| bytes | Package bytes implements functions for the manipulation of byte slices. |
| embed | Package embed provides access to files embedded in the running Go program. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go/format | Package format implements standard formatting of Go source. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| text/template | Package template implements data-driven templates for generating textual output. |