Show HN: NiftyAgent – Single file agent CLI under 500 LOC
AI Digest
单文件CLI模型灵活切换功能自定义扩展
NiftyAgent 是一个单文件AI代理CLI工具，代码量不足500行，展示复杂AI工具可简化实现，支持模型切换和功能扩展。
NiftyAgent is a single-file AI agent CLI under 500 LOC, demonstrating how complex tools like Claude/Codex can be simplified with minimal code.
Key points
- 单文件架构实现AI代理CLI，无Node.js依赖 Single-file architecture with no Node.js dependencies
- 支持Nano-GPT及多种模型（如GPT-5.6）切换 Supports Nano-GPT and multiple models (e.g., GPT-5.6)
- 通过提示指令实现功能自定义扩展 Customizable via prompt-based instruction updates
- 包含安全限制与法律免责声明 Includes safety restrictions and legal disclaimers
Takeaway: 复杂AI工具可通过极简代码实现核心功能 / Complex AI tools can be implemented with minimal code for core functionality
Why it matters 展示复杂AI工具简化实现的可能性，对开发者有启发
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