/**
 * Shared factory for API-key-paste "login" flows.
 *
 * Several providers (Cerebras, Synthetic, Moonshot, Together, NanoGPT, ZenMux)
 * don't actually implement OAuth — they just ask the user to paste an API key,
 * optionally validate it, and return the trimmed key.
 */
import type { OAuthController } from "./oauth/types.js";
type ChatCompletionsValidation = {
    kind: "chat-completions";
    provider: string;
    baseUrl: string;
    model: string;
};
type AnthropicMessagesValidation = {
    kind: "anthropic-messages";
    provider: string;
    baseUrl: string;
    model: string;
};
type ModelsEndpointValidation = {
    kind: "models-endpoint";
    provider: string;
    modelsUrl: string | (() => string);
    headers?: Record<string, string> | (() => Record<string, string> | undefined);
};
export type ApiKeyLoginConfig = {
    /** Display name used in error messages, e.g. "Cerebras", "NanoGPT". */
    providerLabel: string;
    /** URL opened in browser for the user to grab their key, or omitted to skip onAuth. */
    authUrl?: string;
    /** Instructions shown with the onAuth callback, or omitted to skip onAuth. */
    instructions?: string;
    /** Prompt message shown when asking for the key paste. */
    promptMessage: string;
    /** Placeholder string for the prompt (e.g. "sk-...", "csk-..."). */
    placeholder: string;
    /** Validation strategy, or `null` to skip validation. */
    validation: ChatCompletionsValidation | AnthropicMessagesValidation | ModelsEndpointValidation | null;
    /** Value returned for an empty key; also allows an empty prompt response. */
    emptyKeyFallback?: string;
};
export declare function createApiKeyLogin(config: ApiKeyLoginConfig): (options: OAuthController) => Promise<string>;
export {};