About
This skill enables Claude Opus 4.5 to perform deep reasoning and complex analysis by engaging in extended internal deliberation before responding. It is designed for multi-step synthesis, self-critique, and handling problems that require thorough consideration. Developers should use it for tasks demanding nuanced, accurate, and less reactive outputs.
Quick Install
Claude Code
Recommendednpx skills add frankxai/arcanea -a claude-code/plugin add https://github.com/frankxai/arcaneagit clone https://github.com/frankxai/arcanea.git ~/.claude/skills/opus-extended-thinkingCopy and paste this command in Claude Code to install this skill
GitHub Repository
Frequently asked questions
What is the opus-extended-thinking skill?
opus-extended-thinking is a Claude Skill by frankxai. Skills package instructions and resources that Claude loads on demand, so Claude can perform opus-extended-thinking-related tasks without extra prompting.
How do I install opus-extended-thinking?
Use the install commands on this page: add opus-extended-thinking to Claude Code as a plugin, or clone its repository into your skills directory, then restart Claude so it picks up the skill.
What category does opus-extended-thinking belong to?
opus-extended-thinking is in the Design category, tagged ai and design.
Is opus-extended-thinking free to use?
Yes. opus-extended-thinking is listed on AIMCP and free to install. It runs inside Claude, so no separate service account is required to use the skill itself.
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