A 140-Line SKILL.md Dramatically Changes Agent Behavior

Miles Cranmer showed that adding a 'ponytail skill'—like the 140-line Poteto Mode SKILL.md—markedly improves agent output, proving prompt engineering still matters in 2026.

2026-09-05 ~ 2026-09-06 · 4 related posts

• Before/after a 'ponytail skill': prompt engineering still works wonders — MilesCranmer · 2026-09-05
• Before/after: one skill file still changes agent behavior dramatically — audrow · 2026-09-06
• Poteto Mode: a 140-line SKILL.md in Cursor's plugin repo that disciplines agent behavior — MilesCranmer · 2026-09-06
• pstack turns out to be a whole directory of skills and routines — MilesCranmer · 2026-09-06