| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/hex | Package hex implements hexadecimal encoding and decoding. |
| flag | Package flag implements command-line flag parsing. |
| github.com/stretchr/testify/require | Package require implements the same assertions as the `assert` package but stops test execution when a test fails. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path | Package path implements utility routines for manipulating slash-separated paths. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| testing | Package testing provides support for automated testing of Go packages. |