filetree-skill
filetree-skill is a Claude Code plugin that generates and maintains a FILETREE.md file to help large language models quickly understand a codebase layout without expensive exploration. This single markdown file provides a one-line description for every tracked file, paired with an eight-character content hash derived from git for staleness detection. By persisting this index in version control, teams avoid redundant relearning of project structures in every new session. The plugin offers commands to initialize the tree from scratch, update it to reflect current repository states including additions and renames, and lint for drift without invoking the LLM. It intelligently minimizes token usage by refreshing summaries only when content hashes indicate changes or when new files appear, while marking unchanged entries as UNCHANGED. The tool also assists in integrating the file tree reference into existing project documentation like CLAUDE.md or AGENTS.md by suggesting context-appropriate entries. It avoids backg