/**
 * Map a nested Subagent's own activity onto the parent Subagent card.
 *
 * Child tool rows stay off the parent accordion. Thinking may arrive as
 * `step.reflects` (callDepth>0) or as `kind: 'reflect'` (parent-style).
 * Either way the parent card needs a live inner line instead of “Thinking…”.
 */
import type { ToolActivityStep } from './types.js';
export type SubagentLastTool = NonNullable<ToolActivityStep['lastTool']>;
export declare function isChildInnerToolStep(step: Pick<ToolActivityStep, 'kind' | 'label'>): boolean;
export declare function reflectsFromChildStep(step: Pick<ToolActivityStep, 'kind' | 'label' | 'startedAt' | 'reflects'>): ToolActivityStep['reflects'] | undefined;
export declare function lastToolFromChildStep(step: Pick<ToolActivityStep, 'kind' | 'label' | 'status' | 'startedAt' | 'finishedAt'>): SubagentLastTool | undefined;
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