vscode: Instructions file for GitHub Copilot

.github/copilot-instructions.md

vscode copilot-instructions.md is an instructions file for GitHub Copilot from microsoft/vscode. It costs 2,731 tokens per session, scanned A, original, MIT.

Project and architecture notes for VS Code and its Copilot features, including the main source folders, built-in extensions, workbench, and testing areas.

In plain words
What is it for?
Use it when changing VS Code or Copilot code and you need guidance on source folders, architecture, extensions, or tests.
Why use it?
It gives coding agents a map of the repository so they can locate the right layer and understand how the application is organized.

Instructions file for GitHub Copilot ✓ vendor

Written for GitHub Copilot: a Copilot instructions file.

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

About the project

Visual Studio Code is a code editor that supports editing, navigating, understanding, debugging, and extending software projects. Developers use it for the edit-build-debug cycle, and the catalogue add-ons provide skills, instructions, and agents for working within the editor.

microsoft/vscode · 193,657 stars · on GitHub · code.visualstudio.com

Reuse

Borrowing it

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

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
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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/microsoft/vscode/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/microsoft/vscode/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,731 This file is loaded in full into every session.
When invoked 2,731 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 $0.02731 $0.02731
Opus 5.5 $0.01092 $0.01092
Sonnet 5.5 $0.00546 $0.00546
Haiku 4.5 $0.00273 $0.00273

Measured 3d ago against content hash 9206bebcb36f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

vscode 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 3d 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 · 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.

VS Code Copilot Instructions

Project Overview

Visual Studio Code is built with a layered architecture using TypeScript, web APIs and Electron, combining web technologies with native app capabilities. The codebase is organized into key architectural layers:

Root Folders

  • src/: Main TypeScript source code with unit tests in src/vs/*/test/ folders
  • build/: Build scripts and CI/CD tools
  • extensions/: Built-in extensions that ship with VS Code
  • test/: Integration tests and test infrastructure
  • scripts/: Development and build scripts
  • resources/: Static resources (icons, themes, etc.)
  • out/: Compiled JavaScript output (generated during build)

Core Architecture (src/ folder)

  • src/vs/base/ - Foundation utilities and cross-platform abstractions
  • src/vs/platform/ - Platform services and dependency injection infrastructure
  • src/vs/editor/ - Text editor implementation with language services, syntax highlighting, and editing features
  • src/vs/workbench/ - Main application workbench for web and desktop
    • workbench/browser/ - Core workbench UI components (parts, layout, actions)
    • workbench/services/ - Service implementations
    • workbench/contrib/ - Feature contributions (git, debug, search, terminal, etc.)
    • workbench/api/ - Extension host and VS Code API implementation
  • src/vs/code/ - Electron main process specific implementation
  • src/vs/server/ - Server specific implementation
  • src/vs/sessions/ - Agent sessions window, a dedicated workbench layer for agentic workflows (sits alongside vs/workbench, may import from it but not vice versa)

The core architecture follows these principles:

  • Layered architecture - from base, platform, editor, to workbench
  • Dependency injection - Services are injected through constructor parameters
    • If non-service parameters are needed, they need to come before the service parameters
  • Contribution model - Features contribute to registries and extension points
  • Cross-platform compatibility - Abstractions separate platform-specific code

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. 3d ago Changed · +4 lines · +51 tokens per session 9206bebcb36f
  2. 9d ago Changed · +2 lines · +186 tokens per session 09664beeba53
  3. 1mo ago First seen · 157 lines · 2,494 tokens per session scan A d711289b5eff

Subscribe to this mod's changes

vscode copilot-instructions.md is an instructions file published in the GitHub repository microsoft/vscode (193,657 stars, last pushed today), licensed MIT. It adds 2,731 tokens to every session, about $0.0109 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.