Open source Self-hostable free
LicenseApache-2.0
PriceFree
UsageNo model cost
Model supportmulti
Languagespython
GitHub stars7.1k
Last activity2026-06-30
Verified2026-06-28
Verified byseed
A library for adding structural validation, output formatting, and safety guardrails to LLM applications, with a registry of reusable validators.
Strengths
- Rich validator registry for structure, safety, and correctness
- Structural validation ensures outputs match expected schemas
Tradeoffs
- Overhead in defining validators for custom use cases
- Not a complete security solution on its own