Designing Secure Public Boundaries
A practical method for keeping public forms, analytics, and content feeds useful without turning them into privileged data paths.
Public does not mean trusted
A public route is reachable by anyone, including automated clients. Treat every request as untrusted input and keep privileged credentials behind a narrow server command. The trust boundaries note provides a compact model for locating those checks.
Make the safe path the easy path
Validate payload shape and size before doing expensive work. Apply an atomic rate limit before contacting a metered provider, and return responses that do not reveal whether private data already exists.
const accepted = schema.safeParse(input);
if (!accepted.success) return { status: 400 };Publish from one reviewed source
Articles, notes, feeds, and search metadata should project the same reviewed catalog. A draft must not leak through an RSS item, taxonomy count, backlink, or sitemap entry simply because the detail route rejects it.
This is where small explicit notes help: each rule has one owner, while every public surface consumes the same decision.