/**
 * unknown-agent-claims migration (cost-claim-attribution/AC-14): report
 * instances whose sessions.ndjson holds claim events with agent "unknown".
 *
 * Report-only. There is nothing to apply: sessions.ndjson is append-only, so
 * the repair is `aidlc cost sync`, which the description points at. The
 * finding is `safe` tier because a safe migration that never changes anything
 * is exactly a diagnostic — it can neither prompt nor block.
 *
 * Self-clearing (the cost-capture-noise lesson: a suppression guard needs its
 * counterpart verified to exist). An instance stops being reported once its
 * ledger holds an entry for the affected session, so a successful recovery
 * silences it without anyone editing state. An instance whose transcripts are
 * gone would otherwise report forever — that case is named in the description
 * rather than hidden, because silently dropping it is what let $0.00 sit
 * unnoticed for weeks in the first place.
 */
import type { Migration } from '../types.js';
/**
 * Instances holding claim events with an unresolved platform and no ledger
 * coverage for the affected sessions. Read-only half, exported for reuse.
 */
export declare function unknownAgentInstances(projectRoot: string): string[];
export declare const unknownAgentClaims: Migration;
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