Is there any documentation on how to support automatic reload of applications. For instance, using FastAPI, is there a way to support running with the application --reload so that the application will automatically update itself and avoid having to shut down the application and re-start it manually?

Are you talking about running a development server with

pants run

?

Yes

You can set

restartable=True

on the file and use

pants run path/to/main.py

(run the source file, not the pex_binary target)

Thank you