/**
 * Local declarations of the tool, schema, message and model-protocol types
 * that used to be re-exported from `ai` and `@ai-sdk/provider`.
 *
 * These are deliberately faithful to the upstream shapes rather than
 * simplified. An earlier attempt declared `Tool` with `unknown` generic
 * defaults and 66 type errors followed, because the upstream defaults are
 * `any` and that is load-bearing: `NeverOptional` resolves its
 * `0 extends 1 & N` branch under `any`, which makes `execute` and
 * `outputSchema` OPTIONAL on a bare `Tool`. That optionality is the only
 * reason a plain `Record<string, Tool>` satisfies `ToolSet`, which this
 * codebase relies on in a dozen places.
 *
 * `any` therefore appears here on purpose and nowhere else. Each use is a
 * reproduction of an upstream generic default, not a loosened annotation.
 */
import type { z } from "zod";
export type { JSONSchema7, JSONSchema7Definition } from "json-schema";
import type { JSONSchema7 } from "json-schema";
export type SchemaValidationResult<OBJECT> = {
    success: true;
    value: OBJECT;
} | {
    success: false;
    error: unknown;
};
export type Schema<OBJECT = unknown> = {
    readonly _type: OBJECT;
    readonly jsonSchema: JSONSchema7;
    readonly validate?: (value: unknown) => SchemaValidationResult<OBJECT> | PromiseLike<SchemaValidationResult<OBJECT>>;
};
export type LazySchema<OBJECT = unknown> = () => FlexibleSchema<OBJECT>;
export type ZodSchema<OBJECT = unknown> = z.ZodType<OBJECT>;
export type StandardSchema<OBJECT = unknown> = {
    readonly "~standard": {
        readonly version: 1;
        readonly vendor: string;
        readonly validate: (value: unknown) => unknown;
        readonly types?: {
            readonly input: unknown;
            readonly output: OBJECT;
        };
    };
};
export type FlexibleSchema<SCHEMA = any> = Schema<SCHEMA> | LazySchema<SCHEMA> | ZodSchema<SCHEMA> | StandardSchema<SCHEMA>;
export type InferSchema<SCHEMA> = SCHEMA extends ZodSchema<infer T> ? T : SCHEMA extends StandardSchema<infer T> ? T : SCHEMA extends LazySchema<infer T> ? T : SCHEMA extends Schema<infer T> ? T : never;
export type ToolCallOptions = {
    toolCallId: string;
    messages: ModelMessage[];
    abortSignal?: AbortSignal;
    experimental_context?: unknown;
};
export type ToolExecuteFunction<INPUT, OUTPUT> = (input: INPUT, options: ToolCallOptions) => AsyncIterable<OUTPUT> | PromiseLike<OUTPUT> | OUTPUT;
export type ToolNeedsApprovalFunction<INPUT> = (input: INPUT, options: ToolCallOptions) => boolean | PromiseLike<boolean>;
/**
 * The upstream conditional that decides whether `execute` is required.
 * Under `any` the first branch wins and everything becomes optional, which is
 * what a bare `Tool` relies on.
 */
export type NeverOptional<N, T> = 0 extends 1 & N ? Partial<T> : [N] extends [never] ? Partial<Record<keyof T, undefined>> : T;
export type ToolOutputProperties<INPUT, OUTPUT> = NeverOptional<OUTPUT, {
    execute: ToolExecuteFunction<INPUT, OUTPUT>;
    outputSchema?: FlexibleSchema<OUTPUT>;
} | {
    outputSchema: FlexibleSchema<OUTPUT>;
    execute?: never;
}>;
export type Tool<INPUT = any, OUTPUT = any> = {
    description?: string;
    title?: string;
    providerOptions?: Record<string, Record<string, unknown>>;
    inputSchema: FlexibleSchema<INPUT>;
    inputExamples?: Array<{
        input: INPUT;
    }>;
    needsApproval?: boolean | ToolNeedsApprovalFunction<INPUT>;
    strict?: boolean;
    onInputStart?: (options: ToolCallOptions) => void | PromiseLike<void>;
    onInputDelta?: (options: {
        inputTextDelta: string;
    } & ToolCallOptions) => void | PromiseLike<void>;
    onInputAvailable?: (options: {
        input: INPUT;
    } & ToolCallOptions) => void | PromiseLike<void>;
} & ToolOutputProperties<INPUT, OUTPUT> & {
    toModelOutput?: (options: {
        toolCallId: string;
        input: INPUT;
        output: OUTPUT;
    }) => unknown | PromiseLike<unknown>;
} & ({
    type?: undefined | "function";
} | {
    type: "dynamic";
} | {
    type: "provider";
    id: `${string}.${string}`;
    args: Record<string, unknown>;
    supportsDeferredResults?: boolean;
});
export type ToolSet = Record<string, (Tool<never, never> | Tool<any, any> | Tool<any, never> | Tool<never, any>) & Pick<Tool<any, any>, "execute" | "onInputAvailable" | "onInputStart" | "onInputDelta" | "needsApproval">>;
/** Upstream bounds this by `Record<string, unknown>`, not by `ToolSet`. */
export type ToolChoice<TOOLS extends Record<string, unknown>> = "auto" | "none" | "required" | {
    type: "tool";
    toolName: Extract<keyof TOOLS, string>;
};
export type InferToolInput<TOOL extends Tool> = TOOL extends Tool<infer INPUT, any> ? INPUT : never;
export type InferToolOutput<TOOL extends Tool> = TOOL extends Tool<any, infer OUTPUT> ? OUTPUT : never;
export type ToolApprovalRequest = {
    type: "tool-approval-request";
    approvalId: string;
    toolCallId: string;
};
export type ToolApprovalResponse = {
    type: "tool-approval-response";
    approvalId: string;
    approved: boolean;
    reason?: string;
    providerExecuted?: boolean;
};
export type DataContent = string | Uint8Array | ArrayBuffer | Buffer;
export type TextPart = {
    type: "text";
    text: string;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type ImagePart = {
    type: "image";
    image: DataContent | URL;
    mediaType?: string;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type FilePart = {
    type: "file";
    data: DataContent | URL;
    filename?: string;
    mediaType: string;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type ReasoningPart = {
    type: "reasoning";
    text: string;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type ToolCallPart = {
    type: "tool-call";
    toolCallId: string;
    toolName: string;
    input: unknown;
    providerExecuted?: boolean;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type ToolResultPart = {
    type: "tool-result";
    toolCallId: string;
    toolName: string;
    output: unknown;
    providerExecuted?: boolean;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type UserContent = string | Array<TextPart | ImagePart | FilePart>;
export type AssistantContent = string | Array<TextPart | FilePart | ReasoningPart | ToolCallPart | ToolResultPart | ToolApprovalRequest>;
export type ToolContent = Array<ToolResultPart | ToolApprovalResponse>;
export type SystemModelMessage = {
    role: "system";
    content: string;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type UserModelMessage = {
    role: "user";
    content: UserContent;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type AssistantModelMessage = {
    role: "assistant";
    content: AssistantContent;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type ToolModelMessage = {
    role: "tool";
    content: ToolContent;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type ModelMessage = SystemModelMessage | UserModelMessage | AssistantModelMessage | ToolModelMessage;
export type FinishReason = "stop" | "length" | "content-filter" | "tool-calls" | "error" | "other";
export type LanguageModelUsage = {
    inputTokens: number | undefined;
    outputTokens: number | undefined;
    totalTokens: number | undefined;
    inputTokenDetails?: {
        noCacheTokens?: number | undefined;
        cacheReadTokens?: number | undefined;
        cacheWriteTokens?: number | undefined;
    };
    outputTokenDetails?: {
        textTokens?: number | undefined;
        reasoningTokens?: number | undefined;
    };
    reasoningTokens?: number | undefined;
    cachedInputTokens?: number | undefined;
};
export type LanguageModelRequestMetadata = {
    body?: unknown;
};
export type LanguageModelResponseMetadata = {
    id: string;
    timestamp: Date;
    modelId: string;
    headers?: Record<string, string>;
};
export type LanguageModelV3Message = ModelMessage;
export type LanguageModelV3Prompt = ModelMessage[];
export type LanguageModelV3CallOptions = {
    prompt: LanguageModelV3Prompt;
    maxOutputTokens?: number;
    temperature?: number;
    topP?: number;
    topK?: number;
    presencePenalty?: number;
    frequencyPenalty?: number;
    stopSequences?: string[];
    seed?: number;
    tools?: Array<{
        type: "function";
        name: string;
        description?: string;
        inputSchema?: unknown;
        strict?: boolean;
        providerOptions?: Record<string, Record<string, unknown>>;
    } | {
        type: "provider-defined";
        id: string;
        name: string;
        args: Record<string, unknown>;
    }>;
    toolChoice?: LanguageModelV3ToolChoice;
    responseFormat?: {
        type: "text" | "json";
        schema?: Record<string, unknown>;
        name?: string;
        description?: string;
    };
    abortSignal?: AbortSignal;
    headers?: Record<string, string | undefined>;
    includeRawChunks?: boolean;
    providerOptions?: Record<string, Record<string, unknown>>;
};
export type LanguageModelV3ToolCall = {
    type: "tool-call";
    toolCallId: string;
    toolName: string;
    input: string;
    providerExecuted?: boolean;
};
export type LanguageModelV3Source = {
    type: "source";
    sourceType: string;
    id: string;
    url?: string;
    title?: string;
};
export type LanguageModelV3ToolChoice = {
    type: "auto";
} | {
    type: "none";
} | {
    type: "required";
} | {
    type: "tool";
    toolName: string;
};
export type LanguageModelV3Content = {
    type: "text";
    text: string;
} | {
    type: "reasoning";
    text: string;
    providerOptions?: Record<string, Record<string, unknown>>;
} | {
    type: "file";
    data: unknown;
    mediaType: string;
} | LanguageModelV3ToolCall | LanguageModelV3Source | ({
    type: "tool-result";
} & Record<string, unknown>) | ({
    type: "tool-approval-request";
} & Record<string, unknown>);
/** Per-direction token counts, as the v3 providers report them. */
export type LanguageModelV3TokenCount = {
    total?: number;
    noCache?: number;
    cacheRead?: number;
    cacheWrite?: number;
    text?: number;
    reasoning?: number;
};
export type LanguageModelV3Usage = {
    inputTokens: LanguageModelV3TokenCount;
    outputTokens: LanguageModelV3TokenCount;
};
export type LanguageModelV3FinishReason = {
    unified: FinishReason | string;
    raw?: string;
};
export type LanguageModelV3GenerateResult = {
    content: LanguageModelV3Content[];
    finishReason: LanguageModelV3FinishReason;
    usage: LanguageModelV3Usage;
    warnings?: unknown[];
    request?: unknown;
    response?: unknown;
    providerMetadata?: Record<string, Record<string, unknown>>;
};
/**
 * Discriminated rather than a loose record: consumers switch on `type` and
 * read variant-specific fields (a finish part's usage, a tool-call's input).
 */
export type LanguageModelV3StreamPart = {
    type: "text-start";
    id?: string;
} | {
    type: "text-delta";
    id?: string;
    delta: string;
} | {
    type: "text-end";
    id?: string;
} | {
    type: "reasoning-start";
    id?: string;
} | {
    type: "reasoning-delta";
    id?: string;
    delta: string;
} | {
    type: "reasoning-end";
    id?: string;
} | {
    type: "tool-call";
    toolCallId: string;
    toolName: string;
    input: string;
    providerExecuted?: boolean;
} | ({
    type: "tool-input-start";
} & Record<string, unknown>) | ({
    type: "tool-input-delta";
} & Record<string, unknown>) | ({
    type: "tool-input-end";
} & Record<string, unknown>) | ({
    type: "tool-result";
} & Record<string, unknown>) | {
    type: "source";
    sourceType: string;
    id: string;
    url?: string;
    title?: string;
} | ({
    type: "file";
} & Record<string, unknown>) | ({
    type: "stream-start";
} & Record<string, unknown>) | ({
    type: "response-metadata";
} & Record<string, unknown>) | ({
    type: "raw";
} & Record<string, unknown>) | {
    type: "error";
    error: unknown;
} | {
    type: "finish";
    finishReason: LanguageModelV3FinishReason;
    usage: LanguageModelV3Usage;
    providerMetadata?: Record<string, Record<string, unknown>>;
};
export type LanguageModelV3StreamResult = {
    stream: ReadableStream<LanguageModelV3StreamPart>;
    request?: unknown;
    response?: unknown;
};
export type LanguageModelV3 = {
    readonly specificationVersion: "v3";
    readonly provider: string;
    readonly modelId: string;
    readonly supportedUrls: Record<string, RegExp[]> | PromiseLike<Record<string, RegExp[]>>;
    doGenerate(options: LanguageModelV3CallOptions): PromiseLike<LanguageModelV3GenerateResult>;
    doStream(options: LanguageModelV3CallOptions): PromiseLike<LanguageModelV3StreamResult>;
};
export type LanguageModelV3Middleware = {
    readonly specificationVersion: "v3";
    overrideProvider?: (options: {
        model: LanguageModelV3;
    }) => string;
    overrideModelId?: (options: {
        model: LanguageModelV3;
    }) => string;
    overrideSupportedUrls?: (options: {
        model: LanguageModelV3;
    }) => Record<string, RegExp[]> | PromiseLike<Record<string, RegExp[]>>;
    transformParams?: (options: {
        type: "generate" | "stream";
        params: LanguageModelV3CallOptions;
        model: LanguageModelV3;
    }) => PromiseLike<LanguageModelV3CallOptions>;
    wrapGenerate?: (options: {
        doGenerate: () => PromiseLike<LanguageModelV3GenerateResult>;
        doStream: () => PromiseLike<LanguageModelV3StreamResult>;
        params: LanguageModelV3CallOptions;
        model: LanguageModelV3;
    }) => PromiseLike<LanguageModelV3GenerateResult>;
    wrapStream?: (options: {
        doGenerate: () => PromiseLike<LanguageModelV3GenerateResult>;
        doStream: () => PromiseLike<LanguageModelV3StreamResult>;
        params: LanguageModelV3CallOptions;
        model: LanguageModelV3;
    }) => PromiseLike<LanguageModelV3StreamResult>;
};
export type LanguageModelMiddleware = LanguageModelV3Middleware;
/** Upstream also admits a v2 model and a bare id string. */
export type LanguageModel = string | LanguageModelV3;
export type EmbeddingModel = string | Record<string, unknown>;
export type ImageModel = string | Record<string, unknown>;
export type StepResult<TOOLS extends ToolSet = ToolSet> = {
    readonly stepNumber?: number;
    readonly content: Array<{
        type: string;
    } & Record<string, unknown>>;
    readonly text: string;
    readonly reasoning?: unknown;
    readonly reasoningText?: string;
    readonly files?: unknown[];
    readonly sources?: unknown[];
    readonly toolCalls: Array<{
        toolName: string;
        toolCallId?: string;
        input?: unknown;
    } & Record<string, unknown>>;
    readonly toolResults: Array<{
        toolName?: string;
        toolCallId?: string;
        output?: unknown;
    } & Record<string, unknown>>;
    readonly stepType?: string;
    readonly finishReason: FinishReason;
    readonly rawFinishReason?: string;
    readonly usage: LanguageModelUsage;
    readonly warnings?: unknown[];
    readonly request?: LanguageModelRequestMetadata;
    readonly response?: LanguageModelResponseMetadata & {
        messages: ModelMessage[];
        body?: unknown;
    };
    readonly providerMetadata?: Record<string, Record<string, unknown>>;
    readonly tools?: TOOLS;
};
export type GenerateTextResult<TOOLS extends ToolSet = ToolSet, OUTPUT = unknown> = StepResult<TOOLS> & {
    readonly steps: Array<StepResult<TOOLS>>;
    readonly totalUsage: LanguageModelUsage;
    readonly experimental_output?: OUTPUT;
};
export type ToolCallRepairFunction<TOOLS extends ToolSet = ToolSet> = (options: {
    system: string | undefined;
    messages: ModelMessage[];
    toolCall: LanguageModelV3ToolCall;
    tools: TOOLS;
    inputSchema: (options: {
        toolName: string;
    }) => JSONSchema7;
    error: Error;
}) => Promise<LanguageModelV3ToolCall | null>;
export type PrepareStepResult<TOOLS extends Record<string, Tool> = Record<string, Tool>> = {
    model?: LanguageModel;
    toolChoice?: ToolChoice<TOOLS>;
    activeTools?: Array<keyof TOOLS>;
    system?: string;
    messages?: ModelMessage[];
    providerOptions?: Record<string, Record<string, unknown>>;
    tools?: TOOLS;
};
export type PrepareStepFunction<TOOLS extends Record<string, Tool> = Record<string, Tool>> = (options: {
    steps: Array<StepResult<ToolSet>>;
    stepNumber: number;
    model: LanguageModel;
    messages: ModelMessage[];
    maxSteps?: number;
    experimental_context?: unknown;
}) => PrepareStepResult<TOOLS> | undefined | PromiseLike<PrepareStepResult<TOOLS> | undefined>;