| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/gohugoio/hugo/docshelper | Package docshelper provides some helpers for the Hugo documentation, and is of limited interest for the general Hugo user. |
| github.com/gohugoio/hugo/helpers | Package helpers implements general utility functions that work with and on content. |
| github.com/gohugoio/hugo/media | Package media contains Media Type (MIME type) related types and functions. |
| github.com/mitchellh/mapstructure | |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |