harness-secrets

harness-secrets is a skill for Claude Code from ruvnet/metaharness. It costs 0 tokens per session (341 once invoked), scanned A, original, MIT.

A tool for checking Google Cloud Secret Manager setup, retrieving stored secret values, or verifying an npm publishing token without publishing anything. Google Cloud Secret Manager is a service for storing sensitive values such as tokens.

In plain words
What is it for?
Use it to check cloud authentication and secret configuration, fetch a secret for a pipeline, or run npm account verification before tagging a release.
Why use it?
It lets release workflows verify and rotate credentials without keeping long-lived secret keys in the code or triggering an accidental release.

Skill for Claude Code

Written for Claude Code: a Claude Code plugin manifest. Also seen: mentions Codex.

Part of the agent-harness-generator plugin — 14 skills, 1 plugin shipped together

Good fit Use it to check cloud authentication and secret configuration, fetch a secret for a pipeline, or run npm account verification before tagging a release.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ruvnet/metaharness/harness-secrets
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 ruvnet/metaharness --skill harness-secrets
Clone the repo
git clone --depth 1 https://github.com/ruvnet/metaharness

Made for: Claude Code.

Or install agent-harness-generator, the plugin that ships this one along with the rest of its 14 skills, 1 plugin.

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 harness-secrets

README.md
[![agentmods](https://agentmods.dev/badge/skills/ruvnet/metaharness/harness-secrets/github.svg)](https://agentmods.dev/skills/ruvnet/metaharness/harness-secrets)
Your own site
<a href="https://agentmods.dev/skills/ruvnet/metaharness/harness-secrets"><img src="https://agentmods.dev/badge/skills/ruvnet/metaharness/harness-secrets/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 harness-secrets

Your own site · 80×15
<a href="https://agentmods.dev/skills/ruvnet/metaharness/harness-secrets"><img src="https://agentmods.dev/badge/skills/ruvnet/metaharness/harness-secrets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 341 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
  • 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 $0.00000 $0.00341
Opus 5 $0.00000 $0.00170
Sonnet 5 $0.00000 $0.00068
Haiku 4.5 $0.00000 $0.00034

Measured 9d ago against content hash 8ea9cc60cfd9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

harness-secrets 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 9d 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.

.claude-plugin/skills/harness-secrets/SKILL.md · 48 lines

What it actually says

harness-secrets

Codex skill for GCP Secret Manager — check / fetch / validate-token.

Modes

check

Validates the full GCP setup (gcloud on PATH, active project, auth principal, secret exists, WIF pool present). Use this when bootstrapping a new GCP project for publish.

/harness-secrets mode=check
/harness-secrets mode=check secret=NPM_TOKEN_DEV
/harness-secrets mode=check project=my-gcp-project secret=NPM_TOKEN

fetch

Fetches a secret value to stdout. Use in pipelines:

/harness-secrets mode=fetch secret=NPM_TOKEN
/harness-secrets mode=fetch secret=GH_TOKEN version=3

validate-token

Fetches NPM_TOKEN and runs npm whoami against the registry. No publish — just confirms the token isn't revoked. Use this BEFORE you tag a release.

/harness-secrets mode=validate-token
/harness-secrets mode=validate-token secret=NPM_TOKEN_STAGING

Equivalent CLI

harness secrets check --secret=NPM_TOKEN
harness secrets fetch NPM_TOKEN --version=3
harness secrets validate-token

Why this exists

So you can refresh + verify the publish-time GCP secret WITHOUT triggering a real publish.

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. 9d ago First seen · 48 lines · 0 tokens per session scan A 8ea9cc60cfd9

Subscribe to this mod's changes

harness-secrets is a skill published in the GitHub repository ruvnet/metaharness (639 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 341 tokens. 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.

Related

Other skills, from other repositories