Building real systems with AI,
one day at a time.
BuildHub is a public build log from a non-engineer shipping production-grade automation with Claude Code as the sole engineer. Every post is a real-day of debugging, designing, and deploying.
// latest posts
all →From Nine DRY RUN Failures to Go-Live: Joseph's T+2 Triple Lock, 458 Tests, 18 Crons
Joseph, an automated investment execution agent, entered live observation on 2026-04-20. This is the full technical write-up — nine failure modes, the T+2 triple lock, Shioaji pitfalls, and every cron in the schedule.
Seven Principles I Learned Working with Claude: Spec-Driven, Boundary-First, Decisions That Stick
Three months of pair-building Joseph with Claude Code gave me seven principles that let the AI actually run the development loop on its own — not babysitting-style collaboration where you hover over every step.
I Killed Three Projects Before Joseph Survived: A Non-Engineer's Three-Month AI Build Log
Retail worker in Hualien, not an engineer, four projects, three killed. From CAIOS to Joseph — an investment agent that went live on 2026-04-20. Honest post-mortem, not a success story.
Hello, BuildHub
Why a non-engineer is starting a daily build log, and what to expect from the rest of the posts.
// about this project
A non-engineer uses AI to build a fully automated stock-trading research system. The build process is documented here daily — what broke, how it was debugged, what was learned. read the full story →