{"data":{"slug":"baml","name":"BAML","tagline":"Apache-2.0 typed DSL for LLM functions — schema-guaranteed outputs","category":"agents","categoryName":"AI Agents","url":"https://www.boundaryml.com","github":"https://github.com/BoundaryML/baml","pricing":"open-source","hook":"BAML is a small Apache-2.0 language for LLM calls — define functions and schemas, get typed outputs in Python/TS/Go instead of prompt soup and brittle JSON parse.","whatsGood":"Apache-2.0 (BoundaryML/baml). DSL + codegen for structured LLM functions with schema-guaranteed outputs, streaming, and multi-provider backends. Docs at docs.boundaryml.com; playground and VS Code tooling. Cloud/Boundary product is optional — language and runtime are OSS. ★9,350 on GitHub 2026-09-29.","theCatch":"Vs Instructor / PydanticAI / Vercel AI SDK structured outputs: those stay inside Python/TS; BAML is a separate DSL + compiler you adopt for schema-first agent I/O. Pre-1.0 energy — APIs and tooling still move; Boundary Cloud pricing is a separate lane from the Apache core.","verdict":"Apache-2.0 schema-first LLM DSL when typed agent I/O beats prompt+parse — not Instructor-in-Python, not a hosted-only agent platform.","addedAt":"2026-09-29","featured":false,"domain":"AI Agents","subSpecialty":"Agents","subcategory":"Agent Frameworks & SDKs","tags":["self-host","permissive","active"],"capabilities":[],"surfaces":["Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"Apache-2.0","githubStars":9423,"starsPerWeek":59,"access":"free","archived":false,"repo":{"createdAt":"2023-10-06","pushedAt":"2026-10-18","license":"Apache-2.0","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"claude-code","name":"Claude Code","tagline":"Terminal-first coding agent with deep repository context"},{"slug":"cursor","name":"Cursor","tagline":"The AI-first code editor that understands your codebase"},{"slug":"devin","name":"Devin","tagline":"Autonomous AI engineer for defined engineering tasks"},{"slug":"stagehand","name":"Stagehand","tagline":"AI-native browser automation that mixes code and natural language"},{"slug":"browser-use","name":"Browser Use","tagline":"Open-source framework for LLM-driven browser agents"}],"links":{"self":"/api/gems/baml","html":"/gems/baml","markdown":"/gems/baml.md","category":"/api/gems?category=agents","categoryPage":"/stacks/agents"}}