# Cairo Macros

> Explain Cairo declarative macros, macro hygiene, and macro vs function tradeoffs; use when a request involves writing or understanding `macro` definitions in Cairo.

- Skill: `teddyjfpender/cairo-macros` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add teddyjfpender/cairo-macros`
- Raw SKILL.md: https://api.skillmd.com/api/skills/teddyjfpender/cairo-macros/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: teddyjfpender (https://skillmd.com/u/teddyjfpender)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/teddyjfpender/cairo-macros

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# Cairo Macros

## Overview
Explain declarative (inline) macros, pattern matching, and hygiene in Cairo.

## Quick Use
- Read `references/macros.md` before answering.
- Show a small `macro` definition with pattern and expansion.
- Mention `$defsite`, `$callsite`, and `expose!` when hygiene matters.

## Response Checklist
- Explain that macros expand at compile time and can take variable arguments.
- Note that macros must be defined or imported before use.
- Use match-like patterns with `$()` and repetition modifiers.

## Example Requests
- "How do I write an array-building macro?"
- "What are $defsite and $callsite in Cairo macros?"
- "When should I use a macro instead of a function?"