import type { FafData } from '../core/types.js';
/** Detect the project stack from repo facts and build .faf data. A slot with
 *  no evidence is left empty (`''`) — never a default. */
export declare function detectStack(dir: string): FafData;
/**
 * {@link detectStack}'s data, and `facts`: the repo's fact for every stack
 * slot (by field — `runtime`, `database`), whatever the app-type — `''` when
 * the repo shows none. detectStack marks a slot its detected type leaves out
 * `slotignored`; `faf auto` fills such a slot from `facts` when the file's own
 * type uses it (a `backend` project whose repo reads as a CLI still gets
 * `runtime: Go` from go.mod).
 */
export declare function detectStackWithFacts(dir: string): {
    data: FafData;
    facts: Record<string, string>;
};