docs: finalize AgentOS documentation

- add root agent_os/README.md with system architecture and setup guides
- update DESIGN.md with port 8088 migration and network configurations
- document real-time DAG rendering and high-fidelity risk metrics

agent_os/DESIGN.md

@@ -42,3 +42,6 @@ Synthetic consensus between **Economist** (Efficiency/Risk) and **UI Designer**
 - **Backend:** FastAPI, LangChain, Supabase (Postgres).
 - **Frontend:** React, Chakra UI, React Flow, Axios.
 - **Protocol:** REST for triggers, WebSockets for live streaming.
+- **Network:** 
+  - Backend: `127.0.0.1:8088` (to avoid macOS system conflicts)
+  - Frontend: `localhost:5173`

agent_os/README.md

@@ -0,0 +1,49 @@
+# AgentOS: Visual Observability & Command Center
+
+AgentOS is a real-time observability and command center for the TradingAgents framework. It provides a visual interface to monitor multi-agent workflows, analyze portfolio risk metrics, and trigger automated trading pipelines.
+
+## System Architecture
+
+- **Backend:** FastAPI (Python)
+  - Orchestrates LangGraph executions.
+  - Streams real-time events via WebSockets.
+  - Serves portfolio data from Supabase.
+  - Port: `8088` (default)
+- **Frontend:** React (TypeScript) + Vite
+  - Visualizes agent workflows using React Flow.
+  - Displays high-fidelity risk metrics (Sharpe, Regime, Drawdown).
+  - Provides a live terminal for deep tracing.
+  - Port: `5173` (default)
+
+## Getting Started
+
+### 1. Prerequisites
+- Python 3.10+
+- Node.js 18+
+- [uv](https://github.com/astral-sh/uv) (recommended for Python environment management)
+
+### 2. Backend Setup
+```bash
+# From the project root
+export PYTHONPATH=$PYTHONPATH:.
+uv run python agent_os/backend/main.py
+```
+The backend will start on `http://127.0.0.1:8088`.
+
+### 3. Frontend Setup
+```bash
+cd agent_os/frontend
+npm install
+npm run dev
+```
+The frontend will start on `http://localhost:5173`.
+
+## Key Features
+
+- **Literal Graph Visualization:** Real-time DAG rendering of agent interactions.
+- **Top 3 Metrics:** High-level summary of Sharpe Ratio, Market Regime, and Risk/Drawdown.
+- **Live Terminal:** Color-coded logs with token usage and latency metrics.
+- **Run Controls:** Trigger Market Scans, Analysis Pipelines, and Portfolio Rebalancing directly from the UI.
+
+## Port Configuration
+AgentOS uses port **8088** for the backend to avoid conflicts with common macOS services. The frontend is configured to communicate with `127.0.0.1:8088`.