Testing language extension locally? No option in language selector.

[spaceunifyfifty]

I submitted a PR to the kotlin language extension that was merged zed-extensions/kotlin@e175918

I am now trying to test the updated extension locally before submitting it as PR to the main zed-industries/extensions repository.

1. I uninstall the Kotlin extension
2. I clone https://github.com/zed-extensions/zed-kotlin
3. I press Install Dev Extension in zed settings, select zed-kotlin locally and confirm that it is built.

However, when I open .kt files, there is no color syntax highlighting at all. Restarting the language server, reloading the window, and rebuilding the extension do not fix this. Also, when I click language selector I no longer see Kotlin. I only see Kotlin as an option in the language selector when installing the official Kotlin extension that is online in the marketplace already. I have tested the local development checked out to the same commit as the official extension on Zed currently is at, and the problem persists.

I assume I need to do an additional step of letting Zed know that my custom cloned dev extension is a valid language option, so I am able to select it. Where to go from here?

[osiewicz]

Hm, I can't install it as a dev extension either. Could it be due to the fact that it's using a legacy .json manifest?