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/slashcommand/opencode-project-command-discovery.test.ts

@@ -2,7 +2,18 @@ import { afterEach, beforeEach, describe, expect, it } from "bun:test"
 import { mkdtempSync, mkdirSync, rmSync, writeFileSync } from "node:fs"
 import { tmpdir } from "node:os"
 import { join } from "node:path"
-import { discoverCommandsSync } from "./command-discovery"
+
+function requireFresh<T>(modulePath: string): T {
+  const resolvedPath = require.resolve(modulePath)
+  if (require.cache?.[resolvedPath]) {
+    delete require.cache[resolvedPath]
+  }
+  return require(modulePath) as T
+}
+
+function discoverCommandsSync(...args: Parameters<typeof import("./command-discovery").discoverCommandsSync>): ReturnType<typeof import("./command-discovery").discoverCommandsSync> {
+  return requireFresh<typeof import("./command-discovery")>("./command-discovery").discoverCommandsSync(...args)
+}
 
 function writeCommand(path: string, description: string, body: string): void {
   mkdirSync(join(path, ".."), { recursive: true })