# Projects

> Selected projects — what they do, how they are built, and where the source lives.

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LLMS index: [llms.txt](/en/llms.txt)

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Grouped by direction: math modeling, AI agent skills, tools & automation, and coursework. Open each project for what it does, how I built it, and the source.

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Section pages:

- [Mathmodel-PI](/en/case/mathmodel-pi/): A desktop workbench for mathematical-modeling contests built on the pi agent framework — modeling, writing, and charting in one place.
- [Pretty Charts Skills](/en/case/pretty-charts-skills/): A chart-craft skill library for AI agents — one unified visual style system across Matplotlib, ECharts, TikZ, and Mermaid.
- [Campus Proxy Guard](/en/case/campus-proxy-guard/): Keeps proxy connectivity stable and alive on campus networks.
- [HJMD Monitor](/en/case/hjmd-monitor/): A lightweight monitoring tool.
- [Chaoxing Auto](/en/case/chaoxing-auto/): An automation tool for Chaoxing (Xuexitong).
- [MD Convert Skill](/en/case/md-convert-skill/): A Markdown conversion skill that turns notes into well-typeset Word, PDF, and HTML.
- [Software Engineering Practice](/en/case/software-engineering-practice/): The software-engineering course capstone: one product delivered through five iterative stages.