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/mcp/websearch.test.ts

@@ -1,36 +1,50 @@
 /// <reference types="bun-types" />
 
 import { describe, test, expect, spyOn, beforeEach, afterEach } from "bun:test"
-import { createWebsearchConfig } from "./websearch"
-import * as shared from "../shared"
+import * as logger from "../shared/logger"
 
 let logSpy: ReturnType<typeof spyOn>
+let createWebsearchConfig: (typeof import("./websearch"))["createWebsearchConfig"]
+let originalEnv: Record<"EXA_API_KEY" | "TAVILY_API_KEY", string | undefined>
 
-beforeEach(() => {
-  logSpy = spyOn(shared, "log").mockImplementation(() => {})
+async function importFreshWebsearchModule(): Promise<typeof import("./websearch")> {
+  return import(`./websearch?test=${Date.now()}-${Math.random()}`)
+}
+
+beforeEach(async () => {
+  originalEnv = {
+    EXA_API_KEY: process.env.EXA_API_KEY,
+    TAVILY_API_KEY: process.env.TAVILY_API_KEY,
+  }
+  delete process.env.EXA_API_KEY
+  delete process.env.TAVILY_API_KEY
+  logSpy = spyOn(logger, "log").mockImplementation(() => {})
+  ;({ createWebsearchConfig } = await importFreshWebsearchModule())
 })
 
 afterEach(() => {
   logSpy.mockRestore()
+  for (const [key, value] of Object.entries(originalEnv)) {
+    if (value === undefined) {
+      delete process.env[key]
+      continue
+    }
+
+    process.env[key] = value
+  }
 })
 
 describe("createWebsearchConfig Tavily handling", () => {
   test("returns undefined when Tavily API key is missing", () => {
-    const originalEnv = process.env.TAVILY_API_KEY
     delete process.env.TAVILY_API_KEY
 
     const config = createWebsearchConfig({ provider: "tavily" })
 
     expect(config).toBeUndefined()
     expect(logSpy).toHaveBeenCalledWith("[websearch] Tavily API key not found, skipping websearch MCP")
-
-    if (originalEnv) {
-      process.env.TAVILY_API_KEY = originalEnv
-    }
   })
 
   test("returns valid config when Tavily API key is present", () => {
-    const originalEnv = process.env.TAVILY_API_KEY
     process.env.TAVILY_API_KEY = "test-key"
 
     const config = createWebsearchConfig({ provider: "tavily" })
@@ -38,11 +52,5 @@ describe("createWebsearchConfig Tavily handling", () => {
     expect(config).toBeDefined()
     expect(config?.type).toBe("remote")
     expect(config?.url).toBe("https://mcp.tavily.com/mcp/")
-
-    if (originalEnv) {
-      process.env.TAVILY_API_KEY = originalEnv
-    } else {
-      delete process.env.TAVILY_API_KEY
-    }
   })
 })