Anti-KB functions by modifying how the game client processes "velocity" packets sent from the server.
Since you asked to "provide a feature," the single most important feature is: anti kb mod 1.8.9
Advanced versions allow you to adjust "Horizontal" (how far back you go) and "Vertical" (how high you fly) separately. Anti-KB functions by modifying how the game client
“Nice hacks, kid,” iPyro_Flash typed in the death chat before disconnecting. anti kb mod 1.8.9
Never download a .jar or .exe file claiming to be a lightweight Anti KB mod from a Discord DM or unverified YouTube description. Stick to known developers (though this doesn't make cheating ethical).