docs: add AGENTS.md knowledge base files

AGENTS.md

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+# PROJECT KNOWLEDGE BASE
+
+**Generated:** Sat Jan 24 2026
+**Context:** Monorepo for Flux Panel (Traffic Forwarding)
+
+## OVERVIEW
+Flux Panel is a traffic forwarding management system based on [go-gost](https://github.com/go-gost/gost). It manages tunnels, port forwarding, and user quotas.
+**Stack:** Monorepo (Java/Spring Boot Backend + React/Vite Frontend + Go/GOST Service).
+
+## STRUCTURE
+```
+/root/flux-panel/
+├── springboot-backend/  # Java 21 + Spring Boot 2.7 Admin API
+├── vite-frontend/       # React 18 + Vite + HeroUI/NextUI
+├── go-gost/             # Go 1.23 + GOST Extensions (Core logic)
+├── docker-compose*.yml  # Deployment configs (v4/v6)
+└── *.sh                 # Install scripts (panel_install.sh, install.sh)
+```
+
+## WHERE TO LOOK
+| Task | Location | Notes |
+|------|----------|-------|
+| **Admin API** | `springboot-backend/` | Users, quotas, billing logic |
+| **UI/Dashboard** | `vite-frontend/` | Management console |
+| **Core Forwarding** | `go-gost/` | GOST implementation & extensions |
+| **Deploy** | `docker-compose-v4.yml` | Container orchestration |
+
+## CONVENTIONS
+- **Monorepo**: 3 distinct languages/stacks. Treat each subdir as a separate project.
+- **Docker**: Primary deployment method.
+- **Scripts**: `panel_install.sh` for panel, `install.sh` for nodes.
+
+## COMMANDS
+```bash
+# Quick Deploy (Panel)
+./panel_install.sh
+
+# Quick Deploy (Node)
+./install.sh
+
+# Docker
+docker-compose -f docker-compose-v4.yml up -d
+```