Genkit JS API reference
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    Class Message<T>

    Message represents a single role's contribution to a generation. Each message can contain multiple parts (for example text and an image), and each generation can contain multiple messages.

    Type Parameters

    • T = unknown

    Implements

    Index

    Constructors

    constructor

    Properties

    content metadata? parser? role

    Accessors

    data interrupts media output reasoning text toolRequests

    Methods

    toJSON toolResponseParts parse parseContent parseData

    Constructors

    • Type Parameters

      • T = unknown

      Parameters

      • message: {
            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?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text: string;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media: { contentType?: ...; url: ... };
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest: { input?: ...; name: ...; partial?: ...; ref?: ... };
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse: (...) & (...);
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom: Record<(...), (...)>;
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning: string;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource: { uri: ... };
                                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?: 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";
        }
      • Optionaloptions: { parser?: MessageParser<T> }

      Returns Message<T>

    Properties

    content

    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?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; media?: undefined; toolRequest?: undefined; toolResponse?: undefined; data?: unknown; reasoning?: undefined; resource?: undefined; } | ... 6 more ... | { ...; })[];
            };
        }
        | {
            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>
    parser?: MessageParser<T>
    role: "user" | "model" | "tool" | "system"

    Accessors

    • get data(): T | null

      Returns the first detected data part of a message.

      Returns T | null

      The first data part detected in the message (if any).

    • get interrupts(): {
          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;
      }[]

      Returns all tool requests annotated with interrupt metadata.

      Returns {
          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;
      }[]

      Array of all interrupt tool requests.

    • get media(): { contentType?: string; url: string } | null

      Returns the first media part detected in the message. Useful for extracting (for example) an image from a generation expected to create one.

      Returns { contentType?: string; url: string } | null

      The first detected media part in the message.

    • get output(): T

      Attempts to parse the content of the message according to the supplied output parser. Without a parser, returns data contained in the message or tries to parse JSON from the text of the message.

      Returns T

      The structured output contained in the message.

    • get reasoning(): string

      Concatenates all reasoning parts present in the message with no delimiter.

      Returns string

      A string of all concatenated reasoning parts.

    text

    • get text(): string

      Concatenates all text parts present in the message with no delimiter.

      Returns string

      A string of all concatenated text parts.

    • get toolRequests(): {
          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;
      }[]

      Returns all tool request found in this message.

      Returns {
          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;
      }[]

      Array of all tool request found in this message.

    Methods

    • Converts the Message to a plain JS object.

      Returns {
          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?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text: string;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media: { contentType?: ...; url: ... };
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest: { input?: ...; name: ...; partial?: ...; ref?: ... };
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse: (...) & (...);
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom: Record<(...), (...)>;
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning: string;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource: { uri: ... };
                              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?: 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";
      }

      Plain JS object representing the data contained in the message.

    • Returns {
          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: 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?: (...) | (...) } & {
                          content?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; media?: undefined; toolRequest?: undefined; toolResponse?: undefined; data?: unknown; reasoning?: undefined; resource?: undefined; } | ... 6 more ... | { ...; })[] | undefined;
                      };
                  }
                  | {
                      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;
                  }
              )[];
          };
      }[]

    • Parameters

      • lenientMessage:
            | string
            | {
                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";
            }
            | {
                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, unknown>;
                role: "user" | "model" | "tool" | "system";
            } & { content: string }

      Returns Message

    • Parameters

      • lenientPart:
            | string
            | {
                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: 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;
                        }
                        | (
                            { toolResponse: { name: string; ref?: string | undefined; output?: unknown; } & { content?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; ... 5 more ...; resource?: undefined; } | ... 6 more ... | { ...; })[] | undefined; }; ... 7 more ...; resource?: ...
                        )
                        | {
                            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;
                        }
                    )[];
                };
            }
            | {
                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;
            }
            | (
                | string
                | {
                    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?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text: string;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media: { contentType?: ...; url: ... };
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest: { input?: ...; name: ...; partial?: ...; ref?: ... };
                                toolResponse?: undefined;
                            }
                            | (
                                { toolResponse: { name: string; ref?: string | undefined; output?: unknown; } & { content?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; ... 5 more ...; resource?: undefined; } | ... 6 more ... | { ...; })[] | undefined; }; ... 7 more ...; resource?: ...
                            )
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom: Record<(...), (...)>;
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning: string;
                                resource?: undefined;
                                text?: undefined;
                                toolRequest?: undefined;
                                toolResponse?: undefined;
                            }
                            | {
                                custom?: (...)
                                | (...);
                                data?: unknown;
                                media?: undefined;
                                metadata?: (...) | (...);
                                reasoning?: undefined;
                                resource: { uri: ... };
                                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?: 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;
                }
            )[]

      Returns (
          | {
              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?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; media?: undefined; toolRequest?: undefined; toolResponse?: undefined; data?: unknown; reasoning?: undefined; resource?: undefined; } | ... 6 more ... | { ...; })[];
              };
          }
          | {
              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;
          }
      )[]

    • Parameters

      • lenientMessage:
            | string
            | {
                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";
            }
            | {
                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, unknown>;
                role: "user" | "model" | "tool" | "system";
            } & {
                content: | string
                | {
                    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?: ...;
                            }
                            | (
                                { toolResponse: { name: string; ref?: string | undefined; output?: unknown; } & { content?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; ... 5 more ...; resource?: undefined; } | ... 6 more ... | { ...; })[] | undefined; }; ... 7 more ...; resource?: ...
                            )
                            | {
                                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;
                }
                | (
                    | {
                        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?: ({ text: string; custom?: Record<string, unknown> | undefined; metadata?: Record<string, unknown> | undefined; media?: undefined; toolRequest?: undefined; toolResponse?: undefined; data?: unknown; reasoning?: undefined; resource?: undefined; } | ... 6 more ... | { ...; })[];
                        };
                    }
                    | {
                        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;
                    }
                )[];
                role: string;
            }
      • OptionaldefaultRole: "user" | "model" | "tool" | "system"

      Returns {
          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?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text: string;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media: { contentType?: ...; url: ... };
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest: { input?: ...; name: ...; partial?: ...; ref?: ... };
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse: (...) & (...);
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom: Record<(...), (...)>;
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning: string;
                              resource?: undefined;
                              text?: undefined;
                              toolRequest?: undefined;
                              toolResponse?: undefined;
                          }
                          | {
                              custom?: (...)
                              | (...);
                              data?: unknown;
                              media?: undefined;
                              metadata?: (...) | (...);
                              reasoning?: undefined;
                              resource: { uri: ... };
                              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?: 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";
      }

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