Tree-Sitter

What Is the AST-grep Tree-sitter Rust Rewrite? AST-grep, the popular structural code search tool with over 15,000 GitHub stars, rewrote Tree-sitter’s C parsing core entirely in Rust using ChatGPT-assisted code generation. The result is a 29.74% improvement in raw parsing throughput and a 22.2% faster end-to-end code analysis pipeline, making it significantly faster for AI coding agents and developer tools that rely on syntax-tree-based code understanding. Why Did AST-grep Rewrite Tree-sitter in Rust? Tree-sitter has been the gold standard for incremental parsing in code editors since its release. Its C core is battle-tested and powers syntax highlighting in editors like Neovim, VS Code, and Zed. But AST-grep’s use case is fundamentally different from an editor’s. ...

If you use Claude Code, Cursor, or Codex on a codebase larger than a few thousand lines, you’ve felt the pain: every new session starts from zero. The agent greps for a function signature, reads the file, greps for callers, reads more files, and burns through tokens just to reconstruct context you already understood last session. AiDex is an MCP server that tries to fix this with a persistent Tree-sitter code index, semantic search, and cross-session memory. I spent a week testing it against four direct competitors. Here is what I found. ...