Could be for example

--depends google_container_cluster.my_cluster --depends google_compute_address.ingress-ip

This makes sense to me – can do.

Additionally it would be nice to have a parameter to make multiple manifests from one tfk8s call / input (file/stdin) sequential - meaning that the second manifest generated from one file depends on the first, the third manifest depends on the two before, etc.

I'm not exactly sure what you mean here. Are you proposing an option that if the YAML file contains multiple resources, each resource is a dependency of the one that comes after it in the file?

Could be for example
--depends google_container_cluster.my_cluster --depends google_compute_address.ingress-ip

This makes sense to me – can do.
Thanks!

Additionally it would be nice to have a parameter to make multiple manifests from one tfk8s call / input (file/stdin) sequential - meaning that the second manifest generated from one file depends on the first, the third manifest depends on the two before, etc.

I'm not exactly sure what you mean here. Are you proposing an option that if the YAML file contains multiple resources, each resource is a dependency of the one that comes after it in the file?

The opposite order.
When multiple resources are in one yaml file then each (after the first) has a dependency on the resource before. The second has a dependency on the first, the third on the second, the fourth on the third, and so on.
(In addition to dependencies given on the commandline, which would get added to each of them)

Would make it possible from one input file for example to first create a namespace and then place objects into it, or to add a CustomResourceDefinition followed by a resource of that new type.

Gotcha. Not sure what we could call the flag. --chain-depends maybe?

I'm also not good with naming, but --chain-depends sounds usable to me.