whats the best practice if i like to split my pulumi.run program body to smaller/separate functions/files?

You can just split it into different function and pass the

pulumi.Context

as a parameter. You might also want to look at component resources.

passing the context is fine, however sometimes i need to pass few more parameters too. i will look into that, thanks.

Don't overthink it too much, it's pretty much just like you'd write any other normal Go program.

sure, thanks