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verifying-sigstore-signatures

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Verify Sigstore trust before deployment

Software Engineering#provenance#supply-chain#slsa#cosign#attestation#sigstore#rekor
Authorrocklambros
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This Skill helps you determine whether a software artifact can be trusted by validating its Sigstore signature, provenance, and declared policy before release or deployment.

Core Features & Use Cases

  • Identity Verification: Confirms the signer identity and OIDC issuer match the allowed trust policy.
  • Signature and Attestation Checks: Validates cosign signatures, Rekor inclusion, and optional in-toto SLSA provenance attestations.
  • Provenance Assessment: Maps verified build metadata to an appropriate SLSA Build level and flags insufficient trust.
  • Use Case: Use it when a container image, wheel, npm package, or generic blob must be approved for production, audited for supply-chain compliance, or blocked because the provenance is incomplete or mismatched.

Quick Start

Ask the skill to verify a digest-pinned artifact against your trust policy and return the per-check verdict plus the final deploy decision.

Dependency Matrix

Required Modules

None required

Components

references

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: verifying-sigstore-signatures
Download link: https://github.com/rocklambros/rcs/archive/main.zip#verifying-sigstore-signatures

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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