feat(progression): unlock spawn through boss kills

design/log.md

@@ -51,3 +51,9 @@ description: Chronological record of significant Trigger Spawn design decisions.
 - Added persistent `/spawn` bans, unbans, and paginated ban listing for online and resolvable offline players.
 - Banning immediately clears grants, boss progress, and cooldown state; unbanning restores none of them.
 - Banned player state cannot retain natural or granted access.
+
+## 2026-08-08 — Boss progression
+
+- Added player-attributed Warden, Ender Dragon, and Wither kill observation without importing historical accomplishments.
+- Unique kills unlock and improve the configured cooldown tier in any order; duplicate kills do not count.
+- Each credited kill persists UUID-based progress, clears the current cooldown, and displays an on-screen reward plus colored checklist.

design/user-stories/us-001-earn-progressive-spawn-access.md

@@ -2,7 +2,7 @@
 type: User Story
 title: "US-001: Earn progressive spawn access"
 description: Let players unlock spawn teleportation and improve its cooldown by defeating dangerous enemies.
-status: backlog
+status: done
 ---
 
 # US-001: Earn progressive spawn access
@@ -11,17 +11,17 @@ As a **player**, I want to unlock `/spawn` by defeating major enemies so that my
 
 ## Acceptance criteria
 
-- [ ] The plugin observes player-attributed kills of the Warden, Ender Dragon, and Wither.
-- [ ] Only kills observed while the plugin is operating count; historical statistics and advancements are not imported.
-- [ ] The three enemies may be killed in any order.
-- [ ] The first unique qualifying kill unlocks `/spawn` with the configured one-kill cooldown, which defaults to 8 hours.
-- [ ] The second unique qualifying kill applies the configured two-kill cooldown, which defaults to 4 hours.
-- [ ] The third unique qualifying kill applies the configured three-kill cooldown, which defaults to 1 hour.
-- [ ] Repeated kills of an already credited enemy do not improve the player's tier.
-- [ ] Each newly credited kill displays an on-screen message stating that `/spawn` has been unlocked or updated, is immediately available, and has the shown applicable cooldown.
-- [ ] Progress is presented as a checklist in which credited enemies have a green check and uncredited enemies have a red cross.
-- [ ] Each newly credited unique kill immediately clears any active `/spawn` cooldown as a progression reward.
-- [ ] Progress is associated with the player's UUID and survives server and plugin restarts.
+- [x] The plugin observes player-attributed kills of the Warden, Ender Dragon, and Wither.
+- [x] Only kills observed while the plugin is operating count; historical statistics and advancements are not imported.
+- [x] The three enemies may be killed in any order.
+- [x] The first unique qualifying kill unlocks `/spawn` with the configured one-kill cooldown, which defaults to 8 hours.
+- [x] The second unique qualifying kill applies the configured two-kill cooldown, which defaults to 4 hours.
+- [x] The third unique qualifying kill applies the configured three-kill cooldown, which defaults to 1 hour.
+- [x] Repeated kills of an already credited enemy do not improve the player's tier.
+- [x] Each newly credited kill displays an on-screen message stating that `/spawn` has been unlocked or updated, is immediately available, and has the shown applicable cooldown.
+- [x] Progress is presented as a checklist in which credited enemies have a green check and uncredited enemies have a red cross.
+- [x] Each newly credited unique kill immediately clears any active `/spawn` cooldown as a progression reward.
+- [x] Progress is associated with the player's UUID and survives server and plugin restarts.
 
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