Vellum

Vellum is a 4k-line Go program that turns MDX into static HTML. No JS, no hydration, no client framework. I built it because every other SSG I tried had a config file longer than my actual content. Vellum has zero config. The trade-off: you can't extend it. That's by design. Maintenance was light — I'd update a dependency every 3 months. I stopped when the Go ecosystem moved to generics and I didn't want to do the migration.