LangSchema.Converter.Google (LangSchema v0.7.1)

Converts a LangSchema into a JSON schema compatible with Gemini's Structured Outputs.

Supported JSON Schema spec

Reference: https://ai.google.dev/gemini-api/docs/structured-output

Supported types

string, number, integer, boolean, object, array, null

Supported keywords

• type, title, description, enum
• properties, required, additionalProperties
• items, prefixItems, minItems, maxItems
• minimum, maximum (number/integer)
• format (date-time, date, time for strings)
• anyOf, $ref, $defs (since Nov 2025, Gemini 2.5+)
• nullable
• propertyOrdering (Gemini 2.0+, implicit ordering in Gemini 2.5+)

Limitations

• Not all JSON Schema features are supported; unsupported properties are ignored.
• Very large or deeply nested schemas may be rejected.

LangSchema implementation status