Head to head
karpathy-skills vs ponytail
karpathy-skills and ponytail solve the same job (Planning & reasoning), so this is a pick-one decision. karpathy-skills is our default here: Cheapest quality win on the entire list. One file, no install, works alongside everything else. 'Surgical Changes' alone stops the drive-by refactors that break a working layout while fixing something unrelated.
Quick read
- Editor's pick: karpathy-skills.
| Field | karpathy-skillsgithub.com Not yet swept | ponytailgithub.com Not yet swept |
|---|---|---|
| What it is | A ~65-line CLAUDE.md built around four LLM coding failure modes Karpathy identified. Adds no tools — it changes how the agent decides: surface assumptions before coding, refuse speculative abstraction, keep diffs scoped, define a verifiable stopping condition. ~203k stars. | A ruleset premised on 'the best code is code you never wrote'. Applies a seven-rung decision ladder forcing the agent to exhaust stdlib, existing project code and dependencies before writing anything new. Repo claims ~54% less code, 20% cheaper, 27% faster. ~104k stars. |
| Category | Planning & reasoning | Planning & reasoning |
| Cost tier | free | free |
| Pricing | Free | Free · MIT |
| Why builders pick it | Cheapest quality win on the entire list. One file, no install, works alongside everything else. 'Surgical Changes' alone stops the drive-by refactors that break a working layout while fixing something unrelated. | Directly relevant to a Lovable project, where the failure mode is Claude re-implementing a component that already exists three folders over. Also ships review, audit and debt-tracking commands. |
| Watch out for | not logged | not logged |
| How to wire it up | curl -o CLAUDE.md .../main/CLAUDE.md | /plugin marketplace add DietrichGebert/ponytail |
| Editor's pick | Yes | No |
Other matchups worth running
Agent endpoint: GET /api/public/compare?slugs=karpathy-skills,ponytail