Show HN: API-first approval workflows and smart routing (SignumFlow)

Hi HN!

I built SignumFlow — an API-first engine for approval workflows + smart routing.

Most approval + e-signature tools are UI-first. SignumFlow is developer-first: you call the API, bring your own UI, and keep everything inside your product.

Highlights • Create + execute approval workflows (sequential/parallel) • Smart routing • E-signatures • Webhooks + audit log • Templates

Docs → https://docs.signumflow.com

Early build — would love feedback on the API + use cases.