viral-ngs: Skill for Claude Code

.agents/skills/claude-on-vertex-ci/SKILL.md

claude-on-vertex-ci is a skill for Claude Code, Codex from broadinstitute/viral-ngs. It costs 0 tokens per session (2,305 once invoked), scanned A, original, MIT.

Reusable setup for running Claude Code inside GitHub Actions on Google Vertex AI, Google Cloud’s managed AI platform. It uses Workload Identity Federation, which lets GitHub authenticate without storing long-lived cloud keys.

In plain words
What is it for?
Adding automated pull-request reviews, vulnerability triage, dependency analysis, documentation generation, and other scheduled or event-driven AI jobs in GitHub Actions.
Why use it?
It provides a documented way to run AI tasks from GitHub events while avoiding permanent credentials in repository secrets. Results can be returned as issue comments, pull-request comments, or build artifacts.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument; mentions Claude Code; installed under .agents/ (shared by several agents).

This is broadinstitute/viral-ngs's own configuration. It tells Claude Code and Codex how to work on viral-ngs itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything viral-ngs configures →

Reuse

Borrowing it

Nothing to install: this file belongs to broadinstitute/viral-ngs. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/broadinstitute/viral-ngs/main/.agents/skills/claude-on-vertex-ci/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/broadinstitute/viral-ngs

Made for: Claude Code, Codex.

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 claude-on-vertex-ci

README.md
[![agentmods](https://agentmods.dev/badge/skills/broadinstitute/viral-ngs/claude-on-vertex-ci/github.svg)](https://agentmods.dev/skills/broadinstitute/viral-ngs/claude-on-vertex-ci)
Your own site
<a href="https://agentmods.dev/skills/broadinstitute/viral-ngs/claude-on-vertex-ci"><img src="https://agentmods.dev/badge/skills/broadinstitute/viral-ngs/claude-on-vertex-ci/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 claude-on-vertex-ci

Your own site · 80×15
<a href="https://agentmods.dev/skills/broadinstitute/viral-ngs/claude-on-vertex-ci"><img src="https://agentmods.dev/badge/skills/broadinstitute/viral-ngs/claude-on-vertex-ci.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 2,305 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 warn 7 Sept 2026
SkillSpector: 2 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 18
    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 Agent Snooping · line 214
    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.
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 $0.02305
Opus 5 $0.00000 $0.01153
Sonnet 5 $0.00000 $0.00461
Haiku 4.5 $0.00000 $0.00231

Measured 13d ago against content hash b72d42405125, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

claude-on-vertex-ci 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 13d 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.

.agents/skills/claude-on-vertex-ci/SKILL.md · 221 lines

How it starts

The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude on Vertex AI from GitHub Actions

Reusable infrastructure for invoking Claude (via anthropics/claude-code-action) on Google Vertex AI from GitHub Actions workflows in this repo. Authentication is via Workload Identity Federation — no long-lived secrets.

When to Use

Add a new Claude-in-CI use case (PR review, CVE triage, dependency-update analysis, automated docs generation, etc.) when:

  • The task is well-suited to an LLM with tool use (reading files, running CLI commands, calling gh)
  • The task fires on a GitHub event (schedule, workflow_dispatch, push, PR)
  • You want an issue, PR comment, or artifact as the output

The first use case (and template) is the CVE triage step in container-scan.yml — see .agents/skills/container-vulns/SKILL.md.

What's Already Provisioned

GCP project: viral-seq-ai

Resource Identifier
Workload Identity Pool github-actions-pool (global)
OIDC provider broadinstitute-github
Provider attribute condition assertion.repository_owner == 'broadinstitute'
Required APIs aiplatform.googleapis.com, iamcredentials.googleapis.com

Service accounts (one per use case):

SA email Use case Workflow
[email protected] Weekly CVE triage .github/workflows/container-scan.yml

The pool + provider are reusable across use cases. Add a new SA per use case (principle of least privilege; easier to audit and disable individually).

Adding a New Claude-in-CI Use Case

You need GCP IAM Admin on viral-seq-ai for steps 1–3.

1. Create a service account scoped to the use case

gcloud iam service-accounts create <use-case-name> \
  --project=viral-seq-ai \
  --display-name="<Human-readable name>" \
  --description="Used by <workflow-file>.yml to invoke Claude on Vertex AI for <purpose>"

2. Grant minimum roles

Vertex invocation requires both:

Read the full file on GitHub · 221 lines

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. 13d ago First seen · 221 lines · 0 tokens per session scan A b72d42405125

Subscribe to this mod's changes

claude-on-vertex-ci is a skill published in the GitHub repository broadinstitute/viral-ngs (197 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,305 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.