what is skill-tree fr?

Skill-Tree is a Chinese-language study guide for backend software engineering interviews, specifically for C++ developer roles. The README is written entirely in Chinese and explains that the author created this resource to summarize the core knowledge areas most relevant to backend development, organized into a structured tree format so that any topic can be found within a few navigation steps. The content is divided into seven chapters: a collection of commonly misunderstood problems and worked corrections, a set of real interview questions, Linux command-line tools, the C++ programming language, data structures and algorithms, computer networking, and operating systems. Each chapter links to a separate markdown file in the repository. The author describes the motivation as wanting a focused, layered reference rather than broad textbooks, since deep familiarity with frequently tested topics is more useful in interviews than wide but shallow coverage. The repository was created in preparation for the autumn job recruitment season, a major hiring period in China for new graduates. Two companion repositories are linked at the bottom: one containing handwritten code examples from the study material, and one called TKeed which appears to be a practice project. The repository is licensed under MIT.