- Fix hanging background processes on Sierra 111 - Remove stale lockfiles 110 - Add [session IDs and session-scoped caching](http://www.deanishe.net/alfred-workflow/guide/persistent-data.html#session-scoped-cache)
1.24
Log level now defaults to INFO if Alfred's debugger is closed and DEBUG if it's open
1.23.1
- Top-level (i.e. `Workflow.setvar()`) variables - New `rerun` feature introduced in Alfred 3.
`rerun` tells Alfred to run your Script Filter again after the specified number of seconds. The new top-level variables are passed to the Script Filter when it's run again.
1.22
Thanks to 105 by idpaterson, you can now force error messages (when `Workflow.run()` catches an exception) to be in plaintext, rather than Alfred's XML/JSON feedback format.
This is useful when your script isn't running in a Script Filter and you'd like to show the error message in a notification.
1.21.1
This release has no new features, but removes a couple of potential errors.
**Note:** The signature of `workflow.update.install_update()` has changed. It no longer takes any arguments, as they weren't used anyway.
If you were calling this function directly, which is unlikely, you will need to update your workflow(s).
1.21
The `quicklookurl` feature is now supported in both `Workflow` and `Workflow3` classes.