# 👋 Hi, I'm Masato (誠人)
**Independent AI Architect / OSS Developer**  
Building human-paced, persona-driven AI systems.

## 🚀 What I Build
- **SaijinOS** — A lightweight, multi-persona AI platform  
  - 20-persona core  
  - BPM-synced emotional routing  
  - 99.99% repo trim (9GB → 557KB)  
  - FastAPI backend + Flutter UI  
- Declarative **YAML persona architecture**  
- Human-centered AI patterns (breath cycles, emotional timing)

## 🌐 Dev Community Activity
- Writing the **SaijinOS Series** on DEV (600+ reads)  
- Followed by engineers, researchers & red-team specialists  
- Active in open-source and AI system design

## 🛠 Tech Stack
- Python / FastAPI / Flutter  
- YAML-driven architecture  
- AI persona systems  
- GitHub Actions / CI  
- DevOps & lightweight deployment  

## 📫 Contact
- LinkedIn: https://www.linkedin.com/in/kato-masato-59a66b337  
- DEV: https://dev.to/kato_masato_c5593c81af5c6