/**
 * Defines a shared data model for AI model output.
 *
 * Responses are represented as typed parts so different providers can expose
 * text, reasoning, tool calls, files, sources, metadata, finish information, and
 * errors through one shape. The same model is used for complete responses and
 * streaming responses, where start, delta, and end parts describe content as it
 * arrives. This module also carries provider metadata and schemas used by tools
 * that need to validate response parts.
 *
 * @stability unstable
 * @since 4.0.0
 */
import type * as DateTime from "../DateTime.ts";
import * as Schema from "../Schema.ts";
import * as Tool from "./Tool.ts";
import type * as Toolkit from "./Toolkit.ts";
declare const PartTypeId: "~effect/ai/Response/Part";
/**
 * Type guard to check if a value is a Response Part.
 *
 * @stability unstable
 * @category guards
 * @since 4.0.0
 */
export declare const isPart: (u: unknown) => u is AnyPart;
/**
 * Union type representing all possible response content parts.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type AnyPart = TextPart | TextStartPart | TextDeltaPart | TextEndPart | ReasoningPart | ReasoningStartPart | ReasoningDeltaPart | ReasoningEndPart | ToolParamsStartPart | ToolParamsDeltaPart | ToolParamsEndPart | ToolCallPart<any, any> | ToolResultPart<any, any, any> | ToolApprovalRequestPart | FilePart | DocumentSourcePart | UrlSourcePart | ResponseMetadataPart | FinishPart | ErrorPart;
/**
 * Encoded representation of all possible response content parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type AnyPartEncoded = TextPartEncoded | TextStartPartEncoded | TextDeltaPartEncoded | TextEndPartEncoded | ReasoningPartEncoded | ReasoningStartPartEncoded | ReasoningDeltaPartEncoded | ReasoningEndPartEncoded | ToolParamsStartPartEncoded | ToolParamsDeltaPartEncoded | ToolParamsEndPartEncoded | ToolCallPartEncoded | ToolResultPartEncoded | ToolApprovalRequestPartEncoded | FilePartEncoded | DocumentSourcePartEncoded | UrlSourcePartEncoded | ResponseMetadataPartEncoded | FinishPartEncoded | ErrorPartEncoded;
/**
 * Union type for all response parts with tool-specific typing.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type AllParts<Tools extends Record<string, Tool.Any>> = TextPart | TextStartPart | TextDeltaPart | TextEndPart | ReasoningPart | ReasoningStartPart | ReasoningDeltaPart | ReasoningEndPart | ToolParamsStartPart | ToolParamsDeltaPart | ToolParamsEndPart | ToolCallParts<Tools> | ToolResultParts<Tools> | ToolApprovalRequestPart | FilePart | DocumentSourcePart | UrlSourcePart | ResponseMetadataPart | FinishPart | ErrorPart;
/**
 * Encoded representation of all response parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type AllPartsEncoded = TextPartEncoded | TextStartPartEncoded | TextDeltaPartEncoded | TextEndPartEncoded | ReasoningPartEncoded | ReasoningStartPartEncoded | ReasoningDeltaPartEncoded | ReasoningEndPartEncoded | ToolParamsStartPartEncoded | ToolParamsDeltaPartEncoded | ToolParamsEndPartEncoded | ToolCallPartEncoded | ToolResultPartEncoded | ToolApprovalRequestPartEncoded | FilePartEncoded | DocumentSourcePartEncoded | UrlSourcePartEncoded | ResponseMetadataPartEncoded | FinishPartEncoded | ErrorPartEncoded;
type AnyToolParts = ToolCallPart<string, unknown> | ToolResultPart<string, unknown, unknown>;
/**
 * Creates a Schema for all response parts based on a toolkit.
 *
 * **Details**
 *
 * Generates a schema that includes all possible response parts, with tool call
 * and tool result parts dynamically created based on the provided toolkit.
 *
 * When no toolkit is provided, tool call and tool result parts accept any tool
 * name, with parameters and results decoded as `unknown`.
 *
 * **Example** (Building a response parts schema)
 *
 * ```ts import.meta.vitest
 * import { Schema } from "effect"
 * import { Response, Tool, Toolkit } from "effect/ai"
 *
 * const myToolkit = Toolkit.make(
 *   Tool.make("GetWeather", {
 *     parameters: Schema.Struct({ city: Schema.String }),
 *     success: Schema.Struct({ temperature: Schema.Number })
 *   })
 * )
 *
 * const allPartsSchema = Response.AllParts(myToolkit)
 * Schema.isSchema(allPartsSchema) // => true
 *
 * const anyToolPartsSchema = Response.AllParts()
 * Schema.isSchema(anyToolPartsSchema) // => true
 * ```
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const AllParts: {
    /**
     * Creates a Schema for all response parts based on a toolkit.
     *
     * **Details**
     *
     * Generates a schema that includes all possible response parts, with tool call
     * and tool result parts dynamically created based on the provided toolkit.
     *
     * When no toolkit is provided, tool call and tool result parts accept any tool
     * name, with parameters and results decoded as `unknown`.
     *
     * **Example** (Building a response parts schema)
     *
     * ```ts import.meta.vitest
     * import { Schema } from "effect"
     * import { Response, Tool, Toolkit } from "effect/ai"
     *
     * const myToolkit = Toolkit.make(
     *   Tool.make("GetWeather", {
     *     parameters: Schema.Struct({ city: Schema.String }),
     *     success: Schema.Struct({ temperature: Schema.Number })
     *   })
     * )
     *
     * const allPartsSchema = Response.AllParts(myToolkit)
     * Schema.isSchema(allPartsSchema) // => true
     *
     * const anyToolPartsSchema = Response.AllParts()
     * Schema.isSchema(anyToolPartsSchema) // => true
     * ```
     *
     * @stability unstable
     * @category schemas
     * @since 4.0.0
     */
    <T extends Toolkit.Any | Toolkit.WithHandler<any>>(toolkit: T): Schema.Codec<AllParts<T extends Toolkit.Any ? Toolkit.Tools<T> : Toolkit.WithHandlerTools<T>>, AllPartsEncoded, Tool.ResultDecodingServices<Toolkit.Tools<T>[keyof Toolkit.Tools<T>]>, Tool.ResultEncodingServices<Toolkit.Tools<T>[keyof Toolkit.Tools<T>]>>;
    /**
     * Creates a Schema for all response parts based on a toolkit.
     *
     * **Details**
     *
     * Generates a schema that includes all possible response parts, with tool call
     * and tool result parts dynamically created based on the provided toolkit.
     *
     * When no toolkit is provided, tool call and tool result parts accept any tool
     * name, with parameters and results decoded as `unknown`.
     *
     * **Example** (Building a response parts schema)
     *
     * ```ts import.meta.vitest
     * import { Schema } from "effect"
     * import { Response, Tool, Toolkit } from "effect/ai"
     *
     * const myToolkit = Toolkit.make(
     *   Tool.make("GetWeather", {
     *     parameters: Schema.Struct({ city: Schema.String }),
     *     success: Schema.Struct({ temperature: Schema.Number })
     *   })
     * )
     *
     * const allPartsSchema = Response.AllParts(myToolkit)
     * Schema.isSchema(allPartsSchema) // => true
     *
     * const anyToolPartsSchema = Response.AllParts()
     * Schema.isSchema(anyToolPartsSchema) // => true
     * ```
     *
     * @stability unstable
     * @category schemas
     * @since 4.0.0
     */
    (): Schema.Codec<AllParts<{}> | AnyToolParts, AllPartsEncoded>;
};
/**
 * A type for representing non-streaming response parts with tool-specific
 * typing.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type Part<Tools extends Record<string, Tool.Any>, ParametersMode extends ToolParametersMode = "decoded"> = TextPart | ReasoningPart | ToolCallParts<Tools, ParametersMode> | ToolResultParts<Tools> | ToolApprovalRequestPart | FilePart | DocumentSourcePart | UrlSourcePart | ResponseMetadataPart | FinishPart;
/**
 * Encoded representation of non-streaming response parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type PartEncoded = TextPartEncoded | ReasoningPartEncoded | ReasoningDeltaPartEncoded | ReasoningEndPartEncoded | ToolCallPartEncoded | ToolResultPartEncoded | ToolApprovalRequestPartEncoded | FilePartEncoded | DocumentSourcePartEncoded | UrlSourcePartEncoded | ResponseMetadataPartEncoded | FinishPartEncoded;
/**
 * Creates a Schema for non-streaming response parts based on a toolkit.
 *
 * **Details**
 *
 * When no toolkit is provided, tool call and tool result parts accept any tool
 * name, with parameters and results decoded as `unknown`.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const Part: {
    /**
     * Creates a Schema for non-streaming response parts based on a toolkit.
     *
     * **Details**
     *
     * When no toolkit is provided, tool call and tool result parts accept any tool
     * name, with parameters and results decoded as `unknown`.
     *
     * @stability unstable
     * @category schemas
     * @since 4.0.0
     */
    <T extends Toolkit.Any | Toolkit.WithHandler<any>>(toolkit: T): Schema.Codec<Part<T extends Toolkit.Any ? Toolkit.Tools<T> : Toolkit.WithHandlerTools<T>>, PartEncoded, Tool.ResultDecodingServices<Toolkit.Tools<T>[keyof Toolkit.Tools<T>]>, Tool.ResultEncodingServices<Toolkit.Tools<T>[keyof Toolkit.Tools<T>]>>;
    /**
     * Creates a Schema for non-streaming response parts based on a toolkit.
     *
     * **Details**
     *
     * When no toolkit is provided, tool call and tool result parts accept any tool
     * name, with parameters and results decoded as `unknown`.
     *
     * @stability unstable
     * @category schemas
     * @since 4.0.0
     */
    (): Schema.Codec<Part<{}> | AnyToolParts, PartEncoded>;
};
/**
 * A type for representing streaming response parts with tool-specific typing.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type StreamPart<Tools extends Record<string, Tool.Any>, ParametersMode extends ToolParametersMode = "decoded"> = TextStartPart | TextDeltaPart | TextEndPart | ReasoningStartPart | ReasoningDeltaPart | ReasoningEndPart | ToolParamsStartPart | ToolParamsDeltaPart | ToolParamsEndPart | ToolCallParts<Tools, ParametersMode> | ToolResultParts<Tools> | ToolApprovalRequestPart | FilePart | DocumentSourcePart | UrlSourcePart | ResponseMetadataPart | FinishPart | ErrorPart;
/**
 * Encoded representation of streaming response parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type StreamPartEncoded = TextStartPartEncoded | TextDeltaPartEncoded | TextEndPartEncoded | ReasoningStartPartEncoded | ReasoningDeltaPartEncoded | ReasoningEndPartEncoded | ToolParamsStartPartEncoded | ToolParamsDeltaPartEncoded | ToolParamsEndPartEncoded | ToolCallPartEncoded | ToolResultPartEncoded | ToolApprovalRequestPartEncoded | FilePartEncoded | DocumentSourcePartEncoded | UrlSourcePartEncoded | ResponseMetadataPartEncoded | FinishPartEncoded | ErrorPartEncoded;
/**
 * Creates a Schema for streaming response parts based on a toolkit.
 *
 * **Details**
 *
 * When no toolkit is provided, tool call and tool result parts accept any tool
 * name, with parameters and results decoded as `unknown`.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const StreamPart: {
    /**
     * Creates a Schema for streaming response parts based on a toolkit.
     *
     * **Details**
     *
     * When no toolkit is provided, tool call and tool result parts accept any tool
     * name, with parameters and results decoded as `unknown`.
     *
     * @stability unstable
     * @category schemas
     * @since 4.0.0
     */
    <T extends Toolkit.Any | Toolkit.WithHandler<any>>(toolkit: T): Schema.Codec<StreamPart<T extends Toolkit.Any ? Toolkit.Tools<T> : Toolkit.WithHandlerTools<T>>, StreamPartEncoded, Tool.ResultDecodingServices<Toolkit.Tools<T>[keyof Toolkit.Tools<T>]>, Tool.ResultEncodingServices<Toolkit.Tools<T>[keyof Toolkit.Tools<T>]>>;
    /**
     * Creates a Schema for streaming response parts based on a toolkit.
     *
     * **Details**
     *
     * When no toolkit is provided, tool call and tool result parts accept any tool
     * name, with parameters and results decoded as `unknown`.
     *
     * @stability unstable
     * @category schemas
     * @since 4.0.0
     */
    (): Schema.Codec<StreamPart<{}> | AnyToolParts, StreamPartEncoded>;
};
/**
 * Utility type that extracts tool call parts from a set of tools.
 *
 * @stability unstable
 * @category utility types
 * @since 4.0.0
 */
export type ToolCallParts<Tools extends Record<string, Tool.Any>, ParametersMode extends ToolParametersMode = "decoded"> = ParametersMode extends "deferred" ? ToolCallPartForName<Tools, "opaque", keyof Tools> | ToolCallPart<string, unknown> : ToolCallPartForName<Tools, ParametersMode, keyof Tools>;
/**
 * Controls tool parameter decoding. `"deferred"` allows undeclared tool names
 * with opaque parameters, leaving validation to the caller.
 *
 * @stability unstable
 * @category utility types
 * @since 4.0.0
 */
export type ToolParametersMode = "decoded" | "encoded" | "opaque" | "deferred";
type ToolCallPartForName<Tools extends Record<string, Tool.Any>, ParametersMode extends ToolParametersMode, Name extends keyof Tools> = Name extends string ? ToolCallPart<Name, ParametersMode extends "encoded" ? Tool.ParametersEncoded<Tools[Name]> : ParametersMode extends "opaque" ? unknown : Tool.Parameters<Tools[Name]>> : never;
/**
 * Utility type that extracts tool result parts from a set of tools.
 *
 * @stability unstable
 * @category utility types
 * @since 4.0.0
 */
export type ToolResultParts<Tools extends Record<string, Tool.Any>> = ToolResultPartForName<Tools, keyof Tools>;
type ToolResultPartForName<Tools extends Record<string, Tool.Any>, Name extends keyof Tools> = Name extends string ? ToolResultPart<Name, Tool.Success<Tools[Name]>, Tool.FailureResult<Tools[Name]>> : never;
/**
 * Schema for provider-specific metadata attached to response parts,
 * represented as a record from provider-specific keys to JSON values or `null`.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ProviderMetadata: Schema.$Record<Schema.String, Schema.NullOr<Schema.Codec<Schema.Json>>>;
/**
 * Type of provider-specific metadata attached to response parts, keyed by
 * provider-specific names with JSON or `null` values.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type ProviderMetadata = typeof ProviderMetadata.Type;
/**
 * Base interface for all response content parts, including the type identifier
 * and optional metadata.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface BasePart<Type extends string, Metadata extends ProviderMetadata> {
    readonly [PartTypeId]: typeof PartTypeId;
    /**
     * The type of this response part.
     */
    readonly type: Type;
    /**
     * Optional provider-specific metadata for this part.
     */
    readonly metadata: Metadata;
}
/**
 * Base interface for encoded response content parts.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface BasePartEncoded<Type extends string, Metadata extends ProviderMetadata> {
    /**
     * The type of this response part.
     */
    readonly type: Type;
    /**
     * Optional provider-specific metadata for this part.
     */
    readonly metadata?: Metadata | undefined;
}
/**
 * Creates a new response content part of the specified type.
 *
 * **Example** (Creating response content parts)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const textPart = Response.makePart("text", {
 *   text: "Hello, world!"
 * })
 *
 * const toolCallPart = Response.makePart("tool-call", {
 *   id: "call_123",
 *   name: "get_weather",
 *   params: { city: "San Francisco" },
 *   providerExecuted: false
 * })
 *
 * const result = [textPart.type, toolCallPart.name] // => ["text", "get_weather"]
 * ```
 *
 * @stability unstable
 * @category constructors
 * @since 4.0.0
 */
export declare const makePart: <const Type extends AnyPart["type"]>(
/**
 * The type of part to create.
 */
type: Type, 
/**
 * Parameters specific to the part type being created.
 */
params: Omit<Extract<AnyPart, {
    type: Type;
}>, typeof PartTypeId | "type" | "metadata"> & {
    /**
     * Optional provider-specific metadata for this part.
     */
    readonly metadata?: Extract<AnyPart, {
        type: Type;
    }>["metadata"] | undefined;
}) => Extract<AnyPart, {
    type: Type;
}>;
/**
 * A utility type for specifying the parameters required to construct a
 * specific response part.
 *
 * @stability unstable
 * @category utility types
 * @since 4.0.0
 */
export type ConstructorParams<Part extends AnyPart> = Omit<Part, typeof PartTypeId | "type" | "sourceType" | "metadata"> & {
    /**
     * Optional provider-specific metadata for this part.
     */
    readonly metadata?: Part["metadata"] | undefined;
};
/**
 * Response part representing plain text content.
 *
 * **Example** (Creating a text part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const textPart: Response.TextPart = Response.makePart("text", {
 *   text: "The answer to your question is 42."
 * })
 * textPart.text // => "The answer to your question is 42."
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextPart extends BasePart<"text", TextPartMetadata> {
    /**
     * The text content.
     */
    readonly text: string;
}
/**
 * Encoded representation of text parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextPartEncoded extends BasePartEncoded<"text", TextPartMetadata> {
    /**
     * The text content.
     */
    readonly text: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `TextPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface TextPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of text parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const TextPart: Schema.Struct<{
    readonly type: Schema.tag<"text">;
    readonly text: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating the start of streaming text content with a unique
 * text chunk identifier.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextStartPart extends BasePart<"text-start", TextStartPartMetadata> {
    /**
     * Unique identifier for this text chunk.
     */
    readonly id: string;
}
/**
 * Encoded representation of text start parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextStartPartEncoded extends BasePartEncoded<"text-start", TextStartPartMetadata> {
    /**
     * Unique identifier for this text chunk.
     */
    readonly id: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `TextStartPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface TextStartPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of text start parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const TextStartPart: Schema.Struct<{
    readonly type: Schema.tag<"text-start">;
    readonly id: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part containing incremental text content to be added to the existing
 * text chunk with the same unique identifier.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextDeltaPart extends BasePart<"text-delta", TextDeltaPartMetadata> {
    /**
     * Unique identifier matching the corresponding text chunk.
     */
    readonly id: string;
    /**
     * The incremental text content to add.
     */
    readonly delta: string;
}
/**
 * Encoded representation of text delta parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextDeltaPartEncoded extends BasePartEncoded<"text-delta", TextDeltaPartMetadata> {
    /**
     * Unique identifier matching the corresponding text chunk.
     */
    readonly id: string;
    /**
     * The incremental text content to add.
     */
    readonly delta: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `TextDeltaPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface TextDeltaPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of text delta parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const TextDeltaPart: Schema.Struct<{
    readonly type: Schema.tag<"text-delta">;
    readonly id: Schema.String;
    readonly delta: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating the completion of a streaming text chunk.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextEndPart extends BasePart<"text-end", TextEndPartMetadata> {
    /**
     * Unique identifier matching the corresponding text chunk.
     */
    readonly id: string;
}
/**
 * Encoded representation of text end parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface TextEndPartEncoded extends BasePartEncoded<"text-end", TextEndPartMetadata> {
    /**
     * Unique identifier matching the corresponding text chunk.
     */
    readonly id: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `TextEndPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface TextEndPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of text end parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const TextEndPart: Schema.Struct<{
    readonly type: Schema.tag<"text-end">;
    readonly id: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part carrying provider-supplied reasoning text, such as an exposed
 * reasoning summary or explanation. Do not assume it contains hidden
 * chain-of-thought.
 *
 * **Example** (Creating a reasoning part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const reasoningPart: Response.ReasoningPart = Response.makePart("reasoning", {
 *   text:
 *     "Let me think step by step: First I need to analyze the user's question..."
 * })
 * reasoningPart.type // => "reasoning"
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningPart extends BasePart<"reasoning", ReasoningPartMetadata> {
    /**
     * The reasoning or thought process text.
     */
    readonly text: string;
}
/**
 * Encoded representation of reasoning parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningPartEncoded extends BasePartEncoded<"reasoning", ReasoningPartMetadata> {
    /**
     * The reasoning or thought process text.
     */
    readonly text: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ReasoningPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ReasoningPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of reasoning parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ReasoningPart: Schema.Struct<{
    readonly type: Schema.tag<"reasoning">;
    readonly text: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating the start of streaming reasoning content with a
 * unique reasoning chunk identifier.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningStartPart extends BasePart<"reasoning-start", ReasoningStartPartMetadata> {
    /**
     * Unique identifier for this reasoning chunk.
     */
    readonly id: string;
}
/**
 * Encoded representation of reasoning start parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningStartPartEncoded extends BasePartEncoded<"reasoning-start", ReasoningStartPartMetadata> {
    /**
     * Unique identifier for this reasoning stream.
     */
    readonly id: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ReasoningStartPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ReasoningStartPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of reasoning start parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ReasoningStartPart: Schema.Struct<{
    readonly type: Schema.tag<"reasoning-start">;
    readonly id: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part containing incremental reasoning content to be added to the
 * existing chunk of reasoning text with the same unique identifier.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningDeltaPart extends BasePart<"reasoning-delta", ReasoningDeltaPartMetadata> {
    /**
     * Unique identifier matching the corresponding reasoning chunk.
     */
    readonly id: string;
    /**
     * The incremental reasoning content to add.
     */
    readonly delta: string;
}
/**
 * Encoded representation of reasoning delta parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningDeltaPartEncoded extends BasePartEncoded<"reasoning-delta", ReasoningDeltaPartMetadata> {
    /**
     * Unique identifier matching the corresponding reasoning chunk.
     */
    readonly id: string;
    /**
     * The incremental reasoning content to add.
     */
    readonly delta: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ReasoningDeltaPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ReasoningDeltaPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of reasoning delta parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ReasoningDeltaPart: Schema.Struct<{
    readonly type: Schema.tag<"reasoning-delta">;
    readonly id: Schema.String;
    readonly delta: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating the completion of a streaming reasoning chunk.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningEndPart extends BasePart<"reasoning-end", ReasoningEndPartMetadata> {
    /**
     * Unique identifier matching the corresponding reasoning chunk.
     */
    readonly id: string;
}
/**
 * Encoded representation of reasoning end parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ReasoningEndPartEncoded extends BasePartEncoded<"reasoning-end", ReasoningEndPartMetadata> {
    /**
     * Unique identifier matching the corresponding reasoning chunk.
     */
    readonly id: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ReasoningEndPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ReasoningEndPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of reasoning end parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ReasoningEndPart: Schema.Struct<{
    readonly type: Schema.tag<"reasoning-end">;
    readonly id: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating the start of streaming tool parameters.
 *
 * **Details**
 *
 * Marks the beginning of tool parameter streaming with metadata about the tool
 * call.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolParamsStartPart extends BasePart<"tool-params-start", ToolParamsStartPartMetadata> {
    /**
     * Unique identifier for this tool parameter chunk.
     */
    readonly id: string;
    /**
     * Name of the tool being called, which corresponds to the name of the tool
     * in the `Toolkit` included with the request.
     */
    readonly name: string;
    /**
     * Whether the tool was executed by the provider (true) or framework (false).
     */
    readonly providerExecuted: boolean;
}
/**
 * Encoded representation of tool params start parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolParamsStartPartEncoded extends BasePartEncoded<"tool-params-start", ToolParamsStartPartMetadata> {
    /**
     * Unique identifier for this tool parameter chunk.
     */
    readonly id: string;
    /**
     * Name of the tool being called, which corresponds to the name of the tool
     * in the `Toolkit` included with the request.
     */
    readonly name: string;
    /**
     * Whether the tool was executed by the provider (true) or framework (false).
     */
    readonly providerExecuted?: boolean;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ToolParamsStartPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ToolParamsStartPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of tool params start parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ToolParamsStartPart: Schema.Struct<{
    readonly type: Schema.tag<"tool-params-start">;
    readonly id: Schema.String;
    readonly name: Schema.String;
    readonly providerExecuted: Schema.withDecodingDefaultKey<Schema.Boolean>;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part containing incremental tool parameter content.
 *
 * **Details**
 *
 * Represents a chunk of tool parameters being streamed, containing the
 * incremental JSON content that forms the tool parameters.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolParamsDeltaPart extends BasePart<"tool-params-delta", ToolParamsDeltaPartMetadata> {
    /**
     * Unique identifier matching the corresponding tool parameter chunk.
     */
    readonly id: string;
    /**
     * The incremental parameter content (typically JSON fragment) to add.
     */
    readonly delta: string;
}
/**
 * Encoded representation of tool params delta parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolParamsDeltaPartEncoded extends BasePartEncoded<"tool-params-delta", ToolParamsDeltaPartMetadata> {
    /**
     * Unique identifier matching the corresponding tool parameter chunk.
     */
    readonly id: string;
    /**
     * The incremental parameter content (typically JSON fragment) to add.
     */
    readonly delta: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ToolParamsDeltaPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ToolParamsDeltaPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of tool params delta parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ToolParamsDeltaPart: Schema.Struct<{
    readonly type: Schema.tag<"tool-params-delta">;
    readonly id: Schema.String;
    readonly delta: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating the end of streaming tool parameters.
 *
 * **Details**
 *
 * Marks the completion of a tool parameter stream, indicating that all
 * parameter data has been sent and the tool call is ready to be executed.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolParamsEndPart extends BasePart<"tool-params-end", ToolParamsEndPartMetadata> {
    /**
     * Unique identifier matching the corresponding tool parameter chunk.
     */
    readonly id: string;
}
/**
 * Encoded representation of tool params end parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolParamsEndPartEncoded extends BasePartEncoded<"tool-params-end", ToolParamsEndPartMetadata> {
    /**
     * Unique identifier matching the corresponding tool parameter stream.
     */
    readonly id: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ToolParamsEndPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ToolParamsEndPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of tool params end parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ToolParamsEndPart: Schema.Struct<{
    readonly type: Schema.tag<"tool-params-end">;
    readonly id: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part representing a tool call request.
 *
 * **Example** (Creating a tool call part)
 *
 * ```ts import.meta.vitest
 * import { Schema } from "effect"
 * import { Response } from "effect/ai"
 *
 * const weatherParams = Schema.Struct({
 *   city: Schema.String,
 *   units: Schema.optional(Schema.Literals(["celsius", "fahrenheit"]))
 * })
 *
 * const toolCallPart: Response.ToolCallPart<
 *   "get_weather",
 *   {
 *     readonly city: string
 *     readonly units?: "celsius" | "fahrenheit"
 *   }
 * > = Response.makePart("tool-call", {
 *   id: "call_123",
 *   name: "get_weather",
 *   params: { city: "San Francisco", units: "celsius" },
 *   providerExecuted: false
 * })
 * const result = [toolCallPart.name, toolCallPart.params.city] // => ["get_weather", "San Francisco"]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolCallPart<Name extends string, Params> extends BasePart<"tool-call", ToolCallPartMetadata> {
    /**
     * Unique identifier for this tool call.
     */
    readonly id: string;
    /**
     * Name of the tool being called, which corresponds to the name of the tool
     * in the `Toolkit` included with the request.
     */
    readonly name: Name;
    /**
     * Parameters to pass to the tool.
     */
    readonly params: Params;
    /**
     * Whether the tool was executed by the provider (true) or framework (false).
     */
    readonly providerExecuted: boolean;
}
/**
 * Encoded representation of tool call parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolCallPartEncoded extends BasePartEncoded<"tool-call", ToolCallPartMetadata> {
    /**
     * Unique identifier for this tool call.
     */
    readonly id: string;
    /**
     * Name of the tool being called, which corresponds to the name of the tool
     * in the `Toolkit` included with the request.
     */
    readonly name: string;
    /**
     * Parameters to pass to the tool.
     */
    readonly params: unknown;
    /**
     * Whether the tool was executed by the provider (true) or framework (false).
     */
    readonly providerExecuted?: boolean | undefined;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ToolCallPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ToolCallPartMetadata extends ProviderMetadata {
}
/**
 * Creates a Schema for tool call parts with specific tool name and parameters.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ToolCallPart: <const Name extends string, Params extends Schema.Constraint>(name: Name, params: Params) => Schema.Struct<{
    readonly type: Schema.Literal<"tool-call">;
    readonly id: Schema.String;
    readonly name: Schema.Literal<Name>;
    readonly params: Params;
    readonly providerExecuted: Schema.withDecodingDefaultKey<Schema.Boolean>;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Constructs a new tool call part.
 *
 * @stability unstable
 * @category constructors
 * @since 4.0.0
 */
export declare const toolCallPart: <const Name extends string, Params>(params: ConstructorParams<ToolCallPart<Name, Params>>) => ToolCallPart<Name, Params>;
/**
 * The base fields of a tool result part.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface BaseToolResult<Name extends string> extends BasePart<"tool-result", ToolResultPartMetadata> {
    /**
     * Unique identifier matching the original tool call.
     */
    readonly id: string;
    /**
     * Name of the tool being called, which corresponds to the name of the tool
     * in the `Toolkit` included with the request.
     */
    readonly name: Name;
    /**
     * The encoded result for serialization purposes.
     */
    readonly encodedResult: unknown;
    /**
     * Whether the tool was executed by the provider (true) or framework (false).
     */
    readonly providerExecuted: boolean;
    /**
     * Whether this is a preliminary (intermediate) result.
     *
     * **Details**
     *
     * Preliminary results represent progress updates during streaming tool
     * execution. Only the final result (where `preliminary` is `false` or
     * `undefined`) should be used as the authoritative output.
     *
     * **Gotchas**
     *
     * Only applicable for framework-executed tools during streaming.
     */
    readonly preliminary: boolean;
}
/**
 * Represents a successful tool call result.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolResultSuccess<Name extends string, Success> extends BaseToolResult<Name> {
    /**
     * The decoded success returned by the tool execution.
     */
    readonly result: Success;
    /**
     * Whether or not the result of executing the tool call handler was an error.
     */
    readonly isFailure: false;
}
/**
 * Represents a failed tool call result.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolResultFailure<Name extends string, Failure> extends BaseToolResult<Name> {
    /**
     * The decoded failure returned by the tool execution.
     */
    readonly result: Failure;
    /**
     * Whether or not the result of executing the tool call handler was an error.
     */
    readonly isFailure: true;
}
/**
 * Response part representing the result of a tool call.
 *
 * **Example** (Creating a tool result part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * interface WeatherData {
 *   temperature: number
 *   condition: string
 *   humidity: number
 * }
 *
 * const toolResultPart: Response.ToolResultPart<
 *   "get_weather",
 *   WeatherData,
 *   never
 * > = Response.toolResultPart({
 *   id: "call_123",
 *   name: "get_weather",
 *   isFailure: false,
 *   result: {
 *     temperature: 22,
 *     condition: "sunny",
 *     humidity: 65
 *   },
 *   encodedResult: {
 *     temperature: 22,
 *     condition: "sunny",
 *     humidity: 65
 *   },
 *   providerExecuted: false,
 *   preliminary: false
 * })
 * const result = [toolResultPart.name, toolResultPart.result.temperature] // => ["get_weather", 22]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type ToolResultPart<Name extends string, Success, Failure> = ToolResultSuccess<Name, Success> | ToolResultFailure<Name, Failure>;
/**
 * Encoded representation of tool result parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolResultPartEncoded extends BasePartEncoded<"tool-result", ToolResultPartMetadata> {
    /**
     * Unique identifier matching the original tool call.
     */
    readonly id: string;
    /**
     * Name of the tool being called, which corresponds to the name of the tool
     * in the `Toolkit` included with the request.
     */
    readonly name: string;
    /**
     * The result returned by the tool execution.
     */
    readonly result: unknown;
    /**
     * Whether or not the result of executing the tool call handler was an error.
     */
    readonly isFailure: boolean;
    /**
     * Whether the tool was executed by the provider (true) or framework (false).
     */
    readonly providerExecuted?: boolean | undefined;
    /**
     * Whether this is a preliminary (intermediate) result.
     *
     * **Gotchas**
     *
     * Only applicable for framework-executed tools during streaming.
     */
    readonly preliminary?: boolean | undefined;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ToolResultPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ToolResultPartMetadata extends ProviderMetadata {
}
/**
 * Creates a Schema for tool result parts with specific tool name and result type.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ToolResultPart: <const Name extends string, Success extends Schema.Constraint, Failure extends Schema.Constraint>(name: Name, success: Success, failure: Failure) => Schema.Codec<ToolResultPart<Name, Success["Type"], Failure["Type"]>, ToolResultPartEncoded, Success["DecodingServices"] | Failure["DecodingServices"], Success["EncodingServices"] | Failure["EncodingServices"]>;
/**
 * Constructs a new tool result part.
 *
 * @stability unstable
 * @category constructors
 * @since 4.0.0
 */
export declare const toolResultPart: <const Params extends ConstructorParams<ToolResultPart<string, unknown, unknown>>>(params: Params) => Params extends {
    readonly name: infer Name extends string;
    readonly isFailure: false;
    readonly result: infer Success;
} ? ToolResultPart<Name, Success, never> : Params extends {
    readonly name: infer Name extends string;
    readonly isFailure: true;
    readonly result: infer Failure;
} ? ToolResultPart<Name, never, Failure> : never;
/**
 * Response part representing a tool approval request.
 *
 * **Details**
 *
 * Emitted when a tool requires user approval before execution. The framework
 * checks the tool's `needsApproval` property and emits this part instead of
 * executing the tool when approval is required.
 *
 * **Example** (Creating an approval request part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const approvalRequest: Response.ToolApprovalRequestPart = Response.makePart(
 *   "tool-approval-request",
 *   {
 *     approvalId: "approval_123",
 *     toolCallId: "call_456"
 *   }
 * )
 * const result = [approvalRequest.approvalId, approvalRequest.toolCallId] // => ["approval_123", "call_456"]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolApprovalRequestPart extends BasePart<"tool-approval-request", ToolApprovalRequestPartMetadata> {
    /**
     * Unique identifier for this approval flow.
     */
    readonly approvalId: string;
    /**
     * The tool call ID requiring approval.
     */
    readonly toolCallId: string;
}
/**
 * Encoded representation of tool approval request parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ToolApprovalRequestPartEncoded extends BasePartEncoded<"tool-approval-request", ToolApprovalRequestPartMetadata> {
    /**
     * Unique identifier for this approval flow.
     */
    readonly approvalId: string;
    /**
     * The tool call ID requiring approval.
     */
    readonly toolCallId: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ToolApprovalRequestPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ToolApprovalRequestPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of tool approval request parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ToolApprovalRequestPart: Schema.Struct<{
    readonly type: Schema.tag<"tool-approval-request">;
    readonly approvalId: Schema.String;
    readonly toolCallId: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Constructs a new tool approval request part.
 *
 * @stability unstable
 * @category constructors
 * @since 4.0.0
 */
export declare const toolApprovalRequestPart: (params: ConstructorParams<ToolApprovalRequestPart>) => ToolApprovalRequestPart;
/**
 * Response part representing a file attachment.
 *
 * **Details**
 *
 * Supports various file types including images, documents, and binary data.
 *
 * **Example** (Creating a file part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const imagePart: Response.FilePart = Response.makePart("file", {
 *   mediaType: "image/jpeg",
 *   data: new Uint8Array([1, 2, 3])
 * })
 * const result = [imagePart.mediaType, imagePart.data] // => ["image/jpeg", new Uint8Array([1, 2, 3])]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface FilePart extends BasePart<"file", FilePartMetadata> {
    /**
     * MIME type of the file (e.g., "image/jpeg", "application/pdf").
     */
    readonly mediaType: string;
    /**
     * File data as a byte array.
     */
    readonly data: Uint8Array;
}
/**
 * Encoded representation of file parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface FilePartEncoded extends BasePartEncoded<"file", FilePartMetadata> {
    /**
     * MIME type of the file (e.g., "image/jpeg", "application/pdf").
     */
    readonly mediaType: string;
    /**
     * File data as a base64 string.
     */
    readonly data: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `FilePart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface FilePartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of file parts.
 *
 * **Details**
 *
 * Decoded `data` is a `Uint8Array`; encoded `data` is a base64 string through
 * `Schema.Uint8ArrayFromBase64`.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const FilePart: Schema.Struct<{
    readonly type: Schema.tag<"file">;
    readonly mediaType: Schema.String;
    readonly data: Schema.Uint8ArrayFromBase64;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part representing a document source reference used in generating the
 * response.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface DocumentSourcePart extends BasePart<"source", DocumentSourcePartMetadata> {
    /**
     * Type discriminator for document sources.
     */
    readonly sourceType: "document";
    /**
     * Unique identifier for the document.
     */
    readonly id: string;
    /**
     * MIME type of the document.
     */
    readonly mediaType: string;
    /**
     * Display title of the document.
     */
    readonly title: string;
    /**
     * Optional filename of the document.
     */
    readonly fileName?: string;
}
/**
 * Encoded representation of document source parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface DocumentSourcePartEncoded extends BasePartEncoded<"source", DocumentSourcePartMetadata> {
    /**
     * Type discriminator for document sources.
     */
    readonly sourceType: "document";
    /**
     * Unique identifier for the document.
     */
    readonly id: string;
    /**
     * MIME type of the document.
     */
    readonly mediaType: string;
    /**
     * Display title of the document.
     */
    readonly title: string;
    /**
     * Optional filename of the document.
     */
    readonly fileName?: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `DocumentSourcePart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface DocumentSourcePartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of document source parts.
 *
 * **When to use**
 *
 * Use to validate or encode document source references returned as response
 * content parts.
 *
 * **Details**
 *
 * Validates `type: "source"`, `sourceType: "document"`, required `id`,
 * `mediaType`, and `title`, optional `fileName`, and the metadata fields
 * inherited from response parts.
 *
 * @see {@link UrlSourcePart} for URL source references
 * @see {@link DocumentSourcePartEncoded} for the encoded document source representation
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const DocumentSourcePart: Schema.Struct<{
    readonly type: Schema.tag<"source">;
    readonly sourceType: Schema.tag<"document">;
    readonly id: Schema.String;
    readonly mediaType: Schema.String;
    readonly title: Schema.String;
    readonly fileName: Schema.optionalKey<Schema.String>;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part representing a URL source reference used in generating the
 * response.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface UrlSourcePart extends BasePart<"source", UrlSourcePartMetadata> {
    /**
     * Type discriminator for URL sources.
     */
    readonly sourceType: "url";
    /**
     * Unique identifier for the URL.
     */
    readonly id: string;
    /**
     * The URL that was referenced.
     */
    readonly url: URL;
    /**
     * Display title of the URL content.
     */
    readonly title: string;
}
/**
 * Encoded representation of URL source parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface UrlSourcePartEncoded extends BasePartEncoded<"source", UrlSourcePartMetadata> {
    /**
     * Type discriminator for URL sources.
     */
    readonly sourceType: "url";
    /**
     * Unique identifier for the URL.
     */
    readonly id: string;
    /**
     * The URL that was referenced as a string.
     */
    readonly url: string;
    /**
     * Display title of the URL content.
     */
    readonly title: string;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `UrlSourcePart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface UrlSourcePartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of url source parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const UrlSourcePart: Schema.Struct<{
    readonly type: Schema.tag<"source">;
    readonly sourceType: Schema.tag<"url">;
    readonly id: Schema.String;
    readonly url: Schema.URLFromString;
    readonly title: Schema.String;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Alias of {@link AiError.HttpRequestDetails}.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const HttpRequestDetails: Schema.Struct<{
    readonly method: Schema.Literals<readonly ["GET", "POST", "PATCH", "PUT", "DELETE", "HEAD", "OPTIONS", "TRACE", "QUERY"]>;
    readonly url: Schema.String;
    readonly urlParams: Schema.$Array<Schema.Tuple<readonly [Schema.String, Schema.Union<readonly [Schema.String, Schema.Redacted<Schema.String>]>]>>;
    readonly hash: Schema.optional<Schema.String>;
    readonly headers: Schema.$Record<Schema.String, Schema.Union<readonly [Schema.String, Schema.Redacted<Schema.String>]>>;
}>;
/**
 * Alias of {@link AiError.HttpResponseDetails}.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const HttpResponseDetails: Schema.Struct<{
    readonly status: Schema.Int;
    readonly headers: Schema.$Record<Schema.String, Schema.Union<readonly [Schema.String, Schema.Redacted<Schema.String>]>>;
}>;
/**
 * Response part containing metadata about the large language model response.
 *
 * **Example** (Creating a metadata part)
 *
 * ```ts import.meta.vitest
 * import { DateTime } from "effect"
 * import { Response } from "effect/ai"
 *
 * const metadataPart: Response.ResponseMetadataPart = Response.makePart(
 *   "response-metadata",
 *   {
 *     id: "resp_123",
 *     modelId: "gpt-4",
 *     timestamp: DateTime.makeUnsafe("2024-01-01T00:00:00Z"),
 *     request: undefined
 *   }
 * )
 * const result = [metadataPart.id, metadataPart.modelId] // => ["resp_123", "gpt-4"]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ResponseMetadataPart extends BasePart<"response-metadata", ResponseMetadataPartMetadata> {
    /**
     * Optional unique identifier for this specific response.
     */
    readonly id?: string | undefined;
    /**
     * Optional identifier of the AI model that generated the response.
     */
    readonly modelId?: string | undefined;
    /**
     * Optional timestamp when the response was generated.
     */
    readonly timestamp?: DateTime.Utc | undefined;
    /**
     * Optional HTTP request details for the request made to the AI provider.
     */
    readonly request?: typeof HttpRequestDetails.Type | undefined;
}
/**
 * Encoded representation of response metadata parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ResponseMetadataPartEncoded extends BasePartEncoded<"response-metadata", ResponseMetadataPartMetadata> {
    /**
     * Optional unique identifier for this specific response.
     */
    readonly id?: string | undefined;
    /**
     * Optional identifier of the AI model that generated the response.
     */
    readonly modelId?: string | undefined;
    /**
     * Optional timestamp when the response was generated.
     */
    readonly timestamp?: string | undefined;
    /**
     * Optional HTTP request details for the request made to the AI provider.
     */
    readonly request?: typeof HttpRequestDetails.Encoded | undefined;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ResponseMetadataPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ResponseMetadataPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of response metadata parts.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ResponseMetadataPart: Schema.Struct<{
    readonly type: Schema.tag<"response-metadata">;
    readonly id: Schema.optional<Schema.String>;
    readonly modelId: Schema.optional<Schema.String>;
    readonly timestamp: Schema.optional<Schema.DateTimeUtcFromString>;
    readonly request: Schema.optional<typeof HttpRequestDetails>;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Represents the reason why a model finished generation of a response.
 *
 * **Details**
 *
 * Possible finish reasons:
 * - `"stop"`: The model generated a stop sequence.
 * - `"length"`: The model exceeded its token budget.
 * - `"content-filter"`: The model generated content which violated a content filter.
 * - `"tool-calls"`: The model triggered a tool call.
 * - `"error"`: The model encountered an error.
 * - `"pause"`: The model requested to pause execution.
 * - `"other"`: The model stopped for a reason not supported by this protocol.
 * - `"unknown"`: The model did not specify a finish reason.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export declare const FinishReason: Schema.Literals<[
    "stop",
    "length",
    "content-filter",
    "tool-calls",
    "error",
    "pause",
    "other",
    "unknown"
]>;
/**
 * Type of the reason why a model stopped generating a response.
 *
 * **Details**
 *
 * Values include normal stops, token-limit stops, content filtering,
 * tool-call pauses, provider errors, and unknown provider-specific finish
 * reasons.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export type FinishReason = typeof FinishReason.Type;
declare const Usage_base: Schema.Class<Usage, Schema.Struct<{
    /**
     * Information about input (i.e. prompt) token utilization.
     */
    readonly inputTokens: Schema.Struct<{
        /**
         * The number of non-cached input (i.e. prompt) tokens used.
         */
        readonly uncached: Schema.optional<Schema.Int>;
        /**
         * The total of number of input (i.e. prompt) tokens used.
         */
        readonly total: Schema.optional<Schema.Int>;
        /**
         * The number of cached input (i.e. prompt) tokens read.
         */
        readonly cacheRead: Schema.optional<Schema.Int>;
        /**
         * The number of cached input (i.e. prompt) tokens written.
         */
        readonly cacheWrite: Schema.optional<Schema.Int>;
    }>;
    /**
     * Information about the output (i.e. response) tokens used.
     */
    readonly outputTokens: Schema.Struct<{
        /**
         * The total of number of output (i.e. response) tokens used.
         */
        readonly total: Schema.optional<Schema.Int>;
        /**
         * The number of text tokens used.
         */
        readonly text: Schema.optional<Schema.Int>;
        /**
         * The number of reasoning tokens used.
         */
        readonly reasoning: Schema.optional<Schema.Int>;
    }>;
}>, {}>;
/**
 * Represents usage information for a request to a large language model provider.
 *
 * **Details**
 *
 * If the model provider returns additional usage information than what is
 * specified here, you can generally find that information under the provider
 * metadata of the finish part of the response.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export declare class Usage extends Usage_base {
}
/**
 * Response part indicating the completion of a response generation.
 *
 * **Example** (Creating a finish part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const finishPart: Response.FinishPart = Response.makePart("finish", {
 *   reason: "stop",
 *   usage: new Response.Usage({
 *     inputTokens: {
 *       uncached: undefined,
 *       total: 50,
 *       cacheRead: undefined,
 *       cacheWrite: undefined
 *     },
 *     outputTokens: {
 *       total: 25,
 *       text: undefined,
 *       reasoning: undefined
 *     }
 *   }),
 *   response: undefined
 * })
 * const result = [finishPart.reason, finishPart.usage.inputTokens.total] // => ["stop", 50]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface FinishPart extends BasePart<"finish", FinishPartMetadata> {
    /**
     * The reason why the model finished generating the response.
     */
    readonly reason: FinishReason;
    /**
     * Token usage statistics for the request.
     */
    readonly usage: Usage;
    /**
     * Optional HTTP response details from the AI provider.
     */
    readonly response?: typeof HttpResponseDetails.Type | undefined;
}
/**
 * Encoded representation of finish parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface FinishPartEncoded extends BasePartEncoded<"finish", FinishPartMetadata> {
    /**
     * The reason why the model finished generating the response.
     */
    readonly reason: typeof FinishReason.Encoded;
    /**
     * Token usage statistics for the request.
     */
    readonly usage: typeof Usage.Encoded;
    /**
     * Optional HTTP response details from the AI provider.
     */
    readonly response?: typeof HttpResponseDetails.Encoded | undefined;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `FinishPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface FinishPartMetadata extends ProviderMetadata {
}
/**
 * Schema for finish response parts.
 *
 * **Details**
 *
 * Validates `type: "finish"`, `reason` through `FinishReason`, `usage`
 * through `Usage`, and optional provider HTTP response details.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const FinishPart: Schema.Struct<{
    readonly type: Schema.tag<"finish">;
    readonly reason: Schema.Literals<[
        "stop",
        "length",
        "content-filter",
        "tool-calls",
        "error",
        "pause",
        "other",
        "unknown"
    ]>;
    readonly usage: typeof Usage;
    readonly response: Schema.optional<typeof HttpResponseDetails>;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
/**
 * Response part indicating that an error occurred generating the response.
 *
 * **Example** (Creating an error part)
 *
 * ```ts import.meta.vitest
 * import { Response } from "effect/ai"
 *
 * const errorPart: Response.ErrorPart = Response.makePart("error", {
 *   error: new Error("boom")
 * })
 * const result = [errorPart.type, errorPart.error instanceof Error] // => ["error", true]
 * ```
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ErrorPart extends BasePart<"error", ErrorPartMetadata> {
    readonly error: unknown;
}
/**
 * Encoded representation of error parts for serialization.
 *
 * @stability unstable
 * @category models
 * @since 4.0.0
 */
export interface ErrorPartEncoded extends BasePartEncoded<"error", ErrorPartMetadata> {
    readonly error: unknown;
}
/**
 * Represents provider-specific metadata that can be associated with a
 * `ErrorPart` through module augmentation.
 *
 * @stability unstable
 * @category configuration
 * @since 4.0.0
 */
export interface ErrorPartMetadata extends ProviderMetadata {
}
/**
 * Schema for validation and encoding of error parts.
 *
 * **Details**
 *
 * Validates and encodes error parts with `type: "error"` and an `error` payload
 * kept as `unknown`.
 *
 * **Gotchas**
 *
 * The decoded `error` value is not guaranteed to be an `Error`; narrow it before
 * reading `Error`-specific fields.
 *
 * @stability unstable
 * @category schemas
 * @since 4.0.0
 */
export declare const ErrorPart: Schema.Struct<{
    readonly type: Schema.tag<"error">;
    readonly error: Schema.Unknown;
    readonly "~effect/ai/Response/Part": Schema.withDecodingDefaultKey<Schema.tag<"~effect/ai/Response/Part">>;
    readonly metadata: Schema.withDecodingDefault<Schema.$Record<Schema.String, Schema.Codec<Schema.Json>>>;
}>;
export {};
//# sourceMappingURL=Response.d.ts.map