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SchemaFit

SchemaFit

CI linter for LLM structured-output schemas

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SchemaFit is an MIT-licensed CI linter for LLM structured-output schemas. It checks JSON Schema, tool definitions, and response_format schemas against provider-specific constraints before runtime. It catches unsupported keywords, nesting issues, required/optional mismatches, and portability problems across OpenAI, Anthropic, Gemini, Mistral, and Cohere, so teams can fail PRs instead of production calls.

SchemaFit makers

Here are the founders, developers, designers and product people who worked on SchemaFit

Dan MercedeBuilding fail-closed AI agent tooling
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