| cmd/internal/telemetry/counter | |
| cmd/internal/test2json | Package test2json implements conversion of test binary output to JSON. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| io | Package io provides basic interfaces to I/O primitives. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| os/exec | Package exec runs external commands. |
| os/signal | Package signal implements access to incoming signals. |