AST Manipulation
Expert skill for abstract syntax tree design, traversal, transformation, and manipulation patterns
npx skills add a5c-ai/babysitter --skill ast-manipulation --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# AST Manipulation Skill ## Overview Expert skill for abstract syntax tree design, traversal, transformation, and manipulation patterns. ## Capabilities - Design typed AST node hierarchies - Implement visitor and transformer patterns - Build AST rewriting systems - Implement AST diffing and patching - Generate AST pretty-printers and formatters - Support AST serialization (JSON, binary) - Implement pattern matching on AST structures - Design span/location tracking systems ## Target Processes - ast-design.js - semantic-analysis.js - ir-design.js - code-generation-llvm.js - lsp-server-implementation.js - macro-system-implementation.js ## Dependencies None (core skill) ## Usage Guidelines 1. **Node Design**: Design immutable AST nodes with clear ownership semantics 2. **Location Tracking**: Include source spans on all nodes from the beginning 3. **Visitor Pattern**: Implement visitor pattern for extensible traversal 4. **Transformation**: Use transformer pattern for AST-to-AST transformations 5. **Serialization**: Support both human-readable (JSON) and efficient (binary) serialization ## Output Schema ```json { "type": "object", "properties": { "nodeTypes": { "type": "array", "items":
- Overview
- Capabilities
- Target Processes
- Dependencies
- Usage Guidelines
- Output Schema
What does the AST Manipulation skill do?
Expert skill for abstract syntax tree design, traversal, transformation, and manipulation patterns
How do I install it?
Run `npx skills add a5c-ai/babysitter --skill ast-manipulation --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From a5c-ai/babysitter, a repository with 1,642 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.