diff --git a/docs/adr/ADR-024-api-layer-architecture.md b/docs/adr/ADR-024-api-layer-architecture.md
index 87792370..b212a37d 100644
--- a/docs/adr/ADR-024-api-layer-architecture.md
+++ b/docs/adr/ADR-024-api-layer-architecture.md
@@ -172,7 +172,7 @@ kubectl set env deployment/awoooi-api USE_NEW_LAYER=false
 | R1 | 絞殺者包裝 (USE_NEW_ENGINE) | ✅ | Phase 16 R1 |
 | R2 | 移除內嵌重複邏輯 | ✅ | `c7b3f8f` (2026-04-01) |
 | R3 | 抽取 Repository 層 | ✅ | Phase 22 (repositories/) |
-| R4 | 瘦身 Router 層 | 🔴 待執行 | - |
+| R4 | 瘦身 Router 層 | ✅ | `4118808` (2026-04-01) |
 
 > Phase R-R2.1 首席架構師正式審查：72/100 條件通過。
 > P0+P1 全部修復。P2 技術債清單見 ADR-046。