What problem does it solve?
LLMs frequently generate malformed structured outputs such as invalid JSON, incorrectly formatted emails, or broken code when prompted for specific formats, requiring extensive post-processing, retry loops, and validation logic that slows development and introduces failure points in production workflows.
Core Features & Use Cases
- Constrained Generation: Enforce regex and grammar rules during LLM inference to guarantee outputs match required formats like JSON, XML, emails, dates, and code syntax, eliminating invalid results.
- Token Healing: Automatically fix tokenization boundary issues to produce natural, correctly formatted outputs without awkward spacing or broken tokens.
- Multi-Step Workflow Support: Build complex agent workflows, chain-of-thought reasoning, and data extraction pipelines using Pythonic control flow with reusable, stateful generation functions.
- Backend Agnostic: Works with all major LLM providers including Anthropic Claude, OpenAI, local Hugging Face Transformers models, and llama.cpp for flexible deployment.
- Use Case Example: A development team can use this skill to build a data ingestion pipeline that extracts structured user information (name, age, email) from unstructured support tickets, with guaranteed valid output format that can be directly inserted into a database without additional validation.
Quick Start
Use the guidance skill to extract a structured user profile with name, age, and email fields from the unstructured support ticket text "User Jane Smith, 28, [email protected] contacted support about a billing issue on 2024-10-05."