I was about to post a question on how to run/debug a plugin I'm playing with for AppCode, since the default plugin run config crashes during startup.
However, since I just figured it out, I'll post it as a tip instead.
This assumes that you have the plugin project loaded in IntelliJ IDEA (Community edition or Ultimate).
1. Ensure that you have the IDEA Plugin SDK for the project set to use your AppCode installation
2. Create a Plugin run configuration for your plugin
3. Add the following to the VM parameters field for your new run configuration:
That allowed me to run my plugin from IDEA, which means you can have your plugin running in the integrated debugger instead of using the old debug-by-println method.