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 publish-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/publish-harness)<a href="https://agentmods.dev/skills/ruvnet/metaharness/publish-harness"><img src="https://agentmods.dev/badge/skills/ruvnet/metaharness/publish-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/publish-harness"><img src="https://agentmods.dev/badge/skills/ruvnet/metaharness/publish-harness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- 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 | $0.00379 |
| Opus 5.5 | $0.00015 | $0.00152 |
| Sonnet 5.5 | $0.00007 | $0.00076 |
| Haiku 4.5 | $0.00004 | $0.00038 |
Grade A, and why
publish-harness 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.
What it actually says
publish-harness
Codex skill that runs the full smoke-test → witness-sign → npm publish pipeline for a generated harness.
What it does
- Builds the harness with
npm run build - Runs
npm testto confirm green tests - Calls
harness signto produce a fresh witness manifest (requiresWITNESS_SIGNING_KEYenv) - Confirms
harness verifyaccepts the freshly signed manifest - Either:
dry_run=true(default): runsnpm publish --dry-runand reports tarball statsdry_run=false: runs the realnpm publish --provenance --access public
Usage from Codex
/publish-harness path=./my-harness
/publish-harness path=./my-harness dry_run=false
Equivalent CLI
cd ./my-harness
npm run build
npm test
harness sign
harness verify
npm publish --provenance --access public
Required env
WITNESS_SIGNING_KEY— 64-hex-char ed25519 seed (fetch from GCP Secret Manager viaharness secrets fetch WITNESS_SIGNING_KEY)NPM_TOKEN— npm registry credential (Codex skill assumes the host has it set, or fetches viaharness secrets fetch NPM_TOKEN)
See also
validate-harness— release-readiness gate (run this FIRST)harness-secrets— manage GCP-stored signing/publishing tokens
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 · 47 lines · 37 tokens per session scan A 4ff514d3ea9c
publish-harness is a skill published in the GitHub repository ruvnet/metaharness (716 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 379 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.
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