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귀래당
Your Bazi chart, computed by astronomy — not guessed by AI
Hi everyone
I used to work as a librarian in Korea — no coding background. I built Gwiraedang with Claude Code because I noticed ChatGPT and other AI chatbots often get Korean BaZi (사주) charts wrong: converting a birth date into the correct Four Pillars chart requires precise astronomical calculation (solar terms), and generative models tend to guess instead of compute.
So I separated the two: a deterministic astronomy engine computes the chart (checked against Korea's official astronomical institute data), and 5 distinct AI counselor personas handle the conversation on top of an already-correct chart — each reading from a different classical tradition, designed not to just flatter you.
Since I can't code-review myself, I leaned hard into automated testing (2,700+ tests) to catch mistakes instead.
Would love feedback, especially on whether the "computed, not generated" pitch makes sense to people who've never tried a BaZi app before. Happy to answer anything about the build!
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About 귀래당 on Product Hunt
“Your Bazi chart, computed by astronomy — not guessed by AI”
귀래당 was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #140 on the daily leaderboard. 마음을 쉬고 싶을 때 돌아오는 집, 귀래당. 천문 계산 만세력으로 명식을 정확히 펴고, 다섯 상담사가 듣기 좋은 말로 띄우지 않고 정직하게 당신 이야기를 들어요. 점이 아니라 나를 비추는 거울 같은 대화.
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