export type GitCheckout = {
    /** Absolute path of the repository root. */
    root: string;
    /**
     * The GitHub repository `origin` points at, as an `owner/name` full name.
     * Undefined when there is no `origin` or it names some other host.
     */
    repository: string | undefined;
    /**
     * The default branch of `origin`, from `refs/remotes/origin/HEAD`. Undefined
     * when that ref was never written — a `--single-branch` clone, or a remote
     * added by hand — in which case the caller leaves the field to the platform
     * default rather than guessing from the local `HEAD`.
     */
    defaultBranch: string | undefined;
};
/**
 * Parse a git remote URL into a GitHub `owner/name`, or undefined when it does
 * not name one.
 */
export declare function parseGitHubRemote(url: string): string | undefined;
/**
 * The repository root at or above `startDir`, or undefined when it is not in
 * one. A worktree or submodule has `.git` as a FILE, so mere existence is the
 * test — not `isDirectory`.
 */
export declare function gitRoot(startDir: string): string | undefined;
/**
 * The repo-relative path of `dir` inside `root`, in posix form (the separator
 * every consumer of `rootDirectory` splits on). Undefined when `dir` IS the
 * root, so the field stays absent rather than carrying a meaningless ".".
 */
export declare function repoRelativeDirectory(root: string, dir: string): string | undefined;
/** Read the git facts for the checkout `startDir` sits in. */
export declare function readGitCheckout(startDir: string): Promise<GitCheckout | undefined>;
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