/**
 * Is spectral running as a self-contained compiled binary (Bun `--compile`)
 * rather than as a script under `node`?
 *
 * Two signals, either sufficient:
 *   - the Bun global with embedded files (the standalone build embeds data),
 *   - `process.execPath` naming something that is not a JS runtime — i.e. the
 *     `spectral` binary itself is the executable.
 *
 * Used by `spectral update` (only a standalone binary can self-update) and by
 * `spectral desktop` (to decide what to spawn for a detached `serve`).
 */
export declare function isStandaloneBinary(): boolean;
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