export interface LocalEnvironment {
    osType?: string;
    outputDirectory: string;
    tempDirectory: string;
    apiKeys?: Record<string, string>;
}
export interface ToolPreference {
    toolName: string;
    customOptions?: Record<string, any>;
}
export declare class ExecutionContext {
    environment: LocalEnvironment;
    toolPreferences: Map<string, ToolPreference>;
    private static instance;
    private runtime;
    constructor();
    static getInstance(): ExecutionContext;
    private initEnvironmentSync;
    private ensureDirectories;
    setEnvironment(env: Partial<LocalEnvironment>): void;
    addToolPreference(toolName: string, options?: Record<string, any>): void;
    getToolPreference(toolName: string): ToolPreference | undefined;
    toJSON(): {
        environment: LocalEnvironment;
        toolPreferences: {
            [k: string]: ToolPreference;
        };
    };
}