A compressed communication mode that removes filler words and shortens responses while keeping technical details. It changes how the agent writes after the user activates it.

Use it when requesting concise replies, lower token use, or a deliberately shortened style such as “caveman mode”.

It reduces the amount of text used for terse technical conversations. This can make brief answers easier to scan when full explanations are not needed.

How AlexisBalayre/claude-code-power-config configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to AlexisBalayre/claude-code-power-config. 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/AlexisBalayre/claude-code-power-config/main/.claude/skills/caveman/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/AlexisBalayre/claude-code-power-config

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/alexisbalayre/claude-code-power-config/caveman/github.svg)](https://agentmods.dev/skills/alexisbalayre/claude-code-power-config/caveman)

Your own site

<a href="https://agentmods.dev/skills/alexisbalayre/claude-code-power-config/caveman"><img src="https://agentmods.dev/badge/skills/alexisbalayre/claude-code-power-config/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/alexisbalayre/claude-code-power-config/caveman"><img src="https://agentmods.dev/badge/skills/alexisbalayre/claude-code-power-config/caveman.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 449 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 100% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.00068	$0.00449
Opus 5.5	$0.00027	$0.00180
Sonnet 5.5	$0.00014	$0.00090
Haiku 4.5	$0.00007	$0.00045

Measured 2mo ago against content hash b4bb6fe3bf3d, 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.

Origin

This is a copy

100% identical to caveman — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/caveman/SKILL.md · 50 lines

What it actually says

Respond terse like smart caveman. All technical substance stay. Only fluff die.

Persistence

ACTIVE EVERY RESPONSE once triggered. No revert after many turns. No filler drift. Still active if unsure. Off only when user says "stop caveman" or "normal mode".

Rules

Drop: articles (a/an/the), filler (just/really/basically/actually/simply), pleasantries (sure/certainly/of course/happy to), hedging. Fragments OK. Short synonyms (big not extensive, fix not "implement a solution for"). Abbreviate common terms (DB/auth/config/req/res/fn/impl). Strip conjunctions. Use arrows for causality (X -> Y). One word when one word enough.

Technical terms stay exact. Code blocks unchanged. Errors quoted exact.

Pattern: [thing] [action] [reason]. [next step].

Not: "Sure! I'd be happy to help you with that. The issue you're experiencing is likely caused by..." Yes: "Bug in auth middleware. Token expiry check use < not <=. Fix:"

Examples

"Why React component re-render?"

Inline obj prop -> new ref -> re-render. useMemo.

"Explain database connection pooling."

Pool = reuse DB conn. Skip handshake -> fast under load.

Auto-Clarity Exception

Drop caveman temporarily for: security warnings, irreversible action confirmations, multi-step sequences where fragment order risks misread, user asks to clarify or repeats question. Resume caveman after clear part done.

Example -- destructive op:

Warning: This will permanently delete all rows in the users table and cannot be undone.
DROP TABLE users;
Caveman resume. Verify backup exist first.

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.

2mo ago First seen · 50 lines · 68 tokens per session scan A b4bb6fe3bf3d

Subscribe to this mod's changes

caveman is a skill published in the GitHub repository AlexisBalayre/claude-code-power-config (2 stars, last pushed 1mo ago), licensed MIT. It adds 68 tokens to every session and 449 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to caveman, differing in 0 lines, and is treated as a copy.

Claude Code Productivity agents ai anthropic claude developer-tools

send-email

Compose and send a one-off email to a named recipient via Resend - written in the operator's voice, then sent in-run through the shared send caps with an operator audit copy.

aeonfun/aeon · 39 tokens

caveman-help

Quick-reference card for all caveman modes, skills, and commands. One-shot display, not a persistent mode. Trigger: /caveman-help, "caveman help", "what caveman commands", "how do I use caveman".

stevesolun/ctx · 56 tokens

get-started

First-run setup for the Aeon plugin. Checks the connection to the user's Aeon agent, shows what it can do, and runs one skill so the user sees it work. Use right after the plugin is installed, or when the user asks how to get started with Aeon.

aeonfun/aeon · 61 tokens

skill-factory

A workflow that examines completed session work and turns reusable patterns into Claude Code skills.

sangrokjung/claude-forge · 122 tokens

session-wrap

Use when wrapping up a session before ending. 4 parallel subagents detect doc updates, repeated patterns, learning points, and follow-ups, then a verifier deduplicates and presents choices. Triggers on /session-wrap, session wrap, session cleanup, end of session.

sangrokjung/claude-forge · 58 tokens

toolbox

Pre/post dev toolbox — named bundles of skills/agents loaded before development work and councils of experts invoked after. Run /toolbox or the toolbox.py CLI to list, activate, initialize, export, import, and validate toolboxes. Invoke at the start or end of a dev session, when setting up a new repo, or when sharing…

stevesolun/ctx · 77 tokens

claude-code-power-config: Skill for Claude Code