import type { Subscription } from 'rxjs';
import type { ReplSession } from './session.js';
export interface NextAction {
    command: string;
    description: string;
}
/**
 * Check if agent mode is active via --agent flag or AI agent environment detection.
 */
export declare function isAgentMode(flagValue?: boolean): boolean;
/**
 * Emit a single NDJSON event to stdout.
 */
export declare function agentEmit(event: Record<string, unknown>): void;
/**
 * Emit a terminal success envelope.
 */
export declare function agentResult(command: string, result: unknown, nextActions?: NextAction[]): void;
/**
 * Emit a terminal error envelope.
 */
export declare function agentError(command: string, error: string, options?: {
    fix?: string;
    next_actions?: NextAction[];
}): void;
/**
 * Subscribe the session's message stream to the agent NDJSON protocol.
 * Emits ready/raw/log/warn/error/info/debug/result/eval_error events and
 * silently drops prompt and disconnect. Returns the Subscription so callers
 * can tear it down.
 */
export declare function forwardSessionToAgent(session: ReplSession): Subscription;
/**
 * Read NDJSON commands from stdin. Yields parsed JSON objects.
 * Silently skips malformed lines.
 */
export declare function createAgentStdinReader(): AsyncIterable<Record<string, unknown>>;
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