/**
 * Language registry for the structural merge engine.
 *
 * Maps file extensions → language identifiers → tree-sitter grammar WASM names.
 * Grammar WASM names correspond to the filenames published by `tree-sitter-wasms`.
 */
export type SupportedLanguage = "typescript" | "tsx" | "javascript" | "jsx" | "python" | "go" | "rust";
export interface LanguageSpec {
    /** Grammar WASM name as published in `tree-sitter-wasms/out/` */
    grammarName: string;
    /** File extensions handled by this language (lowercase, with dot) */
    extensions: string[];
}
export declare const LANGUAGE_SPECS: Record<SupportedLanguage, LanguageSpec>;
/**
 * Detect the language for a given file path.
 * Returns `null` if the file extension is not supported.
 */
export declare function languageForFile(filePath: string): SupportedLanguage | null;
/**
 * Returns `true` if the file can be handled by the structural merge engine.
 *
 * Excludes TypeScript declaration files (`.d.ts`) — they have no implementation
 * to merge. Excludes `.min.js` and other generated bundles via the generated-file
 * detector in the main resolver pipeline.
 */
export declare function isStructuralLanguage(filePath: string): boolean;
/**
 * Return the grammar WASM name for a file, or `null` if not supported.
 */
export declare function grammarNameForFile(filePath: string): string | null;
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