`go mod tidy` Is the Command You Should Run When Go Dependencies and Imports Have Stopped Agreeing With Each Other
A practical guide to `go mod tidy` for cleaning up Go module metadata so `go.mod` and `go.sum` match the imports the project actually uses.
Why this command matters: Go projects are happiest when the dependency graph on disk matches the imports in code instead of several historical accidents layered together.
If a Go project has stale module entries, missing sums, or dependency noise after refactors, go mod tidy is the cleanup command that usually belongs in the conversation.
The command
go mod tidyThis updates go.mod and go.sum so they better reflect what the module actually imports and requires.
That helps when:
- old dependencies linger after code removal
- new imports have not been fully recorded
- CI complains about module metadata drift
- a branch touched dependencies and now the project state looks inconsistent
Final recommendation
When Go dependency metadata and real imports feel out of sync, run go mod tidy. It is still one of the cleanest ways to make the module files tell the same story as the code.