feat(combat): opt out attacking players

design/log.md

@@ -42,3 +42,10 @@
 - Name cleanup restores only values Leaf installed; third-party changes are preserved.
 - Documented scoreboard, custom chat, tab-list, and per-viewer scoreboard limitations.
 - US-003 remains in progress until combat and global administration paths are verified.
+
+### US-002 combat opt-out completed
+
+- Added modern Spigot damage-source attribution for direct attacks, projectiles, thrown potions, area clouds, tamed animals, TNT, Thorns, and other reliably attributed sources.
+- Ambiguous, cancelled, zero-damage, environmental, and self damage do not opt out a player.
+- Combat opt-out bypasses administrative locks, immediately reconciles effect and prefix state, persists once, and sends one explanatory message.
+- Verified attribution, victim safety, lock bypass, duplicate suppression, and the full build with `./gradlew clean check jar`.