喜欢探索新技术，通过实践构建有价值的软件系统。
Case studies that document the problem, the architecture, the trade-offs and the result.
带评测体系的 RAG + Agent 知识库问答平台
上传文档即可问答的 RAG 平台：标题感知分块 + BM25/向量混合检索 + Rerank + SSE 流式回答，自带 52 题评测体系与 Agent 工具调用。
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校园图书借阅系统 —— 高校图书馆数字化借阅与智能推荐平台
面向高校图书馆的全栈借阅平台：用确定性锁顺序消除并发死锁、用 FIFO 闭环状态机管理孤本预约、用库存感知的多路加权做推荐，后端 248 + 前端 96 用例，含 3 个并发硬断言。
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校园二手交易平台 —— 校园闲置交易与信用体系
面向高校的二手交易平台：校园身份认证（邮箱 / 学号双通道）作为发布硬前置，注册到评价的完整交易闭环与 100 分初始信用档案，单端口边缘网关交付，线上 40+ 接口 / 60+ 断言验收。
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Technologies grouped by area, limited to what has actually been used in real work.
The disciplines this portfolio documents alongside each project — from how a system is structured to how it is shipped and operated.
How a system is decomposed into parts, where the boundaries are, and why.
Tokens, components and rules that keep an interface consistent as it grows.
Resource shapes, contracts, versioning and error semantics.
Schema, indexes, constraints and the query patterns they have to serve.
Which behaviours are worth locking down, and at which layer to do it.
Measuring first, then removing the bottleneck that actually matters.
Logs, metrics and traces that make a running system explainable.
Reproducible builds, repeatable releases and a recoverable rollback.
Authentication, authorisation, input handling and the boundary around secrets.
我是韦坤（kg），计算机科学专业本科生，2027 届在读。喜欢尝试新事物，用好奇心开路，用思考导航，用责任心收尾。
在学习与项目实践中，我关注从需求分析、系统设计、编码实现到测试部署的完整流程，目前主要方向是后端接口开发（Python / Java）与 AI 应用开发（大模型接口调用、知识库问答）。
Open to conversations about software engineering work. Real contact channels are listed on the contact page — nothing is invented here.