diff --git a/.github/actions/remote_cache/action.yml b/.github/actions/remote_cache/action.yml
index 3f8fe862a3..9bf44716bb 100644
--- a/.github/actions/remote_cache/action.yml
+++ b/.github/actions/remote_cache/action.yml
@@ -7,7 +7,7 @@ inputs:
   enable:
     description: "Enable auth (and caching)"
     # By default, secrets are not passed to workflows triggered from forks, including Dependabot.
-    default: ${{ !github.event.pull_request.head.repo.fork }}
+    default: false
   set_cmake_sccache_launcher:
     default: false
   set_home_bazelrc:
diff --git a/.github/workflows/aarch64_toolchain.yml b/.github/workflows/aarch64_toolchain.yml
index d4c7746215..6494f8e566 100644
--- a/.github/workflows/aarch64_toolchain.yml
+++ b/.github/workflows/aarch64_toolchain.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_docker_bazel.yml b/.github/workflows/amd64_docker_bazel.yml
index 3e7be6147e..ca33b90511 100644
--- a/.github/workflows/amd64_docker_bazel.yml
+++ b/.github/workflows/amd64_docker_bazel.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_docker_cmake.yml b/.github/workflows/amd64_docker_cmake.yml
index 69d5fdcb29..aaf6ba2912 100644
--- a/.github/workflows/amd64_docker_cmake.yml
+++ b/.github/workflows/amd64_docker_cmake.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_bazel.yml b/.github/workflows/amd64_linux_bazel.yml
index ee1eb52820..9d754647e3 100644
--- a/.github/workflows/amd64_linux_bazel.yml
+++ b/.github/workflows/amd64_linux_bazel.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_coinor_off.yml b/.github/workflows/amd64_linux_cmake_coinor_off.yml
index d1b54701b4..42410eb82d 100644
--- a/.github/workflows/amd64_linux_cmake_coinor_off.yml
+++ b/.github/workflows/amd64_linux_cmake_coinor_off.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_cpp.yml b/.github/workflows/amd64_linux_cmake_cpp.yml
index 137c819584..33d7016419 100644
--- a/.github/workflows/amd64_linux_cmake_cpp.yml
+++ b/.github/workflows/amd64_linux_cmake_cpp.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_dotnet.yml b/.github/workflows/amd64_linux_cmake_dotnet.yml
index bfad21de7b..26b3626505 100644
--- a/.github/workflows/amd64_linux_cmake_dotnet.yml
+++ b/.github/workflows/amd64_linux_cmake_dotnet.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_glpk_on.yml b/.github/workflows/amd64_linux_cmake_glpk_on.yml
index e18ef05457..9aa78c2658 100644
--- a/.github/workflows/amd64_linux_cmake_glpk_on.yml
+++ b/.github/workflows/amd64_linux_cmake_glpk_on.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_java.yml b/.github/workflows/amd64_linux_cmake_java.yml
index 3e6c734445..54e460177e 100644
--- a/.github/workflows/amd64_linux_cmake_java.yml
+++ b/.github/workflows/amd64_linux_cmake_java.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_python.yml b/.github/workflows/amd64_linux_cmake_python.yml
index 6d7736c707..f631c36a3c 100644
--- a/.github/workflows/amd64_linux_cmake_python.yml
+++ b/.github/workflows/amd64_linux_cmake_python.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_scip_off.yml b/.github/workflows/amd64_linux_cmake_scip_off.yml
index 23b8eacdf6..7a76b8f38d 100644
--- a/.github/workflows/amd64_linux_cmake_scip_off.yml
+++ b/.github/workflows/amd64_linux_cmake_scip_off.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_linux_cmake_system_deps.yml b/.github/workflows/amd64_linux_cmake_system_deps.yml
index 319b717896..4e52a4f7fe 100644
--- a/.github/workflows/amd64_linux_cmake_system_deps.yml
+++ b/.github/workflows/amd64_linux_cmake_system_deps.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_macos_bazel.yml b/.github/workflows/amd64_macos_bazel.yml
index 49573b3a49..99eb48a768 100644
--- a/.github/workflows/amd64_macos_bazel.yml
+++ b/.github/workflows/amd64_macos_bazel.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_macos_cmake_cpp.yml b/.github/workflows/amd64_macos_cmake_cpp.yml
index 29d4c96d4e..8ce8f267f2 100644
--- a/.github/workflows/amd64_macos_cmake_cpp.yml
+++ b/.github/workflows/amd64_macos_cmake_cpp.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_macos_cmake_dotnet.yml b/.github/workflows/amd64_macos_cmake_dotnet.yml
index 1c55037fc1..0c3d49bd35 100644
--- a/.github/workflows/amd64_macos_cmake_dotnet.yml
+++ b/.github/workflows/amd64_macos_cmake_dotnet.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_macos_cmake_java.yml b/.github/workflows/amd64_macos_cmake_java.yml
index c994750d96..993e2d170f 100644
--- a/.github/workflows/amd64_macos_cmake_java.yml
+++ b/.github/workflows/amd64_macos_cmake_java.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_macos_cmake_python.yml b/.github/workflows/amd64_macos_cmake_python.yml
index 8d4e5a626e..6ee1f478e3 100644
--- a/.github/workflows/amd64_macos_cmake_python.yml
+++ b/.github/workflows/amd64_macos_cmake_python.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_web.yml b/.github/workflows/amd64_web.yml
index f259f1e6cc..06010204a3 100644
--- a/.github/workflows/amd64_web.yml
+++ b/.github/workflows/amd64_web.yml
@@ -7,6 +7,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_windows_bazel.yml b/.github/workflows/amd64_windows_bazel.yml
index 584f1dca17..19e193380f 100644
--- a/.github/workflows/amd64_windows_bazel.yml
+++ b/.github/workflows/amd64_windows_bazel.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_windows_cmake_cpp.yml b/.github/workflows/amd64_windows_cmake_cpp.yml
index 9d7f551c98..fc77bf839e 100644
--- a/.github/workflows/amd64_windows_cmake_cpp.yml
+++ b/.github/workflows/amd64_windows_cmake_cpp.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_windows_cmake_dotnet.yml b/.github/workflows/amd64_windows_cmake_dotnet.yml
index b9f6fd4026..5f88d8d343 100644
--- a/.github/workflows/amd64_windows_cmake_dotnet.yml
+++ b/.github/workflows/amd64_windows_cmake_dotnet.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_windows_cmake_java.yml b/.github/workflows/amd64_windows_cmake_java.yml
index 6d54b11691..6dfa0493a5 100644
--- a/.github/workflows/amd64_windows_cmake_java.yml
+++ b/.github/workflows/amd64_windows_cmake_java.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/amd64_windows_cmake_python.yml b/.github/workflows/amd64_windows_cmake_python.yml
index 9cf75a05c7..7f0ec384cc 100644
--- a/.github/workflows/amd64_windows_cmake_python.yml
+++ b/.github/workflows/amd64_windows_cmake_python.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/arm64_macos_bazel.yml b/.github/workflows/arm64_macos_bazel.yml
index 36a10edbed..ffcca5ccf2 100644
--- a/.github/workflows/arm64_macos_bazel.yml
+++ b/.github/workflows/arm64_macos_bazel.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/arm64_macos_cmake_cpp.yml b/.github/workflows/arm64_macos_cmake_cpp.yml
index 12dc2c3692..b6214ac330 100644
--- a/.github/workflows/arm64_macos_cmake_cpp.yml
+++ b/.github/workflows/arm64_macos_cmake_cpp.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/arm64_macos_cmake_dotnet.yml b/.github/workflows/arm64_macos_cmake_dotnet.yml
index ae2ab781f7..0e2e1f6315 100644
--- a/.github/workflows/arm64_macos_cmake_dotnet.yml
+++ b/.github/workflows/arm64_macos_cmake_dotnet.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/arm64_macos_cmake_java.yml b/.github/workflows/arm64_macos_cmake_java.yml
index 30971dd647..a9235de8ec 100644
--- a/.github/workflows/arm64_macos_cmake_java.yml
+++ b/.github/workflows/arm64_macos_cmake_java.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/arm64_macos_cmake_python.yml b/.github/workflows/arm64_macos_cmake_python.yml
index 934ada3146..a494438882 100644
--- a/.github/workflows/arm64_macos_cmake_python.yml
+++ b/.github/workflows/arm64_macos_cmake_python.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/check_format.yml b/.github/workflows/check_format.yml
index 6deb565e78..2bed6901c3 100644
--- a/.github/workflows/check_format.yml
+++ b/.github/workflows/check_format.yml
@@ -5,6 +5,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/mips_toolchain.yml b/.github/workflows/mips_toolchain.yml
index ea232a6388..6efba3c9e2 100644
--- a/.github/workflows/mips_toolchain.yml
+++ b/.github/workflows/mips_toolchain.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/.github/workflows/powerpc_toolchain.yml b/.github/workflows/powerpc_toolchain.yml
index 09d616464d..5d95ab0705 100644
--- a/.github/workflows/powerpc_toolchain.yml
+++ b/.github/workflows/powerpc_toolchain.yml
@@ -6,6 +6,9 @@ on:
     branches:
       - ci
       - main
+  pull_request:
+    branches:
+      - main
   workflow_dispatch:
 
 concurrency:
diff --git a/ortools/base/log_severity.h b/ortools/base/log_severity.h
index a760e20594..fec62f529c 100644
--- a/ortools/base/log_severity.h
+++ b/ortools/base/log_severity.h
@@ -17,9 +17,9 @@
 #include "absl/base/log_severity.h"
 
 #ifndef NDEBUG
-const bool DEBUG_MODE = true;
+constexpr bool DEBUG_MODE = true;
 #else
-const bool DEBUG_MODE = false;
+constexpr bool DEBUG_MODE = false;
 #endif
 
 #endif  // ORTOOLS_BASE_LOG_SEVERITY_H_