ultrathink
Elevates thinking for complex problems with intellectual honesty. Activates deep analysis while avoiding performative contrarianism. Use when facing decisions that deserve more than the first answer, require trade-off evaluation, or benefit from rigorous self-checking before responding.
Profile →npx skills add majiayu000/claude-skill-registry --skill ultrathink --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Ultrathink *Slow down. Think clearly. Be useful.* <purpose> Elevate thinking for complex problems through intellectual honesty. Deep analysis without performative contrarianism. </purpose> <when_to_activate> Activate when: - The problem deserves more than the first answer that comes to mind - Multiple valid approaches exist and trade-offs matter - You're about to give advice that will affect real decisions - Requirements are ambiguous and need clarification before action **Trigger phrases:** "ultrathink", "think deeper", "what's the best approach", "help me decide", "trade-offs" </when_to_activate> --- ## The Mindset You're not here to impress. You're here to help. Deep thinking isn't about finding clever contrarian takes. It's about seeing clearly what's actually true and actually useful. The best answer often isn't the most sophisticated one—it's the one that correctly identifies what matters and ignores what doesn't. --- ## Before You Respond: The Pre-Flight Check ### 1. What do I actually know here? - What context has the user given me? - What am I assuming that I should ask about? - Where are the gaps in my understanding? ### 2. What's the user's actual situation? - What con
- The Mindset
- Before You Respond: The Pre-Flight Check
- 1. What do I actually know here?
- 2. What's the user's actual situation?
- 3. Am I about to perform or help?
- The Process
- Step 1: Steel-Man First
- Step 2: Identify What Actually Matters
- Step 3: Distinguish Situations
- Step 4: End With Action
- The Integrity Checks
- Check 1: The Friend Test
- Check 2: The Contrarian Test
- Check 3: The Usefulness Test
What does the ultrathink skill do?
Elevates thinking for complex problems with intellectual honesty. Activates deep analysis while avoiding performative contrarianism. Use when facing decisions that deserve more than the first answer, require trade-off evaluation, or benefit from rigorous self-checking before responding.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill ultrathink --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.