I built a 500K LOC production app alone in 7 months. Here is the proof
Details
- External ID
- 48081450
- Source
- HN
- Company
- —
- Product
- —
- Website domain
- —
- Launched
- May 10, 2026
- Cohort
- —
- Upvotes
- 5
- Upvotes percentile
- 0.1147011308562197
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:26 p.m.
- Updated at
- Sept. 7, 2026, 9:26 p.m.
Description
Here is the proof, a 5-hour uncut live session, no edits, no cuts: https://youtu.be/VPrU8WZJOVsFull 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.
Enrichment
- Theme
- indie hacker passion projects
- Vertical
- Horizontal
- Function
- —
- Audience
- —
- AI stance
- —
- Project type
- Hobby / open-source project
- Normalized one-liner
- —
- Manually corrected
- False
Could you build this?
Yes The submission itself is a demonstration and proof-of-concept of building and maintaining a large-scale application entirely through solo AI-assisted development.
Discussion
2 comments analyzed.
Concerns raised: Lines of code not a meaningful quality metric, Unclear what was actually built versus assisted, Claim of zero regression difficult to verify
Competitors
Other products that read as similar to this one — 42 launches clear the similarity bar, closest 8 shown.
Attention rank: #37 of 43 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 188 days after the earliest competitor.
- Codemaxxed · hn · 2026-04-17 · 5 upvotes · similarity 0.48
- I made a Mario Galaxy game with Claude Code and Three.js in 53 days · hn · 2026-04-01 · 7 upvotes · similarity 0.41
- Build apps with 500 models locally. No tracking, no cloud, just code · hn · 2025-12-21 · 6 upvotes · similarity 0.40
- I built an AI that generates full-stack apps in 30 seconds · hn · 2025-11-03 · 8 upvotes · similarity 0.37
- The Jac Programming Language · hn · 2026-07-26 · 9 upvotes · similarity 0.37
- Case study: A coding agent refactors a 750k LOC app, no code review · hn · 2026-07-27 · 6 upvotes · similarity 0.37
- 1D-Pong Game at 39C3 · hn · 2026-01-11 · 69 upvotes · similarity 0.36
- No AI · hn · 2026-04-24 · 9 upvotes · similarity 0.36
Other launches for this product
- No other launches for this product.