An engineering notebook on AI, systems, and everyday experiments.

从性能SUV换到劳斯莱斯库里南后，发现人和车相互塑造影响，油门刹车调校、底盘滤震和路感都在潜移默化改变驾驶风格和心态。

How switching from a performance SUV to a Rolls-Royce Cullinan changed my driving style, revealing the mutual influence between users and products through throttle, chassis, and road feel.

Agentic AI在5000行以上代码失效的根本原因是上下文窗口限制。解决方案：用文档驱动开发作为长期记忆，支持多Agent协作和人机配合工作流。

Agentic AI fails above ~5000 lines due to context window limitations. Solution: document-driven development as long-term memory, enabling multi-agent collaboration and human-AI workflow.

分析Manus如何打通调研和生成链路实现端到端体验，以及Agentic AI产品在工具、数据和智能三个维度的复利效应如何构筑持久护城河。

Exploring why Manus succeeded by bridging Deep Research and Cursor, and analyzing the compound effects in tools, data, and intelligence that create lasting moats for Agentic AI products.

Claude Code是被低估的AI Native软件开发关键拼图，推动Library as a Service模式，帮助AI有效对接企业级代码库。

Claude Code is the overlooked key to AI-native software development, enabling Library as a Service (LaaS) and bridging AI with existing enterprise codebases.

用Skyfield库模拟行星位置，通过可见性、直线排列度和黄经集中度三项指标量化评估行星连珠现象，实现天体排列的定量分析与预测。

A quantitative approach to identifying planetary alignments using orbital mechanics and Skyfield library, combining visibility, linear alignment, and longitude clustering metrics to search decades of astronomical data.