$ lz5
  -bash: lz5: command not found
  $ brew install lz5
  ==> Auto-updated Homebrew!
  Updated Homebrew from b5a6b4e to 7926114.
  Error: No available formula with the name "lz5" 
  ==> Searching for similarly named formulae...
  Error: No similarly named formulae found.
  ==> Searching taps...
  Error: No formulae found in taps.

So, rather than complain about this, how do I do something to fix it? Can I add lz5 as a tap to Homebrew?

EDIT: Let me try this again, in a more productive way.

lz5 does not currently exist in Homebrew. I'd like to fix this. I've never done this before. Does anyone have advice? Is it as simple as forking lz5, then adding a tap to Homebrew?

Thanks. And as a note, this edit occurred after specialp's replies. They were right: this originally wasn't a productive comment.