/**
 * Extract a best-effort text string from OpenAI/Anthropic "content" fields.
 * Supports:
 * - string
 * - array of parts: [{ type: "text", text: "..." }, ...]
 * - objects with a `text` string field
 */
export declare function extractCompatTextContent(content: unknown): string;
export type OpenAiChatRole = "system" | "developer" | "user" | "assistant" | "tool" | "function";
export interface OpenAiChatMessage {
    role: OpenAiChatRole;
    content?: unknown;
}
/**
 * For OpenAI-compatible requests, we intentionally reduce "messages" to:
 * - all system/developer messages (joined)
 * - the last user message
 *
 * This keeps the server-side room memory coherent (so stateless clients that
 * resend full history do not cause runaway duplication).
 */
export declare function extractOpenAiSystemAndLastUser(messages: unknown): {
    system: string;
    user: string;
} | null;
export type AnthropicRole = "user" | "assistant";
export interface AnthropicMessage {
    role: AnthropicRole;
    content?: unknown;
}
export declare function extractAnthropicSystemAndLastUser(args: {
    system?: unknown;
    messages: unknown;
}): {
    system: string;
    user: string;
} | null;
/**
 * Resolve a stable room key for compatibility endpoints so manual testing can
 * keep conversation memory when the client provides an identifier.
 *
 * We accept a few common fields without requiring any one client:
 * - OpenAI: body.user (string)
 * - OpenAI: body.metadata.conversation_id
 * - Anthropic: body.metadata.user_id
 * - Anthropic: body.metadata.conversation_id
 */
export declare function resolveCompatRoomKey(body: Record<string, unknown>, fallback?: string): string;
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