outlines

Generates JSON, XML, and code outputs conforming to Pydantic/JSON schema validations using grammar-driven local models.

2|2|Updated Apr 16, 2026
One-click install
npx skills add https://github.com/huidge/hermes-skills --skill outlines-huidge
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: outlines
Source: https://github.com/huidge/hermes-skills/tree/main/mlops/inference/outlines
Command: npx skills add https://github.com/huidge/hermes-skills --skill outlines-huidge

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill ensures generated data adheres strictly to JSON/XML/code schemas, enabling reliable downstream processing and validation.

Core Features & Use Cases

  • Local, zero-overhead structured generation driven by grammars and Pydantic models.
  • Supports JSON schemas, XML-like structures, and code payloads with strict type safety.
  • Use cases include data pipelines, API contracts, and automated data extraction with guaranteed formatting.

Quick Start

Ask an AI to generate a strictly structured JSON, XML, or code output that conforms to a defined schema.

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 schema generation from local models?

To guarantee valid JSON schema generation from local models, you apply schema-driven grammars and Pydantic validation during the generation process. This enforces strict type safety and deterministic, structured outputs without data pipeline overhead.

How do I enforce Pydantic validation during local model text generation?

You enforce Pydantic validation by driving the local generation process with JSON schemas derived from your Pydantic models. This schema-driven approach guarantees deterministic, type-safe outputs that strictly adhere to your defined data contracts.

Can I use local models like vLLM and llama.cpp for structured data extraction?

Yes, you can use local backends like vLLM and llama.cpp for automated data extraction. By applying schema-driven grammars, these local models generate strictly structured JSON or XML payloads that guarantee reliable downstream processing.

What is the best way to ensure API contracts are respected by local LLM outputs?

The best way to ensure API contracts are respected is through zero-overhead structured generation driven by grammars. This applies strict JSON schema validation to the local model's output, guaranteeing deterministic and type-safe API payloads.

Does structured generation with grammars work for XML and code payloads?

Yes, structured generation with grammars works for XML-like structures and code payloads. It enforces strict type safety and formatting rules across these formats, ensuring reliable downstream processing for data pipelines and automated extraction.

Why do I need local backends for schema-driven structured generation?

You need local backends like Transformers, vLLM, or llama.cpp to apply grammar constraints directly during the generation process. This local execution enables zero-overhead, deterministic structured output generation that strictly adheres to JSON schemas.