Creates a Channel

Custom fields (FieldName plus a human-facing Description) that become mandatory when creating a release in this channel.

Rules restricting which Git refs may be used for external Git dependencies referenced by deployment steps. Each rule targets step Git dependencies via GitDependencyActions (DeploymentActionSlug plus GitDependencyName) and lists the allowed Git reference patterns in Rules.

Version rules restricting which package versions may be used when creating a release in this channel. Each rule targets step packages via ActionPackages (DeploymentAction is the step name or ID, PackageReference the package reference name or ID) and constrains versions with a NuGet-style VersionRange (e.g. '[1.0,2.0)') and/or a Tag regex matched against the package's pre-release tag (e.g. '^$' for stable versions only). Leave each rule's Id blank; the server assigns it.