diff --git a/src/utils/legacy-cleanup.ts b/src/utils/legacy-cleanup.ts
index 801f851f..1603a3a7 100644
--- a/src/utils/legacy-cleanup.ts
+++ b/src/utils/legacy-cleanup.ts
@@ -118,6 +118,7 @@ const STALE_AGENT_NAMES = [
   "security-sentinel",
   "spec-flow-analyzer",
   "testing-reviewer",
+  "web-researcher",
 ]
 
 /** Old prompt wrapper names (we no longer generate workflow prompts). */