CLAUDE.md examples from real projects

MicrosoftCLAUDE.md

mxc

microsoft/mxc/CLAUDE.md

For code review, follow .github/skills/mxc-code-review/SKILL.md.

No other project uses it yet

Google CloudReads credentialsCLAUDE.md

professional-services / agent-eval

GoogleCloudPlatform/professional-services/tools/agent-eval/CLAUDE.md

This file provides context for Claude Code. It is loaded automatically when you run claude from a project that uses agent-eval. agent-eval is an evaluation CLI for ADK agents. It acts as the glue between OpenTelemetry traces from ADK, Vertex AI Evaluation for LLM-as-judge metrics, and Gemini for analysis. The evaluation cycle: 1. Generate — Generate agent traces via agent-eval generate (using --mode simulate for UserSim multi-turn or --mode live for DIY single-turn; aliases simulate and interact are supported). 2.…

GoogleCLAUDE.md

osv.dev

google/osv.dev/CLAUDE.md

see AGENTS.md

MicrosoftCLAUDE.md

playwright-dotnet

microsoft/playwright-dotnet/CLAUDE.md

Follow .github/workflows/tests.yml for the canonical sequence. Tests take ~8 minutes. Always save output to a file and grep from there: The tests are NUnit tests in src/Playwright.Tests/, one class per upstream spec file: PageRouteTests.cs ports tests/page/page-route.spec.ts. Locator and assertion classes are in Locator/ and Assertions/. A regression test is one added case in the class that owns the feature, also when only the port has the bug.

No other project uses it yet

AnthropicCLAUDE.md

commerce-agents

anthropics/commerce-agents/CLAUDE.md

For agents working in this repo, commerce-builder plugin users included. The public reference for commerce agents on Claude: a shopping agent and a merchant agent on three paths each, four vertical examples, and a Claude Code plugin. requirements.txt installs the seven packages and their pinned dependencies (requirements-dev.txt adds pytest and ruff); scripts/install.sh runs it. No real company, brand, product, or person appears: the only company is ACME and its lines; every brand, prompt, schema, and figure is invented here. Two…

Hugging FaceCLAUDE.md

OpenEnv

huggingface/OpenEnv/CLAUDE.md

Guidance for Claude Code when working with this repository. OpenEnv uses Claude Code as the primary development tool. We follow a two-phase model: Skills and agents are auto-discovered when you run Claude Code in this repo: Verify with /agents or ask "what skills are available?" OpenEnv supports two development modes: When working in the main repository clone, direct edits are allowed: - Quick exploration and prototyping - Small fixes that don't need TDD workflow - Documentation updates TDD is activated…

MicrosoftCLAUDE.md

clarity

microsoft/clarity/CLAUDE.md

Clarity is an open-source TypeScript behavioral analytics library for tracking user interactions and session replays. Monorepo with Lerna/Yarn workspaces: Stack: TypeScript, Rollup, TSLint, Playwright, Lerna, Yarn workspaces Critical: clarity-js has two top priorities that must guide all development decisions: Rollup + TypeScript → multiple formats (CJS, ESM, IIFE minified). Build artifacts auto-cleaned to build/ or extension/ (gitignored). Build outputs per package: - clarity-js: clarity.js (CJS), clarity.module.js (ESM), clarity.min.js (minified), plus variants: clarity.extended.js, clarity.insight.js, clarity.performance.js, clarity.livechat.js, and dynamic module builds (clarity.tidio.js,…

AnthropicCLAUDE.md

claude-agent-sdk-demos / agent

anthropics/claude-agent-sdk-demos/email-agent/agent/CLAUDE.MD

Use this agent when: - User asks to find specific emails or types of emails - Complex multi-criteria email searches are needed - Need to discover emails through progressive refinement…

No other project uses it yet

AnthropicCLAUDE.md

claude-agent-sdk-demos / email-agent

anthropics/claude-agent-sdk-demos/email-agent/CLAUDE.md

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

No other project uses it yet

AnthropicCLAUDE.md

claude-agent-sdk-demos / agent

anthropics/claude-agent-sdk-demos/excel-demo/agent/CLAUDE.MD

You are a specialized Excel Agent designed to help users work with spreadsheets. Your primary purpose is to assist with Excel-related tasks using the xlsx-skill. You have access to the…

No other project uses it yet

AnthropicCLAUDE.md

claude-agent-sdk-demos / simple-chatapp

anthropics/claude-agent-sdk-demos/simple-chatapp/CLAUDE.md

A minimal chat application demonstrating the Claude Agent SDK. This starts both: - Backend server on http://localhost:3001 - Vite dev server on http://localhost:5173 Visit http://localhost:5173 Client -> Server: - {…

No other project uses it yet

StripeCLAUDE.md

stripe-go

stripe/stripe-go/.claude/CLAUDE.md

Note: this SDK uses a flat package layout. Most resource files (e.g. customer.go, invoice.go) are at the repo root alongside the core code. It's ok not to put comments in a function if their addition wouldn't meaningfully clarify anything.

VercelCLAUDE.md

ai-elements

vercel/ai-elements/.claude/CLAUDE.md

This project uses Ultracite, a zero-config preset that enforces strict code quality standards through automated formatting and linting. Oxlint + Oxfmt (the underlying engine) provides robust linting and formatting. Most…

GoogleCLAUDE.md

XNNPACK

google/XNNPACK/CLAUDE.md

See AGENTS.md for full project architecture, code generation workflows, pull request requirements, and coding conventions.

No other project uses it yet

MicrosoftCLAUDE.md

Microsoft365DSC

microsoft/Microsoft365DSC/CLAUDE.md

The repository coding and comment rules live in AGENTS.md. Read that file first. Rules scoped to a path, including the contract for the files under Examples/, live in .github/instructions/. IMPORTANT: This project has a knowledge graph. ALWAYS use the code-review-graph MCP tools BEFORE using Grep/Glob/Read to explore the codebase. The graph is faster, cheaper (fewer tokens), and gives you structural context (callers, dependents, test coverage) that file scanning cannot. Fall back to Grep/Glob/Read only when the graph doesn't cover what…

MetaReads credentialsCLAUDE.md

fairchem

facebookresearch/fairchem/CLAUDE.md

IMPORTANT: You MUST run pre-commit run --files /path/to/modified_file.py on every file you modify, before considering the task complete. No exceptions. Every file must start with: Line length: 88 characters. Linter:…

No other project uses it yet

AnthropicDeletes or force-pushesCLAUDE.md

cwc-workshops / agent-battle

anthropics/cwc-workshops/agent-battle/CLAUDE.md

You're helping a participant in a 45-minute hands-on workshop about Claude Managed Agents. They're competing to configure an agent (in my_agent.py) that mines the most diamonds in Minecraft. The point is for them to learn how CMA's levers work — system prompt, skills, MCP servers, model choice — not just to win. - When asked "how do I get more diamonds," explain the levers (what does SKILLS=[SKILL_MINING] do? what's the trade-off vs writing your own prompt?) rather than handing over…

AnthropicReads credentialsCLAUDE.md

cwc-workshops / agent-decomposition

anthropics/cwc-workshops/agent-decomposition/.claude/CLAUDE.md

You're pairing with someone who's here to learn the tool → skill → subagent decision framework by decomposing an inventory agent. They'll ask you to make edits. Make them — but treat every edit as a teaching moment. 1. Explain before you edit. One short paragraph: what's wrong with the current state, what the change does, and which framework principle it maps to (compute-over-context / typed-contract / policy-as-skill / scope). 2. Show, don't just tell. Ground the lesson in something…

AnthropicReads credentialsCLAUDE.md

cwc-workshops / eval-driven-agent-development

anthropics/cwc-workshops/eval-driven-agent-development/CLAUDE.md

When asked to setup the folder/repository, make sure the prerequisites listed in the README.md are met (Node >=22 installed, ant CLI installed, Docker installed, ANTHROPIC_API_KEY set in environment). Do not deploy the resources yet. Offer to install them for the user if missing (if Docker is missing, point them to the installation website) Kick off docker build -t cwc-pptx-render . asap in a subagent to make sure the docker image is pre-built. Write the ANTHROPIC_API_KEY from your environment into a…

AnthropicCLAUDE.md

cwc-workshops / ship-your-first-managed-agent

anthropics/cwc-workshops/ship-your-first-managed-agent/CLAUDE.md

This directory is a workshop. The person you are working with is here to learn Claude Managed Agents. You write everything; they paste one prompt per part and then talk to the agent you built. Work one part at a time. People type these in their own words. Match the intent, not the wording: One part per request, then stop. Do not start the next part, even if you can see its stubs and it looks easy. Leave the later…