Is the Caveman Project Open Source? License, Repository, and Installation Guide

Yes, the Caveman project is fully open source under the MIT License, hosted publicly on GitHub by JuliusBrussee with complete source code availability for cloning, modification, and commercial distribution.

The Caveman project is a token-compression utility that rewrites agent replies into "caveman-speak" to reduce output costs. If you are wondering whether the caveman project is open source, the answer is definitively yes—hosted on GitHub under the permissive MIT License. This repository provides full source code access, enabling developers to inspect, modify, and redistribute the software according to their needs.

MIT License and Open Source Status

The project is released under the MIT License, making it a permissive open-source project. The LICENSE file in the repository root explicitly grants rights to use, copy, modify, merge, publish, distribute, sublicense, and sell copies of the software. This license ensures that anyone can fork the repository, make changes, and use the code in both personal and commercial projects without legal restrictions.

Repository Structure and Key Components

Understanding the caveman project open source structure reveals a well-organized Node.js application with clear separation of concerns.

Core Plugin Implementation

The token-compression logic resides in [src/plugins/opencode/plugin.js](https://github.com/JuliusBrussee/caveman/blob/main/src/plugins/opencode/plugin.js). This file implements the algorithm that rewrites agent replies into "caveman-speak," achieving approximately 65% reduction in token count when using full compression mode.

Command Definitions

User-facing commands are defined in [commands/caveman.md](https://github.com/JuliusBrussee/caveman/blob/main/commands/caveman.md). This documentation includes the /caveman command syntax and the /caveman-commit variant for version control integration.

Installation Scripts

The repository includes one-line installers for cross-platform setup:

• [install.sh](https://github.com/JuliusBrussee/caveman/blob/main/install.sh) for macOS, Linux, and WSL
• install.ps1 for Windows PowerShell environments

Package Configuration

The [package.json](https://github.com/JuliusBrussee/caveman/blob/main/package.json) file declares Node.js ≥ 18 as a runtime requirement and lists all dependencies. This manifest confirms the project's open-source nature through its public npm registry presence under @juliusbrussee/caveman.

How to Install the Open Source Caveman Project

Because the caveman project is open source, you can install it via multiple methods depending on your environment.

Bash Installation (macOS/Linux/WSL)

Run the official installer script directly from the repository:

curl -fsSL https://raw.githubusercontent.com/JuliusBrussee/caveman/main/install.sh | bash

This script downloads the skill, registers it with detected agents, and configures the necessary hooks automatically.

Windows PowerShell Installation

For Windows environments, use the PowerShell equivalent:

irm https://raw.githubusercontent.com/JuliusBrussee/caveman/main/install.ps1 | iex

NPM Global Installation

Alternatively, install the package via npm for manual execution or custom tooling integration:

npm install -g @juliusbrussee/caveman

Using the Caveman Commands

After installation, invoke the compression mode inside any supported agent:

/caveman full

This command switches the agent to "full" compression level, which rewrites outputs into concise "caveman-speak" as defined in the command specifications.

Contributing to the Open Source Project

The JuliusBrussee/caveman repository accepts contributions through standard GitHub workflows. The codebase includes a comprehensive test suite in the tests/ directory to validate behavior across different agents. Community members can fork the repository, submit pull requests, and report issues through the public GitHub interface.

Summary

• The caveman project is open source under the permissive MIT License, allowing commercial and personal use.
• Source code availability includes complete access to compression algorithms, command definitions, and installation scripts via GitHub.
• Multiple installation methods support bash, PowerShell, and npm workflows for different operating systems.
• Node.js ≥ 18 is required to run the software, as specified in package.json.
• Public contributions are accepted through GitHub pull requests and issue tracking.

Frequently Asked Questions

Is the caveman project open source for commercial use?

Yes. The MIT License explicitly permits commercial use, distribution, and modification. Organizations can integrate the token-compression utility into proprietary software or internal tools without purchasing licenses or disclosing source code changes.

Where can I find the caveman project source code?

The complete source code is hosted in the JuliusBrussee/caveman repository on GitHub. Key files include the core logic in src/plugins/opencode/plugin.js, command definitions in commands/caveman.md, and the official MIT License text in LICENSE.

What license does the caveman project use?

The project uses the MIT License, a permissive open-source license that allows reuse with minimal restrictions. The only requirement is preserving the copyright notice and license text in distributed copies.

How do I verify the open source status of the caveman project?

You can verify the status by checking the LICENSE file in the repository root, which contains the official MIT License text. Additionally, the README.md displays an open-source license badge, and the repository's public visibility on GitHub confirms that anyone can clone, fork, and view the complete codebase.

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