atom-ide-uipackage (required to show the effect of the language server responses)
autosave-onchangepackage (optional, to auto-save script files)
Open a folder with
.nani files; the extension should automatically activate providing syntax highlighting, error checking, auto-completion and command docs.
Opening a single file won't active the extension, as Atom is only able to start language server in "project mode".
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.