workflowstacks
claude-skill

caveman: Cut Claude Token Usage 65% for Leaner Prompts

Boost LLM efficiency with caveman, a Go‑based Claude skill that trims tokens by two‑thirds—perfect for founders optimizing AI costs. 108k+ GitHub stars.
intermediate⏱ 30 minutes💵 Free (self-hosted)
110,922 stars+1,514★ this week6,423 forksGoGuide quality 9/10 · reviewed Sep 29Updated 10/10/2026100% free · open source
What it is

Use this skill to write like a caveman and automatically simplify your text into fewer tokens.

Real use case example

"A freelancer writes a lengthy website content block in Claude Code. They use the 'caveman' skill to rewrite it into a shorter, simpler text, and then schedule it on a Medium publication instantly. The rewritten text costs significantly less to generate and is published within minutes."

Best insideClaude Code
When to use it
  • •When you need to convey a simple message or instruction and want to minimize the amount of text used.
  • •In situations where character limits are a concern, such as in text messages or social media posts.
  • •For creating concise and straightforward content, such as product descriptions or instructional guides.
Ready-to-paste prompt
Input 'The sun is shining brightly in the clear blue sky' to see the caveman version, which might output 'Sun shine. Sky blue.'
Heads up: Ensure you have Node.js installed on your system and that your environment is set up to run JavaScript files before attempting to run the caveman script.
Saves to your device
Use with Claude
New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

⚡ Runs out of the box

A prompt/skill package — nothing to install beyond adding it to your AI tool.

Try it instantly — no install
Claude Code
mkdir -p ~/.claude/skills/caveman && curl -fsSL https://workflowstacks.com/api/skills/caveman/claude-skill -o ~/.claude/skills/caveman/SKILL.md
Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)
claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How caveman: Cut Claude Token Usage 65% for Leaner Prompts works
Codeflow
Free to inspect

Caveman: Cut Claude Token Usage 65% for Leaner Prompts is a very large Go project (~162k lines across 625 code files, plus 215 test files). You install it into your AI tool with one command; there is nothing to run yourself. Last commit this month, Other license, has a test suite.

Size
Very large codebase
~162k lines · 625 code files · days to read — use, don't read
Setup
Install as a skill / plugin
Add it to Claude Code (or your AI tool) with one command — 24 skills inside. Nothing to run yourself.
Runs on
Inside your AI tool
Helper scripts use Go · Node.js
Go 47%JavaScript 35%TypeScript 11%Python 6%
What happens, step by step

Tool reduces tokens

You give
User text
1Read Input
User gives text
2Shrink Text
Tool reduces tokens
mcp/server.go
3Return Output
Short text returned
You get
Short text
Where to start reading
  1. 1
    README.md
    Start here — what it does and how to install it
  2. 2
    AGENTS.md
    The instructions the AI actually follows
  3. 3
    mcp/server.go
    Where the program starts running
  4. 4
    skills/cavecrew/README.md
    Inside skills/ — an example of what the AI is told to do
What's in each folder
skills/Prompts, skills & agent definitions58 files
src/Core code — the actual logic32 files
agents/Prompts, skills & agent definitions21 files
commands/Prompts, skills & agent definitions10 files
packages/Sub-packages / plugins325 files
extension/Sub-packages / plugins40 files
plugins/Sub-packages / plugins20 files
integrations/Sub-packages / plugins15 files
READMEHas testsDocumentedCI checksOther licenseUpdated this month
Quick Actions
Details
Creator
JuliusBrussee
Language
Go
Category
claude-skill
Published
4/4/2026

Are you the creator of this tool? and earn 85% of every sale.

Show it off in your README:

Featured on WorkflowStacks
[![Featured on WorkflowStacks](https://workflowstacks.com/api/badge/caveman.svg)](https://workflowstacks.com/skills/caveman?utm_source=github&utm_medium=badge)
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Do this with a working workflow

Pages we wrote and tested that put a skill like this to work — importable n8n templates, outcome guides and Claude Desktop configs.

Outcome guide

Turn meeting notes into a summary email automatically

Paste the transcript into a private form and the workflow writes and emails a concise recap — decisions, owners, open questions — that people will actually read.

MCP config

GitHub MCP config

Search repos, read code, open issues and PRs from Claude.

MCP config

Filesystem MCP config

Let Claude read and write files in folders you choose.

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