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    dagsec

    1

    dagsec: stop agents installing hallucinated or vulnerable packages

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    dagsec

    dagsec

    Example session with this skill installed

    I need to add a library for handling JWTs in this Node.js project. Can you find and install a good one?

    • Read your context and instructions
    • Compiled the dagsec

    Summary: I picked jsonwebtoken, the most widely used JWT library for Node.js, and checked it with dagsec before installing. The version I first had in mind, 8.5.1, has known high-severity vulnerabilities, so I installed the current safe version instead.

    What dagsec checked

    PackageVersiondagsec resultAction
    jsonwebtoken8.5.1DO NOT USE: high-severity advisories (CVE-2022-23539, CVE-2022-23540, CVE-2022-23541), fixed in 9.0.0Skipped
    jsonwebtoken9.0.2OK: actively maintained, no known vulnerabilitiesInstalled

    What I ran

    npm install jsonwebtoken@9.0.2

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    About this skill

    Website: dagsec.net · Docs · Source

    Coding agents install packages from memory: names that don't exist (hallucinated or typosquatted) and versions with known critical vulnerabilities. dagsec checks every npm, PyPI, crates.io, Go, Maven and NuGet package against live data before it's installed.

    This skill teaches your agent to use dagsec. The protection itself, blocking risky installs before they run, comes from the free official dagsec plugin. Install it from the source so you always get the current version.

    Install in Claude Code

    1. Create a free API key at app.dagsec.net/keys
    2. Run:
    /plugin marketplace add hasanerman/dagsec-claude
 /plugin install dagsec@dagsec

    Cursor, Windsurf, GitHub Copilot

    Connect them in one click with the dagsec desktop app.

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    How to use

    Skills on Agensi run inside your AI agent. Copy the prompt, paste it into your agent, and it connects to Agensi and installs this skill for you. If a payment is needed, your agent shows it to you first.

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