Originally, all the custom snippets are grouped to a single file called snippets.cson in Atom. Thus, it is too difficult to manage and share between multiple computers or workspaces. Now, you can manipulate your snippets on GitHub as Gist and pull to your Atom environment on demand. Let keep snippets up to date for all Atom workspaces as you concerned.
apm install snippets-from-gist
# Use the hot key Ctrl+Alt+x OR # From the Packages menu -> Snippets From Gist -> Pull
New a page and try your snippets. By the way, your can also view your snippets from File -> Snippets
Please refer to this Gist example https://gist.github.com/ssmak/607432b1d66401428a7bcf5be316f705
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.