Lab
Problems I've solved in production, rewritten from scratch with invented data. Everything runs in your browser: play with it and try to break it. If you'd like to see the code and its tests, just ask.
- Warehouse simulator A whole Black Friday in seconds: where it jams and what fixes it
- Vertical lift module Two pick-to-light towers race: one order at a time against batches
- RFID tunnel A box rides past four antennas and the engine decides whether it matches the order
- Carrier rate engine Rules, surcharges and the cheapest carrier, with a fallback when one goes down
- Carrier invoice auditor Drop the carrier CSV and get back what you can claim
- Tracking normalizer Three carriers, three formats and one story, with stalled parcels and estimated arrival
- RFID SGTIN-96 decoder The 96 bits of an RFID tag, field by field, per the GS1 standard
- Guardrails for an AI that writes SQL Try to sneak in a dangerous query and see which layer stops it
- API explorer Every piece as an API, with an OpenAPI spec