supply-chain-security-sbom-slsa

supply-chain-security-sbom-slsa is a skill for Claude Code, Codex from hamzabellouch/agent-skills. It costs 59 tokens per session (2,341 once invoked), scanned B, original, MIT.

A guide to securing the software supply chain, meaning the code, packages, build outputs, and container images used to ship software. It covers software bills of materials, build provenance, cryptographic signing, and deployment verification.

In plain words
What is it for?
Use it to generate and check SBOMs, create SLSA provenance, sign artifacts with Cosign or Sigstore, use short-lived build identities, and enforce admission checks in Kubernetes.
Why use it?
It helps teams verify where artifacts came from, whether they were changed, and whether their dependencies meet security requirements before deployment.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to generate and check SBOMs, create SLSA provenance, sign artifacts with Cosign or Sigstore, use short-lived build identities, and enforce admission checks in Kubernetes.

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Install with agentmods
npx agentmods add skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add hamzabellouch/agent-skills --skill supply-chain-security-sbom-slsa
Clone the repo
git clone --depth 1 https://github.com/hamzabellouch/agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for supply-chain-security-sbom-slsa

README.md
[![agentmods](https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa/github.svg)](https://agentmods.dev/skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa)
Your own site
<a href="https://agentmods.dev/skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for supply-chain-security-sbom-slsa

Your own site · 80×15
<a href="https://agentmods.dev/skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa"><img src="https://agentmods.dev/badge/skills/hamzabellouch/agent-skills/supply-chain-security-sbom-slsa.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,341 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00059 $0.02341
Opus 5 $0.00030 $0.01171
Sonnet 5 $0.00012 $0.00468
Haiku 4.5 $0.00006 $0.00234

Measured 8d ago against content hash edc3620ec909, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

supply-chain-security-sbom-slsa scanned grade B with 3 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Downloads and executes remote codemediumSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

run: curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b /usr/local/bin

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

run: curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s -- -b /usr/local/bin

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

result = subprocess.run(cmd, capture_output=True, text=True, check=True)
DevSecOps and Supply Chain Security/supply-chain-security-sbom-slsa/SKILL.md · 256 lines

How it starts

The opening of the file, as written. The whole thing — 256 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Supply Chain Security: SBOM, SLSA, & Artifact Attestation

Overview

This skill provides production-ready patterns, automation templates, and Zero-Trust validation gates for securing software supply chains. It establishes end-to-end provenance verification, artifact integrity signing using Sigstore/Cosign, and automated SBOM analysis against vulnerability intelligence feeds.


1. Core Architectural Principles & Zero-Trust Governance

  1. Explicit Provenance Verification: Never trust unverified build outputs. Every container image, binary, and package must present verifiable SLSA Level 3+ provenance signed by ephemeral OIDC tokens.
  2. Deterministic & Reproducible Builds: Strive for hermetic build execution environments where identical source inputs yield bit-for-bit identical outputs.
  3. Continuous Cryptographic Verification: Validate signatures, SBOM attestations, and vulnerability thresholds at admission control (Kubernetes Policy Engine / Kyverno / Gatekeeper) and before deployment.
  4. Least Privilege Build Identities: Build pipelines must operate with short-lived, identity-bound tokens (e.g., GitHub OIDC federated to cloud IAM) rather than static, long-lived credentials.

2. Pipeline Gates & Policy Enforcement

Gate Phase Tooling Enforcement Rules
Source / Pre-Build Git Commit Signing, Dependency-Check Block unverified commits; block dependencies with known critical CVEs without approved exception annotations.
Build Time SLSA Generator, Syft, Cosign Generate SPDX/CycloneDX SBOM; produce in-toto provenance attestation; sign artifacts via Keyless Sigstore.
Post-Build Validation Grype, Trivy, Cosign Verify Block image pushing/deployment if unverified signatures exist or high/critical vulnerabilities violate SLA.
Deploy / Admission Kyverno / Policy Controller Enforce image signature verification, SLSA provenance check, and minimum required SBOM attestation.

Read the full file on GitHub · 256 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 256 lines · 59 tokens per session scan B edc3620ec909

Subscribe to this mod's changes

supply-chain-security-sbom-slsa is a skill published in the GitHub repository hamzabellouch/agent-skills (4 stars, last pushed 1mo ago), licensed MIT. It adds 59 tokens to every session and 2,341 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 3 findings (downloads and executes remote code, makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.