HackWatch

HackWatch — Client-Side Cheat Detector for Fabric 1.21.1
Tired of losing fights and not knowing if the other person is cheating? HackWatch runs quietly in the background and watches other players for signs of cheating — warning you privately so you can make up your own mind, without ever accusing anyone publicly.

What it detects

Reach — hits landing from further than normal Minecraft allows
KillAura — hits landing while not even looking at you, instant aim snaps, rapid target-switching
Fake crits — critical hits while the attacker never left the ground
Anti-knockback — barely moving when you land a hit on them
Auto-totem — slotting a new totem instantly after one pops, faster than any human could

How it works
The moment something suspicious happens you get a clean, simple warning on your screen — “PlayerName cheater KillAura” or “PlayerName suspected Reach”. No walls of technical text, no public chat spam, no accusations. Just a quiet heads-up so you know to pay attention.
Press J to open the session log — every flagged player, with a timestamped timeline of exactly what was detected and what was measured. Press Right Shift to open settings and turn individual checks on or off.

What makes it different
Most client-side anticheat mods guess who hit you based on whoever is standing closest. HackWatch uses the server’s own damage packet, which names the exact attacker — so detections are accurate even in crowded free-for-all zones with a dozen players fighting at once.
It is also completely passive — it gives you no combat advantage whatsoever, and never sends anything to the server. It’s purely a private awareness tool for you.

Who is it for

Players who want to know if they’re being cheated against in PvP
Server owners who want a second opinion on suspicious players before acting
Streamers and recorders — an anonymous mode scrambles names on screen so viewers can’t harass anyone before you’ve reviewed the evidence yourself