Develop a Mac Finder Extension Application

I'm looking for someone to develop for me the following Finder Extension (Mac OS) Functionality: Application Startup: 1. User starts the app with one parameter indicating a folder (Path== '\Users\abc\path' and Name='abc_path') that he would like to see added to the SideBar 2. The application checks if the folder already exists in the SideBar, if it does, exit with a message. 3. If it doesn't, the application adds it there with the some custom icon (doesn't matter what, but should be a custom one). Also it adds Context Menu Handler ("Perform Action") only for that folder in the finder. 4. User Navigates Finder to the above path, and checks if the context menu has the "Perform Action" on every item in the Folder. 5. Upon choosing the "Perform Action" the application shows a message. 6. This completes the Startup part. Application Shutdown: 1. Application removes the special context menu handler for that Folder 2. Application removes above folder from the SideBar. 3. User navigates Finder to the above path, and checks that the special context menu doesn't show up anymore. 4. that completes the shutdown part. The source needs to be well written and documented and will be accepted upon code review and check if the it handles all of the above properly.