Guidance: Constrained LLM Generation

When to Use This Skill

Use Guidance when you need to:

• Control LLM output syntax with regex or grammars
• Guarantee valid JSON/XML/code generation
• Reduce latency vs traditional prompting approaches
• Enforce structured formats (dates, emails, IDs, etc.)
• Build multi-step workflows with Pythonic control flow
• Prevent invalid outputs through grammatical constraints

Installation

# Base installation
pip install guidance