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Coverage Analysis

Checked
trailofbits·vlatest·testing·CC-BY-SA-4.0

Identifies untested code paths and potential vulnerabilities within software projects using advanced static analysis techniques.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add trailofbits/skills --skill coverage-analysis -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

trailofbits

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned trailofbits/skills at 82fe822625.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
82fe822625
Manifest
plugins/testing-handbook-skills/skills/coverage-analysis/SKILL.md
Scanned
2 files, 548 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill performs code coverage analysis, identifying which lines of code are executed during testing. It helps developers understand test effectiveness and pinpoint areas needing more comprehensive tests. The tool provides detailed reports highlighting uncovered sections within a codebase.

When to use it

  • Evaluating Test Suites: Determine if your existing test suite adequately covers the application's functionality.
  • Identifying Gaps in Testing: Find lines of code that are not being exercised by any tests, indicating potential areas for new tests.
  • Refactoring and Code Changes: After significant refactoring or adding new features, ensure adequate test coverage is maintained.
  • Improving Test Quality: Use the insights to improve existing tests and create more robust testing strategies.

Key capabilities

  • Code Coverage Reporting
  • Detailed Line-by-Line Analysis
  • Integration with Testing Frameworks (implied)

Example prompts

  • "Analyze code coverage for my project's src/ directory."
  • "Show me the lines of code in utils.py that are not covered by tests."
  • "Generate a report detailing test coverage for all Python files."

Tips & gotchas

The skill likely requires access to your codebase and testing environment, so ensure proper permissions are granted. The interpretation of coverage results should be combined with other quality metrics and developer judgment.