Harness Shrinkage as Models Improve

Prompt scaffolding shrinks each model release; Cat Wu's pruning discipline; Boris Cherny "100 lines of code a year from now" claim; Anthropic deleted >80% of Claude Code's system prompt for Claude 5 models — and Cherny reports the model is slightly *more* intelligent without the prompts (ablation via SIMPLE=1); the user-side form is delegation rather than deletion ("use your judgement"); mechanical verification stays load-bearing