/retro is a banger of a skill

YouTube · Watch/Read · (gathered 2026-10-14)

• When an AI agent makes a mistake, the focus should shift from frustration to implementing mechanisms that make that specific error harder for the agent to repeat in the future.
• The “retro skill” (new in v1.3 of Matt’s skills repo) is designed to conduct retrospectives on previous agent sessions, identifying mistakes and inefficiencies in the process.
• Retro converts these identified issues into either automated checks for deterministic verification or additions to steering files (e.g., coding standards.md) to guide code review agents.
• This skill is invaluable for revealing hidden flaws in your codebase that agents might silently tolerate, providing a crucial outlet for continuous improvement and preventing future errors.