test(tools): update MCP, delegate-task, skill, and slashcommand tests

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/tools/delegate-task/sync-task.test.ts

@@ -1,5 +1,12 @@
 const { describe, test, expect, beforeEach, afterEach, mock, spyOn } = require("bun:test")
 
+function clearRequireCache(modulePath: string): void {
+  const resolvedPath = require.resolve(modulePath)
+  if (require.cache?.[resolvedPath]) {
+    delete require.cache[resolvedPath]
+  }
+}
+
 describe("executeSyncTask - cleanup on error paths", () => {
   let removeTaskCalls: string[] = []
   let addTaskCalls: any[] = []
@@ -23,6 +30,8 @@ describe("executeSyncTask - cleanup on error paths", () => {
     deleteCalls = []
     addCalls = []
 
+    clearRequireCache("./sync-task")
+
     //#given - initialize real task toast manager (avoid global module mocks)
     const { initTaskToastManager, _resetTaskToastManagerForTesting } = require("../../features/task-toast-manager/manager")
     _resetTaskToastManagerForTesting()