{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/ReasoningContent", "title": "ReasoningContent", "properties": { "type": { "type": "string", "const": "reasoning", "title": "Type", "description": "Indicates this is a reasoning/intermediate step.", "default": "reasoning" }, "is_native": { "type": "boolean", "title": "Is Native", "description": "Whether the reasoning content was generated by a reasoner model that processed this step." }, "reasoning": { "type": "string", "title": "Reasoning", "description": "The intermediate reasoning or thought process content." }, "signature": { "anyOf": [ { "type": "string" }, { "type": "null" } ], "title": "Signature", "description": "A unique identifier for this reasoning step." } }, "type": "object", "required": [ "is_native", "reasoning" ], "description": "Sent via the Anthropic Messages API" }