fix: permanently resolve agent name duplication yo-yo bug

src/features/claude-code-session-state/state.test.ts

@@ -6,6 +6,8 @@ import {
   updateSessionAgent,
   setMainSession,
   getMainSessionID,
+  registerAgentName,
+  isAgentRegistered,
   _resetForTesting,
 } from "./state"
 
@@ -102,6 +104,17 @@ describe("claude-code-session-state", () => {
     })
   })
 
+  describe("agent registration", () => {
+    test("should register config-key lookup when given a display name", () => {
+      // given
+      registerAgentName("Atlas (Plan Executor)")
+
+      // when / then
+      expect(isAgentRegistered("atlas")).toBe(true)
+      expect(isAgentRegistered("Atlas (Plan Executor)")).toBe(true)
+    })
+  })
+
   describe("prometheus-md-only integration scenario", () => {
     test("should correctly identify Prometheus agent for permission checks", () => {
       // given - Prometheus session

src/features/claude-code-session-state/state.ts

@@ -1,3 +1,5 @@
+import { getAgentConfigKey } from "../../shared/agent-display-names"
+
 export const subagentSessions = new Set<string>()
 export const syncSubagentSessions = new Set<string>()
 
@@ -14,7 +16,13 @@ export function getMainSessionID(): string | undefined {
 const registeredAgentNames = new Set<string>()
 
 export function registerAgentName(name: string): void {
-  registeredAgentNames.add(name.toLowerCase())
+  const normalizedName = name.toLowerCase()
+  registeredAgentNames.add(normalizedName)
+
+  const configKey = getAgentConfigKey(name).toLowerCase()
+  if (configKey !== normalizedName) {
+    registeredAgentNames.add(configKey)
+  }
 }
 
 export function isAgentRegistered(name: string): boolean {