Main Module

1import { realpathSync } from "node:fs";
2import { pathToFileURL } from "node:url";
3
4// Node resolves symlinks in the main module's import.meta.url but argv[1] keeps the invoked
5// spelling (a symlinked skills dir, or /tmp vs /private/tmp on macOS), so compare real paths.
6export function isMainModule(importMetaUrl) {
7  if (!process.argv[1]) return false;
8  try {
9    return pathToFileURL(realpathSync(process.argv[1])).href === importMetaUrl;
10  } catch {
11    return false;
12  }
13}