One Developer, Four Repos, 42 Releases: What Parallel AI Agents Actually Cost Me
Since January 7th I have shipped 458 commits across four repositories of a single product and cut 42 releases. The product is a London Underground app: an iOS client (Swift, TCA), an Android client (Kotlin, Compose), a web version (React, WebGL2) and a Go backend. Thirteen App Store releases, ten on Google Play, eleven web, eight backend.
No, the app was not written by an AI. Product decisions, architecture and priorities stayed with me. All of the design was done by my girlfriend: the visual system, the UX, and the tube map itself, which she drew by hand. Claude Code agents took over the least rewarding part of cross-platform work, which is carrying one decision onto four stacks without losing the details on the way.
None of this is free, and some of the side effects are visible in the product itself. What follows is how the team is set...
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