Ask HN: Would you use a cold email tool that's configurable via code?

I'm exploring an idea for developers and technical founders: a cold email tool where you define your cold email campaigns using YAML or a Terraform-style config. No clunky UI. Just version your campaigns in Git, run them from the CLI, and get metrics via terminal or API. Something like this: campaign: outreach sender: me@domain.com audience: leads.csv sequence: - delay: 0 subject: "Hey {{first_name}}" body: "..." - delay: 3d subject: "Just checking in" body: "..." It would also handle things like inbox rotation, warmup, sending limits, and unsubscribe logic. Would love to know: * Would you use this? * What features would be essential for you? * Any similar tools you already like? * Any gotchas you see? Thanks!