/**
 * Shared chat activity (tool / approval / ask / A2A) helpers.
 *
 * Used by the web SPA reducer and the Ink TUI so both surfaces merge
 * `onToolActivity` + approval/ask dock events the same way.
 */
import type { ToolActivityStep } from './types.js';
export type ChatActivityStepKind = ToolActivityStep['kind'] | 'approval' | 'ask';
export interface ChatActivityStep {
    id: string;
    kind: ChatActivityStepKind;
    label: string;
    status: ToolActivityStep['status'];
    startedAt: number;
    finishedAt?: number;
    preview?: string;
    todoItems?: ToolActivityStep['todoItems'];
}
export interface ChatActivity {
    runId: string;
    status: 'running' | 'success' | 'error';
    startedAt: number;
    finishedAt?: number;
    durationMs?: number;
    outputChars?: number;
    error?: string;
    steps: ChatActivityStep[];
}
export declare function createChatActivity(runId: string, startedAt?: number): ChatActivity;
/** Upsert one live tool/skill/agent/status step onto an activity. */
export declare function mergeActivityStep(activity: ChatActivity, step: ChatActivityStep): ChatActivity;
export declare function mergeToolActivityStep(activity: ChatActivity, step: ToolActivityStep): ChatActivity;
export declare function appendApprovalStep(activity: ChatActivity, opts: {
    messageId: string;
    toolName: string;
    inputJson?: string;
    startedAt?: number;
}): ChatActivity;
export declare function resolveApprovalStep(activity: ChatActivity, opts: {
    messageId: string;
    decision: 'allow' | 'deny' | 'timeout' | string;
    finishedAt?: number;
}): ChatActivity;
export declare function appendAskStep(activity: ChatActivity, opts: {
    messageId: string;
    label: string;
    body?: string;
    startedAt?: number;
}): ChatActivity;
export declare function resolveAskStep(activity: ChatActivity, opts: {
    messageId: string;
    finalText?: string;
    finishedAt?: number;
}): ChatActivity;
export declare function finishActivity(activity: ChatActivity, opts: {
    status: 'success' | 'error';
    finishedAt?: number;
    error?: string;
    outputChars?: number;
}): ChatActivity;
export declare function approvalDecisionToStepStatus(decision: string): ChatActivityStep['status'];
/** Live A2A / agent step preferred for "Waiting for subagent" copy. */
export declare function findWaitingAgentStep(activity: ChatActivity): ChatActivityStep | undefined;
export declare function findLiveActivityStep(activity: ChatActivity): ChatActivityStep | undefined;
export declare function formatActivityDuration(ms: number | undefined): string | null;
/** Per-kind tallies for collapsed “Worked · N tools · M skills” titles. */
export interface ChatActivityKindCounts {
    tools: number;
    skills: number;
    agents: number;
    approvals: number;
    asks: number;
    total: number;
}
export declare function countActivityStepKinds(activity: ChatActivity): ChatActivityKindCounts;
/**
 * Compact English/Chinese-style summary fragments after “Worked” /
 * “已完成”, e.g. `["2 tools", "1 skill"]`. Empty when there are no steps.
 * Callers join with ` · ` and append duration separately.
 */
export declare function formatActivityKindSummaryParts(counts: ChatActivityKindCounts, locale?: 'en' | 'zh'): string[];
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