skillpm: Instructions file for GitHub Copilot

.github/copilot-instructions.md

skillpm copilot-instructions.md is an instructions file for GitHub Copilot from sbroenne/skillpm. It costs 1,540 tokens per session, scanned A, original, MIT.

Instructions for skillpm, an npm-like tool for installing and managing skills for coding agents. They explain skill dependencies, installed-skill scanning, and linking skills into agent folders.

In plain words
What is it for?
For developing or maintaining skillpm, including its TypeScript code, package handling, and agent-skill linking.
Why use it?
They give contributors the project’s rules and existing tools to use, reducing the risk of duplicating functionality or wiring packages incorrectly.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file. Also seen: mentions Codex; mentions Gemini CLI.

This is sbroenne/skillpm's own configuration. It tells GitHub Copilot how to work on skillpm 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 skillpm configures →

Reuse

Borrowing it

Nothing to install: this file belongs to sbroenne/skillpm. 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/sbroenne/skillpm/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/sbroenne/skillpm

Made for: GitHub Copilot.

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.

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/sbroenne/skillpm/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/sbroenne/skillpm/copilot-instructions/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/sbroenne/skillpm/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/sbroenne/skillpm/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,540 This file is loaded in full into every session.
When invoked 1,540 The same file — it is already loaded in full.
Security scan A 0 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 $0.01540 $0.01540
Opus 5.5 $0.00616 $0.00616
Sonnet 5.5 $0.00308 $0.00308
Haiku 4.5 $0.00154 $0.00154

Measured 1mo ago against content hash 9445ff9d6285, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skillpm copilot-instructions.md 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.

.github/copilot-instructions.md · 155 lines

How it starts

The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copilot Instructions for skillpm

What is skillpm?

skillpm is npm for Agent Skills. It builds on top of npm to add skill-awareness: resolving skill dependency trees, scanning for installed skills, and wiring them into agent directories.

Design principle: stay as close to npm as possible. skillpm should feel like npm. Same package.json, same node_modules, same package-lock.json, same registry. skillpm only adds what npm cannot do by itself: discovering installed skills and linking them into agent directories.

skillpm only manages npm-hosted skills. For broader project-level agent packaging or non-npm sources, point users to APM or to the underlying host-specific tools.

The project is developed in TypeScript.

Key dependencies (don't reimplement — use these)

Package Type What it does How skillpm uses it
npm CLI (shell out) Package management, dependency resolution, registry, lockfiles, caching All package operations — skillpm install calls npm install under the hood
skills CLI (shell out) Installs canonical skill copies and agent links npx [email protected] add <path> -y --json — checks structured project-install results
Official skills-ref Python CLI (shell out) Validates SKILL.md against the Agent Skills spec skills-ref validate <path> from PATH during skillpm publish; not the third-party npm port

Before writing any new code, check whether one of these tools already does it.

Requires Node.js 22.20.0 or later. Keep the upstream CLI version pinned in src/utils/exec.ts and recheck its JSON contract before upgrading. Publishing also requires Python 3.11+ and the official validator on PATH.

What are Agent Skills?

Agent Skills are modular, reusable packages of instructions, scripts, and resources that AI agents can dynamically load to extend their capabilities. They follow an open standard adopted by Claude, Codex, Cursor, Gemini CLI, Augment, and others.

Read the full file on GitHub · 155 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. 1mo ago Changed · +16 lines · +244 tokens per session 9445ff9d6285
  2. 2mo ago First seen · 139 lines · 1,296 tokens per session scan A 5504a731a7af

Subscribe to this mod's changes

skillpm copilot-instructions.md is an instructions file published in the GitHub repository sbroenne/skillpm (14 stars, last pushed yesterday), licensed MIT. It adds 1,540 tokens to every session, about $0.0062 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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