Tree-sitter Skill

SkillDev tools

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

Use Tree-sitter Skill in Claude, ChatGPT or Ahel Desktop

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Also: Claude Code · Cursor · Codex

Then ask your AI: use the Tree-sitter Skill

Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

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Add Ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Tree-sitter SkillStart free

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/programming-languages/skills/tree-sitter/SKILL.md and read by Ahel’s review.

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

Grammar.js: Follow tree-sitter grammar.js conventions
External Scanners: Use external scanners for context-sensitive lexing
Queries: Write highlight.scm and other query files for editor integration
Testing: Build comprehensive corpus test files
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" }
    }
  }
}

Signals

GitHub stars: 2k
Forks: 113
Last commit: Sep 2026

Advanced

Item type: skill
Key: tree-sitter
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter