diff --git a/config/lib.json b/config/lib.json
index 160d43f2..dc792c3b 100644
--- a/config/lib.json
+++ b/config/lib.json
@@ -854,5 +854,14 @@
             "zstd.h",
             "zstd_errors.h"
         ]
+    },
+    "watcher": {
+        "source": "watcher",
+        "static-libs-unix": [
+            "libwatcher-c.a"
+        ],
+        "headers": [
+            "wtr/watcher-c.h"
+        ]
     }
 }
diff --git a/config/source.json b/config/source.json
index 2ad8ec87..57a10a4e 100644
--- a/config/source.json
+++ b/config/source.json
@@ -1070,5 +1070,14 @@
             "type": "file",
             "path": "LICENSE"
         }
+    },
+    "watcher": {
+        "type": "ghtar",
+        "repo": "e-dant/watcher",
+        "prefer-stable": true,
+        "license": {
+            "type": "file",
+            "path": "license"
+        }
     }
 }
diff --git a/src/SPC/builder/freebsd/library/watcher.php b/src/SPC/builder/freebsd/library/watcher.php
new file mode 100644
index 00000000..1a08dd24
--- /dev/null
+++ b/src/SPC/builder/freebsd/library/watcher.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\freebsd\library;
+
+class watcher extends BSDLibraryBase
+{
+    use \SPC\builder\unix\library\watcher;
+
+    public const NAME = 'watcher';
+}
diff --git a/src/SPC/builder/linux/library/watcher.php b/src/SPC/builder/linux/library/watcher.php
new file mode 100644
index 00000000..01bc114d
--- /dev/null
+++ b/src/SPC/builder/linux/library/watcher.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\linux\library;
+
+class watcher extends LinuxLibraryBase
+{
+    use \SPC\builder\unix\library\watcher;
+
+    public const NAME = 'watcher';
+}
diff --git a/src/SPC/builder/macos/library/watcher.php b/src/SPC/builder/macos/library/watcher.php
new file mode 100644
index 00000000..ef88c0ed
--- /dev/null
+++ b/src/SPC/builder/macos/library/watcher.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\macos\library;
+
+class watcher extends MacOSLibraryBase
+{
+    use \SPC\builder\unix\library\watcher;
+
+    public const NAME = 'watcher';
+}
diff --git a/src/SPC/builder/unix/library/watcher.php b/src/SPC/builder/unix/library/watcher.php
new file mode 100644
index 00000000..2463cc4f
--- /dev/null
+++ b/src/SPC/builder/unix/library/watcher.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\unix\library;
+
+use SPC\exception\FileSystemException;
+use SPC\exception\RuntimeException;
+use SPC\store\FileSystem;
+
+trait watcher
+{
+    /**
+     * @throws RuntimeException
+     * @throws FileSystemException
+     */
+    protected function build(): void
+    {
+        shell()->cd($this->source_dir . '/watcher-c')
+            ->initializeEnv($this)
+            ->exec(getenv('CC') . ' -c -o libwatcher-c.o ./src/watcher-c.cpp -I ./include -I ../include -std=c++17 -Wall -Wextra -fPIC')
+            ->exec(getenv('AR') . ' rcs libwatcher-c.a libwatcher-c.o');
+
+        copy($this->source_dir . '/watcher-c/libwatcher-c.a', BUILD_LIB_PATH . '/libwatcher-c.a');
+        FileSystem::createDir(BUILD_INCLUDE_PATH . '/wtr');
+        copy($this->source_dir . '/watcher-c/include/wtr/watcher-c.h', BUILD_INCLUDE_PATH . '/wtr/watcher-c.h');
+    }
+}