| cmd/go/internal/base | Package base defines shared basic pieces of the go command, in particular logging and the Command structure. |
| cmd/internal/telemetry | Package telemetry is a shim package around the golang.org/x/telemetry and golang.org/x/telemetry/counter packages that has code build tagged out for cmd_go_bootstrap so that the bootstrap Go command does not depend on net (which is a dependency of golang.org/x/telemetry/counter on Windows). |
| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| os | Package os provides a platform-independent interface to operating system functionality. |