Overview
A diagnostic TypeScript CLI that checks apex A, www CNAME, and common AAAA conflicts for Netlify custom domains using parallel DoH queries across three resolvers.
The problem
Lightweight DoH CLI for Netlify custom-domain DNS diagnosis. Triple-resolver consensus, exact fix steps.
My approach
Boring, layered, modular architecture: keep the UI thin, logic pure, storage typed, and the whole thing observable.
Architecture
Tech stack
TypeScriptNode.jsDNS-over-HTTPS
Layered nodes
Layered architecture — user-facing UI on top, business logic in the middle, storage and observability on the edges.
Implementation
A diagnostic TypeScript CLI that checks apex A, www CNAME, and common AAAA conflicts for Netlify custom domains using parallel DoH queries across three resolvers.
Results
3-resolver DoH consensus for accurate diagnosis
What I learned
Write boring code, measure everything, keep the UI thin, and never be afraid to delete features that nobody uses.