It would be nice to be able to disable bugfixes from my mod's own code, so that you don't have to special-case my mod. Can there be an API for this?

Example: DebugifyApi#disableBugFix(String bugFix) would be called like DebugifyApi.disableBugFix("MC-147605").

Done! Will appear in the next update.

public class DebugifyIntegration implements DebugifyApi {
    @Override
    public String[] getDisabledFixes() {
        return new String[]{ "MC-147605" };
    }
}

Then in your fabric.mod.json, add it as an entrypoint for "debugify".

Please be sure to implement DebugifyApi in a completely separate class because it will not load on KnotClassLoader but through a mixin plugin. This also means you should not reference any class that can be mixined, because if you do, you prevent every other mod from mixing into that class. Be careful!