One SKILL.md that runs across Claude, ChatGPT, Cursor and Grok Bot
The post claims a single SKILL.md works in Claude, ChatGPT, Cursor and Grok Bot, listing five skill repos such as caveman and superpowers.

Anthropic just made your prompts obsolete one SKILL.md now runs in Claude, ChatGPT, Cursor and Grok Bot these 5 skills make your agent feel unfair: → caveman (114K★) - cuts token bloat without losing the fix http://github.com/JuliusBrussee/caveman → superpowers (300K★) - plan first, test first, prove it works http://github.com/obra/superpowers → supply-chain-risk-auditor - flags risky dependencies before they enter your build http://github.com/trailofbits/skills → agentic-actions-auditor - finds PR-to-agent prompt injection paths in your CI http://github.com/trailofbits/skills → skill-creator (180K★) - builds, tests and tunes skills that actually trigger http://github.com/anthropics/skills stop collecting prompts. start building skills the poster shows how to write your own SKILL.md install the skills tonight. then see how an xAI engineer scales to 200+ agents in the article below ↓
This post quotes another post: x.com/choopyplug1/status/2109281728179093944