The go.sum file stores dependency checksums to ensure build reproducibility and security, so you must commit it to your repository.
The go.sum file is a checksum database that verifies the integrity of your module dependencies and prevents supply chain attacks. You must commit it to version control so that every developer and CI system builds your project with the exact same dependency versions and content.
go mod tidy
git add go.sum
git commit -m "update dependencies"
The go.sum file is like a digital fingerprint for every library your project uses. It ensures that when you or your team download these libraries, they haven't been tampered with or changed unexpectedly. Committing it guarantees everyone builds the exact same software, just like a recipe card ensures a cake tastes the same every time.