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Keyless artifact signing with Sigstore and Cosign v1.0.0

Use this resource to sign and verify container images or artifacts

New

  • 352 downloads
  • 109 likes
  • 231 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install container-signing-cosign

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent installs Cosign, signs an image keylessly from your CI's OIDC identity (GitHub Actions), then verifies the signature and adds attestations. You get a signing chain your deployment can verify.

Mostly picked by

Updated November 2, 2026

Card for the “Keyless artifact signing with Sigstore and Cosign” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: Cosign installation, keyless image signing and verification
  • SKILL.md: OIDC integration in GitHub Actions, policy enforcement and SLSA attestations

Good fit for

  • You want to prove your images come from your CI
  • You must provide SLSA provenance or a signed SBOM

Not for

    Tags

    • cosign
    • sigstore
    • signing
    • supply chain

    About

    You say

    “Sign my service image from GitHub Actions without managing a private key.”

    Card for the “Keyless artifact signing with Sigstore and Cosign” skill

    Skill published by claude-dev-suite under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to sign and verify container images or artifacts
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • SKILL.md13.9 KB

    Origin and licence

    Listed unmodified

    Author
    claude-dev-suite
    Source
    github.com/claude-dev-suite/claude-dev-suite/tree/e10ab644ba43abe2abc923399226df4af7337214/skills/security/sigstore-cosign
    Licence
    MIT

    Notice

    « sigstore-cosign » (claude-dev-suite, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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