Side projects, experiments, and tools — from first hypothesis to shipped product. Each one tests an idea in public.
A suite of LLM-based tools to validate startup ideas.
Pressure-test your assumptions before you build. ProductBud puts a set of LLM-powered tools behind the hardest part of a new idea — sharpening the problem, stress-testing demand, and getting to real evidence fast, without a full research cycle.
Validation, not vibes. Evidence before you build.

Stop staring at the blank page. Start writing.
A writing tool that doesn't tell you what to write — it gets you to actually write. Real-time pace tracking nudges you when you slow down, visualizes your words-per-minute, and keeps you in the chair. When you're done, paste your session into your manuscript and move on. Works for any genre. The horror is just the soundtrack.
Doesn't write for you. Gets you to write.

One step at a time cooking for kids.
A full-screen mobile app that breaks recipes into single, focused steps. It reads instructions aloud, adjusts portions to kid-friendly measurements (half a cup, not 118ml), runs timers in-app, and shows visual guides — all one thing at a time. Immersive and distraction-free, so kids just focus on what they're making right now.
Built for kids who get overwhelmed, not just entertained.
github.com/lszyrmer
All the projects above are built in the open. Source code for Writing Horror and Kid Chef is available on GitHub — both written in TypeScript.
Editor — Evaluative Market Experiments
Section editor for the market and evaluative research chapters of The Real Startup Book by Kromatic — an open-source guide to startup validation methods used by innovation teams worldwide. One of five editors alongside Tristan Kromer and others.