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Trail of Bits Agentic Actions Auditor

Find prompt injection risks in GitHub Actions that run Claude or other AI agents.

Official vendorby Trail of BitsChecked October 18, 2026

A Trail of Bits skill for a new class of risk: AI coding agents running in CI. It audits workflows that call agents such as Claude Code Action and finds paths where attacker-controlled text can reach them.

Who it is for

  • Security engineers
  • DevOps engineers
  • Open source maintainers

Prompts to try

Once the skill is installed, ask for the result in plain words. Claude picks the skill up on its own.

Prompt 1
Audit our GitHub workflows that use Claude Code Action
Prompt 2
Can an outside contributor prompt-inject our CI agent?
Prompt 3
Review this repo's AI-powered actions for security problems

How to install it

In Claude Code

  1. /plugin marketplace add trailofbits/skills
  2. /plugin install agentic-actions-auditor@trailofbits

In Claude.ai

Not practical in Claude.ai because the skill drives local command-line tools, so use Claude Code.

Good to know

Can also audit workflows from a GitHub URL.

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How we checked it

Confirmed SKILL.md at plugins/agentic-actions-auditor/skills/agentic-actions-auditor/SKILL.md in trailofbits/skills via the GitHub API; skill folder last changed 2026-09-16, repo has 7,620 stars and was pushed 2026-10-15.

Source: github.com/trailofbits/skills/tree/main/plugins/agentic-actions-auditor/skills/agentic-actions-auditor