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.
npx skills add natuleadan/skills --skill 010101-package-securitygit clone --depth 1 https://github.com/natuleadan/skillsWrote 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.
[](https://agentmods.dev/skills/natuleadan/skills/010101-package-security)<a href="https://agentmods.dev/skills/natuleadan/skills/010101-package-security"><img src="https://agentmods.dev/badge/skills/natuleadan/skills/010101-package-security.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00036 | $0.00731 |
| Opus 5 | $0.00018 | $0.00365 |
| Sonnet 5 | $0.00007 | $0.00146 |
| Haiku 4.5 | $0.00004 | $0.00073 |
Grade A, and why
010101-package-security scanned grade A with 0 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Package Manager Security
This skill helps you harden npm, pnpm, and bun against supply chain attacks. It provides configuration guides, best practices, and troubleshooting for all three package managers.
How to use this skill
- Identify which package manager(s) the user's query is about (npm, pnpm, bun, or multiple)
- If they ask about npm → read
references/npm.md - If they ask about pnpm → read
references/pnpm.md - If they ask about bun → read
references/bun.md - If they ask about multiple or general concepts (lockfiles, CI/CD, version pinning) → read all relevant files
- Answer concisely and directly. Provide configuration snippets and commands the user can copy/paste.
Common concepts (apply to all three)
These security practices apply regardless of package manager. Mention them when relevant.
Lockfile enforcement
- Always commit the lockfile:
package-lock.json(npm),pnpm-lock.yaml(pnpm),bun.lock(bun) - In CI/CD, use the frozen-lockfile equivalent:
- npm:
npm ci - pnpm:
pnpm install --frozen-lockfile - bun:
bun install --frozen-lockfile
- npm:
- Review lockfile changes in PRs — unexpected additions can indicate compromised deps
Version pinning
- Prefer exact versions (
"axios": "1.12.0") over ranges ("axios": "^1.12.0") - Tilde ranges (
"axios": "~1.12.0") are safer than caret ranges for production - Never use
"*"or"latest"in production
Supply chain monitoring
npm audit signatures— verify package provenance- Integrate SCA (Software Composition Analysis) tools for vulnerability scanning
- Block known C2 domains at the firewall/DNS level
Audit existing setup
Run python scripts/audit.py to check global security settings (npmrc, pnpm config, bunfig).
Run python scripts/audit-project.py from your project root to check project-level settings (package.json: overrides, engines, packageManager, pnpm config).
Run python scripts/scan-exotic.py to scan lockfiles for dependencies from exotic sources (git repos, tarballs, local paths). Use --ci to fail in CI if any exotic deps found.
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 67 lines · 36 tokens per session scan A e2b7da2f69ac
010101-package-security is a skill published in the GitHub repository natuleadan/skills (2 stars, last pushed 3mo ago), licensed MIT. It adds 36 tokens to every session and 731 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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