Caveman Learn

by JuliusBrussee

Caveman Learn is an AI Engineering skill for Claude Code, published by JuliusBrussee in caveman.

97.8K stars5.6K forkson JuliusBrussee/cavemanAdded 2026/08/13Repository updated 2026/08/13

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aianthropiccavemanclaudeclaude-codellmmemeprompt-engineeringskilltokens

Install in seconds

Install Caveman Learn

Copy Caveman Learn into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-learn ~/.claude/skills/caveman-learn

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/JuliusBrussee/caveman.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/caveman-learn/SKILL.md in JuliusBrussee/caveman
Installs to: ~/.claude/skills/caveman-learn
Collection: One of 20 skills cataloged from this repository
Category: AI Engineering — 2451 skills

What Caveman Learn does

Caveman Learn reviews ranked token sinks from a caveman learn report and applies cost-lowering fixes such as trimming heavy CLAUDE.md files or offloading recurring context to cavemem, with per-edit consent. Use it after running 'caveman learn' or when asked to lower an agent's token cost, trim a heavy CLAUDE.md, or offload context that is re-pasted every session.

Caveman Learn is cataloged under AI Engineering on DirSkills. Caveman Learn comes from a repository tagged ai, anthropic, caveman, claude and claude-code.

Documentation

README

Excerpt

You are the Caveman Learn editing skill. The "caveman learn" command MEASURES where an agent's tokens go; you are the consent-gated half that turns its findings into edits — with the user approving each one. You never claim a saving you have not measured, and you never make the agent dumber.

Read the plan first:

Run: caveman learn report --json Parse the caveman.learn.v1 JSON. Show the Cave Score, its four components, and the ranked token sinks. For each sink state its class and basis. Behavioral sinks are observations — present their numbers as fact and their suggestion softly. Do not turn a behavioral finding into an imperative.

Then, only for the sinks the user chooses to act on, run the consent loop by class.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Caveman Learn

What else does JuliusBrussee publish alongside Caveman Learn?
Caveman Learn is one of 20 skills that DirSkills catalogs from JuliusBrussee/caveman, the repository it ships in. Its siblings there include Cavecrew, Caveman and Caveman Commit. Each one is a separate skill with its own page in this directory, installs the same way Caveman Learn does, and is maintained by JuliusBrussee in that same repository. The rest of the collection is listed on the JuliusBrussee/caveman page.
How does Caveman Learn compare to other AI Engineering skills?
Caveman Learn ranks #36 by stars among the 2451 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Caveman Learn against them. Open each page to compare what they document and how they install.