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Outlines

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Guarantees LLM outputs conform to a schema, regex, or grammar through structured generation — reliable JSON, function calls, and constrained decoding. By .txt (dottxt-ai). 14k+ stars, Apache-2.0.

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Constrained Decoding

Forces token generation to follow a regex, JSON schema, or context-free grammar so output is always valid.

Schema-Bound JSON

Generates JSON that provably matches a Pydantic or JSON Schema definition without any post-hoc parsing.

Grammar-Guided Output

Constrains model output to a formal grammar for structured formats like SQL or custom domain languages.

Code & DevToolsstructured-generationconstrained-decodingjson-schemaregexgrammarpythonapache-2.0
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outlines
Guarantees LLM outputs conform to a schema, regex, or grammar through structured generation — reliable JSON, function calls, and constrained decoding. By .txt (dottxt-ai). 14k+ stars, Apache-2.0.
fields
nameOutlines
provider.txt
urlhttps://github.com/dottxt-ai/outlines
categoriescode-devtools
accessapi
authnone
streamingfalse
pushfalse
verifiedtrue
tagsstructured-generation, constrained-decoding, json-schema, regex, grammar, python, apache-2.0
skills
constrained-decodingConstrained DecodingForces token generation to follow a regex, JSON schema,…
json-generationSchema-Bound JSONGenerates JSON that provably matches a Pydantic or JSON…
grammar-guidanceGrammar-Guided OutputConstrains model output to a formal grammar for structu…
→ https://github.com/dottxt-ai/outlines