caveman-evidence-review

caveman-evidence-review is a skill for Claude Code from JuliusBrussee/caveman. It costs 47 tokens per session (908 once invoked), scanned A, original, Apache-2.0.

A read-only tool for examining evidence collected by Caveman Cloud about AI-assisted coding work. The evidence includes spending, workflow traces, response times, errors, routing, and savings.

In plain words
What is it for?
Use it to investigate Caveman Cloud findings, spending by workflow, slow or failing operations, routing decisions, and reported savings.
Why use it?
It helps explain where AI usage costs come from and how coding workflows are performing without changing the project.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the caveman plugin — 22 skills, 9 commands, 3 agents shipped together

Good fit Use it to investigate Caveman Cloud findings, spending by workflow, slow or failing operations, routing decisions, and reported savings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/juliusbrussee/caveman/caveman-evidence-review
About the project

caveman is a skill and proxy for coding agents that shortens unnecessary explanatory prose so agents use fewer tokens while leaving code, commands, paths, and error messages unchanged. It is for people using coding agents who want terse responses and lower token use, including with Claude-based workflows. The catalogue entries contain its skills, commands, agents, instructions, and plugins.

JuliusBrussee/caveman · 115,313 stars · on GitHub · docs.caveman.so

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 JuliusBrussee/caveman --skill caveman-evidence-review
Clone the repo
git clone --depth 1 https://github.com/JuliusBrussee/caveman

Made for: Claude Code.

Or install caveman, the plugin that ships this one along with the rest of its 22 skills, 9 commands, 3 agents.

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-evidence-review

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/juliusbrussee/caveman/caveman-evidence-review"><img src="https://agentmods.dev/badge/skills/juliusbrussee/caveman/caveman-evidence-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 908 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. Third-party audits
  • Socket pass 14 Sept 2026
  • Snyk pass 14 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00047 $0.00908
Opus 5.5 $0.00019 $0.00363
Sonnet 5.5 $0.00009 $0.00182
Haiku 4.5 $0.00005 $0.00091

Measured 1mo ago against content hash 05bd896c76a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

caveman-evidence-review 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 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.

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

3 near-identical copies found in the catalogue:

skills/caveman-evidence-review/SKILL.md · 143 lines

How it starts

The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Caveman evidence

Act as a read-only operator. Build conclusions from current Caveman data, not from repository guesses. Never start, approve, cancel, or roll back an experiment from this skill.

Hard rules

  1. Keep these buckets separate:
    • measured provider-complete list-price cost;
    • inferred daily headroom;
    • verified ledger savings;
    • evidence cost. Never add or relabel them.
  2. Do not fetch prompt, completion, tool, or artifact payloads unless the user explicitly asks for payload review. Metadata, spans, timing, models, token counts, status, and optimizer attribution are enough for the default review.
  3. Scope every read to the project selected by Caveman context. Never supply an organization id.
  4. Empty results are evidence of no current signal, not zero cost or zero risk.
  5. Cite trace ids and exact time windows used. Do not claim a cause from an aggregate alone.

Step 1 — Load context

Prefer MCP:

caveman_context {}

CLI fallback:

caveman cloud whoami
caveman cloud projects list

Stop if login or project selection is missing. Ask the user to run caveman login or select a project; never guess.

Step 2 — Establish baseline

Use caveman_report for:

  • overview
  • costs
  • score
  • workflows
  • verified_savings

Then use caveman_plan for ranked daily headroom. If question is narrow, skip unrelated reports. Read shortest set that can answer it.

CLI fallback:

caveman cloud costs
caveman cloud score
caveman cloud plan --json

State report window and basis before interpreting direction.

Step 3 — Test the leading explanation with traces

Use caveman_trace_search. Choose a bounded window and closed filters: workflow, agent, model, provider, error code, runtime mode, cache status, optimization id, status class, token/cost/latency bounds, compression, or monitor verdict.

Useful groupings:

  • workflow — find jobs driving cost or failures;
  • model — compare model mix;
  • session — isolate retry or loop behavior;
  • ungrouped — identify exact traces.

Read the full file on GitHub · 143 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 First seen · 143 lines · 47 tokens per session scan A 05bd896c76a4

Subscribe to this mod's changes

caveman-evidence-review is a skill published in the GitHub repository JuliusBrussee/caveman (115,313 stars, last pushed yesterday), licensed Apache-2.0. It adds 47 tokens to every session and 908 once invoked, about $0.0002 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 2026-08-30.