https://ericlim.dev/tags/zod/ Recent content in Zod on /dev/eric Hugo en-GB Wed, 09 Sep 2026 08:23:00 +1200 https://ericlim.dev/posts/20260909t082339--dont-kneel-before-zod/ Wed, 09 Sep 2026 08:23:00 +1200 https://ericlim.dev/posts/20260909t082339--dont-kneel-before-zod/ <p>I’ve found yet another reason to hate <a href="https://github.com/colinhacks/zod">zod</a> in production. I associate it with other bloatware, the likes of ORMs and heavy frameworks such as NestJS. Before I digress into more ragebait ranting on this beloved library, I’d like to share how <code>schema.parse()</code> caused a SEV-2 incident.</p> <h2 id="the-incident">The Incident</h2> <h3 id="one-extra-string">One extra string</h3> <p>A React app I work on ships as a micro frontend into a much larger host application. My team owns both ends of the contract, and every response from those services gets validated with zod before it reaches any state. One of those responses is a map of note templates, each declaring which sections of a clinical note it belongs to.</p>