Takafumi Mizuguchi
At 2 AM a parent's child has a fever.
Core trick
Loads a pharmacist-written skill file and forces the model to return one of three fixed triage verdicts with warning signs.
Tags
Description
At 2 AM a parent's child has a fever. Three options: call a professional, drive to an open pharmacy, or wait until morning. The right one needs medical judgment the parent doesn't have. Japan's pediatric advice line takes 1.24M such calls a year — and its own ministry flags eleven structural gaps.
Yorukusu is a SwiftUI iOS app that loads a pharmacist-authored Agent Skill (red-flag screening, OTC-only logic, parent-facing safety rationale), reconciles against a device-local Personal Health Context, and asks Claude Opus 4.7 to return one of three answers: CALL the right emergency number, GO to a pharmacy with a pharmacist on duty, or WAIT with explicit warning signs. Yorukusu does not diagnose — pharmacist-informed, not pharmacist-replacing.
README excerpt
# Yorukusu Night pharmacy triage for parents at 2 AM. Describe your child's symptom — Yorukusu loads a pharmacist-authored Skill, sends the minimum necessary case context to Claude Opus 4.7, and returns one of three answers: **CALL** the right emergency number, **GO** to a pharmacy with a pharmacist on duty, or **WAIT** with explicit warning signs. **Built for the Built with Opus 4.7: Cerebral Valley × Anthropic Hackathon (April 21-26, 2026)** 🎬 Demo: https://youtu.be/FdMz9ZeP1Dg > **Yorukusu does not diagnose.** Pharmacist-informed, not pharmacist-replacing. ### For Other Builders I kept a daily build log throughout the hackathon — see [`docs/KEEP-THINKING.md`](docs/KEEP-THINKING.md) for the unfiltered iteration trail: which Skills got it right the first time, which required three rewrites after clinical review, which edge cases only surfaced during testing. ### Contact - X: [@Guttyo](https://x.com/Guttyo) - LinkedIn: [Takafumi Mizuguchi](https://www.linkedin.com/in/takafumimizuguchi) ## The Problem At 2 AM, a parent's child has a fever. Three options exist: call a professional, drive to an open pharmacy, or wait until morning. The right answer depends on medical judgment the parent does not have. Japan's pediatric phone consultation hotline (#8000) handled **1,242,486 such calls in fiscal year 2023 alone (Apr 2023 – Mar 2024)** ([MHLW FY2024 annual report](https://www.mhlw.go.jp/content/10800000/001587803.pdf)). Of children who reach overnight emergency clinics,