# Patterns/interpreter

> Interpreter Pattern pattern for C development

- Skill: `majiayu000/patterns-interpreter` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/patterns-interpreter`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/patterns-interpreter/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/patterns-interpreter

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# Interpreter Pattern

Define a grammar and interpreter for a language. Parse input into AST, evaluate by walking tree. Used for DSLs, expressions, commands.

## ikigai Application

**Slash commands:** Simple interpreter - parse command name and args, dispatch to handler.

**Future DSL possibilities:**
- Query language for conversation search
- Filter expressions for message selection
- Template syntax for prompts

**Current approach:** Slash commands are simple enough that full interpreter isn't needed. Direct string matching suffices.

**When to use:** If command syntax grows complex (flags, subcommands, expressions), consider proper parser with grammar definition.

**ANSI parsing:** Terminal escape sequences are interpreted via state machine, a lightweight interpreter.