Filippo Valsorda 1/5/2026

go.sum Is Not a Lockfile

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This article explains the common misconception that go.sum is a lockfile in Go projects. It details that go.sum is merely a local cache for the Go Checksum Database, with no role in version resolution. The author emphasizes that go.mod is the correct file to analyze for dependency graphs, as it lists all direct and transitive dependencies since Go 1.17. The piece contrasts Go's approach with other ecosystems' manifest and lockfile systems.

go.sum Is Not a Lockfile

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