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CLAUDE.md examples from real projects

How real projects brief Claude Code: the commands, conventions and warnings they put in CLAUDE.md.

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MicrosoftCLAUDE.md

SqlScriptDOM

microsoft/SqlScriptDOM/CLAUDE.md

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

2847mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

finnts

microsoft/finnts/CLAUDE.md

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

28242d agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Sico / frontend

microsoft/Sico/frontend/CLAUDE.md

The canonical Sico frontend lives in frontend/ inside the Sico monorepo. It is a pnpm + Turborepo workspace for the application and shared frontend packages. React 19 + TypeScript 5.9, Vite 6 + SWC, Tailwind v4, tsgo + oxlint + ESLint + oxfmt, Vitest + RTL + Playwright, Storybook 9, @tanstack/react-router, jotai + immer, react-query + axios, zod, react-error-boundary. Dependency chain: @sico/app → @sico/shared → @sico/ui → @sico/config. pnpm install → pnpm dev / pnpm lint / pnpm test (turbo-orchestrated…

2535mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Sico / app

microsoft/Sico/frontend/packages/app/CLAUDE.md

Sico frontend application — TanStack Router file-based routing, Jotai state, react-query + axios data layer, zod validation. npm run dev / build / preview / lint / test / test:build / e2e (Playwright builds first). Depends on: @sico/ui, @sico/shared, @sico/config (dev) · Depended on by: none (leaf).

2535mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Sico / config

microsoft/Sico/frontend/packages/config/CLAUDE.md

Shared engineering configuration. Contains no runtime code and has no scripts — consumed by other packages only. Do not modify these config files casually. They are the single source of truth for engineering standards — every change ripples to every consumer. If a package needs different behavior, override at the consumer instead of editing the base: Depends on: none (zero deps) · Depended on by: @sico/ui, @sico/shared, @sico/app.

2535mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Sico / shared

microsoft/Sico/frontend/packages/shared/CLAUDE.md

Cross-app code that's not pure UI — hooks, atoms, services, schemas, composer components, and full feature implementations. DWP (superset app) consumes features from here directly. npm run dev (Storybook :6007) / lint / test / build-storybook. Depends on: @sico/config (dev), @sico/ui · Depended on by: @sico/app.

2535mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Sico / ui

microsoft/Sico/frontend/packages/ui/CLAUDE.md

Design tokens + Atomic components for SICO. React 19 + Tailwind CSS v4 + shadcn/ui restyles. npm run dev (Storybook :6006) / lint / test / build-storybook. Each component is a 4-file unit: Development is driven by skills. Always invoke the relevant skill before writing code. Depends on: @sico/config (dev) · Depended on by: @sico/shared, @sico/app.

2535mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

AutoSaddler / autosaddler

microsoft/AutoSaddler/src/autosaddler/v1/proposer/autosaddler/CLAUDE.md

A harness is the agent codebase that wraps an LLM to solve benchmark tasks — it includes the system prompt, tool definitions (docstrings), tool implementations, agent loop logic, and hook configurations. The harness determines how the LLM perceives tools, plans actions, and handles edge cases. A candidate is a specific version of this harness codebase, stored as an isolated git worktree. This pipeline iteratively optimizes a harness to improve its performance on a target benchmark. Each iteration evaluates a candidate…

2313mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

P.808

microsoft/P.808/CLAUDE.md

Before making any changes to this repository, read and follow the coding standards in .github/copilot-instructions.md. This repository defines reusable agent runbooks in .github/agents/. When a user asks to create a study, run a test, or set up a subjective quality experiment, follow the instructions in the relevant agent file. When triggered, read the full agent file and execute its workflow step by step.

2315mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

rust-guidelines

microsoft/rust-guidelines/CLAUDE.md

This repository contains the Pragmatic Rust Guidelines - a collection of design guidelines for Rust developers, published as an mdBook at https://microsoft.github.io/rust-guidelines. Requires mdbook to be installed. Each guideline has a unique identifier in the form M-FOO-BAR and resides in its own markdown file M-FOO-BAR.md within the src/guidelines/ directory. Guidelines follow this structure: Guidelines should be beneficial for safety/COGs/maintenance, agreeable to experienced Rust developers, and comprehensible to novices. Titles should follow the style of the Rust API Guidelines, such as:

2225mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Agents-for-python

microsoft/Agents-for-python/CLAUDE.md

This is the Microsoft 365 Agents SDK for Python, a framework for building enterprise-grade conversational agents for M365, Teams, Copilot Studio, and other platforms. The SDK replaces the legacy Bot Framework SDK (botbuilder packages) with a modern, modular architecture. Important: Python imports use underscores (microsoft_agents), not dots (microsoft.agents). Quick setup (Linux/macOS): Quick setup (Windows): Manual setup (from repository root): Python version: Requires Python 3.10+, supports 3.10-3.14. Recommended: Python 3.11+ The SDK follows a layered, modular architecture with clear separation of…

2174mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

playwright.dev

microsoft/playwright.dev/CLAUDE.md

Semantic commit messages: label(scope): description Labels: fix, feat, chore, docs, test, devops Never add Co-Authored-By agents in commit message. Branch naming for issue fixes: fix-<issue-number>

1968mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

Agents-for-net

microsoft/Agents-for-net/CLAUDE.md

See .github/copilot-instructions.md for build commands, architecture, conventions, and coding guidelines for this repository.

18337d agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

fabric-cli / context

microsoft/fabric-cli/.ai-assets/context/CLAUDE.md

Context for Claude Code helping users work with the Fabric CLI. Copy or symlink to CLAUDE.md or .claude/CLAUDE.md. Fabric CLI (fab) is a command-line tool for Microsoft Fabric with interactive (REPL) and command-line modes. Filesystem-like hierarchy with dot entity suffixes: Switch: fab config set mode interactive or fab config set mode cli Dot-prefixed, not shown by default. Use ls -a to view. Config files in ~/.config/fab/: - cache.bin - encrypted token cache - config.json - CLI settings - auth.json -…

17628d agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

simplechat

microsoft/simplechat/CLAUDE.md

SimpleChat is a Flask web application using Azure Cosmos DB, Azure AI Search, and Azure OpenAI. It supports personal, group, and public workspaces for document management and AI-powered chat. Every…

1575mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

vscode-copilotstudio

microsoft/vscode-copilotstudio/CLAUDE.md

Shared AI-agent guidance for this repository lives in AGENTS.md. Claude Code users and agents should follow AGENTS.md.

1155mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

thinkingbox

microsoft/thinkingbox/Claude.md

A test case includes: - definition of a task for an agent to complete - test code to verify that the task was completed successfully Test cases are part of a ThinkingBox dataset, they are distinct from unit tests. This section only applies to test cases. You'll see tests like this: There are several parts to this test: Good tests should test meaningful side effects from running the test case. They should allow the model to be flexible in how…

1076mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

agentic-agile-template / claude

microsoft/agentic-agile-template/platform-adapters/agent-tools/claude/CLAUDE.md

This is an agent context file. It provides AI coding agents (GitHub Copilot, Claude, Cursor, or any LLM-based development tool) with the information they need to work effectively in your repository. Think of it as onboarding documentation, but optimized for agents: structured, explicit, and maintained alongside your code. WHY DOES IT MATTER? Without an agent context file, every agent session starts from zero. The agent must infer your conventions, guess your architecture, and hope its assumptions match yours. With a…

985mo agoReviewMountCreate a free account to mount
MicrosoftCLAUDE.md

scope

microsoft/scope/CLAUDE.md

Keep this file as a loader only. Never add instructions here; put them in AGENTS.md.

786mo agoReviewMountCreate a free account to mount
CLAUDE.md vs AGENTS.md

About CLAUDE.md

What is CLAUDE.md?

A file Claude Code reads at the start of every session. It holds the commands, conventions and warnings the agent needs for this project.

Where does it go?

At the repository root. Claude Code also reads CLAUDE.md files in subdirectories when it works there.

What should it contain?

Build and test commands, the project's layout, conventions that aren't obvious from the code, and mistakes to avoid. Short files tend to work better than long ones.

CLAUDE.md or AGENTS.md?

Claude Code reads CLAUDE.md; most other agents read AGENTS.md. Many projects keep one and point the other at it.