Watched Folder Sync

1. Download and install Hazel from Noodlesoft.
2. Open Hazel preferences and click + to add a watched folder.
3. Create a rule: Name matches pattern → Rename / Move / Run Script.
4. Example rule: files matching *.pdf → rename to YYYY-MM-DD-{name}.pdf.

1. Install watchman: brew install watchman
2. Create a trigger:

   watchman watch ~/Downloads
   watchman -- trigger ~/Downloads pdfs '*.pdf' -- ./rename-pdfs.sh

3. The shell script receives the new filename as an argument and can apply your naming convention.

1. Install watchdog: pip install watchdog
2. Write a simple watcher script:

   from watchdog.observers import Observer
   from watchdog.events import FileSystemEventHandler
   
   class Handler(FileSystemEventHandler):
       def on_created(self, event):
           print(f"New file: {event.src_path}")
   
   observer = Observer()
   observer.schedule(Handler(), path="~/Downloads", recursive=False)
   observer.start()

$watcher = New-Object IO.FileSystemWatcher
$watcher.Path = "$env:USERPROFILE\Downloads"
$watcher.Filter = "*.pdf"
Register-ObjectEvent $watcher Created -Action { Write-Host $Event.SourceArgs[1].FullPath }