import type { SpawnCapability, SpawnRequest, SpawnResult, WorkflowPhase, WorkflowSizingLabel } from '../types/index.js';
import { type DelegationPacket } from './workflow-delegation.js';
import type { SupportedRuntime } from './workflow-executor.js';
export type RuntimeAdapter = {
    id: string;
    runtime: SupportedRuntime | 'generic';
    capability: SpawnCapability;
    execute(request: SpawnRequest, cwd: string): Promise<SpawnResult>;
};
export type SpawnGuardrails = {
    maxConcurrent: number;
    maxPerTask: number;
    maxDelegationDepth: number;
    contextBudgetTokens: number;
};
export type ActiveSession = {
    taskId: string;
    startedAt: number;
    spawnId: string;
};
export declare const STALE_SESSION_TTL_MS = 300000;
export declare function cleanStaleSessions(): void;
export declare function getActiveSessions(): ReadonlyMap<string, ActiveSession>;
export declare function registerAdapter(adapter: RuntimeAdapter): void;
export declare function getAdapter(id: string): RuntimeAdapter | undefined;
export declare function getAdapterForRuntime(runtime: SupportedRuntime | 'generic'): RuntimeAdapter | undefined;
export declare function listAdapters(): RuntimeAdapter[];
export type BuildSpawnRequestInput = {
    taskId: string;
    runId: string;
    phase: WorkflowPhase;
    role: string;
    adapterId: string;
    packet: DelegationPacket;
    guardrails?: Partial<SpawnGuardrails>;
    delegationDepth?: number;
    sizing?: WorkflowSizingLabel;
};
export declare function buildSpawnRequest(input: BuildSpawnRequestInput): SpawnRequest;
export type GuardrailViolation = {
    code: 'max-concurrent' | 'max-per-task' | 'max-depth' | 'unsupported-runtime' | 'no-adapter';
    message: string;
};
export declare function validateGuardrails(request: SpawnRequest, adapter: RuntimeAdapter | undefined): GuardrailViolation | null;
export type SpawnExecutionMode = 'strict' | 'auto';
export type SpawnBridgeResult = {
    request: SpawnRequest;
    result?: SpawnResult;
    violation?: GuardrailViolation;
    fallback?: SpawnFallback;
};
export type SpawnFallback = {
    type: 'request-artifact';
    artifact: SpawnRequest;
    reason: string;
};
export declare function executeSpawn(request: SpawnRequest, cwd: string, mode?: SpawnExecutionMode): Promise<SpawnBridgeResult>;