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Can you spot which committed file explains this mismatch?

Google Developers (Google I/O) · Jun 08, 2026 · Engineering Insights

A developer quiz asks which committed file explains npm install vs npm ci version mismatches.

“Yesterday, everything worked. Today, CI and local installs disagree, and nobody touched package.json.”

A Google I/O social-media quiz poses a package-management puzzle where npm install and npm ci produce different dependency versions, hinting that the committed package-lock.json is the answer. It is a developer engagement quiz with no meaningful AI industry signal.

npm package-management developer-quiz

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