apm: Skill for Claude Code

.agents/skills/supply-chain-security/SKILL.md

supply-chain-security is a skill for Claude Code, Codex from microsoft/apm. It costs 54 tokens per session (326 once invoked), scanned A, original, MIT.

A security review guide for code that resolves dependencies, downloads packages, checks signatures or integrity, handles credentials, or deletes integrated files. Supply-chain security protects software from tampered or malicious dependencies.

In plain words
What is it for?
Use it when changing dependency resolvers, lockfiles, downloaders, authentication code, cleanup logic, file-writing paths, or remote-content handling.
Why use it?
It helps prevent dependency confusion, typosquatting, unsafe file deletion, and accidental exposure of access tokens.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is microsoft/apm's own configuration. It tells Claude Code and Codex how to work on apm itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything apm configures →

About the project

APM is a package manager for AI-agent configuration, using a manifest to declare reusable instructions, skills, prompts, agents, hooks, plugins, and MCP components. Development teams use it to reproduce agent setups across projects and control their dependencies through policies and lockfiles, while the catalogue contains many of these agent components.

microsoft/apm · 4,133 stars · on GitHub · microsoft.github.io

Reuse

Borrowing it

Nothing to install: this file belongs to microsoft/apm. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/microsoft/apm/main/.agents/skills/supply-chain-security/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/microsoft/apm

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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/microsoft/apm/supply-chain-security"><img src="https://agentmods.dev/badge/skills/microsoft/apm/supply-chain-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 326 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00054 $0.00326
Opus 5.5 $0.00022 $0.00130
Sonnet 5.5 $0.00011 $0.00065
Haiku 4.5 $0.00005 $0.00033

Measured 1mo ago against content hash 55ef10cd0f6b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

supply-chain-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 1mo 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.

.agents/skills/supply-chain-security/SKILL.md · 37 lines

What it actually says

Supply Chain Security Skill

Supply chain security expert persona

When to activate

  • Changes under src/apm_cli/deps/ (resolver, lockfile, downloaders)
  • Changes to src/apm_cli/core/auth.py or token_manager.py
  • Changes to src/apm_cli/integration/cleanup.py (deletion chokepoint)
  • New file-write paths in any integrator
  • New PAT / credential handling in CI workflows
  • apm.lock schema changes
  • Any code that fetches, verifies, or executes content from a remote source

Key rules

  • All path construction routes through src/apm_cli/utils/path_security.py (no ad-hoc ".." in x).
  • All deletions of deployed files route through integration/cleanup.py:remove_stale_deployed_files() (3 safety gates).
  • All credential reads route through AuthResolver -- never raw os.getenv for token vars.
  • Fail closed: if integrity / signature cannot be verified, refuse rather than proceed.
  • Token values must never appear in user-facing strings.
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. 1mo ago First seen · 37 lines · 54 tokens per session scan A 55ef10cd0f6b

Subscribe to this mod's changes

supply-chain-security is a skill published in the GitHub repository microsoft/apm (4,133 stars, last pushed yesterday), licensed MIT. It adds 54 tokens to every session and 326 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-08-30.

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