built by me

lumo.

A decision tool for product managers. Built end to end on the Claude API, as a Next.js app on Vercel.

Working prototype, 2026
Terrance Range working on his phone at a cafe table

How it works

You write down your first instinct. Lumo researches the decision, shows where your instinct and the evidence disagree, and drafts an update for each team affected. Over time, your record shows where your instincts tend to be off and reminds you of your own rules the next time a similar decision comes up.

Product decisions

  • Capture the instinct before showing any evidence, so the record stays honest.
  • No account, no install, and decisions stay in the browser, so a PM can try it without IT approval.
  • Positioned against the two real alternatives: a chat that forgets every past decision, and a journal that does none of the work.
  • Launched in English and Spanish.
Try the demo at trylumo.coNumbers shown in the demo are sample data, not results.