Caveman skill
Makes your agent answer in short, blunt sentences: answer first, no fluff, every fact kept.
A Free skill. Sign-in opens soon.
- By
- Julius Brussee
- Licence
- Apache-2.0
- Installs
- 583.4K
- Works in
- 17 apps
What Caveman makes
Caveman changes how your AI talks. It answers first, drops the greetings, hedging and recaps, and keeps replies short. Code, commands, file paths, numbers and exact error messages are never changed. Articles can disappear when the sentence still reads fine, but words like not, never and only always stay.
The mode stays on for the whole session until you say "stop caveman" or "normal mode". It switches to plain full sentences for security warnings, irreversible actions, step-by-step instructions and when you seem confused. Two sibling modes go further: ultracave strips the grammar and megacave replies in classical Chinese.
Best for: People who read a lot of AI output and want it short, especially in a terminal.
- Answer first, then the reason, then the next step
- No greeting, hedging, pleasantries or closing offer
- Code, paths, numbers and errors stay exact
- Automatically switches to plain prose for warnings and risky actions
- Turn on with /caveman, off with "stop caveman"
Made with this skill
The same question answered twice, without and with Caveman. Ask an everyday question ("My phone says storage is almost full. What should I clear first?") once in the agent's normal voice and once with the Caveman skill on. Count the words. Any brands, names or numbers inside are invented examples.
Example prompts
Type something like this once the skill is added. Your app opens the skill when the request matches.
-
/caveman
-
Caveman mode: why does my React component re-render?
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Be brief. Explain this error in as few words as you can.
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Stop caveman.
What’s inside
5 files in the skill folder, with its Apache-2.0 licence kept inside. Only text instructions and reference files, no program files.
- SKILL.md the instructions
- LICENSE licence
- LICENSE-MIT licence
- NOTICE
- README.md
Which apps it works in
A skill is a folder of plain files, so any app that reads the open skills format can use it. Pick your app for its page.
How to add Caveman to your app
Step by step for each app. We say where to click, so you never need to leave this page.
ChatGPTby OpenAI
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Open the ChatGPT desktop app and look for Skills in the sidebar, where standalone skills are listed.
- 3 Add the “caveman” folder there if your version offers it. If you do not see Skills yet, use this skill in Claude or Codex instead.
- 4 In a chat, type @ and pick the skill, or just ask. Ask for what you want, for example: “/caveman”
To make your own, describe the workflow to @skill-creator in ChatGPT Work and it drafts a skill for you.
Claude appby Anthropic
- 1 Download the skill (.zip) with the button at the top of this page.
- 2 In the Claude app, open Settings > Features.
- 3 Upload the .zip file.
- 4 Ask for what you want, for example: “/caveman”
The current Claude Help Center lists Free, Pro, Max, Team and Enterprise. Organization policy can restrict uploads and sharing. Chat runs code in an isolated environment; uploading a skill does not give it your local project, coding-agent tools or unrestricted network access.
Codexby OpenAI
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.agents/skills - 3 Or paste the install prompt below into Codex and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Codex
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.agents/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .agents/skills inside that project instead.
Claude Codeby Anthropic
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.claude/skills - 3 Or paste the install prompt below into Claude Code and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Claude Code
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.claude/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
Built-in installer: claude plugin marketplace add <owner/repo>
Built-in installer: claude plugin install <plugin>@<marketplace>
To use the skill in one project only, put it in .claude/skills inside that project instead.
Cursor
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.cursor/skills - 3 Or paste the install prompt below into Cursor and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Cursor
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.cursor/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .cursor/skills inside that project instead. Cursor also reads ~/.agents/skills, ~/.claude/skills, ~/.codex/skills.
GitHub Copilotby GitHub
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.copilot/skills - 3 Or paste the install prompt below into GitHub Copilot and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into GitHub Copilot
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.copilot/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
Built-in installer: gh skill install <owner/repo> <skill> --agent github-copilot --scope user
To use the skill in one project only, put it in .github/skills inside that project instead. GitHub Copilot also reads ~/.agents/skills.
Gemini CLIby Google
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.gemini/skills - 3 Or paste the install prompt below into Gemini CLI and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Gemini CLI
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.gemini/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
Built-in installer: gemini skills install <git-url>
To use the skill in one project only, put it in .gemini/skills inside that project instead. Gemini CLI also reads ~/.agents/skills.
Windsurf
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.codeium/windsurf/skills - 3 Or paste the install prompt below into Windsurf and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Windsurf
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.codeium/windsurf/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .windsurf/skills inside that project instead.
Kiro
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.kiro/skills - 3 Or paste the install prompt below into Kiro and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Kiro
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.kiro/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .kiro/skills inside that project instead.
Antigravityby Google
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.gemini/antigravity/skills - 3 Or paste the install prompt below into Antigravity and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Antigravity
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.gemini/antigravity/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .agents/skills inside that project instead.
OpenCode
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.config/opencode/skills - 3 Or paste the install prompt below into OpenCode and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into OpenCode
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.config/opencode/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .opencode/skills inside that project instead. OpenCode also reads ~/.agents/skills, ~/.claude/skills.
Cline
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.agents/skills - 3 Or paste the install prompt below into Cline and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Cline
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.agents/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .agents/skills inside that project instead.
Amp
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.config/agents/skills - 3 Or paste the install prompt below into Amp and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Amp
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.config/agents/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
Built-in installer: amp skill add <github-url> --global
To use the skill in one project only, put it in .agents/skills inside that project instead. Amp also reads ~/.agents/skills, ~/.config/amp/skills, ~/.claude/skills.
Gooseby Block
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.agents/skills - 3 Or paste the install prompt below into Goose and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Goose
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.agents/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .agents/skills inside that project instead. Goose also reads ~/.claude/skills.
OpenClaw
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.openclaw/skills - 3 Or paste the install prompt below into OpenClaw and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into OpenClaw
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.openclaw/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
Built-in installer: openclaw skills install @owner/<slug>
Built-in installer: openclaw skills install @owner/<slug> --global
Built-in installer: openclaw skills install git:owner/repo@ref
To use the skill in one project only, put it in skills inside that project instead. OpenClaw also reads ~/.agents/skills.
Hermes Agentby Nous Research
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.hermes/skills - 3 Or paste the install prompt below into Hermes Agent and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into Hermes Agent
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.hermes/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
Built-in installer: hermes skills install <owner/repo/skill>
VS Codeby Microsoft
- 1 Download the skill (.zip) with the button at the top of this page, then unzip it.
- 2 Move the “caveman” folder into your skills folder:
~/.copilot/skills - 3 Or paste the install prompt below into VS Code and let it do the copying.
- 4 Start a new session. Ask for what you want, for example: “/caveman”
Install prompt: paste this into VS Code
I downloaded the agent skill "Caveman" as caveman.zip. Unzip it and copy the caveman folder into ~/.copilot/skills. Before you finish, list every file it contains, show me any scripts and what they do, and stop if anything asks for passwords, API keys or downloads from other websites.
To use the skill in one project only, put it in .github/skills inside that project instead. VS Code also reads ~/.claude/skills, ~/.agents/skills.
Questions about Caveman
Does it save money?
It aims to cut output length, but the savings are modest. The README reports that on the current version one single test showed about 3 percent fewer output tokens than a plain "answer concisely" instruction, which is inside the noise.
Does it make answers less accurate?
The rules keep every technical fact and prefer clarity over compression when the two conflict. No quality-equivalence claim is published.
Does it change my code or commit messages?
No. Anything saved outside the chat, such as code, comments, commits and docs, is written in normal prose.
Is the Caveman skill free?
Yes. It is a Free skill on Best Agent Skills. Sign-in opens soon; when it does, a free account is all you need to download it.
Who made the Caveman skill?
Julius Brussee. We did not write it. Best Agent Skills curates skills like this one, explains them in plain words and shows how to add them to your app. It is shared under the Apache-2.0 licence (Copyright [yyyy] [name of copyright owner]).
