> I was just looking at a small open source utility. As I was going through the code I found cases where certain arguments could be set to magic values that cause useful, but undocumented behavior. Should the developers be forced to document these options?

You were able to do that because it was open source. If a car mfr was willing to do that, it would be plenty enough for me. They shouldn't be forced to do any additional work beyond the 5 seconds it takes to type `git remote add origin github.com/honda/civic`. Then the community would have everything it needs to carry things forward.

Failing that, yes, I do think everything should be documented.

I can poke at OBD and try to interpret values. CAN bus sniffers exist.

You want to force companies to publish and maintain repositories using your preferred toolset?