/**
 * Reading facts back out of a Codex rollout transcript.
 *
 * The headless `--json` stream carries neither the context total nor the
 * account's rate limits, but codex writes both into every `token_count` event of
 * the rollout it is already keeping on disk. That file is the only structured
 * source we have for either, so this module is the one place that knows how to
 * find a thread's rollout and walk it.
 */
import type { EngineResult } from "../shared/types.js";
export declare const CODEX_SESSIONS_DIR: string;
export declare function forEachCodexTokenCount(sessionId: string, root: string, visit: (payload: any) => void): void;
/** When codex last said its rate-limit window reopens, in Unix seconds. */
export declare function lastCodexTranscriptResetsAt(sessionId: string, root?: string): number | undefined;
/**
 * The rate-limit reading for a failed turn, or nothing at all.
 *
 * Codex states its reset in the `rate_limits` snapshot it writes to the rollout
 * for every `token_count`; the error prose is the fallback for a turn that died
 * before one landed. When neither source names a time, `resetsAt` is left absent
 * so the retry machinery uses its own backoff — a made-up reset would be worse
 * than no reset, because it would be believed.
 */
export declare function codexRateLimitFor(error: string | undefined, threadId: string, sessionsDir: string): Pick<EngineResult, "rateLimit">;
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