/**
 * Walk up the directory tree from `__dirname` until a directory that contains
 * both `package.json` and `go.mod` is found. This is the `packages/ttsc` root
 * and must be passed to `buildNativeCompiler` so it can locate `cmd/ttsc`.
 *
 * Uses `fs.realpathSync.native` when available to resolve symlinks identically
 * to the Go toolchain's own path resolution.
 *
 * Throws when the root cannot be found (i.e. the package is not in a Go
 * workspace), which would indicate a broken installation.
 */
export declare function packageRootDir(): string;
/**
 * Walk up the directory tree from `from` looking for a `go.mod` file. Stops
 * after `maxDepth` hops so callers can bound the search to a known
 * neighbourhood of the plugin source directory.
 *
 * Returns the absolute path to the first `go.mod` found, or `null` when no
 * `go.mod` exists within the depth limit or filesystem root is reached first.
 */
export declare function findNearestGoMod(from: string, maxDepth: number): string | null;
/**
 * Return `true` when a relative path escapes its base directory — i.e. starts
 * with `..` or is an absolute path. Used by callers that need to guard against
 * path traversal before building output keys or spawning subprocesses.
 */
export declare function isOutsideRelativePath(relative: string): boolean;