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 ruvnet/metaharness --skill example-harnessgit clone --depth 1 https://github.com/ruvnet/metaharnessWrote 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/ruvnet/metaharness/example-harness)<a href="https://agentmods.dev/skills/ruvnet/metaharness/example-harness"><img src="https://agentmods.dev/badge/skills/ruvnet/metaharness/example-harness/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/ruvnet/metaharness/example-harness"><img src="https://agentmods.dev/badge/skills/ruvnet/metaharness/example-harness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 4 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 20 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Rogue Agent · line 20 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium MCP Rug Pull · line 74 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 75 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00090 | $0.00816 |
| Opus 5.5 | $0.00036 | $0.00326 |
| Sonnet 5.5 | $0.00018 | $0.00163 |
| Haiku 4.5 | $0.00009 | $0.00082 |
Grade A, and why
example-harness scanned grade A 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsSL https://raw.githubusercontent.com/ruvnet/agent-harness-generator/main/.codex/skills/example-harness/skill.toml \ How it starts
The opening of the file, as written. The whole thing — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
example-harness
One-command scaffolding from the 18 published @metaharness/* example
packages — the fastest path from a use-case to a working harness, no
template/host flags to remember.
Where create-harness walks the full wizard, this
skill maps a use-case straight onto a published npm wrapper. Each wrapper
shells out to metaharness@latest with the correct --template + --host
flags, so the result is byte-identical to the full CLI invocation.
Install
mkdir -p ~/.codex/skills/example-harness
curl -fsSL https://raw.githubusercontent.com/ruvnet/agent-harness-generator/main/.codex/skills/example-harness/skill.toml \
-o ~/.codex/skills/example-harness/skill.toml
No MCP server needed — the wrapper packages run via npx.
Use
/example-harness
Codex prompts for the package + a directory name, then runs:
npx --yes @metaharness/<package>@latest <name>
The 18 packages
Host integrations (scaffold a workspace wired for one runtime)
| Package | Scaffolds |
|---|---|
@metaharness/claude-code |
Claude Code workspace + plugin |
@metaharness/codex |
OpenAI Codex |
@metaharness/hermes |
Hermes cli-config |
@metaharness/pi-dev |
pi.dev AGENTS.md |
@metaharness/openclaw |
OpenClaw .openclaw/ |
@metaharness/rvm |
RVM deployment partition |
@metaharness/copilot |
VSCode / Copilot mcp.json |
@metaharness/opencode |
OpenCode .opencode/ |
@metaharness/github-actions |
GitHub Actions CI/CD (non-interactive) |
Vertical workflows (ready-made multi-agent pods)
| Package | Scaffolds |
|---|---|
@metaharness/devops |
incident response |
@metaharness/research |
multi-source dossier |
@metaharness/trading |
quant trading (paper-by-default) |
@metaharness/support |
customer support |
@metaharness/legal |
contract redline (drafts only) |
@metaharness/coding |
engineering pod |
@metaharness/education |
tutor pod |
@metaharness/sales |
sales pipeline pod |
@metaharness/gaming |
game-design pod |
@metaharness/repo-maintainer |
OSS repo maintainer |
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.
- 1mo ago First seen · 83 lines · 90 tokens per session scan A 7b15e4d48a61
example-harness is a skill published in the GitHub repository ruvnet/metaharness (709 stars, last pushed yesterday), licensed MIT. It adds 90 tokens to every session and 816 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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