Projects with "type": "module" in package.json cause GSD scripts to fail
with "require is not defined" because Node.js walks up the directory tree
and inherits the module type.
Fix: Write {"type":"commonjs"} package.json to the install target (.claude/)
during installation. This stops Node from inheriting the project's ESM config.
- Install: writes package.json after VERSION file
- Uninstall: removes package.json only if it matches our marker
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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