fix(identity): remove stale Leaf prefixes

design/log.md

@@ -79,3 +79,10 @@
 - Kept reserved OKF index and log documents in their specification-defined structures.
 - Verified all user stories are done, all acceptance criteria are checked, the repository has no remote, and no push was performed.
 - Final verification passed with `./gradlew clean check jar` and `okflint` validation.
+
+### US-003 sticky-prefix regression fixed
+
+- Reproduced the cleanup failure that occurred when another plugin changed a Leaf-decorated display name.
+- Leaf now removes exact managed-prefix text without discarding surrounding third-party formatting, clears stale prefixes after reload, and normalizes repeated prefixes before applying one leaf.
+- Added regression coverage for wrapped names, duplicate stale prefixes, untracked stale prefixes, unrelated formatting, tab names, and scoreboard cleanup.
+- Verified the fix with `./gradlew clean check jar`.

design/user-stories/us-003-identify-protected-players.md

@@ -19,6 +19,9 @@ As a **server participant**, I want protected players to be visibly identified s
 - [x] Prefixes are suppressed while Leaf is globally disabled and restored for online opted-in players when it is re-enabled.
 - [x] Prefix updates do not overwrite unrelated display-name text where the Spigot API allows the values to coexist.
 - [x] Scoreboard-team and third-party chat-plugin compatibility limitations are documented, and unsupported integrations fail without affecting protection state.
+- [x] Repeated opt-in or reconciliation never produces multiple Leaf prefixes.
+- [x] Opt-out removes every managed Leaf prefix while preserving unrelated name formatting.
+- [x] A stale Leaf prefix left by an earlier plugin instance is normalized instead of duplicated.
 
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