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Agent skill

Detecting Supply Chain Attacks In CI CD

by mukul975 in mukul975/Anthropic-Cybersecurity-Skills

Scans GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack vectors including unpinned actions, script injection via expressions, dependency confusion, and secrets…

Apache-2.0Auto-check passedDevOps & Cloud

Install Detecting Supply Chain Attacks In CI CD

skills CLI
$ npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-supply-chain-attacks-in-ci-cd -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mukul975/Anthropic-Cybersecurity-Skills detecting-supply-chain-attacks-in-ci-cd --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mukul975/Anthropic-Cybersecurity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/detecting-supply-chain-attacks-in-ci-cd .claude/skills/detecting-supply-chain-attacks-in-ci-cd && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
detecting-supply-chain-attacks-in-ci-cd
GitHub stars
34k
Token cost
~655 tokens
SKILL.md length
147 words
Files
4 (incl. scripts, references)
Skills in repo
644
Repo updated
First seen
Licence
Apache-2.0

At a glance

Scans GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack vectors including unpinned actions, script injection via expressions, dependency confusion, and secrets…

  • Works in 5 steps: Unpinned GitHub Actions (using @main… → Script injection via ${{ github.event }}… → Overly permissive GITHUB_TOKEN permissions → …
  • Hardening CI/CD pipelines
  • SKILL.md covers When to Use, Prerequisites, Instructions and Examples
  • Runs Python scripts from its folder; needs GITHUB_TOKEN

What it does

Detecting Supply Chain Attacks In CI CD is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Scans GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack vectors including unpinned actions, script injection via expressions, dependency confusion, and secrets exposure. Uses PyGithub and YAML parsing for automated audit. Use when hardening CI/CD pipelines or investigating compromised build systems.

Its SKILL.md is about 660 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/api-reference.md` and `scripts/agent.py`).

It sits in DevOps & Cloud, covering Supply chain security and CI/CD. It works with GitHub Actions. The repository describes itself as: 817 structured cybersecurity skills for AI agents · Mapped to 6 frameworks: MITRE ATT&CK, NIST CSF 2.0, MITRE ATLAS, D3FEND, NIST AI RMF & MITRE F3 (Fight Fraud) · agentskills.io…. The licence is Apache-2.0.

When your agent uses it

  • Hardening CI/CD pipelines
  • Investigating compromised build systems

Example prompts

  • “Use the detecting-supply-chain-attacks-in-ci-cd skill to scan GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack…”
  • “/detecting-supply-chain-attacks-in-ci-cd”

Requirements

  • Python 3
  • A credential in GITHUB_TOKEN

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Unpinned GitHub Actions (using @main instead of SHA)
  2. Script injection via ${{ github.event }} expressions
  3. Overly permissive GITHUB_TOKEN permissions
  4. Third-party actions with write access to repo
  5. Dependency confusion via public/private package name collision

What it can do on your machine

Read from SKILL.md and the folder at commit 54a7988. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • GITHUB_TOKEN

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Detecting Supply Chain Attacks In CI CD loads about 655 tokens when it runs, and up to ~1.1k if it reads all its reference files. Until then it costs about 93 tokens; SKILL.md has 147 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~93
When it runs · the whole SKILL.md, loaded when a task matches
~655
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from mukul975/Anthropic-Cybersecurity-Skills at commit 54a7988, republished under its Apache-2.0 licence (© mukul975). 147 words, ~655 tokens.

Download SKILL.mdSave it as .claude/skills/detecting-supply-chain-attacks-in-ci-cd/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
detecting-supply-chain-attacks-in-ci-cd
description
Scans GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack vectors including unpinned actions, script injection via expressions, dependency confusion, and secrets exposure. Uses PyGithub and YAML parsing for automated audit. Use when hardening CI/CD pipelines or investigating compromised build systems.
domain
cybersecurity
subdomain
security-operations
tags
supply-chain-security, ci-cd-security, github-actions, pipeline-security, dependency-pinning, devsecops
version
1.0
author
mahipal
license
Apache-2.0
atlas_techniques
AML.T0010
nist_ai_rmf
GOVERN-5.2, MAP-1.6, MANAGE-2.2
nist_csf
DE.CM-01, RS.MA-01, GV.OV-01, DE.AE-02
mitre_attack
T1195.002, T1195.001, T1199, T1554

Detecting Supply Chain Attacks in CI/CD

When to Use

  • When investigating security incidents that require detecting supply chain attacks in ci cd
  • When building detection rules or threat hunting queries for this domain
  • When SOC analysts need structured procedures for this analysis type
  • When validating security monitoring coverage for related attack techniques

Prerequisites

  • Familiarity with security operations concepts and tools
  • Access to a test or lab environment for safe execution
  • Python 3.8+ with required dependencies installed
  • Appropriate authorization for any testing activities

Instructions

Scan CI/CD workflow files for supply chain risks by parsing GitHub Actions YAML, checking for unpinned dependencies, script injection vectors, and secrets exposure.

python
import yaml
from pathlib import Path

for wf in Path(".github/workflows").glob("*.yml"):
    with open(wf) as f:
        workflow = yaml.safe_load(f)
    for job_name, job in workflow.get("jobs", {}).items():
        for step in job.get("steps", []):
            uses = step.get("uses", "")
            if uses and "@" in uses and not uses.split("@")[1].startswith("sha"):
                print(f"Unpinned action: {uses} in {wf.name}")

Key supply chain risks:

  1. Unpinned GitHub Actions (using @main instead of SHA)
  2. Script injection via ${{ github.event }} expressions
  3. Overly permissive GITHUB_TOKEN permissions
  4. Third-party actions with write access to repo
  5. Dependency confusion via public/private package name collision

Examples

python
# Check for script injection in run steps
for step in job.get("steps", []):
    run_cmd = step.get("run", "")
    if "${{" in run_cmd and "github.event" in run_cmd:
        print(f"Script injection risk: {run_cmd[:80]}")

© mukul975, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (scripts, references) in skills/detecting-supply-chain-attacks-in-ci-cd of mukul975/Anthropic-Cybersecurity-Skills.

  • SKILL.md
  • LICENSE
  • references/api-reference.md
  • scripts/agent.py

Open the folder on GitHubat commit 54a7988

Compare with similar skills

Detecting Supply Chain Attacks In CI CD next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Detecting Supply Chain Attacks In CI CD compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Detecting Supply Chain Attacks In CI CD this skillmukul975/Anthropic-Cybersecurity-Skills34k—~655Automated safety check: PassApache-2.0
GitHub Actions Supply Chain Pinningasyncapi/generator1.1k—~1.9kAutomated safety check: PassApache-2.0
Vibe CI Supply Chainmistralai/mistral-vibe5.1k—~1kAutomated safety check: PassApache-2.0
CI/CD Pipeline Principlesirahardianto/awesome-agv156—~2.7kAutomated safety check: NotesMIT
Atmos CIcloudposse/atmos1.4k—~4.7kAutomated safety check: PassApache-2.0
Supply Chain Guarddavila7/claude-code-templates33k—~1.7kAutomated safety check: NotesMIT

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Works with

Categories

Questions about Detecting Supply Chain Attacks In CI CD

What does Detecting Supply Chain Attacks In CI CD do?

Scans GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack vectors including unpinned actions, script injection via expressions, dependency confusion, and secrets…. Detecting Supply Chain Attacks In CI CD is an agent skill from mukul975/Anthropic-Cybersecurity-Skills. Scans GitHub Actions workflows and CI/CD pipeline configurations for supply chain attack vectors including unpinned actions, script injection via expressions, dependency confusion, and secrets exposure.

When should I use Detecting Supply Chain Attacks In CI CD?

Detecting Supply Chain Attacks In CI CD fits situations like: hardening CI/CD pipelines; investigating compromised build systems.

How do I install Detecting Supply Chain Attacks In CI CD in Claude Code?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-supply-chain-attacks-in-ci-cd -a claude-code`. Or copy the skill folder (skills/detecting-supply-chain-attacks-in-ci-cd in mukul975/Anthropic-Cybersecurity-Skills) into .claude/skills/detecting-supply-chain-attacks-in-ci-cd in your project. Claude Code loads it when a task matches its description.

How do I install Detecting Supply Chain Attacks In CI CD in Codex?

Run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-supply-chain-attacks-in-ci-cd -a codex`. Or copy the skill folder (skills/detecting-supply-chain-attacks-in-ci-cd in mukul975/Anthropic-Cybersecurity-Skills) into .agents/skills/detecting-supply-chain-attacks-in-ci-cd in your project. Codex loads it when a task matches its description.

Can I use Detecting Supply Chain Attacks In CI CD in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mukul975/Anthropic-Cybersecurity-Skills --skill detecting-supply-chain-attacks-in-ci-cd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/detecting-supply-chain-attacks-in-ci-cd, .gemini/skills/detecting-supply-chain-attacks-in-ci-cd, .github/skills/detecting-supply-chain-attacks-in-ci-cd and .opencode/skills/detecting-supply-chain-attacks-in-ci-cd in your project.

What does Detecting Supply Chain Attacks In CI CD need to run?

Going by SKILL.md and its folder, Detecting Supply Chain Attacks In CI CD needs Python for the scripts in its folder and credentials named GITHUB_TOKEN. Our summary lists: Python 3; A credential in GITHUB_TOKEN.

Does Detecting Supply Chain Attacks In CI CD access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Detecting Supply Chain Attacks In CI CD safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Detecting Supply Chain Attacks In CI CD use?

Detecting Supply Chain Attacks In CI CD is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Detecting Supply Chain Attacks In CI CD use?

About 655 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 410 tokens, read only when the agent opens those files.

What are the alternatives to Detecting Supply Chain Attacks In CI CD?

Skills that share tags, products or a category with Detecting Supply Chain Attacks In CI CD: GitHub Actions Supply Chain Pinning (asyncapi/generator, 1.1k stars), Vibe CI Supply Chain (mistralai/mistral-vibe, 5.1k stars), CI/CD Pipeline Principles (irahardianto/awesome-agv, 156 stars) and Atmos CI (cloudposse/atmos, 1.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Detecting Supply Chain Attacks In CI CD?

mukul975 (a GitHub user) maintains it in mukul975/Anthropic-Cybersecurity-Skills, which has 34,116 GitHub stars. The repository holds 644 skills in this directory. The repository was last updated on August 31, 2026.

Source: mukul975/Anthropic-Cybersecurity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.