Open Source on Coderrob

Announcing TypeScript Type Guards

Thu, 02 Apr 2026 10:00:00 -0500

TypeScript is excellent at telling you what you meant to pass around.

Runtime is excellent at reminding you that expectations are not a security boundary.

I published TypeScript Type Guards as a small utility package for narrowing unknown values without rewriting the same little checks in every project.

Why This Exists

This sits in the same general trust-and-guardrails bucket as my ESLint Zero-Tolerance AI anti-slop rules, but at a different layer.

Contributing to the .NET Runtime

Fri, 16 Apr 2021 18:25:55 -0500

My First .Net Contribution

Today a feature enhancement I proposed and implemented was merged into the .Net runtime main branch for .Net 6 release!

The Background

At the time I was working for a company called, WatchGuard Video. WatchGuard built body cameras and the evidence management software for them. I was hired originally to come in to help launch Evidence Library.

The site, when I started, was several independent SPA sites in a mono-repository. Myself and the other engineers were working on upgrading ASP.Net Framework to .Net Core. One of the biggest concerns, beyond authentication, was configuration.