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 kumaran-is/claude-code-onboarding --skill claude-actions-auditorgit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWrote 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/kumaran-is/claude-code-onboarding/claude-actions-auditor)<a href="https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/claude-actions-auditor"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/claude-actions-auditor/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/kumaran-is/claude-code-onboarding/claude-actions-auditor"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/claude-actions-auditor.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00104 | $0.03495 |
| Opus 5 | $0.00052 | $0.01747 |
| Sonnet 5 | $0.00021 | $0.00699 |
| Haiku 4.5 | $0.00010 | $0.00349 |
Grade A, and why
claude-actions-auditor 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 301 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Iron Law
NO FINDINGS REPORT WITHOUT READING EVERY WORKFLOW FILE — never report "clean" based on filename or trigger alone; the env var intermediary (Vector A) is invisible without tracing data flow through the full YAML
Claude Actions Auditor
Static security analysis for GitHub Actions workflows that invoke anthropics/claude-code-action. Discovers workflow files, identifies Claude Code Action steps, captures security-relevant configuration, and detects 9 attack vectors where attacker-controlled input reaches Claude running in CI/CD.
When to Use
- Auditing a repository's GitHub Actions workflows that use
anthropics/claude-code-action - Before adding Claude Code Action to any workflow
- Reviewing whether attacker-controlled GitHub event data can reach Claude's prompt
- Evaluating Claude Code Action configuration (sandbox settings, tool permissions, user allowlists)
- Assessing trigger events that expose workflows to external input (
pull_request_target,issue_comment, etc.) - Investigating data flow from GitHub event context through
env:blocks to Claude's prompt field
When NOT to Use
- Analyzing workflows that do NOT use
anthropics/claude-code-action - Performing runtime prompt injection testing (this is static analysis only, not exploitation)
- Auditing non-GitHub CI/CD systems (Jenkins, GitLab CI, CircleCI)
- Auto-fixing or modifying workflow files (this skill reports findings, does not modify files)
Rationalizations to Reject
When auditing Claude Code Action workflows, reject these common rationalizations. Each represents a reasoning shortcut that leads to missed findings.
1. "It only runs on PRs from maintainers"
Wrong because it ignores pull_request_target, issue_comment, and other trigger events that expose actions to external input. Attackers do not need write access to trigger these workflows. A pull_request_target event runs in the context of the base branch, not the PR branch, meaning any external contributor can trigger it by opening a PR.
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.
- 7d ago First seen · 301 lines · 104 tokens per session scan A 71f7d87de478
claude-actions-auditor is a skill published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 104 tokens to every session and 3,495 once invoked, about $0.0005 per session on Opus 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 2026-09-03.
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