import { type AgentMessage, type AgentRunArgs, type AgentRunner } from './agent-runner.js';
/** Linux rejects a single argv element of 128 KiB or more (MAX_ARG_STRLEN)
 *  with E2BIG; stay under it with room for the `--query=` prefix. */
export declare const HERMES_MAX_QUERY_ARG_BYTES: number;
/** How this hermes takes a headless prompt — see file header. */
export type HermesQueryMode = 'query-file' | 'query-arg';
/** The `hermes chat` argv for one turn. */
export declare function hermesChatArgs(mode: HermesQueryMode, prompt: {
    file: string;
    text: string;
}, model?: string): string[];
/** Pick the query mode from `hermes chat --help` output. */
export declare function hermesQueryMode(chatHelp: string): HermesQueryMode;
export declare class HermesAgentRunner implements AgentRunner {
    private hermesBin?;
    private opts;
    /** Set only from a clean `--help` probe; a failed one is retried next run. */
    private queryMode;
    constructor(hermesBin?: string | undefined, opts?: {
        helpProbeTimeoutMs?: number;
    });
    /** Pick the query mode from `hermes chat --help`, cached per runner once a
     *  probe succeeds. A timed-out, failed or empty probe falls back to
     *  `--query=` for this run only (0.19.0's form) and is not cached. */
    private detectQueryMode;
    run(args: AgentRunArgs): AsyncIterable<AgentMessage>;
    /**
     * Run one headless `hermes chat` invocation. Yields exactly one liveness
     * `tool_use` message the instant the subprocess spawns (see file header —
     * hermes has no intermediate event stream to yield from, unlike codex),
     * then drains stdout to completion. End-of-turn facts (exit code, stderr
     * tail, warning-filtered stdout text, session id parsed from stderr) are
     * written into `outcome`, which the caller reads after this generator
     * completes.
     */
    private streamTurn;
}
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