import type { MetricEntry } from "../utils/types.js";
export declare class MetricsCollector {
    private readonly metricsPath;
    private telemetryClient;
    constructor(twiningDir: string);
    /** Set an optional telemetry client to forward sanitized events */
    setTelemetryClient(client: TelemetryClientLike): void;
    /** Record a tool call metric. Fire-and-forget — never throws. */
    record(entry: MetricEntry): Promise<void>;
}
/** Minimal interface for telemetry client to avoid circular imports */
export interface TelemetryClientLike {
    trackToolCalled(toolName: string, durationMs: number, success: boolean): void;
}
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