diff --git a/ports/reaction/portfile.cmake b/ports/reaction/portfile.cmake
new file mode 100644
index 0000000000..a7b0f6f674
--- /dev/null
+++ b/ports/reaction/portfile.cmake
@@ -0,0 +1,26 @@
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO lumia431/reaction
+    REF "${VERSION}"
+    SHA512 7747b621c790318d3240f8634bf2310420c93b1418f9ac1384d784ab08658f12d2631e59d5927dc2b81c7801d150a785ea1cdfbb0b7025ea0531047023f8dab1
+    HEAD_REF master
+)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS
+        -DBUILD_EXAMPLES=OFF
+        -DBUILD_TESTS=OFF
+        -DBUILD_BENCHMARKS=OFF
+)
+
+vcpkg_cmake_install()
+vcpkg_cmake_config_fixup(CONFIG_PATH lib/cmake/reaction)
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE")
+file(INSTALL "${CMAKE_CURRENT_LIST_DIR}/usage" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}")
+
+file(REMOVE_RECURSE
+    "${CURRENT_PACKAGES_DIR}/debug"
+    "${CURRENT_PACKAGES_DIR}/lib"
+)
+
diff --git a/ports/reaction/usage b/ports/reaction/usage
new file mode 100644
index 0000000000..9ef9045738
--- /dev/null
+++ b/ports/reaction/usage
@@ -0,0 +1,4 @@
+reaction is a header-only library that provides CMake targets:
+
+  find_package(reaction CONFIG REQUIRED)
+  target_link_libraries(main PRIVATE reaction::reaction)
diff --git a/ports/reaction/vcpkg.json b/ports/reaction/vcpkg.json
new file mode 100644
index 0000000000..496a8dada5
--- /dev/null
+++ b/ports/reaction/vcpkg.json
@@ -0,0 +1,17 @@
+{
+  "name": "reaction",
+  "version": "1.0.0",
+  "description": "A lightweight, header-only, high-performance reactive programming framework for C++20",
+  "homepage": "https://github.com/lumia431/reaction",
+  "license": "MIT",
+  "dependencies": [
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ]
+}
diff --git a/versions/baseline.json b/versions/baseline.json
index edf9a24615..184c13fda4 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -8312,6 +8312,10 @@
       "baseline": "2025-08-12",
       "port-version": 0
     },
+    "reaction": {
+      "baseline": "1.0.0",
+      "port-version": 0
+    },
     "reactiveplusplus": {
       "baseline": "2.1.1",
       "port-version": 0
diff --git a/versions/r-/reaction.json b/versions/r-/reaction.json
new file mode 100644
index 0000000000..aed733d861
--- /dev/null
+++ b/versions/r-/reaction.json
@@ -0,0 +1,9 @@
+{
+  "versions": [
+    {
+      "git-tree": "db46571080109d8ff5e35597158e1da1d03eb0ba",
+      "version": "1.0.0",
+      "port-version": 0
+    }
+  ]
+}