export type ChatRuntimeId = string;
export type ChatMode = 'ask' | 'plan' | 'agent';
export type ChatHistoryEntry = {
    role: 'user' | 'assistant';
    content: string;
};
export type ChatProcessInvocation = {
    command: string;
    args: string[];
    stdin: string;
};
export type ChatStreamEvent = {
    event: string;
    data: unknown;
};
export type ImageAttachment = {
    mimeType: string;
    base64: string;
};
export type ChatRuntimeAdapter = {
    id: ChatRuntimeId;
    buildSpawnInvocation(input: {
        prompt: string;
        providerSessionId: string;
        model?: string;
        chatMode?: ChatMode;
        images?: ImageAttachment[];
        workspace?: string;
    }): ChatProcessInvocation;
    buildResumeInvocation(input: {
        providerSessionId: string | null;
        history: ChatHistoryEntry[];
        message: string;
        model?: string;
        workspace?: string;
        images?: ImageAttachment[];
    }): ChatProcessInvocation;
    extractHistoryText(rawOutput: string): string;
    normalizeStreamLine(line: string): ChatStreamEvent[];
};
export declare const CHAT_MODE_TOOLS: Record<ChatMode, string>;
export declare function registerChatRuntimeAdapter(adapter: ChatRuntimeAdapter): void;
export declare function getChatRuntimeAdapter(runtime: ChatRuntimeId): ChatRuntimeAdapter;
export declare function listChatRuntimeAdapters(): ChatRuntimeAdapter[];