/**
 * Language def for a file extension, or null when no tree-sitter grammar applies (md, or an
 * unsupported extension — the chunker falls back to a file-level chunk).
 * @param {string} ext  lowercased extension including the dot, e.g. ".py"
 * @returns {LangDef | null}
 */
export function langForExt(ext: string): LangDef | null;
/**
 * @typedef {Object} LangDef
 * @property {string} format         format tag (matches indexer FORMAT)
 * @property {string} grammar        vendored wasm filename under ./grammars
 * @property {string[]} defTypes     tree-sitter node types that become symbol chunks
 * @property {string[]} importTypes  tree-sitter node types that carry an import specifier (slice 4)
 * @property {boolean} [requireCalls] also treat `require("…")` call-expressions as imports (CJS)
 * @property {string[]} callTypes    tree-sitter node types that are a call site (impact, slice 5)
 * @property {string[]} branchTypes  node types counted as decision points for cyclomatic-ish complexity (slice 5)
 * @property {string[]} [decoratorTypes]  node types where a bare `@name` applies (= uses) `name` (slice 5)
 */
/** @type {Record<string, LangDef>} */
export const LANGDEFS: Record<string, LangDef>;
export type LangDef = {
    /**
     * format tag (matches indexer FORMAT)
     */
    format: string;
    /**
     * vendored wasm filename under ./grammars
     */
    grammar: string;
    /**
     * tree-sitter node types that become symbol chunks
     */
    defTypes: string[];
    /**
     * tree-sitter node types that carry an import specifier (slice 4)
     */
    importTypes: string[];
    /**
     * also treat `require("…")` call-expressions as imports (CJS)
     */
    requireCalls?: boolean | undefined;
    /**
     * tree-sitter node types that are a call site (impact, slice 5)
     */
    callTypes: string[];
    /**
     * node types counted as decision points for cyclomatic-ish complexity (slice 5)
     */
    branchTypes: string[];
    /**
     * node types where a bare `@name` applies (= uses) `name` (slice 5)
     */
    decoratorTypes?: string[] | undefined;
};