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md2: Skill for Claude Code

.agents/skills/caveman/SKILL.md

caveman is a skill for Claude Code, Codex from jan-bogaerts/md2. It costs 102 tokens per session (1,245 once invoked), scanned A, original, AGPL-3.0.

A compressed communication mode that shortens responses while keeping their technical meaning. It supports several compression styles and intensity levels.

In plain words
What is it for?
Use it when you ask for caveman mode, less text, or one of its supported communication styles.
Why use it?
It helps reduce the amount of text when you need a brief answer without dropping important technical details.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is jan-bogaerts/md2's own configuration. It tells Claude Code and Codex how to work on md2 itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything md2 configures →

not rated 42repo +3 yesterday A scan 102 tokens AGPL-3.0
View source ↗ jan-bogaerts/md2 jan-bogaerts.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to jan-bogaerts/md2. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/jan-bogaerts/md2/main/.agents/skills/caveman/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/jan-bogaerts/md2

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for caveman

README.md
[![agentmods](https://agentmods.dev/badge/skills/jan-bogaerts/md2/caveman/github.svg)](https://agentmods.dev/skills/jan-bogaerts/md2/caveman)
Your own site
<a href="https://agentmods.dev/skills/jan-bogaerts/md2/caveman"><img src="https://agentmods.dev/badge/skills/jan-bogaerts/md2/caveman/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for caveman

Your own site · 80×15
<a href="https://agentmods.dev/skills/jan-bogaerts/md2/caveman"><img src="https://agentmods.dev/badge/skills/jan-bogaerts/md2/caveman.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,245 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00102 $0.01245
Opus 5.5 $0.00041 $0.00498
Sonnet 5.5 $0.00020 $0.00249
Haiku 4.5 $0.00010 $0.00125

Measured 2mo ago against content hash 5e30bb56afbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

caveman scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agents/skills/caveman/SKILL.md · 78 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 78 lines · 102 tokens per session scan A 5e30bb56afbd

Subscribe to this mod's changes

caveman is a skill published in the GitHub repository jan-bogaerts/md2 (42 stars, last pushed yesterday), licensed AGPL-3.0. It adds 102 tokens to every session and 1,245 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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Related

caveman compared with skills from other repositories

caveman next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
cavemanjan-bogaerts/md2Skill42yesterdayAGPL-3.0A102Claude Code, Codex
todosJetBrains/thinkrailSkill7.9ktodayApache-2.0A58Claude Code, Codex
low-code-platformstravisjneuman/.claudeSkill107todayMITA54Claude Code, Codex
agent-desktoptravisjneuman/.claudeSkill107todayMITA38Claude Code, Codex
one-on-one-preptechwolf-ai/ai-first-toolkitSkill1391mo agoMITA67Claude Code
meeting-preptechwolf-ai/ai-first-toolkitSkill1391mo agoMITA50Claude Code
priority-plannertechwolf-ai/ai-first-toolkitSkill1391mo agoMITA68Claude Code