Genkit JS API reference
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    Interface ModelRequest<CustomOptionsSchema>

    ModelRequest represents the parameters that are passed to a model when generating content.

    interface ModelRequest<CustomOptionsSchema extends z.ZodTypeAny = z.ZodTypeAny> {
        config?: z.TypeOf<CustomOptionsSchema>;
        docs?: {
            content: (
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text: string;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media: { contentType?: string; url: string };
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest: {
                        input?: unknown;
                        name: string;
                        partial?: boolean;
                        ref?: string;
                    };
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse: { name: string; output?: unknown; ref?: string } & {
                        content?: (
                            (...)
                            | (...)
                            | (...)
                            | (...)
                            | (...)
                            | (...)
                            | (...)
                            | (...)
                        )[];
                    };
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom: Record<string, any>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning: string;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource: { uri: string };
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
            )[];
            metadata?: Record<string, any>;
        }[];
        messages: {
            content: (
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text: string;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media: { contentType?: string; url: string };
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest: {
                        input?: unknown;
                        name: string;
                        partial?: boolean;
                        ref?: string;
                    };
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse: { name: string; output?: unknown; ref?: string } & {
                        content?: (
                            | {
                                custom?: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource?: ...;
                                text: ...;
                                toolRequest?: ...;
                                toolResponse?: ...;
                            }
                            | {
                                custom?: ...;
                                data?: ...;
                                media: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource?: ...;
                                text?: ...;
                                toolRequest?: ...;
                                toolResponse?: ...;
                            }
                            | {
                                custom?: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource?: ...;
                                text?: ...;
                                toolRequest: ...;
                                toolResponse?: ...;
                            }
                            | {
                                custom?: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource?: ...;
                                text?: ...;
                                toolRequest?: ...;
                                toolResponse: ...;
                            }
                            | {
                                custom?: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource?: ...;
                                text?: ...;
                                toolRequest?: ...;
                                toolResponse?: ...;
                            }
                            | {
                                custom: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource?: ...;
                                text?: ...;
                                toolRequest?: ...;
                                toolResponse?: ...;
                            }
                            | {
                                custom?: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning: ...;
                                resource?: ...;
                                text?: ...;
                                toolRequest?: ...;
                                toolResponse?: ...;
                            }
                            | {
                                custom?: ...;
                                data?: ...;
                                media?: ...;
                                metadata?: ...;
                                reasoning?: ...;
                                resource: ...;
                                text?: ...;
                                toolRequest?: ...;
                                toolResponse?: ...;
                            }
                        )[];
                    };
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom: Record<string, any>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning: string;
                    resource?: undefined;
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
                | {
                    custom?: Record<string, unknown>;
                    data?: unknown;
                    media?: undefined;
                    metadata?: Record<string, unknown>;
                    reasoning?: undefined;
                    resource: { uri: string };
                    text?: undefined;
                    toolRequest?: undefined;
                    toolResponse?: undefined;
                }
            )[];
            metadata?: Record<string, unknown>;
            role: "user" | "model" | "tool" | "system";
        }[];
        output?: {
            constrained?: boolean;
            contentType?: string;
            format?: string;
            schema?: Record<string, any>;
        };
        toolChoice?: "required"
        | "auto"
        | "none";
        tools?: {
            description: string;
            inputSchema?: Record<string, any> | null;
            metadata?: Record<string, any>;
            name: string;
            outputSchema?: Record<string, any> | null;
        }[];
    }

    Type Parameters

    Hierarchy (View Summary)

    Index

    Properties

    docs?: {
        content: (
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text: string;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media: { contentType?: string; url: string };
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest: {
                    input?: unknown;
                    name: string;
                    partial?: boolean;
                    ref?: string;
                };
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse: { name: string; output?: unknown; ref?: string } & {
                    content?: (
                        (...)
                        | (...)
                        | (...)
                        | (...)
                        | (...)
                        | (...)
                        | (...)
                        | (...)
                    )[];
                };
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom: Record<string, any>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning: string;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource: { uri: string };
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
        )[];
        metadata?: Record<string, any>;
    }[]
    messages: {
        content: (
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text: string;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media: { contentType?: string; url: string };
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest: {
                    input?: unknown;
                    name: string;
                    partial?: boolean;
                    ref?: string;
                };
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse: { name: string; output?: unknown; ref?: string } & {
                    content?: (
                        | {
                            custom?: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource?: ...;
                            text: ...;
                            toolRequest?: ...;
                            toolResponse?: ...;
                        }
                        | {
                            custom?: ...;
                            data?: ...;
                            media: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource?: ...;
                            text?: ...;
                            toolRequest?: ...;
                            toolResponse?: ...;
                        }
                        | {
                            custom?: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource?: ...;
                            text?: ...;
                            toolRequest: ...;
                            toolResponse?: ...;
                        }
                        | {
                            custom?: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource?: ...;
                            text?: ...;
                            toolRequest?: ...;
                            toolResponse: ...;
                        }
                        | {
                            custom?: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource?: ...;
                            text?: ...;
                            toolRequest?: ...;
                            toolResponse?: ...;
                        }
                        | {
                            custom: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource?: ...;
                            text?: ...;
                            toolRequest?: ...;
                            toolResponse?: ...;
                        }
                        | {
                            custom?: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning: ...;
                            resource?: ...;
                            text?: ...;
                            toolRequest?: ...;
                            toolResponse?: ...;
                        }
                        | {
                            custom?: ...;
                            data?: ...;
                            media?: ...;
                            metadata?: ...;
                            reasoning?: ...;
                            resource: ...;
                            text?: ...;
                            toolRequest?: ...;
                            toolResponse?: ...;
                        }
                    )[];
                };
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom: Record<string, any>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning: string;
                resource?: undefined;
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
            | {
                custom?: Record<string, unknown>;
                data?: unknown;
                media?: undefined;
                metadata?: Record<string, unknown>;
                reasoning?: undefined;
                resource: { uri: string };
                text?: undefined;
                toolRequest?: undefined;
                toolResponse?: undefined;
            }
        )[];
        metadata?: Record<string, unknown>;
        role: "user" | "model" | "tool" | "system";
    }[]
    output?: {
        constrained?: boolean;
        contentType?: string;
        format?: string;
        schema?: Record<string, any>;
    }
    toolChoice?: "required" | "auto" | "none"
    tools?: {
        description: string;
        inputSchema?: Record<string, any> | null;
        metadata?: Record<string, any>;
        name: string;
        outputSchema?: Record<string, any> | null;
    }[]