import type { RunStore } from "./types.ts";
/** What marks a file in the artifacts directory as a run's event log rather than one of its step sessions. */
export declare const RUN_LOG_SUFFIX = ".events.jsonl";
/**
 * Filesystem `RunStore` (spec §8.9): append-only JSONL, one file per run, so runs are independently
 * keyed and listable/resumable across sessions and process restarts.
 *
 * `dir` is the already-resolved run-artifacts directory (project-dir.ts's `runArtifactsDir`), not a
 * project root: WHERE a run's artifacts belong is one decision, made once, by whoever holds the
 * harness context — this file only owns the format.
 *
 * That directory also holds every step SESSION file this run spawns (spec §2.2), which is why the log
 * carries the `.events.jsonl` suffix and why `list()` filters on it: a bare `.jsonl` scan would try to
 * read each step session as a run log. In the other direction nothing needs doing — the log is not a
 * session file and the harness's own reader returns `null` for anything whose first line is not
 * `{"type":"session"}`, with every enumerator dropping nulls. There is no `.meta.json` sidecar any
 * more: `workflowFilePath` is a `run-meta` event in the log itself (engine/types.ts), so a run is
 * exactly one file and `delete` is exactly one unlink.
 */
export declare function createFsStore(dir: string): RunStore;
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