Code Coverage with gcov

What Code Coverage with gcov is

Code Coverage with gcov is a skill published in the gadievron/raptor repository on GitHub, which has about 3.8k stars. The repository describes itself as: “Raptor turns Claude Code into a general-purpose AI offensive/defensive security agent. By using Claude.md and creating rules, sub-agents, and skills, and orchestrating security tool usage, we configure the agent for adversarial thinking, and perform research or attack/defense operations.”

A skill is a folder with a SKILL.md file: frontmatter with a name and a description, followed by instructions Claude follows. Claude loads a skill automatically when a task matches its description, and you can also run it directly with a slash and its name.

Skills work in Claude Code and in Claude Cowork, which makes Code Coverage with gcov a portable way to give Claude the same method everywhere.

How to install Code Coverage with gcov

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

The repository does not declare an open-source license, so we list only the outline of the file here. Read the full text on GitHub.

• What is RAPTOR?
• How it's built
• Prerequisites
• Quick Start
• Option 1: Install manually
• Option 2: Run in a container (recommended)
• What to expect on a first run
• Security model
• What RAPTOR can do
• How the pipeline works
• Software Composition Analysis
• Z3 SMT integration
• Running offline and in air-gapped pipelines
• Custom rules

Open README.md on GitHub

Before you install

• Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
• Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
• Try it in a test project or a copy of your files before pointing it at real work.
• Pin the version you tested, and review changes before updating.
• Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ