New weapon: Dagger

Minecraft has a good variety of weapons, but most melee weapons focus on damage, range, or area attacks. I propose adding Daggers, a common craftable weapon made from the same basic materials as other weapons.

Daggers would have low damage per hit, very high attack speed, extremely short range, and no knockback. Their sustained single-target DPS could exceed a sword's, but their tiny range forces the player into an enemy's attack range. This makes them especially effective against ranged enemies and in PvP, while making them risky against melee enemies. Daggers would use a fast stabbing animation.

They would support (Sharpness, Smite, Bane of Arthropods, or Breach), Looting, Mending and Unbreaking, plus two unique enchantments:

Venom Aspect: The dagger applies Poison on hit. Subsequent hits extend the effect's duration.

Assassination: While invisible, attacks gain bonus damage based on missing armor. The wielder gains +1 damage for every 2 missing armor points, up to +10. Full armor provides no bonus, while fighting without armor provides the maximum bonus.

Assassination gives Invisibility a meaningful offensive use while creating a high-risk assassin playstyle. The dagger remains visible while invisible, and the dagger's extremely short range means being discovered is dangerous.

The goal is not to make Daggers universally stronger than swords, but to create a distinct high-speed, high-risk melee archetype.