import type { ExtensionFactory } from "@earendil-works/pi-coding-agent";
export declare const TOOL_TIMING_ENTRY_TYPE = "pi-workflows:tool-timing";
export interface ToolTimingEntry {
    readonly toolCallId: string;
    readonly toolName: string;
    readonly startedAt: number;
    readonly completedAt: number;
    readonly durationMs: number;
    readonly isError: boolean;
}
export declare const TOOL_TIMING_EXTENSION: ExtensionFactory;
export declare function createToolTimingExtension(clock?: () => number): ExtensionFactory;