docs: add initial Kugetsu architecture and update README

README.md

@@ -1,22 +1,37 @@
-# kugetsu
+# Kugetsu
 
-Research notes and documentation repository.
-
-> **Name background:** _to be documented_
+> **Name background:** Kugetsu (月掴, "grasping the moon") is derived from Jujutsu Kaisen's "Tokusa no Kage Boujutsu" (Shadow Art Style) — a technique that summons up to ten different creatures from the user's shadow. This project embodies the concept of one orchestrator managing multiple specialized agents working in parallel.
 
 ## Overview
 
-This repository contains research findings, experiments, and documentation on various topics.
+Kugetsu is an **agent orchestration system** that enables parallel task execution across multiple repositories. Inspired by the IT department metaphor:
 
-## Structure
+- **Human** acts as executive, reviewing and approving
+- **PM (Project Manager) Agent** coordinates and delegates tasks
+- **Coding Agents** execute tasks autonomously on assigned issues
 
-```
-├── README.md
-├── CONTRIBUTING.md
-├── LICENSE
-└── docs/
-    └── ...
-```
+The core idea: instead of working through issues one-by-one, a PM spawns multiple coding agents in parallel — similar to Hermes running multiple tasks, but scaled to a full team workflow.
+
+## Why
+
+When you have 10 issues, typically you work through them sequentially. With Kugetsu:
+- PM prioritizes and splits tasks
+- Coding agents work in parallel on their own branches
+- PM reviews and merges to a release branch
+- Human provides final approval to master/main
+
+This means your focus shifts from doing to overseeing — reviewing PRs, not writing code.
+
+## Status
+
+**Phase 1: Research & PoC**
+
+Current focus: Documenting architecture and researching Hermes/OpenClaw capabilities for multi-agent parallelization.
+
+## Documentation
+
+- [Architecture](./docs/kugetsu-architecture.md) — Full system design
+- [Research Index](./docs/_index.md) — All research topics
 
 ## License