/**
 * Canonical language id by file extension — engine-homed for rule gating.
 *
 * The near-clone rule must gate candidate pairs to the same language. The
 * equivalent filter in graph-adapter-common cannot be imported from the engine
 * rule layer (adapter-common depends on the engine). This module is the
 * canonical extension map consumed by rules; adapter-common may delegate here
 * in a follow-up.
 */
/**
 * Return the canonical language id for `filePath` by extension, or `undefined`
 * when the extension is not recognized.
 */
export declare function languageOfFile(filePath: string): string | undefined;
//# sourceMappingURL=language-of-file.d.ts.map