I would like shellPrompt to match anywhere in the command, not only from the beginning. E.g. if I have a command called "run_icesocial", I would like that to appear if I type "icesoc", rather than having to type "run_" first. It looks like XMonad.Prompt.Shell.commandCompletionFunction is the function to modify: commandCompletionFunction :: [String] -> String -> [String] commandCompletionFunction cmds str | '/' `elem` str = [] | otherwise = filter (isPrefixOf str) cmds Changing isPrefixOf to isInfixOf I would guess - does that sound right? Is there an easy way to "override" that function from my xmonad.hs? If not, would it be reasonable to make it configurable, so e.g. you could put in a fuzzy matching function, or something even weirder? (I'll give that a go, if so.) Best regards, Adam -- "Sunday morning when the rain begins to fall Adam Sjøgren I've got the cure for it all" asjo@koldfront.dk