/**
 * Interprets `agy`'s *output channels* (as opposed to agyTranscript.ts, which
 * reads its on-disk files). Two Phase 3 paths live here, both aimed at getting a
 * real answer off stdout so the transcript scrape can retire:
 *   1. parseAgyJsonResponse — read `agy --output-format json` cleanly.
 *   2. runAgyUnderPty — coax a TTY-only build into actually printing, via a
 *      pseudo-terminal, without touching any private files (S1b).
 */
/**
 * Best-effort extraction of the model reply from `agy --output-format json`
 * stdout. agy's JSON schema isn't documented yet, so we accept the shapes it is
 * likely to emit and return undefined otherwise (the caller then tries plain
 * stdout, then the transcript). Accepts a single object, JSONL, or a stream of
 * transcript entries.
 */
export declare function parseAgyJsonResponse(stdout: string): string | undefined;
/** POSIX single-quote a token so it is inert inside an `sh -c` command string. */
export declare function shSingleQuote(token: string): string;
/** Remove the `script(1)` banner lines and CRs so we keep only the child output. */
export declare function stripScriptNoise(raw: string): string;
/** Whether the opt-in PTY recovery path is enabled (AGY_MCP_PTY=1). */
export declare function ptyEnabled(env?: NodeJS.ProcessEnv): boolean;
/**
 * Run `agy <args>` under a pseudo-terminal via the `script(1)` utility, so a build
 * that only streams output to a TTY still gives us real stdout — recovering the
 * answer without reading any of agy's private transcript files (Phase 3, S1b).
 *
 * Opt-in (AGY_MCP_PTY=1), POSIX-only, and best-effort: resolves to "" if `script`
 * is missing or yields nothing, so the caller falls through to transcript
 * recovery. The agy path and every arg are POSIX-quoted, preserving the
 * shell-injection safety of the non-PTY path.
 */
export declare function runAgyUnderPty(args: string[], onProgress?: (newOutput: string) => void): Promise<string>;
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