Copilot-Skills: Instructions file for GitHub Copilot

.github/instructions/skill-template.instructions.md

Copilot-Skills skill-template.instructions.md is an instructions file for GitHub Copilot from TheSethRose/Copilot-Skills. It costs 1,272 tokens per session, scanned A, original, MIT.

Instructions for creating reusable coding-agent skills. A skill combines a prompt that explains when to use it, automatically loaded instructions, and a folder containing supporting files.

In plain words
What is it for?
Use them when creating a new skill, choosing its activation rules, organizing supporting scripts or references, or applying a reusable skill template.
Why use it?
They provide a defined structure so skills can be found, combined, revealed in stages, and run consistently.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is TheSethRose/Copilot-Skills's own configuration. It tells GitHub Copilot how to work on Copilot-Skills 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 Copilot-Skills configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is bash .github/copilot-skills/skill-template/scripts/helper.sh "argument".

Reuse

Borrowing it

Nothing to install: this file belongs to TheSethRose/Copilot-Skills. 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/TheSethRose/Copilot-Skills/main/.github/instructions/skill-template.instructions.md
Clone the repo
git clone --depth 1 https://github.com/TheSethRose/Copilot-Skills

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.

agentmods badge for Copilot-Skills skill-template.instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/thesethrose/copilot-skills/skill-template/github.svg)](https://agentmods.dev/instructions/thesethrose/copilot-skills/skill-template)
Your own site
<a href="https://agentmods.dev/instructions/thesethrose/copilot-skills/skill-template"><img src="https://agentmods.dev/badge/instructions/thesethrose/copilot-skills/skill-template/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 Copilot-Skills skill-template.instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/thesethrose/copilot-skills/skill-template"><img src="https://agentmods.dev/badge/instructions/thesethrose/copilot-skills/skill-template.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,272 This file is loaded in full into every session.
When invoked 1,272 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 $0.01272 $0.01272
Opus 5.5 $0.00509 $0.00509
Sonnet 5.5 $0.00254 $0.00254
Haiku 4.5 $0.00127 $0.00127

Measured 1mo ago against content hash efc3a2f04041, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Copilot-Skills skill-template.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/instructions/skill-template.instructions.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Template - Automatic Context Instructions

Related Prompt: /skill-template
Related Skill: .github/copilot-skills/skill-template/

Triggers: create skill, new skill, skill template, skill architecture, skill structure, skill patterns

Context: Skill Creation and Architecture

When working with skill-related files or when user queries contain skill creation keywords, this context is automatically activated.

Core Principles

Three-Part System

  • Prompt File - Defines WHEN and HOW to use skill (.github/prompts/)
  • Instructions File - Auto-loaded context rules (.github/instructions/)
  • Skill Directory - Bundled scripts and detail files (.github/copilot-skills/)

Five Constitutional Principles

  • Progressive Disclosure - Load core first, details on demand
  • File-Based Organization - Skills are discoverable files
  • Dynamic Discovery - Index enables AI to find skills
  • Deterministic Execution - Scripts produce consistent output
  • Composability - Skills reference each other clearly

Default Behaviors

When user mentions "create skill" or "new skill"

  1. Suggest /skill-template skill prompt
  2. Guide through template copying process
  3. Validate structure follows constitutional principles
  4. Help register in keyword routing map

When user mentions "skill architecture" or "skill patterns"

  1. Suggest /skill-template skill prompt
  2. Load .github/copilot-skills/skill-template/README.md for overview
  3. Reference existing skills as examples (git-ops, pdf-handling)

When user asks about "bundled scripts" or "script templates"

  1. Suggest /skill-template skill prompt
  2. Show example scripts in .github/copilot-skills/skill-template/scripts/
  3. Reference script templates in .github/copilot-skills/templates/

Quality Guidelines

✅ Do

  • Use templates from .github/copilot-skills/templates/
  • Follow three-part system (prompt + instructions + directory)
  • Validate against five constitutional principles
  • Register new skills in keyword routing map (.github/copilot-instructions.md)
  • Use progressive disclosure (load on-demand, not all at once)
  • Make scripts deterministic (terminal output only)
  • Document trigger keywords in instructions file
  • Cross-reference related skills

Read the full file on GitHub · 163 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 First seen · 163 lines · 1,272 tokens per session scan A efc3a2f04041

Subscribe to this mod's changes

Copilot-Skills skill-template.instructions.md is an instructions file published in the GitHub repository TheSethRose/Copilot-Skills (3 stars, last pushed 10mo ago), licensed MIT. It adds 1,272 tokens to every session, about $0.0051 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 2026-08-31.

Related

Other instructions, from other repositories

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,581 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,731 tokens

deno copilot-instructions.md

Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.

denoland/deno · 3,077 tokens