import type { CompactLifecycleRead, CompactLifecycleRecord, CompactLifecycleStage } from './compact-lifecycle-types.js';
export type { CompactLifecycleRead, CompactLifecycleRecord, CompactLifecycleStage };
/**
 * Atomically write a compact lifecycle record. Uses a temp file in
 * the same directory plus `renameSync`, so a crash mid-write never
 * leaves a half-written record (atomic on POSIX, near-atomic on
 * Windows — same contract `24h-mode/store.ts` and
 * `session-checkpoint-service.ts` use).
 *
 * Side effects:
 *   - creates `<sessionDir>/` if missing
 *   - clamps `errorSummary` to 160 characters (longer strings are
 *     truncated at the head, not padded)
 *   - removes the temp file on rename failure (best effort)
 *
 * Throws on I/O failure or validation rejection; the caller decides
 * whether to retry / log / surface to the user.
 */
export declare function writeCompactLifecycle(input: {
    readonly projectRoot: string;
    readonly sessionId: string;
    readonly record: CompactLifecycleRecord;
}): void;
/**
 * Read a compact lifecycle record and classify it.
 *
 * Return kinds:
 *   - `missing`  — no record has ever been written for this session
 *   - `valid`    — record parsed and validated; stage is terminal
 *                  (completed/failed), resting (`armed`) OR is active
 *                  but still fresh
 *   - `invalid`  — file exists but is malformed / wrong schema / out
 *                  of range. `reason` is a single-line English message
 *                  (no CLI verbs, no stack traces). The caller MUST
 *                  surface this to a human — we never silently turn
 *                  a corrupted record into `missing`.
 *   - `stalled`  — record is valid and is currently an ACTIVE stage,
 *                  but `updatedAt` is older than `staleAfterMs` (a
 *                  heartbeat that never arrived). Terminal stages
 *                  never go stalled.
 */
export declare function readCompactLifecycle(input: {
    readonly projectRoot: string;
    readonly sessionId: string;
    readonly nowMs: number;
    readonly staleAfterMs: number;
}): CompactLifecycleRead;