Koen van Gilst

Software for One

March 1, 2026

2 min read·— views

Pomodori and Caffeine menu bar apps — a tomato icon and coffee cup icon in the macOS menu bar, with the Pomodori focus duration menu open

I've downloaded the same two small Mac apps many times over the years: a caffeine toggle to keep my Mac awake and a Pomodoro timer to work in focused blocks. This time, instead of downloading them, I asked OpenCode to just build them for me:

  • Caffeine — a small icon in your menu bar that prevents your Mac from going to sleep. Useful during presentations or agentic coding sessions. Costs: 37k tokens, $0.22. Source
  • Pomodori — a tomato icon in your menu bar that counts down 25-minute focus sessions with sound notifications when time is up. Costs: 47k tokens, $0.37. Source

Total costs: $0.59 and about 20 minutes of prompting.

Software has always been a compromise between what one person wants and what's economical to build for many. That logic is starting to break down. Maybe the software of the future will be generated on the fly, while you navigate and talk to your devices. You don't buy, download or install apps: you just ask for what you want, and it appears.