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Matt Pocock shares a 'prompt of the day' for cleaning up a messy AGENTS.md: remove no-ops, use progressive disclosure, and move instructions to CODING_STANDARDS.md, delegating the work across three increasingly radical subagents into a single PR. He argues AGENTS.md files are the biggest source of token inefficiency in agent workflows.
X post sharing a 'Graph Engineering' prompt to give coding agents before building multi-step workflows, designed to stop agents from self-grading and catching recurring bugs before they multiply costs.
Built an automated QA/eval engine for agent prompts called Baseline that treats prompts like software for regression testing, allowing non-coders to define rubrics and automatically optimize prompts. Currently in limited beta with a 30-day free trial.