I have tried to find a knifebot plugin which detect for autostab or autoslash (CS 1.6).
Sadly I cannot find any plugins which does that or people write that it's not possible.
Now my suggestion is...
When a new player enters gameserver, we will check on round 3 spawn for knifebot.
This means that we will freeze player and then spawn an invisible bot infront of him. If the player hits the bot 1 or 2 times without touching MOUSE1 or MOUSE2 (because we froze him) - it's equal knifebot hack
Now... Is it possible?