import type { Backend, BackendRunOptions } from "./types.js";
/**
 * EXPERIMENTAL Antigravity CLI (`agy`) backend — opt in with GEMINI_MCP_BACKEND=agy.
 *
 * agy is gemini-cli's successor (Gemini CLI retires 2026-06-18 for free/Pro/Ultra
 * tiers). The migration analysis behind this lives in
 * docs/migration/antigravity-cli.md. The behaviours that shape this code:
 *  1. `agy -p` is broken in 1.0.x — exit 0, empty stdout (and sometimes a
 *     non-zero exit). Phase 3 makes output recovery a self-retiring ladder
 *     (best → last-resort): clean JSON stdout when the build advertises
 *     `--output-format json`; else plain stdout; else an opt-in pseudo-terminal
 *     run (AGY_MCP_PTY=1) that coaxes a TTY-only build into printing; else the
 *     on-disk transcript (agyTranscript.ts). A failed print run descends the
 *     ladder rather than aborting. As agy improves, capability probing shifts
 *     us up the ladder with no code change.
 *  2. Print-mode is hardcoded to Gemini 3.5 Flash; `--model` is ignored and
 *     hangs if forced. supportsModelSelection is false; we never pass --model.
 *  3. `@file` is not inlined by agy (it's agent-first). We inline files ourselves
 *     so the project-root guard and determinism survive — and because inlined
 *     prompts carry whole files, they ride on stdin to dodge OS argv limits.
 *  4. `--sandbox`/`--dangerously-skip-permissions` do NOT isolate tool execution
 *     in -p. We surface that truthfully instead of implying isolation.
 */
/** Build the prompt agy actually receives: changeMode wrap + self-inlined files. */
export declare function buildAgyPrompt(prompt: string, opts: BackendRunOptions): string;
export declare function buildAgyArgs(opts: BackendRunOptions): string[];
/** Track agy's --print-timeout (default 5m) to our cap. Override: AGY_PRINT_TIMEOUT. */
export declare function agyPrintTimeoutArg(): string;
export declare const agyBackend: Backend;
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