Most of the examples use context.TODO() on each call into the client. Would be nice to have a better explanation of what this is for.

And someday it would be cool to add a .Context field on the reconcile.Request for controllers (and maybe something similar for webhooks, though that's harder), and have the controller machinery create a context.Background() at the start of a request so you can thread it down into calls to the client library and whatnot.