/**
 * Isolated bounded subagents.
 *
 * First-class subagent runs: isolated context, bounded toolset, bounded budget,
 * bounded lifetime, cancellation propagation, durable start/finish events, and
 * structured output that the parent must validate before use. A subagent
 * cannot expand scope, cannot mutate/commit/publish by default, and cannot
 * recursively spawn children beyond explicit parent policy and depth limits.
 * All child consumption is charged to the parent budget via the ledger.
 */
import type { BudgetLedger } from "./budget-ledger.js";
import type { SubagentRunRecord, SubagentSpec, SubagentStatus } from "./types.js";
export interface SubagentRuntimeConfig {
    maxDepth: number;
    maxTotalChildren: number;
    maxConcurrentChildren: number;
}
export declare const DEFAULT_SUBAGENT_CONFIG: SubagentRuntimeConfig;
export interface SubagentLaunchInput {
    spec: SubagentSpec;
    parentCanMutate: boolean;
    parentCanPublish: boolean;
    siblingCount: number;
    activeChildren: number;
    parentLedger: BudgetLedger;
    config?: SubagentRuntimeConfig;
}
export interface LaunchDecision {
    allowed: boolean;
    reasonCodes: string[];
    record: SubagentRunRecord | null;
}
/**
 * Deterministically decide whether a subagent may launch under parent policy
 * and runtime limits (depth, total children, concurrency, budget, mutation).
 */
export declare function canLaunchSubagent(input: SubagentLaunchInput): LaunchDecision;
/** Advance a subagent record status (durable event), frozen snapshot. */
export declare function transitionSubagent(record: SubagentRunRecord, status: SubagentStatus, at?: string): SubagentRunRecord;
/** Charge a child's consumption to the parent budget (append-only, idempotent). */
export declare function chargeChildToParent(ledger: BudgetLedger, childId: string, resource: string, amount: number, runId: string): BudgetLedger;
/** Deterministic ordering key for parallel read-only subagent results. */
export declare function parallelOrderKey(records: readonly SubagentRunRecord[]): string[];
export type { SubagentRunRecord, SubagentStatus };
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