Hi HN, I built Coral to solve a pain point I had with large gRPC/Connect projects where proto dependencies became hard to track.

It parses FileDescriptorSet from `buf build` and generates:

- Interactive React Flow graph with a neon-style dark UI - PR comments showing proto schema diffs (added/removed/modified) - Static GitHub Pages for team documentation

Available as both a CLI tool and a GitHub Action:

    buf build -o - | coral serve

Live demo: https://daisuke8000.github.io/coral/ GitHub Action: https://github.com/marketplace/actions/coral-proto-visualize...