Can I somehow setup / configure Fleet to work as an editor (with syntax highlighting and auto-completion) for my own custom Kotlin scripts? So I have created my own

BasicJvmScriptingHost

which is available as an artifact on Maven Central, and I want my users to have an easy / lightweight way to write scripts for it. Any suggestions?

According to this https://youtrack.jetbrains.com/issue/FL-22261/Cant-get-fleet-smart-mode-to-autoformat-my-code-nor-provide-any-autocompletion-options it seems like Fleet needs the project to be more than just a file to be able to go into “smart mode” and properly work as an IDE. This comment seems to specifically mention this. I hope I understood your comment correctly here.

So, I've found out that Fleet, pretty much in the same way as IntelliJ, supports auto-completion for custom Kotlin scripts as long as the folder you open contains a (Gradle) project that has the script definitions as a dependency. In sich a scenario you can open your *.custom.kts file and get auto-completion. See e.g. https://github.com/oss-review-toolkit/ort-config/pull/142 which adds the minimum files to get auto-completion in otherwise independent *.custom.kts files working.

Thanks for the link! Since I feel like the initial response is just gonna be the same as I got in the issue I filled, I answered with a question regarding if Amper could perhaps fill this gap here. Let’s hear what JetBrains folks think about this one.

Or at least the Fleet plugin API should have the necessary interface to implement a functionality like this. Then we could write our own convenience plugin to do this.