Ryan Tsuji / 辻
CTO at airCloset, Inc.. Building cortex, our AI-first dev platform where AI handles the review, fix, deploy, and incident-response loops.
What I write about
Notes on harness engineering — the systems around AI agents that decide whether they ship or just demo. Most posts are field notes from building cortex in production: Auto Review, Self-Healing Ops, Product Graph, MCP servers, Agentic Graph RAG.
Series in progress: Building AI Harness.
Recent posts
- Building a Real AI Harness — Series Intro
- Graph RAG Isn't a One-Shot Anymore — Agentic Graph RAG MCPs
- Cutting Self-Built MCP Server Token Usage by 90% — The Parking Pattern
- Opening Internal Ops to AI — 17 In-House MCP Servers
- DB Graph MCP — Cross-DB Natural-Language Search via Graph RAG
Full archive: /posts.