@@ -0,0 +1,109 @@
+package watcher
+
+import (
+	"fmt"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"slices"
+
+	"github.com/fsnotify/fsnotify"
+)
+
+type Event fsnotify.Event
+
+type Watcher interface {
+	AddRecursive(pathname string) error
+	Monitor() (<-chan Event, <-chan error)
+	WatchList() []string
+	Remove(pathname string) error
+	Close() error
+}
+
+// FSWatcher implements the Watcher interface using fsnotify.
+type FSWatcher struct {
+	watcher fsnotify.Watcher
+}
+
+var IgnoredDirs = []string{
+	".git",
+}
+
+func New() (*FSWatcher, error) {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create watcher: %v", err)
+	}
+
+	return &FSWatcher{
+		watcher: *watcher,
+	}, nil
+}
+
+func (w *FSWatcher) AddRecursive(pathname string) error {
+	stat, err := os.Stat(pathname)
+	if err != nil {
+		return fmt.Errorf("failed to stat %s: %v", pathname, err)
+	}
+	if !stat.IsDir() {
+		pathname = filepath.Dir(pathname)
+	}
+
+	return w.addDirRecursive(pathname)
+}
+
+func (w *FSWatcher) Remove(pathname string) error {
+	return w.watcher.Remove(pathname)
+}
+
+func (w *FSWatcher) Monitor() (<-chan Event, <-chan error) {
+	events := make(chan Event, 1)
+	errors := make(chan error, 1)
+
+	go func() {
+		for {
+			select {
+			case event := <-w.watcher.Events:
+				events <- Event(event)
+			case err := <-w.watcher.Errors:
+				errors <- err
+			}
+		}
+	}()
+
+	return events, errors
+}
+
+func (w *FSWatcher) WatchList() []string {
+	return w.watcher.WatchList()
+}
+
+func (w *FSWatcher) Close() error {
+	return w.watcher.Close()
+}
+
+func (w *FSWatcher) addDirRecursive(dir string) error {
+	err := filepath.Walk(dir, func(path string, entry fs.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if entry.IsDir() {
+			if slices.Contains(IgnoredDirs, entry.Name()) {
+				return fs.SkipDir
+			}
+
+			err = w.watcher.Add(path)
+			if err != nil {
+				return fmt.Errorf("failed to add directory to watcher: %v", err)
+			}
+		}
+
+		return nil
+	})
+	if err != nil {
+		return fmt.Errorf("failed to walk directory: %v", err)
+	}
+
+	return nil
+}