/**
 * Can this engine preset actually change files? — pure, framework-free, no imports.
 *
 * Every coding CLI defaults to read-only or ask-first when run non-interactively, and headless
 * mode has no TTY to approve with. `codex exec` shipped without `--sandbox`, so it inherited
 * `sandbox: read-only`: the engine explored the repo, reasoned well, wrote a good explanation, and
 * could not change a byte — not even `git pull`. Nothing failed loudly, which is why the preset
 * editor has to say so as you type.
 *
 * This mirrors `ENGINE_WRITE_FLAGS` in `workers/api/src/lib/coding-engines.ts`, which is the
 * authority for what the platform SHIPS as a default. The duplication is deliberate and small:
 * the worker has no dependency on this package, and a hint that needs a round-trip per keystroke
 * is not a hint. See `docs/coding-engines.md`.
 */
/** The engine's real binary name, skipping `FOO=bar` prefixes and wrappers like `npx`. */
export declare function engineBin(command: string): string;
/** Whether a preset's binary is driven as Claude (persistent stream-json) or run raw. */
export declare function isClaudeEngine(command: string): boolean;
export type EngineInvocationMode = "structured" | "raw";
/** Whether this editable preset will be driven through structured events or plain stdout. */
export declare function engineInvocationMode(command: string): EngineInvocationMode | null;
/**
 * The flag to add when a preset would launch an engine that cannot write — else null.
 *
 * Returns null for an engine it does not recognise (a local model, a custom wrapper): those have
 * no permission concept, and a false warning on every custom preset trains people to ignore the
 * real one.
 */
export declare function missingWriteFlag(command: string): string | null;
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