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.
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.
npx skills add JuliusBrussee/caveman --skill caveman-managegit clone --depth 1 https://github.com/JuliusBrussee/cavemanWrote 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.
[](https://agentmods.dev/skills/juliusbrussee/caveman/caveman-manage)<a href="https://agentmods.dev/skills/juliusbrussee/caveman/caveman-manage"><img src="https://agentmods.dev/badge/skills/juliusbrussee/caveman/caveman-manage/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.
<a href="https://agentmods.dev/skills/juliusbrussee/caveman/caveman-manage"><img src="https://agentmods.dev/badge/skills/juliusbrussee/caveman/caveman-manage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00037 | $0.00850 |
| Opus 5.5 | $0.00015 | $0.00340 |
| Sonnet 5.5 | $0.00007 | $0.00170 |
| Haiku 4.5 | $0.00004 | $0.00085 |
Grade A, and why
caveman-manage 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.
Copies of this mod
3 near-identical copies found in the catalogue:
- caveman-manage — 100% identical, 0 lines differ
- caveman-manage — 92% identical, 8 lines differ
- caveman-manage — 92% identical, 8 lines differ
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Manage eval-gated experiments
Treat every lifecycle change as a production control action. Read current state and results, then report one supported recommendation or block. Current agent MCP is intentionally read-only: control-api does not yet enforce a complete lifecycle transition table and evidence gate atomically.
Non-negotiable gates
- A request to review, inspect, explain, or recommend authorizes reads only.
- Never approve an experiment whose results are pending, whose required guardrails are absent, or whose evidence reports a breach.
- Never convert experiment lift into
verified_savings. Only active real traffic plus provider-causal, provider-complete ledger evidence can do that. - Never supply an organization id. Project and tenant scope come from the logged-in Caveman identity and server RBAC.
- Never execute a lifecycle mutation, even after user approval. Exact
<action>:<experiment_id>strings are agent-generatable and are not proof of human intent. - Unknown states and server errors fail closed. Report exact
cave_snake_code.
Step 1 — Load project and experiment
Prefer MCP:
caveman_context {}
caveman_experiment_get {"action":"get","experiment_id":"<id>"}
caveman_experiment_get {"action":"results","experiment_id":"<id>"}
Use {"action":"list"} when the user has not named an id.
CLI fallback:
caveman cloud experiments list
caveman cloud experiments show <id>
caveman cloud experiments results <id>
Stop if login, project, experiment, or results are unavailable.
Step 2 — Evaluate evidence
Report:
- current lifecycle state and safety class;
- control and candidate sample sizes;
- quality or eval result;
- latency, error, cost, retry, drop, and escalation guardrails when present;
- evidence cost;
- rollback or hold reason;
- whether result is pending, failed, promotable, or active.
Absence is not a pass. If a required field is absent, state
evidence incomplete and do not propose approval.
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 · 113 lines · 37 tokens per session scan A 3404a3c8651d
caveman-manage is a skill published in the GitHub repository JuliusBrussee/caveman (120,216 stars, last pushed today), licensed Apache-2.0. It adds 37 tokens to every session and 850 once invoked, about $0.0001 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.
caveman-manage compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| caveman-manageJuliusBrussee/caveman | Skill | 120k | today | Apache-2.0 | A | 37 | Claude Code |
| dcf-modelNousResearch/hermes-agent | Skill | 263k | today | MIT | A | 14 | Claude Code, Codex |
| mle-workflowaffaan-m/ECC | Skill | 303k | today | MIT | A | 44 | Claude Code, Codex |
| autonomous-loopsaffaan-m/ECC | Skill | 303k | today | MIT | A | 26 | Claude Code, Kiro |
| ascii-videoNousResearch/hermes-agent | Skill | 263k | today | MIT | A | 17 | Claude Code, Codex |
| grounded-citationsNousResearch/hermes-agent | Skill | 263k | today | MIT | A | 16 | Claude Code, Codex |
| hermes-agent-skill-authoringNousResearch/hermes-agent | Skill | 263k | today | MIT | A | 22 | Claude Code, Codex |