security-supply-chain

security-supply-chain is a skill for Claude Code from contactandrewchl-wq/turtle-mcp. It costs 57 tokens per session (1,139 once invoked), scanned B, original, MIT.

A set of rules and checks for keeping software dependencies and build tools safe. It covers lockfiles, dependency audits, software bills of materials, signatures, and repeatable builds.

In plain words
What is it for?
Use it when adding or updating dependencies, setting up CI/CD, or designing a release process. It helps audit packages, verify downloads, and enforce safer dependency versions.
Why use it?
A compromised or fake dependency can run code during builds, tests, or production. These checks help detect known vulnerabilities and reduce unsafe installation practices.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the turtle plugin — 26 skills shipped together

Good fit Use it when adding or updating dependencies, setting up CI/CD, or designing a release process. It helps audit packages, verify downloads, and enforce safer dependency versions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/contactandrewchl-wq/turtle-mcp/security-supply-chain
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 contactandrewchl-wq/turtle-mcp --skill security-supply-chain
Clone the repo
git clone --depth 1 https://github.com/contactandrewchl-wq/turtle-mcp

Made for: Claude Code.

Or install turtle, the plugin that ships this one along with the rest of its 26 skills.

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 security-supply-chain

README.md
[![agentmods](https://agentmods.dev/badge/skills/contactandrewchl-wq/turtle-mcp/security-supply-chain/github.svg)](https://agentmods.dev/skills/contactandrewchl-wq/turtle-mcp/security-supply-chain)
Your own site
<a href="https://agentmods.dev/skills/contactandrewchl-wq/turtle-mcp/security-supply-chain"><img src="https://agentmods.dev/badge/skills/contactandrewchl-wq/turtle-mcp/security-supply-chain/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 security-supply-chain

Your own site · 80×15
<a href="https://agentmods.dev/skills/contactandrewchl-wq/turtle-mcp/security-supply-chain"><img src="https://agentmods.dev/badge/skills/contactandrewchl-wq/turtle-mcp/security-supply-chain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,139 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 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 $0.00057 $0.01139
Opus 5 $0.00028 $0.00570
Sonnet 5 $0.00011 $0.00228
Haiku 4.5 $0.00006 $0.00114

Measured 11d ago against content hash addf89920051, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade B, and why

security-supply-chain scanned grade B with 2 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 11d 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.

- **Sin descargas `curl | sh`** sin checksum / firma verificada.

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.

- **Sin descargas `curl | sh`** sin checksum / firma verificada.
skills/security-supply-chain/SKILL.md · 115 lines

How it starts

The opening of the file, as written. The whole thing — 115 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Supply chain security

Cuándo usar

  • Agregar o actualizar una dependencia.
  • Configurar CI/CD o un pipeline de publicación.
  • Diseñar el proceso de release.

Por qué importa

Una dependencia comprometida ejecuta código en tu build, en tus tests y en producción. Históricos: event-stream, colors.js/faker.js, xz-utils (CVE-2024-3094), typosquatting masivo en npm/PyPI.

Reglas duras

  • Lockfile commiteado siempre. package-lock.json, Cargo.lock, poetry.lock, pnpm-lock.yaml, go.sum.
  • Sin instalar latest en runtime. Pinneá versiones; actualizá con PR.
  • Sin npm install sin lockfile en CI. Usá npm ci, pnpm install --frozen-lockfile, cargo install --locked.
  • Sin scripts postinstall de paquetes no auditados en entornos sensibles. npm install --ignore-scripts cuando se pueda.
  • Sin descargas curl | sh sin checksum / firma verificada.

Auditoría continua

  • npm audit / pnpm audit / yarn audit
  • cargo audit (Rust)
  • pip-audit (Python)
  • osv-scanner (multi-ecosistema, base OSV)
  • govulncheck (Go)
  • bundler-audit (Ruby)

Corré en CI y bloqueá merges con vulnerabilidades altas/críticas sin justificación.

SBOM

Generá un Software Bill of Materials por release:

  • syft / cyclonedx para generación.
  • Formato: CycloneDX o SPDX (estándar).
  • Almacenalo junto al artefacto en el release.

Si te llaman por un CVE de una dep, tener SBOM = saber qué releases están afectados en minutos, no días.

Firmas y verificación

  • Verificá firmas de artefactos descargados: GPG, sigstore/cosign, Apple notarization.
  • Firmá tus releases: cosign sign para imágenes y binarios.
  • Para SLSA L3+: build reproducible + provenance attestation.

Dependencias — antes de agregar una

Checklist rápido:

  • ¿La necesitamos o lo hace el lenguaje/runtime?
  • ¿Está mantenida? (último commit, issues abiertos, downloads).
  • ¿Cuántas deps trae transitivamente? Más = más superficie.
  • ¿Tiene licencia compatible con la nuestra?
  • ¿Hay versión LTS o solo 0.0.x?
  • ¿La organización detrás es identificable?
  • ¿Hay alternativa ya en uso en el repo?

Read the full file on GitHub · 115 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. 11d ago First seen · 115 lines · 57 tokens per session scan B addf89920051

Subscribe to this mod's changes

security-supply-chain is a skill published in the GitHub repository contactandrewchl-wq/turtle-mcp (2 stars, last pushed 2mo ago), licensed MIT. It adds 57 tokens to every session and 1,139 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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