Function suggestPathUnderCwd

src/utils/file.ts:228–267

(
  requestedPath: string,
)

 * @returns The corrected path if found under cwd, undefined otherwise
 */
export async function suggestPathUnderCwd(
  requestedPath: string,
): Promise<string | undefined> {
  const cwd = getCwd()
  const cwdParent = dirname(cwd)

  // Resolve symlinks in the requested path's parent directory (e.g., /tmp -> /private/tmp on macOS)
  // so the prefix comparison works correctly against the cwd (which is already realpath-resolved).
  let resolvedPath = requestedPath
  try {
    const resolvedDir = await realpath(dirname(requestedPath))
    resolvedPath = join(resolvedDir, basename(requestedPath))
  } catch {
    // Parent directory doesn't exist, use the original path
  }

  // Only check if the requested path is under cwd's parent but not under cwd itself.
  // When cwdParent is the root directory (e.g., '/'), use it directly as the prefix
  // to avoid a double-separator '//' that would never match.
  const cwdParentPrefix = cwdParent === sep ? sep : cwdParent + sep
  if (
    !resolvedPath.startsWith(cwdParentPrefix) ||
    resolvedPath.startsWith(cwd + sep) ||
    resolvedPath === cwd
  ) {
    return undefined
  }

  // Get the relative path from the parent directory
  const relFromParent = relative(cwdParent, resolvedPath)

  // Check if the same relative path exists under cwd
  const correctedPath = join(cwd, relFromParent)
  try {
    await stat(correctedPath)
    return correctedPath
  } catch {
    return undefined
  }
}

/**
 * Whether to use the compact line-number prefix format (`N\t` instead of