nowfound

AI · May 10, 2026

IB

I built a 500K LOC production app alone in 7 months. Here is the proof

Here is the proof, a 5-hour uncut live session, no edits, no cuts: https://youtu.be/VPrU8WZJOVs Full article: https://medium.com/@bonjourjoel/i-built-a-500-000-line-produ... I believe I am the first human to have done this in a documented, verifiable way: maintaining a stable production-grade 500,000-line TypeScript codebase as a solo developer, using an AI coding assistant I built myself. If you know someone who has done the same, one person, 500k lines, documented proof, please write their name in the comments.

I built a 500K LOC production app alone in 7 months. Here is the proof launched on May 10, 2026 with 5 votes, #2,008 of 20,538 launches that month and more than 75% of that year's launches.

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