---

name: Tree-sitter description: Expert skill for creating tree-sitter grammars for incremental parsing and syntax highlighting category: Tooling allowed-tools:

• Read
• Write
• Edit
• Glob
• Grep
• Bash graph: domains: [domain:software-engineering] specializations: [specialization:programming-languages] skillAreas: [skill-area:compiler-implementation, skill-area:language-design] roles: [role:backend-engineer]

---

Tree-sitter Skill

Overview

Expert skill for creating tree-sitter grammars for incremental parsing and syntax highlighting.

Capabilities

• Write tree-sitter grammar.js files
• Handle tree-sitter external scanners
• Design queries for syntax highlighting
• Implement incremental parsing support
• Handle tree-sitter error recovery
• Generate bindings for various languages
• Integrate with editors (VS Code, Neovim, Helix)
• Test grammars with corpus files

Target Processes

• language-grammar-design.js
• lexer-implementation.js
• parser-development.js
• lsp-server-implementation.js

Dependencies

• tree-sitter CLI
• tree-sitter crates/npm packages

Usage Guidelines

1. Grammar.js: Follow tree-sitter grammar.js conventions
2. External Scanners: Use external scanners for context-sensitive lexing
3. Queries: Write highlight.scm and other query files for editor integration
4. Testing: Build comprehensive corpus test files
5. Error Recovery: Design grammar with error recovery in mind

Output Schema

{
  "type": "object",
  "properties": {
    "grammarName": { "type": "string" },
    "nodeTypes": {
      "type": "array",
      "items": { "type": "string" }
    },
    "queries": {
      "type": "array",
      "items": {
        "type": "string",
        "enum": ["highlights", "injections", "locals", "tags", "folds"]
      }
    },
    "bindings": {
      "type": "array",
      "items": { "type": "string" }
    },
    "generatedFiles": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}