--- type: User Story title: "US-001: Track creeper defeats" description: Record persistent player progress from creeper kills attributable to the player. status: backlog --- # US-001: Track creeper defeats As a **player**, I want my qualifying creeper kills recorded so that my Creeper Aura progression persists. ## Acceptance criteria - [ ] A creeper kill attributable to a player adds one kill to that player's lifetime progress. - [ ] Direct melee kills and indirect kills attributable to the player, including projectiles and the player's tamed wolves, count. - [ ] A single creeper death cannot award progress more than once. - [ ] Progress is stored using the player's UUID rather than their mutable name. - [ ] Progress survives logout, server restarts, and player-name changes. - [ ] Progress updates are persisted without blocking the Minecraft server thread on slow storage work. - [ ] Missing or invalid persisted data is handled safely and reported to server administrators. ## Related - [Creeper Aura ranks](us-002-unlock-creeper-aura-ranks.md) - [User-story catalog](index.md)