outlines

Constrain language model token generation with schemas and grammars for valid structured outputs.

Updated Feb 21, 2026
One-click install
npx skills add https://github.com/Gitnapp/Skills --skill outlines-gitnapp
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: outlines
Source: https://github.com/Gitnapp/Skills/tree/main/mlops/inference/outlines
Command: npx skills add https://github.com/Gitnapp/Skills --skill outlines-gitnapp

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill solves the problem of unreliable AI generation by enforcing valid structured outputs such as JSON, XML, and code formats instead of relying on post-generation correction.

Core Features & Use Cases

  • Structured Generation: Constrains model token generation with schemas, grammars, regex patterns, and typed outputs to guarantee format validity.
  • Pydantic Integration: Generates type-safe data structures from Pydantic models and JSON schemas for extraction, classification, and application workflows.
  • Local Model Support: Works with Transformers, llama.cpp, vLLM, and other inference backends for fast structured generation in production environments.
  • Use Case: Extract customer records, classify documents, generate API specifications, or create validated code structures from unstructured prompts.

Quick Start

Use the outlines skill to generate a validated JSON response matching my Pydantic model using a local language model.

Frequently Asked Questions about outlines

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I guarantee valid JSON structured outputs from a local language model?

To guarantee valid JSON structured outputs from local language models, you constrain token generation using grammar-based token control and schema validation rather than relying on post-generation correction. This enforces format validity directly during inference.

Can I use Pydantic models to enforce structured generation with vLLM?

Yes, you can use Pydantic models to enforce structured generation with vLLM. The system generates type-safe data structures from Pydantic models and JSON schemas, working with vLLM, Transformers, and llama.cpp backends for reliable extraction.

What is the best way to extract data from unstructured text using local inference?

The best way to extract data from unstructured text using local inference is applying schema-driven token control with Pydantic integration. This constrains the model to generate validated structures like customer records or classified documents directly.

Does grammar-based token control work with Transformers and llama.cpp backends?

Grammar-based token control works with Transformers and llama.cpp backends for structured generation. It applies regex patterns, schemas, and typed outputs to guarantee format validity across these supported local inference platforms.

Why does my language model generate invalid JSON schemas despite prompt instructions?

Language models generate invalid JSON schemas despite prompt instructions because prompts cannot reliably enforce format constraints. You need grammar-based token control and schema validation during generation to guarantee valid structured outputs.

When do I need structured generation for LLM inference workflows?

You need structured generation for LLM inference workflows when extracting data, classifying documents, generating API specifications, or creating validated code structures. It guarantees valid outputs using schemas, grammars, and regex patterns.