| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/alecthomas/colour | Package colour ([docs][1]) provides [Quake-style colour formatting][2] for Unix terminals. |
| github.com/alecthomas/kong | Package kong aims to support arbitrarily complex command-line structures with as little developer effort as possible. |
| github.com/chzyer/readline | Readline is a pure go implementation for GNU-Readline kind library. |
| github.com/gliderlabs/ssh | Package ssh wraps the crypto/ssh package with a higher-level API for building SSH servers. |
| github.com/google/shlex | Package shlex implements a simple lexer which splits input in to tokens using shell-style rules for quoting and commenting. |
| github.com/kr/pty | Package pty is a wrapper for github.com/creack/pty, which provides functions for working with Unix terminals. |
| golang.org/x/crypto/ssh/terminal | Package terminal provides support functions for dealing with terminals, as commonly found on UNIX systems. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |