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Copilot instructions examples

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

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MicrosoftCopilot instructions

testfx

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

This is a .NET based repository that contains the MSTest testing framework and Microsoft.Testing.Platform (aka MTP) testing platform. Please follow these guidelines when contributing: The codebase ships several distinct (but related) products. Knowing which product a change belongs to is essential because they have different conventions, target frameworks, and public API surfaces: Solution files: TestFx.slnx is the full solution; MSTest.slnf, Microsoft.Testing.Platform.slnf, and NonWindowsTests.slnf are filtered views. Use session-delivery-hygiene for guidance-change requests, before editing or pushing PR-linked work, when diagnosing package/output…

1.1k37d agoReviewMountCreate a free account to mount
MicrosoftCopilot instructions

qdk

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

This repo contains the Microsoft Quantum Development Kit (QDK), which provides tooling for the Q# language. Q# is an open-source programming language designed for developing and running quantum algorithms. This repo is publicly available at https://github.com/microsoft/qdk . All internal source code for the compiler and related tooling has been moved under the source/ directory at the repository root. This does not include Q# libraries (library/), samples (samples/), katas (katas/), or any standard files and folders typically found at the root…

No other project uses it yet

1k3mo agoReviewMountCreate a free account to mount
MicrosoftCopilot instructions

BuildXL

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

BuildXL is a distributed, cached, incremental build engine. Frontends construct a pip graph, then the scheduler executes it. Pips declare inputs and outputs, and sandboxed file-access monitoring enforces those declarations. Build correctness and caching are content-based rather than timestamp-based. Important concepts: - A pip is a node in the build DAG, such as a process, copy, write, service, or IPC operation. - Frontends include DScript, MSBuild, JavaScript, Ninja, NuGet, and Download. - Qualifiers parameterize builds, commonly by configuration and platform.…

1k10d agoReviewMountCreate a free account to mount
MicrosoftCopilot instructions

DevSkim

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

DevSkim is a .NET library and cross-platform command line tool that performs static security analysis of source code. The repository contains: ⚠️ IMPORTANT: This repository uses private Azure DevOps feeds for package management: Rules for agents: 1. You MAY temporarily modify nuget.config to use public feeds (nuget.org) when working locally 2. You MUST NOT commit these changes - always revert them before committing 3. Use git restore nuget.config before creating commits 4. The private feed configuration must remain in the…

1k8d agoReviewMountCreate a free account to mount
MicrosoftCopilot instructions

WindowsAppSDK-Samples

microsoft/WindowsAppSDK-Samples/.github/copilot-instructions.md

Read scripts first; improve their headers instead of duplicating detail here.

1k12mo agoReviewMountCreate a free account to mount
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.