/**
 * ACE-TUI OpenAI-compatible streaming client.
 *
 * Supports providers routed through OpenAI-compatible chat/completions APIs.
 * - codex: defaults to OpenAI API endpoint/key env vars
 * - others: require provider-specific base URL + API key env vars
 */
export interface OpenAICompatibleChatMessage {
    role: "system" | "user" | "assistant";
    content: string;
}
export interface OpenAICompatibleChatRequest {
    provider: string;
    model: string;
    messages: OpenAICompatibleChatMessage[];
    temperature?: number;
    topP?: number;
}
export interface OpenAICompatibleChatChunk {
    text: string;
    done: boolean;
    promptTokens?: number;
    completionTokens?: number;
}
export interface ProviderRuntimeDiagnosis {
    provider: string;
    ok: boolean;
    missing: string[];
    message: string;
}
export declare class OpenAICompatibleError extends Error {
    statusCode?: number | undefined;
    responseBody?: string | undefined;
    constructor(message: string, statusCode?: number | undefined, responseBody?: string | undefined);
}
export declare class OpenAICompatibleClient {
    private abortControllers;
    private requestCounter;
    chat(request: OpenAICompatibleChatRequest): AsyncGenerator<OpenAICompatibleChatChunk>;
    abort(): void;
    diagnoseProvider(provider: string): ProviderRuntimeDiagnosis;
    private resolveProviderConfig;
    private streamSseData;
}
/**
 * Resolve a GitHub / Copilot token from the environment or `gh` CLI.
 * Checks: GITHUB_TOKEN → GH_TOKEN → `gh auth token` (sync exec).
 */
export declare function resolveGitHubToken(): string | undefined;
export declare function diagnoseProviderRuntimeConfig(providerInput: string): ProviderRuntimeDiagnosis;
export declare function diagnoseChatRuntimeConfig(providerInput: string, modelInput?: string): ProviderRuntimeDiagnosis;
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