang/core/intrinsic/data/BUILD.gn
+++ b/src/tint/lang/core/intrinsic/data/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/intrinsic/data/data.cc b/src/tint/lang/core/intrinsic/data/data.cc
index 7248e01..fa6d930 100644
--- a/src/tint/lang/core/intrinsic/data/data.cc
+++ b/src/tint/lang/core/intrinsic/data/data.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/intrinsic/data/data.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <limits>
diff --git a/src/tint/lang/core/ir/BUILD.cmake b/src/tint/lang/core/ir/BUILD.cmake
index 0e8aede..f9c1c07 100644
--- a/src/tint/lang/core/ir/BUILD.cmake
+++ b/src/tint/lang/core/ir/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/core/ir/transform/BUILD.cmake)
diff --git a/src/tint/lang/core/ir/BUILD.gn b/src/tint/lang/core/ir/BUILD.gn
index 146ea38..b665385 100644
--- a/src/tint/lang/core/ir/BUILD.gn
+++ b/src/tint/lang/core/ir/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/ir/transform/BUILD.cmake b/src/tint/lang/core/ir/transform/BUILD.cmake
index 5623215..6bff32a 100644
--- a/src/tint/lang/core/ir/transform/BUILD.cmake
+++ b/src/tint/lang/core/ir/transform/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_IR)
diff --git a/src/tint/lang/core/ir/transform/BUILD.gn b/src/tint/lang/core/ir/transform/BUILD.gn
index ef85e1a..b9a27f8 100644
--- a/src/tint/lang/core/ir/transform/BUILD.gn
+++ b/src/tint/lang/core/ir/transform/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/core/parameter_usage.cc b/src/tint/lang/core/parameter_usage.cc
index 7eb0f07..2a42c49 100644
--- a/src/tint/lang/core/parameter_usage.cc
+++ b/src/tint/lang/core/parameter_usage.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/parameter_usage.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/parameter_usage.h"
diff --git a/src/tint/lang/core/parameter_usage.h b/src/tint/lang/core/parameter_usage.h
index de60163..39e0207 100644
--- a/src/tint/lang/core/parameter_usage.h
+++ b/src/tint/lang/core/parameter_usage.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/parameter_usage.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_PARAMETER_USAGE_H_
diff --git a/src/tint/lang/core/texel_format.cc b/src/tint/lang/core/texel_format.cc
index 4be42ff..d4c82b3 100644
--- a/src/tint/lang/core/texel_format.cc
+++ b/src/tint/lang/core/texel_format.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/texel_format.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/texel_format.h"
diff --git a/src/tint/lang/core/texel_format.h b/src/tint/lang/core/texel_format.h
index 30fcd1e..59d534f 100644
--- a/src/tint/lang/core/texel_format.h
+++ b/src/tint/lang/core/texel_format.h
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/texel_format.h.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #ifndef SRC_TINT_LANG_CORE_TEXEL_FORMAT_H_
diff --git a/src/tint/lang/core/texel_format_bench.cc b/src/tint/lang/core/texel_format_bench.cc
index 55532cc..087cc21 100644
--- a/src/tint/lang/core/texel_format_bench.cc
+++ b/src/tint/lang/core/texel_format_bench.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/texel_format_bench.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/texel_format.h"
diff --git a/src/tint/lang/core/texel_format_test.cc b/src/tint/lang/core/texel_format_test.cc
index 7f7e578..96b61f7 100644
--- a/src/tint/lang/core/texel_format_test.cc
+++ b/src/tint/lang/core/texel_format_test.cc
@@ -13,11 +13,12 @@
 // limitations under the License.
 
 ////////////////////////////////////////////////////////////////////////////////
-// File generated by tools/src/cmd/gen
-// using the template:
+// File generated by 'tools/src/cmd/gen' using the template:
 //   src/tint/lang/core/texel_format_test.cc.tmpl
 //
-// Do not modify this file directly
+// To regenerate run: './tools/run gen'
+//
+//                       Do not modify this file directly
 ////////////////////////////////////////////////////////////////////////////////
 
 #include "src/tint/lang/core/texel_format.h"
diff --git a/src/tint/lang/core/type/BUILD.cmake b/src/tint/lang/core/type/BUILD.cmake
index fbf89d0..d3349e9 100644
--- a/src/tint/lang/core/type/BUILD.cmake
+++ b/src/tint/lang/core/type/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/core/type/BUILD.gn b/src/tint/lang/core/type/BUILD.gn
index 2043c2d..2da1377 100644
--- a/src/tint/lang/core/type/BUILD.gn
+++ b/src/tint/lang/core/type/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/glsl/BUILD.cmake b/src/tint/lang/glsl/BUILD.cmake
index 84d8c48..d393f94 100644
--- a/src/tint/lang/glsl/BUILD.cmake
+++ b/src/tint/lang/glsl/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/glsl/writer/BUILD.cmake)
diff --git a/src/tint/lang/glsl/BUILD.gn b/src/tint/lang/glsl/BUILD.gn
index d8cef06..b8a448e 100644
--- a/src/tint/lang/glsl/BUILD.gn
+++ b/src/tint/lang/glsl/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/glsl/writer/BUILD.cmake b/src/tint/lang/glsl/writer/BUILD.cmake
index ef38b5d..e86bde9 100644
--- a/src/tint/lang/glsl/writer/BUILD.cmake
+++ b/src/tint/lang/glsl/writer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/glsl/writer/ast_printer/BUILD.cmake)
diff --git a/src/tint/lang/glsl/writer/BUILD.gn b/src/tint/lang/glsl/writer/BUILD.gn
index 2486ed1..96d9eb7 100644
--- a/src/tint/lang/glsl/writer/BUILD.gn
+++ b/src/tint/lang/glsl/writer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/glsl/writer/ast_printer/BUILD.cmake b/src/tint/lang/glsl/writer/ast_printer/BUILD.cmake
index 6f2cc8f..f8f380e 100644
--- a/src/tint/lang/glsl/writer/ast_printer/BUILD.cmake
+++ b/src/tint/lang/glsl/writer/ast_printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_GLSL_WRITER)
diff --git a/src/tint/lang/glsl/writer/ast_printer/BUILD.gn b/src/tint/lang/glsl/writer/ast_printer/BUILD.gn
index 83c2ba7..f07d9ca 100644
--- a/src/tint/lang/glsl/writer/ast_printer/BUILD.gn
+++ b/src/tint/lang/glsl/writer/ast_printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/glsl/writer/common/BUILD.cmake b/src/tint/lang/glsl/writer/common/BUILD.cmake
index a08de21..6d67325 100644
--- a/src/tint/lang/glsl/writer/common/BUILD.cmake
+++ b/src/tint/lang/glsl/writer/common/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_GLSL_WRITER)
diff --git a/src/tint/lang/glsl/writer/common/BUILD.gn b/src/tint/lang/glsl/writer/common/BUILD.gn
index 356c9e5..28d33e0 100644
--- a/src/tint/lang/glsl/writer/common/BUILD.gn
+++ b/src/tint/lang/glsl/writer/common/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/hlsl/BUILD.cmake b/src/tint/lang/hlsl/BUILD.cmake
index 4a79af9..1259f29 100644
--- a/src/tint/lang/hlsl/BUILD.cmake
+++ b/src/tint/lang/hlsl/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/hlsl/validate/BUILD.cmake)
diff --git a/src/tint/lang/hlsl/BUILD.gn b/src/tint/lang/hlsl/BUILD.gn
index d8cef06..b8a448e 100644
--- a/src/tint/lang/hlsl/BUILD.gn
+++ b/src/tint/lang/hlsl/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/hlsl/validate/BUILD.cmake b/src/tint/lang/hlsl/validate/BUILD.cmake
index b4fd065..a05662b 100644
--- a/src/tint/lang/hlsl/validate/BUILD.cmake
+++ b/src/tint/lang/hlsl/validate/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_HLSL_WRITER)
diff --git a/src/tint/lang/hlsl/validate/BUILD.gn b/src/tint/lang/hlsl/validate/BUILD.gn
index 5ef229d..0516419 100644
--- a/src/tint/lang/hlsl/validate/BUILD.gn
+++ b/src/tint/lang/hlsl/validate/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/hlsl/writer/BUILD.cmake b/src/tint/lang/hlsl/writer/BUILD.cmake
index 613fba2..f82c2ea 100644
--- a/src/tint/lang/hlsl/writer/BUILD.cmake
+++ b/src/tint/lang/hlsl/writer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/hlsl/writer/ast_printer/BUILD.cmake)
diff --git a/src/tint/lang/hlsl/writer/BUILD.gn b/src/tint/lang/hlsl/writer/BUILD.gn
index 2da7ed1..c0435f6 100644
--- a/src/tint/lang/hlsl/writer/BUILD.gn
+++ b/src/tint/lang/hlsl/writer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/hlsl/writer/ast_printer/BUILD.cmake b/src/tint/lang/hlsl/writer/ast_printer/BUILD.cmake
index 4a3b466..8a43885 100644
--- a/src/tint/lang/hlsl/writer/ast_printer/BUILD.cmake
+++ b/src/tint/lang/hlsl/writer/ast_printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_HLSL_WRITER)
diff --git a/src/tint/lang/hlsl/writer/ast_printer/BUILD.gn b/src/tint/lang/hlsl/writer/ast_printer/BUILD.gn
index 2cff88b..88e7e42 100644
--- a/src/tint/lang/hlsl/writer/ast_printer/BUILD.gn
+++ b/src/tint/lang/hlsl/writer/ast_printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/hlsl/writer/common/BUILD.cmake b/src/tint/lang/hlsl/writer/common/BUILD.cmake
index 5304c77..57fa469 100644
--- a/src/tint/lang/hlsl/writer/common/BUILD.cmake
+++ b/src/tint/lang/hlsl/writer/common/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/hlsl/writer/common/BUILD.gn b/src/tint/lang/hlsl/writer/common/BUILD.gn
index 6be0ae4..6aacb42 100644
--- a/src/tint/lang/hlsl/writer/common/BUILD.gn
+++ b/src/tint/lang/hlsl/writer/common/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/BUILD.cmake b/src/tint/lang/msl/BUILD.cmake
index b08b8ee..2191380 100644
--- a/src/tint/lang/msl/BUILD.cmake
+++ b/src/tint/lang/msl/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/msl/validate/BUILD.cmake)
diff --git a/src/tint/lang/msl/BUILD.gn b/src/tint/lang/msl/BUILD.gn
index d8cef06..b8a448e 100644
--- a/src/tint/lang/msl/BUILD.gn
+++ b/src/tint/lang/msl/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/validate/BUILD.cmake b/src/tint/lang/msl/validate/BUILD.cmake
index 03f1c75..9f3c0a5 100644
--- a/src/tint/lang/msl/validate/BUILD.cmake
+++ b/src/tint/lang/msl/validate/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_MSL_WRITER)
diff --git a/src/tint/lang/msl/validate/BUILD.gn b/src/tint/lang/msl/validate/BUILD.gn
index e0c8039..6408a5f 100644
--- a/src/tint/lang/msl/validate/BUILD.gn
+++ b/src/tint/lang/msl/validate/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/writer/BUILD.cmake b/src/tint/lang/msl/writer/BUILD.cmake
index f7cd382..6ddd2cb 100644
--- a/src/tint/lang/msl/writer/BUILD.cmake
+++ b/src/tint/lang/msl/writer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/msl/writer/ast_printer/BUILD.cmake)
diff --git a/src/tint/lang/msl/writer/BUILD.gn b/src/tint/lang/msl/writer/BUILD.gn
index adb5332..f05d114 100644
--- a/src/tint/lang/msl/writer/BUILD.gn
+++ b/src/tint/lang/msl/writer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/writer/ast_printer/BUILD.cmake b/src/tint/lang/msl/writer/ast_printer/BUILD.cmake
index 42b6ab1..afce85a 100644
--- a/src/tint/lang/msl/writer/ast_printer/BUILD.cmake
+++ b/src/tint/lang/msl/writer/ast_printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_MSL_WRITER)
diff --git a/src/tint/lang/msl/writer/ast_printer/BUILD.gn b/src/tint/lang/msl/writer/ast_printer/BUILD.gn
index 5c6fba3..dfa139a 100644
--- a/src/tint/lang/msl/writer/ast_printer/BUILD.gn
+++ b/src/tint/lang/msl/writer/ast_printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/writer/common/BUILD.cmake b/src/tint/lang/msl/writer/common/BUILD.cmake
index 32ab82b..bb02f73 100644
--- a/src/tint/lang/msl/writer/common/BUILD.cmake
+++ b/src/tint/lang/msl/writer/common/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_MSL_WRITER)
diff --git a/src/tint/lang/msl/writer/common/BUILD.gn b/src/tint/lang/msl/writer/common/BUILD.gn
index b441649..8e834d8 100644
--- a/src/tint/lang/msl/writer/common/BUILD.gn
+++ b/src/tint/lang/msl/writer/common/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/writer/printer/BUILD.cmake b/src/tint/lang/msl/writer/printer/BUILD.cmake
index c899f13..1999e2a 100644
--- a/src/tint/lang/msl/writer/printer/BUILD.cmake
+++ b/src/tint/lang/msl/writer/printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_MSL_WRITER AND TINT_BUILD_IR)
diff --git a/src/tint/lang/msl/writer/printer/BUILD.gn b/src/tint/lang/msl/writer/printer/BUILD.gn
index 94851ad..79e66b4 100644
--- a/src/tint/lang/msl/writer/printer/BUILD.gn
+++ b/src/tint/lang/msl/writer/printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/msl/writer/raise/BUILD.cmake b/src/tint/lang/msl/writer/raise/BUILD.cmake
index 080c14e..86f9826 100644
--- a/src/tint/lang/msl/writer/raise/BUILD.cmake
+++ b/src/tint/lang/msl/writer/raise/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/msl/writer/raise/BUILD.gn b/src/tint/lang/msl/writer/raise/BUILD.gn
index 1108f3e..c2bcce9 100644
--- a/src/tint/lang/msl/writer/raise/BUILD.gn
+++ b/src/tint/lang/msl/writer/raise/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/BUILD.cmake b/src/tint/lang/spirv/BUILD.cmake
index 0b8158e..24b83a3 100644
--- a/src/tint/lang/spirv/BUILD.cmake
+++ b/src/tint/lang/spirv/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/spirv/reader/BUILD.cmake)
diff --git a/src/tint/lang/spirv/BUILD.gn b/src/tint/lang/spirv/BUILD.gn
index d8cef06..b8a448e 100644
--- a/src/tint/lang/spirv/BUILD.gn
+++ b/src/tint/lang/spirv/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/reader/BUILD.cmake b/src/tint/lang/spirv/reader/BUILD.cmake
index 0e4ab13..0ac253d 100644
--- a/src/tint/lang/spirv/reader/BUILD.cmake
+++ b/src/tint/lang/spirv/reader/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/spirv/reader/ast_parser/BUILD.cmake)
diff --git a/src/tint/lang/spirv/reader/BUILD.gn b/src/tint/lang/spirv/reader/BUILD.gn
index e8bca89..eeb5258 100644
--- a/src/tint/lang/spirv/reader/BUILD.gn
+++ b/src/tint/lang/spirv/reader/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/reader/ast_parser/BUILD.cmake b/src/tint/lang/spirv/reader/ast_parser/BUILD.cmake
index e8d9c3f..ae9cb5e 100644
--- a/src/tint/lang/spirv/reader/ast_parser/BUILD.cmake
+++ b/src/tint/lang/spirv/reader/ast_parser/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_SPV_READER)
diff --git a/src/tint/lang/spirv/reader/ast_parser/BUILD.gn b/src/tint/lang/spirv/reader/ast_parser/BUILD.gn
index ea640f2..54163d6 100644
--- a/src/tint/lang/spirv/reader/ast_parser/BUILD.gn
+++ b/src/tint/lang/spirv/reader/ast_parser/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/reader/common/BUILD.cmake b/src/tint/lang/spirv/reader/common/BUILD.cmake
index 6d8e6c0..2d11c17 100644
--- a/src/tint/lang/spirv/reader/common/BUILD.cmake
+++ b/src/tint/lang/spirv/reader/common/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/spirv/reader/common/BUILD.gn b/src/tint/lang/spirv/reader/common/BUILD.gn
index 2f2b528..26c1566 100644
--- a/src/tint/lang/spirv/reader/common/BUILD.gn
+++ b/src/tint/lang/spirv/reader/common/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/writer/BUILD.cmake b/src/tint/lang/spirv/writer/BUILD.cmake
index 3bd4ed8..26d0fec 100644
--- a/src/tint/lang/spirv/writer/BUILD.cmake
+++ b/src/tint/lang/spirv/writer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/spirv/writer/ast_printer/BUILD.cmake)
diff --git a/src/tint/lang/spirv/writer/BUILD.gn b/src/tint/lang/spirv/writer/BUILD.gn
index 1e1a21a..b280bc0 100644
--- a/src/tint/lang/spirv/writer/BUILD.gn
+++ b/src/tint/lang/spirv/writer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/writer/ast_printer/BUILD.cmake b/src/tint/lang/spirv/writer/ast_printer/BUILD.cmake
index 8c116ed..acaaf78 100644
--- a/src/tint/lang/spirv/writer/ast_printer/BUILD.cmake
+++ b/src/tint/lang/spirv/writer/ast_printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_SPV_WRITER)
diff --git a/src/tint/lang/spirv/writer/ast_printer/BUILD.gn b/src/tint/lang/spirv/writer/ast_printer/BUILD.gn
index fa5fd93..1243e2b 100644
--- a/src/tint/lang/spirv/writer/ast_printer/BUILD.gn
+++ b/src/tint/lang/spirv/writer/ast_printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/writer/common/BUILD.cmake b/src/tint/lang/spirv/writer/common/BUILD.cmake
index c92ed15..de89ec2 100644
--- a/src/tint/lang/spirv/writer/common/BUILD.cmake
+++ b/src/tint/lang/spirv/writer/common/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_SPV_WRITER)
diff --git a/src/tint/lang/spirv/writer/common/BUILD.gn b/src/tint/lang/spirv/writer/common/BUILD.gn
index 2dd5122..0d00bd5 100644
--- a/src/tint/lang/spirv/writer/common/BUILD.gn
+++ b/src/tint/lang/spirv/writer/common/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/writer/printer/BUILD.cmake b/src/tint/lang/spirv/writer/printer/BUILD.cmake
index 72ab825..fc7ac77 100644
--- a/src/tint/lang/spirv/writer/printer/BUILD.cmake
+++ b/src/tint/lang/spirv/writer/printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_SPV_WRITER AND TINT_BUILD_IR)
diff --git a/src/tint/lang/spirv/writer/printer/BUILD.gn b/src/tint/lang/spirv/writer/printer/BUILD.gn
index c6e95b9..d7f4df9 100644
--- a/src/tint/lang/spirv/writer/printer/BUILD.gn
+++ b/src/tint/lang/spirv/writer/printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/spirv/writer/raise/BUILD.cmake b/src/tint/lang/spirv/writer/raise/BUILD.cmake
index a7052a1..f5d7856 100644
--- a/src/tint/lang/spirv/writer/raise/BUILD.cmake
+++ b/src/tint/lang/spirv/writer/raise/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_SPV_WRITER AND TINT_BUILD_IR)
diff --git a/src/tint/lang/spirv/writer/raise/BUILD.gn b/src/tint/lang/spirv/writer/raise/BUILD.gn
index c47822e..1e3296d 100644
--- a/src/tint/lang/spirv/writer/raise/BUILD.gn
+++ b/src/tint/lang/spirv/writer/raise/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/BUILD.cmake b/src/tint/lang/wgsl/BUILD.cmake
index e7d0dc1..90ce7f7 100644
--- a/src/tint/lang/wgsl/BUILD.cmake
+++ b/src/tint/lang/wgsl/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/wgsl/ast/BUILD.cmake)
diff --git a/src/tint/lang/wgsl/BUILD.gn b/src/tint/lang/wgsl/BUILD.gn
index 48b3c7a..922f8e8 100644
--- a/src/tint/lang/wgsl/BUILD.gn
+++ b/src/tint/lang/wgsl/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/ast/BUILD.cmake b/src/tint/lang/wgsl/ast/BUILD.cmake
index f44a041..3a06809 100644
--- a/src/tint/lang/wgsl/ast/BUILD.cmake
+++ b/src/tint/lang/wgsl/ast/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/wgsl/ast/transform/BUILD.cmake)
diff --git a/src/tint/lang/wgsl/ast/BUILD.gn b/src/tint/lang/wgsl/ast/BUILD.gn
index 47ee72f..d74d107 100644
--- a/src/tint/lang/wgsl/ast/BUILD.gn
+++ b/src/tint/lang/wgsl/ast/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/ast/transform/BUILD.cmake b/src/tint/lang/wgsl/ast/transform/BUILD.cmake
index d91332e..21e7fa3 100644
--- a/src/tint/lang/wgsl/ast/transform/BUILD.cmake
+++ b/src/tint/lang/wgsl/ast/transform/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/ast/transform/BUILD.gn b/src/tint/lang/wgsl/ast/transform/BUILD.gn
index c55205d..3f325ce 100644
--- a/src/tint/lang/wgsl/ast/transform/BUILD.gn
+++ b/src/tint/lang/wgsl/ast/transform/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/helpers/BUILD.cmake b/src/tint/lang/wgsl/helpers/BUILD.cmake
index 048427b..0c6b82f 100644
--- a/src/tint/lang/wgsl/helpers/BUILD.cmake
+++ b/src/tint/lang/wgsl/helpers/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/helpers/BUILD.gn b/src/tint/lang/wgsl/helpers/BUILD.gn
index 9836e13..0ebfb1f 100644
--- a/src/tint/lang/wgsl/helpers/BUILD.gn
+++ b/src/tint/lang/wgsl/helpers/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/inspector/BUILD.cmake b/src/tint/lang/wgsl/inspector/BUILD.cmake
index 2e4ea3d..e5b36a0 100644
--- a/src/tint/lang/wgsl/inspector/BUILD.cmake
+++ b/src/tint/lang/wgsl/inspector/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/inspector/BUILD.gn b/src/tint/lang/wgsl/inspector/BUILD.gn
index 472f757..5fea9d0 100644
--- a/src/tint/lang/wgsl/inspector/BUILD.gn
+++ b/src/tint/lang/wgsl/inspector/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/program/BUILD.cmake b/src/tint/lang/wgsl/program/BUILD.cmake
index eac1123..bae5dda 100644
--- a/src/tint/lang/wgsl/program/BUILD.cmake
+++ b/src/tint/lang/wgsl/program/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/program/BUILD.gn b/src/tint/lang/wgsl/program/BUILD.gn
index 550397b..784b43c 100644
--- a/src/tint/lang/wgsl/program/BUILD.gn
+++ b/src/tint/lang/wgsl/program/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/reader/BUILD.cmake b/src/tint/lang/wgsl/reader/BUILD.cmake
index 02401cf..2c84e0b 100644
--- a/src/tint/lang/wgsl/reader/BUILD.cmake
+++ b/src/tint/lang/wgsl/reader/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/wgsl/reader/parser/BUILD.cmake)
diff --git a/src/tint/lang/wgsl/reader/BUILD.gn b/src/tint/lang/wgsl/reader/BUILD.gn
index 1de5c0d..e26cd97 100644
--- a/src/tint/lang/wgsl/reader/BUILD.gn
+++ b/src/tint/lang/wgsl/reader/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/reader/parser/BUILD.cmake b/src/tint/lang/wgsl/reader/parser/BUILD.cmake
index d201571..e53c99c 100644
--- a/src/tint/lang/wgsl/reader/parser/BUILD.cmake
+++ b/src/tint/lang/wgsl/reader/parser/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/reader/parser/BUILD.gn b/src/tint/lang/wgsl/reader/parser/BUILD.gn
index b7a6ca9..36c9f43 100644
--- a/src/tint/lang/wgsl/reader/parser/BUILD.gn
+++ b/src/tint/lang/wgsl/reader/parser/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/reader/program_to_ir/BUILD.cmake b/src/tint/lang/wgsl/reader/program_to_ir/BUILD.cmake
index 38e81e1..28e5889 100644
--- a/src/tint/lang/wgsl/reader/program_to_ir/BUILD.cmake
+++ b/src/tint/lang/wgsl/reader/program_to_ir/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_IR)
diff --git a/src/tint/lang/wgsl/reader/program_to_ir/BUILD.gn b/src/tint/lang/wgsl/reader/program_to_ir/BUILD.gn
index 54696df..f4eb7f4 100644
--- a/src/tint/lang/wgsl/reader/program_to_ir/BUILD.gn
+++ b/src/tint/lang/wgsl/reader/program_to_ir/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/resolver/BUILD.cmake b/src/tint/lang/wgsl/resolver/BUILD.cmake
index 1e09e9f..6f0a3d3 100644
--- a/src/tint/lang/wgsl/resolver/BUILD.cmake
+++ b/src/tint/lang/wgsl/resolver/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/resolver/BUILD.gn b/src/tint/lang/wgsl/resolver/BUILD.gn
index 01da15a..2e40118 100644
--- a/src/tint/lang/wgsl/resolver/BUILD.gn
+++ b/src/tint/lang/wgsl/resolver/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/sem/BUILD.cmake b/src/tint/lang/wgsl/sem/BUILD.cmake
index ecd7e85..11238c5 100644
--- a/src/tint/lang/wgsl/sem/BUILD.cmake
+++ b/src/tint/lang/wgsl/sem/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/sem/BUILD.gn b/src/tint/lang/wgsl/sem/BUILD.gn
index 7d8d66b..ae039c1 100644
--- a/src/tint/lang/wgsl/sem/BUILD.gn
+++ b/src/tint/lang/wgsl/sem/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/writer/BUILD.cmake b/src/tint/lang/wgsl/writer/BUILD.cmake
index 53ee652..0fdab06 100644
--- a/src/tint/lang/wgsl/writer/BUILD.cmake
+++ b/src/tint/lang/wgsl/writer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 include(lang/wgsl/writer/ast_printer/BUILD.cmake)
diff --git a/src/tint/lang/wgsl/writer/BUILD.gn b/src/tint/lang/wgsl/writer/BUILD.gn
index 230167b..cb47dbc 100644
--- a/src/tint/lang/wgsl/writer/BUILD.gn
+++ b/src/tint/lang/wgsl/writer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/writer/ast_printer/BUILD.cmake b/src/tint/lang/wgsl/writer/ast_printer/BUILD.cmake
index fd4338f..8004d94 100644
--- a/src/tint/lang/wgsl/writer/ast_printer/BUILD.cmake
+++ b/src/tint/lang/wgsl/writer/ast_printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/writer/ast_printer/BUILD.gn b/src/tint/lang/wgsl/writer/ast_printer/BUILD.gn
index 62341ae..7e2c123 100644
--- a/src/tint/lang/wgsl/writer/ast_printer/BUILD.gn
+++ b/src/tint/lang/wgsl/writer/ast_printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/writer/ir_to_program/BUILD.cmake b/src/tint/lang/wgsl/writer/ir_to_program/BUILD.cmake
index 426214e..ef8b494 100644
--- a/src/tint/lang/wgsl/writer/ir_to_program/BUILD.cmake
+++ b/src/tint/lang/wgsl/writer/ir_to_program/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 if(TINT_BUILD_IR)
diff --git a/src/tint/lang/wgsl/writer/ir_to_program/BUILD.gn b/src/tint/lang/wgsl/writer/ir_to_program/BUILD.gn
index 04785fc..e19abe9 100644
--- a/src/tint/lang/wgsl/writer/ir_to_program/BUILD.gn
+++ b/src/tint/lang/wgsl/writer/ir_to_program/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")
diff --git a/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.cmake b/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.cmake
index 44ec253..0a46c6e 100644
--- a/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.cmake
+++ b/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.cmake
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.cmake.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 ################################################################################
diff --git a/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.gn b/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.gn
index f391618..0b604d8 100644
--- a/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.gn
+++ b/src/tint/lang/wgsl/writer/syntax_tree_printer/BUILD.gn
@@ -13,11 +13,12 @@
 # limitations under the License.
 
 ################################################################################
-# File generated by tools/src/cmd/gen
-# using the template:
+# File generated by 'tools/src/cmd/gen' using the template:
 #   tools/src/cmd/gen/build/BUILD.gn.tmpl
 #
-# Do not modify this file directly
+# To regenerate run: './tools/run gen'
+#
+#                       Do not modify this file directly
 ################################################################################
 
 import("../../../../../../scripts/tint_overrides_with_defaults.gni")