canonical_url: https://ai-hack-lab.com/insights/arena-blueprint-launch-eve/

Context — I'm shipping Arena Blueprint on May 13, 2026 (JST). I'm a new HN account, so my Show HN hit a submission limit and didn't reach the front page — figured I'd post the technical write-up here first instead. This is the post I wanted to read 9 months ago, before I burned a quarter on dead ends.

TL;DR

I'm a 20-year-old undergrad in Japan. Started writing code 9 months ago by talking to Claude Code.

Built and ran an automation system in production: B2B proposal pipeline (Lancers/CrowdWorks), customer reply, content distribution, self-evolution loop.

4 customer-facing failures along the way (duplicate sends, silent skips, dead schedulers, dedup race) — each became a transferable pattern.

Packaged as a Notion blueprint + MIT-licensed Skills bundle on GitHub.

This post is what I'd give my past self on day 1 . Free. Long.…