/**
 * Pre-first-turn resume probe for the Claude Agent SDK driver.
 *
 * A tier-1 native resume only hands its session id to the SDK inside the first
 * real turn, so the `jsonl_lost` outcome ("No conversation found") is invisible
 * until a turn is consumed. The runner shares the container filesystem with the
 * SDK, so a cheap `stat` of the on-disk JSONL transcript is an authoritative,
 * side-effect-free signal of whether the resume will find its history — no
 * probe query, no spurious model turn.
 *
 * @module
 */
/**
 * Outcome of {@link probeResumeTranscript}: whether the SDK transcript for a
 * requested tier-1 resume exists on disk.
 *
 * @category Resume probe
 */
export type ResumeProbeOutcome = "transcript_found" | "jsonl_lost";
/**
 * Resolve the Claude Code config directory — the parent of `projects/` — from
 * an explicit env map, the process environment, or the `~/.claude` default.
 *
 * The runner's probe and the claude-sdk driver share this one resolver, so they
 * agree as long as they see the same `CLAUDE_CONFIG_DIR`. Today they do:
 * `CLAUDE_CONFIG_DIR` is container-scoped and neither side threads a per-session
 * override through `config.env`, so both fall through to `process.env`. If a
 * future change ever set the driver's `config.env.CLAUDE_CONFIG_DIR` to a
 * divergent path, the reactive `resume_failed { jsonl_lost }` turn remains the
 * safety net.
 *
 * @category Resume probe
 */
export declare function resolveClaudeConfigDir(env?: Record<string, string | undefined>): string;
/**
 * Probe whether the SDK JSONL transcript for `sessionId` exists on disk.
 *
 * Non-null locator result → `transcript_found`; null → `jsonl_lost`;
 * `undefined` → outcome unknown (the probe exceeded its budget or errored). The
 * caller leaves the ack field ABSENT on `undefined` so the reactive
 * `resume_failed { jsonl_lost }` turn stays the safety net — a timed-out probe
 * must never masquerade as a genuine `jsonl_lost` and force a needless downgrade.
 *
 * `opts.timeoutMs` overrides {@link RESUME_PROBE_TIMEOUT_MS}; `opts.locate`
 * overrides the transcript locator (used by tests / alternate stores).
 *
 * @category Resume probe
 */
export declare function probeResumeTranscript(sessionId: string, opts?: {
    env?: Record<string, string | undefined>;
    timeoutMs?: number;
    locate?: (configDir: string, sessionId: string) => Promise<string | null>;
}): Promise<ResumeProbeOutcome | undefined>;
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