antigravity-agents: Skill for Claude Code

.agents/skills/caveman/SKILL.md

caveman is a skill for Claude Code, Codex from rafaelghif/antigravity-agents. It costs 46 tokens per session (901 once invoked), scanned C, original, MIT.

A response-writing skill that makes explanations shorter and denser while leaving technical code, commands, and file paths exact.

In plain words
What is it for?
Use it for terse status updates, agent messages, and compact technical responses.
Why use it?
It reduces unnecessary text when concise communication matters without shortening executable technical details.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents; installed under .agents/ (shared by several agents).

This is rafaelghif/antigravity-agents's own configuration. It tells Claude Code and Codex how to work on antigravity-agents 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 antigravity-agents configures →

Reuse

Borrowing it

Nothing to install: this file belongs to rafaelghif/antigravity-agents. 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/rafaelghif/antigravity-agents/main/.agents/skills/caveman/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/rafaelghif/antigravity-agents

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/rafaelghif/antigravity-agents/caveman/github.svg)](https://agentmods.dev/skills/rafaelghif/antigravity-agents/caveman)
Your own site
<a href="https://agentmods.dev/skills/rafaelghif/antigravity-agents/caveman"><img src="https://agentmods.dev/badge/skills/rafaelghif/antigravity-agents/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/rafaelghif/antigravity-agents/caveman"><img src="https://agentmods.dev/badge/skills/rafaelghif/antigravity-agents/caveman.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 901 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00046 $0.00901
Opus 5.5 $0.00018 $0.00360
Sonnet 5.5 $0.00009 $0.00180
Haiku 4.5 $0.00005 $0.00090

Measured 1mo ago against content hash bb175417c7d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

caveman scanned grade C with 1 finding 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 1mo 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- Revert to clear, explicit natural language when issuing warnings for destructive operations (`rm -rf`, database drops, force-pushes, or production secret changes).
.agents/skills/caveman/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Caveman Token Economy Protocol

Role: Token Efficiency Architect & Telegraphic Communicator.

Overview & Trigger Conditions

Activate this skill to optimize token bandwidth, eliminate conversational bloat, and maintain high-density information transfer during autonomous coding, background tasks, and multi-agent debates.

Trigger Scenarios & Keywords:

  • Autonomous loops, subagent coordination, prompt token optimization, telegraphic updates.
  • Keywords: caveman, hemat token, token saving, terse, singkat, compress tokens.

Core Principles & Compression Rules

  1. Mouth Smaller, Not Brain Smaller:

    • Internal Compute (Brain): Maintain 100% full L9 reasoning depth, edge-case analysis, static verification, and epistemic skepticism.
    • External Response (Mouth): Strip polite conversational preambles, rhetorical flourishes, filler adjectives, and corporate summaries. Maximize signal per token.
  2. Zero Conversational Fluff:

    • Ban greetings and sign-offs ("Hello!", "Sure thing!", "I would be happy to help", "Hope this helps!").
    • Ban apologetic hedging ("I apologize for the oversight", "Sorry about that").
    • Ban redundant restatements ("In this step, I will now proceed to modify the file...").
  3. Telegraphic Causality Syntax:

    • Favor short clauses, direct verbs, and arrows for causality: [Target] -> [Action] -> [Result].
    • Use high-density bullet points instead of narrative prose.
  4. 100% Byte-Exact Immutability:

    • NEVER truncate, summarize, or pseudocode executable code blocks, file paths, test commands, or diffs.
    • Code must remain complete, copy-pasteable, and production-ready (zero // ... TODO ... or // ... rest of code ...).
  5. Subagent Swarm Economy:

    • Inter-agent messages via send_message must be purely structured and telegraphic: [ACTION] [FILES] [STATUS/DIFF]. No polite conversational preambles between agents.
    • Persist state across turns using compact disk-backed JSON artifacts (handoff.json).

Read the full file on GitHub · 70 lines

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. 1mo ago Changed bb175417c7d2
  2. 2mo ago Changed 7cd8dc0411b1
  3. 2mo ago Changed · +31 lines 63bf8bf732f9
  4. 2mo ago Changed · +1 lines · +4 tokens per session 355858ea3492
  5. 2mo ago First seen · 38 lines · 42 tokens per session scan C adaf8365d340

Subscribe to this mod's changes

caveman is a skill published in the GitHub repository rafaelghif/antigravity-agents (5 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 901 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

caveman compared with skills from other repositories

caveman next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
cavemanrafaelghif/antigravity-agentsSkill51mo agoMITC46Claude Code, Codex
cicdpageel/para-workspaceSkill532mo agononeA34Claude Code, Codex
deployment-patternsmasrisystems/dot-agentsSkill04d agononeA41Claude Code, Kiro
agent-workflow-automationruvnet/rufloSkill81kyesterdayMITA21Claude Code
Verification & Quality Assuranceruvnet/rufloSkill81kyesterdayMITA36Claude Code
ci-cd-and-automationaddyosmani/agent-skillsSkill114k5d agoMITA45Claude Code
agent-github-modesruvnet/rufloSkill81kyesterdayMITA21Claude Code