Guardrails AI

What it is
Guardrails is a Python library that validates and structures LLM outputs to ensure they meet schema, quality, and safety requirements. Great for production pipelines.

Key features

• Pydantic-style schemas: Define expected output formats easily.
• Re-asks: Automatically re-run the LLM until the output is valid.
• Custom validators: Add checks like regex, length, or semantic constraints.
• Streaming & multi-modal support: Works with audio, image, and streaming data.
• Observability: Track, log, and debug generations in real-time.