Patch rendered manifests

I'd like to be able to patch the manifests that skaffold generates after skaffold has applied all changes.

Concrete use case: when I use skaffold to remotely debug a go application, skaffold will modify my deployment manifest by adding an init container for the go debugger. In my setup, I need to add certain fields to the init container for security reasons.

Or am I missing something and this is already possible?