Sanity Library Reference Docs
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    ResourceAliases: Record<string, WorkflowResource>

    A map binding each resource-alias name to the physical WorkflowResource it resolves to at deploy. Parallels the role-alias map: where role aliases map a role to its fulfillers, resource aliases map a logical content reference (@<alias>:<id>) to a physical resource. Swapping the map is how the same source definitions deploy to different environments.