/** Env var marking this process as a pi-subagents child lane (set by the pool). */
export declare const RUN_ID_ENV = "PI_SUBAGENTS_RUN_ID";
/** Env var carrying the escalation dir (parent's steer dir). */
export declare const ESCALATION_DIR_ENV = "PI_SUBAGENTS_ESCALATION_DIR";
/**
 * Exit code signaling an escalation to the parent runner (ryan benchmark
 * §2.3). Mirrors src/lanes/escalation.ts — duplicated on purpose so the child
 * adapter keeps zero src/ imports.
 */
export declare const ESCALATION_EXIT_CODE = 42;
/** Payload written to a `<runId>.escalation.json` file. */
export interface EscalationFilePayload {
    runId: string;
    message: string;
    timestamp: number;
}
/** Resolve the escalation file path for a run id. */
export declare function escalationFilePath(runId: string, dir: string): string;
/**
 * True when the current session is a pi-subagents subagent session (the env
 * marker is only ever injected by the parent LanePool at spawn time, so a
 * main/master session never qualifies — no self-escalation from the master).
 */
export declare function isSubagentSession(env?: NodeJS.ProcessEnv): boolean;
/** sha-256 hex of the escalation message (hash-only trace posture). */
export declare function escalationMessageHash(message: string): string;
/**
 * Atomically write the escalation record for `runId` into `dir` (temp file +
 * rename, so the parent's consume-once read never observes a partial write).
 * Creates the dir if missing. Returns the absolute escalation file path.
 */
export declare function writeEscalationFile(runId: string, message: string, dir: string): string;