ai-agentsprompt-engineeringai-engineeringllm-developmentsoftware-architecture Build a Self-Improving Agent Harness in an Afternoon You cannot retrain Claude. You cannot fine-tune GPT. The weights belong to Anthropic and OpenAI, and no amount of clever prompting changes a single parameter. That fact makes a lot of engineers… michael tuszynski Jul 05, 2026 7 min read