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implementing-image-provenance-verification-with-cosign

65 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a security skill usually runs scanners and checks websites.

By mukul975/Anthropic-Cybersecurity-Skills (GitHub) · security · 35,906 stars · scanned at commit 54a7988

Signs and verifies container image provenance with Sigstore Cosign, covering key-based and keyless OIDC signing (Fulcio, Rekor transparency log), SLSA attestations, and enforcing signature verification through Kubernetes admission control. Use when signing images for supply chain security, setting up keyless OIDC signing, attaching attestations, or enforcing a verified-images-only policy at admission. Keywords: Cosign, Sigstore, Fulcio, Rekor, keyless, attestation, cosign verify, admission poli…

Works with any agent that supports SKILL.md skills.

What this skill can do

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Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'implementing-image-provenance-verification-with-cosign' ] || [ -L ~/.agents/skills/'implementing-image-provenance-verification-with-cosign' ]; then echo 'A skill folder named implementing-image-provenance-verification-with-cosign already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/mukul975/Anthropic-Cybersecurity-Skills' "$d" && git -C "$d" checkout --quiet '54a798831d2266a3ca61ce68a7acb80b81160d57' -- 'skills/implementing-image-provenance-verification-with-cosign' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/implementing-image-provenance-verification-with-cosign' ~/.agents/skills/'implementing-image-provenance-verification-with-cosign' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'implementing-image-provenance-verification-with-cosign' ~/.claude/skills/'implementing-image-provenance-verification-with-cosign' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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