export type IntentLabel = "exploring" | "reviewing-diff" | "tracing-impact" | "debugging" | "onboarding" | "memory-curating" | "unknown";
export interface ToolCall {
    name: string;
    args: Record<string, unknown>;
    ts: number;
}
export declare class HintEngine {
    private history;
    record(name: string, args: Record<string, unknown>): void;
    /**
     * Best-effort intent classification from the recent call sequence.
     * Order of checks matters: more specific patterns win over generic ones.
     */
    classifyIntent(): IntentLabel;
    /**
     * Build a hint block for the tool that just ran. Returns null when there
     * is nothing useful to say — we'd rather be silent than add noise.
     */
    buildHint(currentTool: string, currentArgs: Record<string, unknown>): string | null;
    private suggestNext;
}