defender-for-devops

defender-for-devops is a skill for Claude Code from JosiahSiegel/claude-plugin-marketplace. It costs 172 tokens per session (2,770 once invoked), scanned A, original, MIT.

A guide for adding Microsoft security checks to Azure Pipelines, Microsoft's service for automatically building and releasing software. It covers code, dependency, and container-image scanning tools.

In plain words
What is it for?
Use it when adding Microsoft Security DevOps tasks, SAST checks, dependency scanning, or container scanning to an Azure pipeline.
Why use it?
It helps catch insecure code, libraries, and container images during software delivery instead of discovering those problems later.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the ado-master plugin — 4 skills, 1 agent shipped together

Good fit Use it when adding Microsoft Security DevOps tasks, SAST checks, dependency scanning, or container scanning to an Azure pipeline.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops
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 JosiahSiegel/claude-plugin-marketplace --skill defender-for-devops
Clone the repo
git clone --depth 1 https://github.com/JosiahSiegel/claude-plugin-marketplace

Made for: Claude Code.

Or install ado-master, the plugin that ships this one along with the rest of its 4 skills, 1 agent.

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 defender-for-devops

README.md
[![agentmods](https://agentmods.dev/badge/skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops/github.svg)](https://agentmods.dev/skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops)
Your own site
<a href="https://agentmods.dev/skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops"><img src="https://agentmods.dev/badge/skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops/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 defender-for-devops

Your own site · 80×15
<a href="https://agentmods.dev/skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops"><img src="https://agentmods.dev/badge/skills/josiahsiegel/claude-plugin-marketplace/defender-for-devops.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 172 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,770 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.
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 $0.00172 $0.02770
Opus 5 $0.00086 $0.01385
Sonnet 5 $0.00034 $0.00554
Haiku 4.5 $0.00017 $0.00277

Measured 11d ago against content hash b0bf1a01e26a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

defender-for-devops 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 11d 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.

plugins/ado-master/skills/defender-for-devops/SKILL.md · 461 lines

How it starts

The opening of the file, as written. The whole thing — 461 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🚨 CRITICAL GUIDELINES

Windows File Path Requirements

MANDATORY: Always Use Backslashes on Windows for File Paths

When using Edit or Write tools on Windows, you MUST use backslashes (\) in file paths, NOT forward slashes (/).

Examples:

  • ❌ WRONG: D:/repos/project/file.tsx
  • ✅ CORRECT: D:\repos\project\file.tsx

This applies to:

  • Edit tool file_path parameter
  • Write tool file_path parameter
  • All file operations on Windows systems

Documentation Guidelines

NEVER create new documentation files unless explicitly requested by the user.

  • Priority: Update existing README.md files rather than creating new documentation
  • Repository cleanliness: Keep repository root clean - only README.md unless user requests otherwise
  • Style: Documentation should be concise, direct, and professional - avoid AI-generated tone
  • User preference: Only create additional .md files when user specifically asks for documentation

Microsoft Defender for DevOps Integration

Complete guide to integrating Microsoft Defender for Cloud security scanning into Azure Pipelines.

Overview

Microsoft Security DevOps (MSDO) provides comprehensive security scanning capabilities:

  • SAST: Static Application Security Testing
  • Secret Detection: Identify hardcoded secrets and credentials
  • Dependency Scanning: Vulnerable package detection
  • IaC Scanning: Infrastructure as Code security analysis
  • Container Scanning: Image vulnerability assessment with Trivy

Microsoft Security DevOps Extension

Installation:

  1. Install from Azure DevOps Marketplace
  2. Configure in pipeline YAML
  3. View results in Scans tab
  4. Integrate with Defender for Cloud

Extension Capabilities:

  • Converts results to SARIF format
  • Displays findings in Scans tab
  • Integrates multiple security tools
  • Provides centralized security insights

YAML Integration

Basic MSDO Task

trigger:
  branches:
    include:
      - main
      - develop

pool:
  vmImage: 'ubuntu-24.04'

stages:
  - stage: Build
    jobs:
      - job: BuildAndScan
        steps:
          - task: UseDotNet@2
            displayName: 'Install .NET SDK'
            inputs:
              version: '8.x'

          - task: DotNetCoreCLI@2
            displayName: 'Build Project'
            inputs:
              command: 'build'
              projects: '**/*.csproj'

          # Microsoft Security DevOps Scan
          - task: MicrosoftSecurityDevOps@1
            displayName: 'Run Microsoft Security DevOps'
            inputs:
              categories: 'secrets,code,dependencies,IaC,containers'
              break: false  # Don't fail pipeline on findings

          # Publish SARIF results
          - task: PublishSecurityAnalysisLogs@3
            displayName: 'Publish Security Analysis Logs'
            inputs:
              ArtifactName: 'CodeAnalysisLogs'

          # Display results in Scans tab
          - task: PostAnalysis@2
            displayName: 'Post Analysis'
            inputs:
              break: false

Read the full file on GitHub · 461 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. 11d ago First seen · 461 lines · 172 tokens per session scan A b0bf1a01e26a

Subscribe to this mod's changes

defender-for-devops is a skill published in the GitHub repository JosiahSiegel/claude-plugin-marketplace (54 stars, last pushed 2mo ago), licensed MIT. It adds 172 tokens to every session and 2,770 once invoked, about $0.0009 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 2026-08-30.

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