currently helm diff doesn't do any diff for chart hooks. This can be checked by parsing release hook https://godoc.org/k8s.io/helm/pkg/proto/hapi/release#Release and getting its manifest https://godoc.org/k8s.io/helm/pkg/proto/hapi/release#Hook I can have a PR up since with an old release of helm-diff I had something working. Just need to update to latest helm-diff.