I Benchmarked 41 AI Agent Harness Patterns in Isolated VMs: How to Cut Tokens by 90% Without Losing Accuracy

💡 Living Benchmark Index (Last Updated: October 31, 2026 | Verified in Isolated Sandbox VMs: 41 Patterns) Across X/Twitter, Hacker News, and engineering blogs from OpenAI, Anthropic, Google, Martin F