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caveman-compress

caveman-compress is a skill for Claude Code, Codex from GktuOktay/ai-skills. It costs 77 tokens per session (1,154 once invoked), scanned A, a copy of caveman-compress, MIT.

A command-line tool for shortening memory files such as CLAUDE.md, todo lists, and preference files while preserving their technical content. It saves a human-readable backup outside the source directory before replacing the original.

In plain words
What is it for?
Use it with /caveman-compress and a file path when you want to compress agent instructions, preferences, or task notes without manually rewriting them.
Why use it?
Long memory files consume tokens every time they are loaded. This tool reduces that overhead while validating the compressed result and retaining a backup for recovery.

Skill for Claude CodeCodex

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

not rated 2repo 9d ago A scan 77 tokens copy · 86% MIT

Good fit Use it with /caveman-compress and a file path when you want to compress agent instructions, preferences, or task notes without manually rewriting them.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gktuoktay/ai-skills/caveman-compress
View source ↗ GktuOktay/ai-skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add GktuOktay/ai-skills --skill caveman-compress
Clone the repo
git clone --depth 1 https://github.com/GktuOktay/ai-skills

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-compress

README.md
[![agentmods](https://agentmods.dev/badge/skills/gktuoktay/ai-skills/caveman-compress/github.svg)](https://agentmods.dev/skills/gktuoktay/ai-skills/caveman-compress)
Your own site
<a href="https://agentmods.dev/skills/gktuoktay/ai-skills/caveman-compress"><img src="https://agentmods.dev/badge/skills/gktuoktay/ai-skills/caveman-compress/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-compress

Your own site · 80×15
<a href="https://agentmods.dev/skills/gktuoktay/ai-skills/caveman-compress"><img src="https://agentmods.dev/badge/skills/gktuoktay/ai-skills/caveman-compress.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,154 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 86% 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00077 $0.01154
Opus 5 $0.00039 $0.00577
Sonnet 5 $0.00015 $0.00231
Haiku 4.5 $0.00008 $0.00115

Measured 12d ago against content hash 3167d62440ee, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

caveman-compress 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 12d ago.

The scan reads SKILL.md. This mod also ships 7 executable files (scripts/__init__.py, scripts/__main__.py, scripts/benchmark.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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

86% identical to caveman-compress — 4 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.

.agents/skills/caveman-compress/SKILL.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Caveman Compress

Purpose

Compress natural language files (CLAUDE.md, todos, preferences) into caveman-speak to reduce input tokens. Compressed version overwrites original. Human-readable backup saved as <filename>.original.md, but NOT beside the source file — it lives in an out-of-tree data dir ($XDG_DATA_HOME/caveman-compress/backups/<parent-dir-name>/, or %LOCALAPPDATA%\caveman-compress\backups\<parent-dir-name>\ on Windows) so skill auto-loaders don't re-ingest it as a live file.

Trigger

/caveman-compress <filepath> or when user asks to compress a memory file.

Process

  1. The compression scripts live in scripts/ (adjacent to this SKILL.md). If the path is not immediately available, search for scripts/__main__.py next to this SKILL.md.

  2. From the directory containing this SKILL.md, run:

python3 -m scripts <absolute_filepath>

  1. The CLI will:
  • detect file type (no tokens)
  • call Claude to compress
  • validate output (no tokens)
  • if errors: cherry-pick fix with Claude (targeted fixes only, no recompression)
  • retry up to 2 times
  • if still failing after 2 retries: report error to user, leave original file untouched
  1. Return result to user

Compression Rules

Remove

  • Articles: a, an, the
  • Filler: just, really, basically, actually, simply, essentially, generally
  • Pleasantries: "sure", "certainly", "of course", "happy to", "I'd recommend"
  • Hedging: "it might be worth", "you could consider", "it would be good to"
  • Redundant phrasing: "in order to" → "to", "make sure to" → "ensure", "the reason is because" → "because"
  • Connective fluff: "however", "furthermore", "additionally", "in addition"

Preserve EXACTLY (never modify)

  • Code blocks (fenced ``` and indented)
  • Inline code (backtick content)
  • URLs and links (full URLs, markdown links)
  • File paths (/src/components/..., ./config.yaml)
  • Commands (npm install, git commit, docker build)
  • Technical terms (library names, API names, protocols, algorithms)
  • Proper nouns (project names, people, companies)
  • Dates, version numbers, numeric values
  • Environment variables ($HOME, NODE_ENV)

Read the full file on GitHub · 112 lines

Files

What ships with it

9 files 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. 12d ago First seen · 112 lines · 77 tokens per session scan A 3167d62440ee

Subscribe to this mod's changes

caveman-compress is a skill published in the GitHub repository GktuOktay/ai-skills (2 stars, last pushed 9d ago), licensed MIT. It adds 77 tokens to every session and 1,154 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to caveman-compress, differing in 4 lines, and is treated as a copy.

Claude CodeMemory and contextagent-skillsai-agentsai-skillsanti-sycophancyantigravity
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