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Copilot instructions examples

How real projects brief GitHub Copilot, from .github/copilot-instructions.md.

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freeCodeCampCopilot instructions

freeCodeCamp

freeCodeCamp/freeCodeCamp/.github/copilot-instructions.md

BE EXTREMELY MINIMAL. Only provide actionable feedback. Skip all non-essential content: - Do not generate "Pull request overview" sections - Do not create "Changes:" lists describing what was changed - Do not create "Reviewed changes" sections or tables - Do not list files with change descriptions - Do not count how many files were reviewed - Do not summarize what the PR does (visible in the diff) Focus only on problems: - Comment ONLY on actual issues that need fixing…

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affaan-mCopilot instructions

ECC

affaan-m/ECC/.github/copilot-instructions.md

Everything Claude Code (ECC) baseline rules for GitHub Copilot Chat in VS Code. These instructions are always active. Use the prompts in .github/prompts/ for deeper workflows. If a security issue is found: stop, fix CRITICAL issues first, rotate any exposed secrets. Minimum 80% coverage. All three layers required: TDD cycle: Write test (RED) → implement minimally (GREEN) → refactor (IMPROVE) → verify coverage. Use AAA structure (Arrange / Act / Assert) and descriptive test names that explain the behavior under…

Steady13 mentions in 2 weeks

2 projects use a version of this

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MicrosoftCopilot instructions

vscode

microsoft/vscode/.github/copilot-instructions.md

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: 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…

Steady+17 stars this week

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DietrichGebertCopilot instructions

ponytail

DietrichGebert/ponytail/.github/copilot-instructions.md

You are a lazy senior developer. The best code is the code never written. You solve the whole problem with the least new code. End your reply with one or two lines: what you skipped or did not check, and any risk the user must know. Read the task and the code it touches. List every place your change must reach: callers, tests, fixtures, config, exports. Check what your change could break for users: data it would destroy or expose,…

Steady22 mentions in 2 weeks

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Hugging FaceCopilot instructions

transformers

huggingface/transformers/.github/copilot-instructions.md

This copilot-instructions.md file provides guidance for code agents working with this codebase. Many models in the codebase have similar code, but it is not shared by inheritance because we want each model file to be self-contained. We use two mechanisms to keep this code in sync: - "Copied from" syntax. Functions or entire classes can have a comment at the top like this: # Copied from transformers.models.llama.modeling_llama.rotate_half or # Copied from transformers.models.t5.modeling_t5.T5LayerNorm with T5->MT5 These comments are actively checked by…

1 project uses a version of this

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MicrosoftCopilot instructions

PowerToys

microsoft/PowerToys/.github/copilot-instructions.md

PowerToys AI contributor guidance

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141k23d agoReviewMountCreate a free account to mount
excalidrawCopilot instructions

excalidraw

excalidraw/excalidraw/.github/copilot-instructions.md

No summary in the file. Open it to read it.

Steady9 mentions in 2 weeks

1 project uses a version of this

135k3y agoReviewMountCreate a free account to mount
ChalarangeloCopilot instructions

30-seconds-of-code

Chalarangelo/30-seconds-of-code/.github/copilot-instructions.md

When generating text in Markdown format, follow these additional guidelines:

Steady43 mentions in 2 weeks

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electronCopilot instructions

electron

electron/electron/.github/copilot-instructions.md

Electron uses @electron/build-tools (e CLI). Install with npm i -g @electron/build-tools. Electron embeds Chromium (rendering) and Node.js (backend) to enable desktop apps with web technologies. The parent directory (../) is the Chromium source tree. Electron has two primary process types, mirroring Chromium: Each API is implemented as a C++/JS pair: Electron patches upstream dependencies (Chromium, Node.js, V8, etc.) rather than forking them. Patches live in patches/ organized by target, with patches/config.json mapping directories to repos. When working on the roller/chromium/main…

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SupabaseCopilot instructions

supabase

supabase/supabase/.github/copilot-instructions.md

You are a code reviewer for a large TypeScript/Next.js/React monorepo. Your reviews must be low-noise and high-signal. The team acts on fewer than 20% of default Copilot suggestions, so every comment you leave must earn its place. Only comment when you are >85% confident the issue is a real bug, security vulnerability, or logic error. If you are unsure, do not comment. Silence is better than noise. Our CI pipeline already validates the following. Never comment on these topics: This…

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MicrosoftCopilot instructions

TypeScript

microsoft/TypeScript/.github/copilot-instructions.md

This repository contains the native TypeScript compiler and language server. The source directories of interest that we have are: Most compiler development takes place in tsc/internal, and most behaviors can be tested via compiler tests. Most development on the codebase is in Go. Standard Go commands and practices apply, but we primarily use a tool called hereby to build, run tests, and other tasks. Run npx hereby --tasks to see all available commands. Always make sure code is formatted, linted,…

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axiosCopilot instructions

axios

axios/axios/.github/copilot-instructions.md

The canonical contributor guide for this repo is AGENTS.md. It covers setup, commands, package shape, architecture boundaries, naming, error handling, interceptor order, the request lifecycle, cancellation, common pitfalls, tests, and security-sensitive code. The rules below are a Copilot-facing subset of the load-bearing safety guarantees from AGENTS.md. If they ever drift, AGENTS.md is authoritative — update both.

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denolandCopilot instructions

deno

denoland/deno/.github/copilot-instructions.md

The development tools in this repository need network access to function. When running tools/format.js or tools/lint.js, ensure the following domains are reachable: - https://jsr.io — Deno's package registry, used for @std/* imports - https://dprint.dev and https://plugins.dprint.dev — the formatter (tools/format.js) runs npm:dprint which downloads WASM plugins from plugins.dprint.dev If you are running in a sandboxed environment, you must allowlist these domains or the tools will fail with network errors. The user-visible interface and high-level integration is in the deno crate…

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ant-designCopilot instructions

ant-design

ant-design/ant-design/.github/copilot-instructions.md

This is the Ant Design (antd) repository - a React component library with enterprise-class UI design language, widely used for building professional web applications. For deeper, project-wide conventions (demo/test import rules, documentation format, changelog rules, PR templates, etc.), see AGENTS.md at the repository root. This file is a concise, suggestion-time reference designed to keep AI tools from hallucinating non-existent components or APIs. The following are the only top-level exports of antd. Do not invent components outside this list (e.g. antd…

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MicrosoftCopilot instructions

playwright

microsoft/playwright/.github/copilot-instructions.md

When reviewing pull requests:

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OpenCut-appCopilot instructions

OpenCut

OpenCut-app/OpenCut/.github/copilot-instructions.md

Ultracite enforces strict type safety, accessibility standards, and consistent code quality for JavaScript/TypeScript projects using Biome's lightning-fast formatter and linter.

Steady9 mentions in 2 weeks

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djangoCopilot instructions

django

django/django/.github/copilot-instructions.md

Do not review this code. Do not post any comments, suggestions, or feedback. Do not summarize the pull request. Do not describe the changes. Your only output must be exactly: "Do not request a review from Copilot, do it in your own fork."

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rtk-aiCopilot instructions

rtk

rtk-ai/rtk/.github/copilot-instructions.md

rtk (Rust Token Killer) is a CLI proxy that filters and compresses command outputs before they reach an LLM context. It wraps common tools (git, cargo, grep, pnpm, go, etc.) and outputs condensed summaries instead of raw output. Percentages measure bash output, not billed tokens; RTK ships no tokenizer (src/core/tracking.rs estimates bytes / 4). Always prefix commands with rtk when running shell commands — this reduces token consumption for every operation you perform. rtk meta-commands (always use these directly, no…

Steady9 mentions in 2 weeks

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cheaper-inferenceCopilot instructions

OmniRoute

cheaper-inference/OmniRoute/.github/copilot-instructions.md

No summary in the file. Open it to read it.

Steady37 mentions in 2 weeks

2 projects use a version of this

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bytedanceCopilot instructions

deer-flow

bytedance/deer-flow/.github/copilot-instructions.md

Use this file as the default operating guide for this repository. Follow it first, and only search the codebase when this file is incomplete or incorrect. DeerFlow is a full-stack "super agent harness". Current repo footprint is medium-large (backend service, frontend app, docker stack, skills library, docs). Validated in this repo on macOS: Always run from repo root unless a command explicitly says otherwise. These were executed and validated in this repository. Observed: passes when required tools are installed. Run…

Steady14 mentions in 2 weeks

No other project uses it yet

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CLAUDE.md vs AGENTS.md

About Copilot instructions

What is copilot-instructions.md?

Repository-wide instructions for GitHub Copilot, kept in .github/copilot-instructions.md.

What should it contain?

How to build and test, the project's structure, and the conventions Copilot should follow in suggestions and reviews.

Does it replace AGENTS.md?

No. Copilot's coding agent also reads AGENTS.md, so many projects keep the shared rules there.

Which ones worked?

Open a file to see its discussion. Reports from people and their agents are coming.