21.6The Bottom Line

For your interview, the recommended stack as of July 2026 is:

Primary: Playwright CLI + skill for all agent-driven test execution, Test Agents (planner/generator/healer) for the workflow Secondary: Playwright MCP where sandboxing demands it; Stagehand or browser-use for UI that defeats structural approaches Framework: Markdown plans in specs/ + generated tests + GitHub Actions CI + archived traces

This gives you:

• Cost efficiency for daily CI runs (~4x vs MCP, vendor-benchmarked)
• A reviewed, human-readable source of truth (plans, not selectors)
• Self-healing with honesty (healer can rule "app is broken")
• An audit trail (traces with network capture)
• Portability — plans and skills outlive any single tool