parsec

Overview

parsec is a Python SDK that ensures LLM outputs conform to specified structures using Pydantic models. The parsec playground is a web-based development environment for testing LLM prompts with structured JSON schema validation.

Key Features

• Test LLM prompts with structured JSON schema validation
• Multi-provider comparison (OpenAI and Anthropic)
• Real-time validation with automatic retry enforcement
• Complete history tracking with filtering options
• Performance metrics monitoring (latency, token usage)
• Dark-mode interface inspired by Cursor with Monaco Editor

How It Works

Parsec's EnforcementEngine automatically retries failed validations, ensuring your LLM outputs always match your JSON schema. The enforcement process involves:

1. Prompt enhancement with schema context
2. LLM generation
3. Output validation against schemas
4. Automatic retry logic (up to 3 attempts)
5. Metrics tracking

Tech Stack