Enhancement Description

One-line enhancement description (can be used as a release note): Ability to mark fields as immutable in APIs with automatic verification.
Kubernetes Enhancement Proposal: (link to kubernetes/enhancements file, if none yet, link to PR): https://github.com/kubernetes/enhancements/pull/1265
Primary contact (assignee): apelisse
Responsible SIGs: sig-api-machinery
Enhancement target (which target equals to which milestone):
- Alpha release target (x.y) N/A
- Beta release target (x.y) 1.16
- Stable release target (x.y) 1.18

kubernetes / enhancements