caveman

caveman is a skill for Claude Code, Codex from OutlineDriven/odin-codex-plugin. It costs 59 tokens per session (632 once invoked), scanned A, original, Apache-2.0.

A response style that removes unnecessary words while keeping clear, grammatical English and exact technical details.

In plain words
What is it for?
Use it when the user asks for brevity, compact mode, or fewer tokens, or when a long session needs more concise responses.
Why use it?
It makes answers shorter and easier to scan when the conversation or output needs to use fewer words.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/outlinedriven/odin-codex-plugin/caveman
Any agent
npx skills add OutlineDriven/odin-codex-plugin --skill caveman
Clone the repo
git clone --depth 1 https://github.com/OutlineDriven/odin-codex-plugin

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/outlinedriven/odin-codex-plugin/caveman.svg)](https://agentmods.dev/skills/outlinedriven/odin-codex-plugin/caveman)
Your own site
<a href="https://agentmods.dev/skills/outlinedriven/odin-codex-plugin/caveman"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-codex-plugin/caveman.svg" alt="Measured on agentmods" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 632 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00059 $0.00632
Opus 5 $0.00030 $0.00316
Sonnet 5 $0.00012 $0.00126
Haiku 4.5 $0.00006 $0.00063

Measured 4d ago against content hash 11afe4a012cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 4d 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

Copies of this mod

1 near-identical copy found in the catalogue:

  • caveman — 100% identical, 0 lines differ
skills/caveman/SKILL.md · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Concise grammatical English — not telegraphic fragmentation. Compress through verbosity reduction; preserve articles, subject-verb agreement, and semantic precision. Keep technical terms exact, code blocks unchanged, error strings quoted verbatim.

When to invoke

  • User requests compact register: "caveman", "compact", "less tokens", "be brief", or invokes /caveman.
  • Long sessions where token budget pressures readability of further turns.
  • Bulk reporting where prose ceremony adds no decision value.

Once active, persist for every subsequent response until the user signals "stop caveman" or "normal mode".

What gets compressed

  • Filler adverbs: just, really, basically, actually, simply, essentially.
  • Pleasantry openers: Sure, Of course, Happy to, Let me.
  • Hedging phrases: I think, it might be, it would seem, perhaps we could.
  • Restated context the user already supplied.
  • Narrative meta-commentary: Now I will read the file, Next, let me check.
  • Redundant clauses ("the issue that is occurring is caused by") collapsed to ("the issue is caused by").

What is preserved

  • Articles: a, an, the. Sentences remain grammatical.
  • Subject-verb agreement, prepositions, conjunctions where they carry meaning.
  • Technical terms verbatim: function names, type names, error messages, file paths.
  • Code blocks unchanged; never compress code.
  • Decision-oriented register: imperatives, recommendations, trade-offs.
  • Causality and ordering: arrows (->) acceptable, but not at the cost of grammar.

Before / after

Before (verbose, ceremonial):

Sure! I'd be happy to help you with that. The issue you're experiencing is most likely caused by the fact that the authentication middleware is performing the token expiry comparison incorrectly — it's using a strict less-than comparison when it really should be using less-than-or-equal-to. Let me go ahead and fix that for you now.

After (caveman-adapted, grammatical):

The auth middleware compares token expiry with < instead of <=. Fix the operator.

Read the full file on GitHub · 55 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. 4d ago First seen · 55 lines · 59 tokens per session scan A 11afe4a012cf

Subscribe to this mod's changes

caveman is a skill published in the GitHub repository OutlineDriven/odin-codex-plugin (15 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 59 tokens to every session and 632 once invoked, about $0.0003 per session on Opus 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 2026-08-30.

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