How Go packages map to folders, how exported names work, and how the internal directory restricts imports.

• Packages And Imports
• Exported And Unexported Names
• The internal Directory

How to structure a Go project as it grows, from a single main.go to internal packages and cmd folders for multiple binaries.

• Structuring A Go Project
• The cmd Directory And Multiple Binaries

Understand go.mod and go.sum, add and tidy dependencies, work with versions and major version paths, and use replace.

• go.mod And go.sum
• Adding And Tidying Dependencies
• Versions And Upgrades
• The replace Directive

Develop several local modules together with go.work workspaces and fetch private modules with GOPRIVATE and git credentials.

• Go Workspaces With go.work
• Private Modules And GOPRIVATE