The Secret Weapon in AI Coding Isn’t GPT-5.5 — It’s the Prompt Harness You’ve Never Heard Of
The biggest leap in AI coding productivity isn’t coming from larger models like GPT-5.5 — it’s from meticulously tuned prompt harnesses that constrain and guide the model inside the IDE. Microsoft’s VS Code team proved that context management, behavioral constraints, and output validation matter far more than raw model size. Developers and tech leaders must shift focus: invest in the harness, not just the engine.