postinstall.js doesn't run automatically on npm install -g; binary bootstrap fails

[blueman82]

Environment

• OS: macOS (arm64)
• npm version: 11.6.2
• Node version: v24.10.0
• Installation method: npm install -g @just-every/code@latest

Steps to Reproduce

1. Run npm uninstall -g @just-every/code
2. Run npm install -g @just-every/code@latest
3. Run code --version

Expected Behavior

Binary installs successfully and code --version displays the version number.

Actual Behavior

• postinstall.js does not run automatically during install
• Bootstrap logic in coder.js fails to download the binary
• Users get error: /Users/harrison/.bun/bin/code: line 2: /Users/harrison/.bun/bin/coder: No such file or directory
• Wrapper script exists but points to missing binary

Workaround

Manually running node postinstall.js from the codex-cli directory completes installation successfully.

Additional Notes

The coder.js file contains robust bootstrap logic that should handle missing binaries, but it didn't trigger. The error message "Upgrade helper error: hit step limit without completing guided session" was not helpful for debugging.