ultrathink — Claude Code skill: what it does, how to install
The skill displays colorful ANSI art of the word "ultrathink" in the terminal. It triggers on the word itself or via /ultrathink.
npx skills add intellectronica/agent-skills --skill ultrathink -a claude-codeWhat ultrathink does
The skill runs a single Bash printf command that renders the word "ultrathink" using ANSI escape codes. It explicitly instructs the agent to avoid adding any commentary or side notes around the art.
Under the hood, there is just one string packed with color sequences and box-drawing symbols. It relies on a working Bash shell with printf and an ANSI-compatible terminal. On systems without escape sequence handling, the output breaks into unreadable control characters.
What it helps with
- display colorful ultrathink ANSI banner in the terminal
- verify ANSI color support in the agent terminal
- print stylized text without commentary from the model
Example prompts for the agent
- /ultrathink
- print ultrathink
- display ultrathink art
How to install ultrathink
1Skills CLI (Vercel)
npx skills add intellectronica/agent-skills --skill ultrathink -a claude-code2Manually: put the files in place
~/.claude/skills/ultrathink/SKILL.mdCopy the whole skill folder; for one project use .claude/skills/ultrathink/
1Skills CLI (Vercel)
npx skills add intellectronica/agent-skills --skill ultrathink -a codex2Manually: put the files in place
.agents/skills/ultrathink/SKILL.mdFor all projects use ~/.agents/skills/
1Skills CLI (Vercel)
npx skills add intellectronica/agent-skills --skill ultrathink -a cursor2Manually: put the files in place
.cursor/skills/ultrathink/SKILL.mdCursor also reads .agents/skills/ and .claude/skills/
1GitHub CLI
gh skill install intellectronica/agent-skills ultrathink2Manually: put the files in place
.github/skills/ultrathink/SKILL.md1Skills CLI (Vercel)
npx skills add intellectronica/agent-skills --skill ultrathink -a gemini-cli2Platform CLI
gemini skills install https://github.com/intellectronica/agent-skills --path skills/ultrathinkManually: put the files in place
.devin/skills/ultrathink/SKILL.mdThe legacy .windsurf/skills/ path still works
Skills CLI (Vercel)
npx skills add intellectronica/agent-skills --skill ultrathink -a opencodeClaude.ai
Zip the folder and upload it in Settings → Capabilities → Skills
Step by step, with commands for each platform: How to install skills in Claude Code: five ways
Questions about ultrathink
How to install ultrathink in Claude Code?
Run npx skills add intellectronica/agent-skills --skill ultrathink -a claude-code.
What does ultrathink do?
It triggers a Bash printf command that prints a colorful ANSI banner for "ultrathink". The agent returns the art directly without extra commentary.
What is required to run ultrathink?
You need an environment with Bash and a terminal that renders ANSI color codes.
Source text
SKILL.md · CC0-1.0
--- name: ultrathink description: Display colorful ANSI art of the word "ultrathink". Use when the user says "ultrathink" or invokes /ultrathink. --- # Ultrathink When this skill is invoked, run this Bash command to display colourful ANSI art: ```bash printf '\n \033[1;31m╦ ╦\033[1;33m╦ \033[1;32m╔╦╗\033[1;36m╦═╗\033[1;34m╔═╗\033[1;35m╔╦╗\033[1;31m╦ ╦\033[1;33m╦\033[1;32m╔╗╔\033[1;36m╦╔═\033[0m\n \033[1;31m║ ║\033[1;33m║ \033[1;32m║ \033[1;36m╠╦╝\033[1;34m╠═╣\033[1;35m ║ \033[1;31m╠═╣\033[1;33m║\033[1;32m║║║\033[1;36m╠╩╗\033[0m\n \033[1;31m╚═╝\033[1;33m╩═╝\033[1;32m ╩ \033[1;36m╩╚═\033[1;34m╩ ╩\033[1;35m ╩ \033[1;31m╩ ╩\033[1;33m╩\033[1;32m╝╚╝\033[1;36m╩ ╩\033[0m\n\n' ``` Do not add any other output or commentary.
© intellectronica · CC0-1.0 · intellectronica/agent-skills
