Babysitter Tree-sitter

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

install

source · Clone the upstream repo

git clone https://github.com/a5c-ai/babysitter

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/a5c-ai/babysitter "$T" && mkdir -p ~/.claude/skills && cp -r "$T/library/specializations/programming-languages/skills/tree-sitter" ~/.claude/skills/a5c-ai-babysitter-tree-sitter && rm -rf "$T"

manifest: library/specializations/programming-languages/skills/tree-sitter/SKILL.md

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

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" }
    }
  }
}