agent-owasp-check

agent-owasp-check is a skill for Claude Code, Codex from drvoss/everything-copilot-cli. It costs 43 tokens per session (3,684 once invoked), scanned A, original, MIT.

A security audit for AI agent systems based on the OWASP Agentic Security Initiative Top 10. It examines the agent pipeline, including tool access, prompts, memory, and operational safeguards.

In plain words
What is it for?
It is for reviewing repositories with agent, MCP, or large-language-model behavior and checking boundaries around prompts, tools, memory, logs, and external data fetching.
Why use it?
It helps you find weaknesses specific to AI systems before deploying an assistant, tool layer, or multi-agent workflow.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/drvoss/everything-copilot-cli/agent-owasp-check
Any agent
npx skills add drvoss/everything-copilot-cli --skill agent-owasp-check
Clone the repo
git clone --depth 1 https://github.com/drvoss/everything-copilot-cli

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 agent-owasp-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/drvoss/everything-copilot-cli/agent-owasp-check.svg)](https://agentmods.dev/skills/drvoss/everything-copilot-cli/agent-owasp-check)
Your own site
<a href="https://agentmods.dev/skills/drvoss/everything-copilot-cli/agent-owasp-check"><img src="https://agentmods.dev/badge/skills/drvoss/everything-copilot-cli/agent-owasp-check.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,684 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00043 $0.03684
Opus 5 $0.00022 $0.01842
Sonnet 5 $0.00009 $0.00737
Haiku 4.5 $0.00004 $0.00368

Measured today against content hash a1f1f8486da1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agent-owasp-check 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 today.

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.

skills/security/agent-owasp-check/SKILL.md · 317 lines

How it starts

The opening of the file, as written. The whole thing — 317 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent OWASP Check

Audit an AI agent system against the OWASP Agentic Security Initiative (ASI) Top 10. Use this when you need a focused agent-security workflow rather than a broad repository scorecard.

When to Use

  • Reviewing a repository that exposes agent, MCP, or LLM execution paths
  • Before deploying a new multi-agent workflow or tool-using assistant
  • When onboarding a new MCP server, tool layer, or prompt orchestration pattern
  • During a security review of an AI-powered product feature

When NOT to Use

Instead of agent-owasp-check Use
General repository security scoring evaluate-repository
Ordinary web-app auth or injection review security-scan or pr-security-review
Prompt-quality regression testing eval-harness

Prerequisites

  • The repository actually contains agent, MCP, or LLM behavior to inspect
  • You can search source, config, and workflow files
  • You know which runtime boundaries matter: prompts, tools, memory, logs, or external fetches

Workflow

1. Confirm the agent surface exists

git ls-files | Where-Object { $_ -match 'agent|llm|mcp|openai|anthropic|claude|langchain|gpt|gemini|codex|vertex|bedrock|ollama|litellm' }

If nothing relevant is present, stop and use a broader repository audit instead.

2. Check each ASI risk

ASI-01: Unbounded Resource Consumption
git --no-pager grep -n "maxTokens\|max_tokens\|timeout\|rate_limit\|maxRetries" -- "*.ts" "*.js" "*.py" "*.json"

Pass: Agent runs have explicit limits for time, retries, tokens, or tool calls.
Fail: The agent can loop or consume resources without a clear bound.

ASI-02: Privilege Escalation
git --no-pager grep -n "allowedTools\|toolWhitelist\|allowlist\|permissions" -- "*.ts" "*.js" "*.py" "*.json"

Pass: Tool access is scoped to the task or role.
Fail: The agent can invoke any available tool or cross trust boundaries freely.

Read the full file on GitHub · 317 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. today First seen · 317 lines · 43 tokens per session scan A a1f1f8486da1

Subscribe to this mod's changes

agent-owasp-check is a skill published in the GitHub repository drvoss/everything-copilot-cli (45 stars, last pushed 8d ago), licensed MIT. It adds 43 tokens to every session and 3,684 once invoked, about $0.0002 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.

Related

Other skills, from other repositories

winui-design

Use when designing, reviewing, or fixing WinUI 3: sample and control discovery with winapp find-ui, layout planning, control choice, Fluent Design alignment, Light/Dark/High Contrast theming, typography, spacing, brushes, accessibility, and XAML data-binding design. Load before authoring new XAML, reviewing UI PRs…

microsoft/win-dev-skills · 119 tokens

winui-dev-workflow

Build and run workflow for WinUI 3 apps with WinApp CLI 0.6+ — project creation with winapp new, project-mode winapp run, BuildAndRun.ps1 analyzer integration, crash diagnosis, and prerequisites. Use when creating, building, running, or fixing build errors in a WinUI 3 project.

microsoft/win-dev-skills · 73 tokens

winui-packaging

MSIX packaging, code signing, and distribution for WinUI 3 apps — build for release, certificate generation (winapp cert generate), certificate trust, code signing (winapp sign), self-contained deployment, CI/CD with GitHub Actions, and Microsoft Store submission. Use when preparing for release, creating MSIX…

microsoft/win-dev-skills · 86 tokens

winui-session-report

Analyze the current or a recent agent session (GitHub Copilot CLI or Claude Code) and generate a diagnostic report. Use only when the user explicitly asks for session feedback, agent debugging, or a review of what happened during a build session. Do not inspect session data automatically.

microsoft/win-dev-skills · 61 tokens

microsoft-build

Your companion for Microsoft Build 2026. Helps you find sessions relevant to your project, discover what's new for your tech stack, scaffold projects from sessions, and plan your event schedule. Activate when users mention sessions, schedule, what's new, Build, Ignite, AI Tour, Microsoft event, conference, or…

microsoft/Build-CLI · 109 tokens

journey-template

Create new agentic journeys from app ideas. Generates README.md (learner walkthrough), PLAN.md (AI-readable spec), and app-specific skills for OSS deployments. Supports any stack (Node.js, Python, .NET, Java, Swift, Kotlin) and Azure service (Container Apps, AKS, Functions, App Service). USE FOR: new journey, scaffold…

DanWahlin/github-azure-agentic-journeys · 153 tokens