Run Multiple Cursor Agents at Once: Parallel AI Testing Tasks for Testers (Step by Step)

Three testing jobs, and only one agent working? In this Cursor parallel agents tutorial for testers, I show how to run several agents at once without them overwriting each other's files: the Agents Window, worktrees, /worktree, /apply-worktree, worktrees.json setup, /multitask, isolated subagents and /best-of-n. Plus examples for manual, API, performance and automation testing, a review checklist, limits, troubleshooting and safety. This is Episode 13 of The Cursor-Powered Tester, a Cursor AI for testing series on Automate With SDET. You'll learn: ✅ What parallel agents are ✅ Why shared files are the big risk ✅ Worktrees: isolated Git checkouts ✅ The Agents Window and /worktree ✅ worktrees.json setup ✅ /multitask and isolated subagents ✅ /best-of-n to compare fixes ✅ How to review and merge parallel work Chapters 0:00 Intro: three jobs, one agent 1:14 Episode 12 recap 1:40 What parallel agents are 2:17 The big problem: shared files 2:50 What a worktree is 3:27 3 ways to run agents in parallel 3:57 The Agents Window 4:34 Starting an agent in a worktree 5:06 /worktree in the editor 5:41 worktrees.json setup 6:20 /multitask 6:55 Isolation for subagents 7:32 /best-of-n 8:07 Quick quiz 8:40 Splitting the work well 9:16 Example: manual testing 9:52 Example: API testing 10:27 Example: performance testing 11:05 Example: automation testing 11:37 Reviewing parallel work 12:13 Limits and costs 12:47 Troubleshooting 13:21 Safety 13:48 Best practices 14:15 Cheat sheet 14:48 Recap 15:15 Homework + next: cloud agents Links Agents Window: https://cursor.com/docs/agent/agents-... Worktrees: https://cursor.com/docs/configuration... Subagents: https://cursor.com/docs/subagents Multi-agent coding (help): https://cursor.com/help/ai-features/m... Title note: the planned title was kept; the documentation calls this 'parallel agents' / 'multi-agent coding', and the title already uses 'Multiple Cursor Agents' and 'Parallel'. Features, menus, plans and prices are as described at the time of recording (October 2026) and can change. Screens in this video are illustrations, not exact screenshots. Follow your company's policy before using AI tools on work data, and never paste real customer data into a prompt. Previous episode: Cursor Hooks for Testers (Ep 12) Next episode: Cursor Cloud Agents for testers (Ep 14) Subscribe to The Cursor-Powered Tester on Automate With SDET. Instagram: @automatewithsdet #CursorAI #ParallelAgents #CursorAgents #GitWorktree #AIAgents #MultiAgent #CursorAgent #CursorAITutorial #CursorAIForTesting #CursorForTesters #TheCursorPoweredTester #AIinTesting #QATesting #SoftwareTesting #