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 agentmods add skills/ruvnet/metaharness/example-harnessnpx 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.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00090 | $0.00816 |
| Opus 5 | $0.00045 | $0.00408 |
| Sonnet 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 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.
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.
- 4d ago First seen · 83 lines · 90 tokens per session scan A 7b15e4d48a61
example-harness is a skill published in the GitHub repository ruvnet/metaharness (630 stars, last pushed today), licensed MIT. It adds 90 tokens to every session and 816 once invoked, about $0.0005 per session on Opus 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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