docs(design): define tyrant game stories

design/user-stories/us-002-transfer-and-reset-tyrant.md

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+---
+type: User Story
+title: "US-002: Transfer and reset the Tyrant role"
+description: End a Tyrant's reign cleanly and establish a valid successor after death.
+status: backlog
+---
+
+# US-002: Transfer and reset the Tyrant role
+
+As a **player**, I want defeating the Tyrant to transfer power predictably so that the central conflict always has meaningful consequences.
+
+## Acceptance criteria
+
+- [ ] A player directly credited with killing the Tyrant becomes the new Tyrant.
+- [ ] A Tyrant death without a player killer selects an eligible opted-in player active within the preceding 24 hours at random.
+- [ ] The former Tyrant is excluded from random succession when another eligible candidate exists.
+- [ ] The former Tyrant's level, unlocks, unspent choices, and Tyrant ability cooldowns reset when the reign ends.
+- [ ] Every Assassin, Fixer, Tamer, Vigilante, and Follower assignment is cleared when the Tyrant dies.
+- [ ] A new Vigilante is selected under the normal candidate rules after succession.
+- [ ] The new Tyrant receives exactly one starting unlock choice.
+- [ ] The Tyrant's displayed name is red and the Tyrant has a red glowing outline while the game is running.
+- [ ] Succession cannot assign the same player as both Tyrant and Vigilante.
+
+## Related
+
+- [Tyrant game state machine](../concepts/game-state-machine.md)
+- [Progress and purchase Tyrant unlocks](us-003-progress-and-purchase-unlocks.md)