/**
 * TreeSitterService, Grammar loading, parsing, and tree caching.
 *
 * Grammar WASM files are embedded in the compiled binary via Bun's
 * `with { type: 'file' }` import assertion (see embedded-wasm.ts).
 * Missing grammars are handled gracefully (returns null, logs warning).
 * Never throws, callers receive null on failure.
 */
import { Language, Tree } from 'web-tree-sitter';
import type { QueryMatch } from 'web-tree-sitter';
export declare class TreeSitterService {
    private parser;
    private initialized;
    private initPromise;
    private languages;
    private treeCache;
    /**
     * Initialize the WASM module. Safe to call multiple times, only runs once.
     * Must be called before parse() will work.
     */
    initialize(): Promise<void>;
    /**
     * Load a language grammar by ID. Grammars are loaded lazily and cached.
     * Returns null if the grammar WASM file is not available.
     */
    loadLanguage(langId: string): Promise<Language | null>;
    /**
     * Parse a file and cache the result.
     * Returns null if WASM is not initialized or grammar is unavailable.
     */
    parse(filePath: string, content: string, langId?: string): Promise<Tree | null>;
    /** Invalidate the cached tree for a file (call after edits). */
    invalidate(filePath: string): void;
    /**
     * Run a tree-sitter Query on a parsed tree.
     * Returns an empty array if the query fails.
     */
    query(tree: Tree, language: Language, queryString: string): QueryMatch[];
    /** Current number of cached trees. */
    get cacheSize(): number;
    /** Loaded language IDs. */
    get loadedLanguages(): string[];
    /**
     * Free all resources held by this service instance.
     */
    dispose(): void;
}
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