add quickstart claude agent before A365 extension

nodejs/claude/quickstart-before/.env.template

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+ANTHROPIC_API_KEY=

nodejs/claude/quickstart-before/README.md

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+# Claude Agent SDK + Microsoft 365 Agents SDK Quickstart
+
+A sample integration demonstrating how to build an intelligent agent using the Claude Agent SDK within the Microsoft 365 Agents SDK.
+
+## Overview
+
+This project combines two powerful SDKs:
+- **Claude Agent SDK** - Provides AI agent capabilities powered by Anthropic's Claude models
+- **Microsoft 365 Agents SDK** - Enables deployment and hosting of agents within the Microsoft 365 ecosystem
+
+## Architecture
+
+```
+User Message → M365 Agent SDK → Claude Agent SDK → Claude AI → Response
+```
+
+The agent receives messages through the M365 Agents SDK, processes them using Claude's Agent SDK, and returns intelligent responses.
+
+## Key Features
+
+- **TypeScript/ESM** - Modern ES module syntax with full type safety
+- **Agentic AI** - Claude Sonnet 4.5 with tool use capabilities (WebSearch, WebFetch)
+- **Express Hosting** - HTTP server for agent communication
+- **State Management** - Conversation state tracking with MemoryStorage
+- **Error Handling** - Graceful error management and user feedback
+
+## Project Structure
+
+```
+src/
+├── client.ts   # Claude Agent SDK client wrapper
+└── index.ts    # M365 Agent SDK application & server
+```
+
+## Prerequisites
+
+- Node.js 16+
+- Anthropic API key ([Get one here](https://console.anthropic.com/))
+
+## Setup
+
+1. **Install dependencies:**
+   ```bash
+   npm install
+   ```
+
+2. **Configure environment:**
+   ```bash
+   cp .env.template .env
+   # Edit .env and add your ANTHROPIC_API_KEY
+   ```
+
+3. **Build the project:**
+   ```bash
+   npm run build
+   ```
+
+## Running the Agent
+
+**Start the server:**
+```bash
+npm start
+```
+
+**Test with M365 Agents Playground:**
+```bash
+npm test
+```
+
+This runs the agent and playground in parallel for interactive testing.
+
+## Configuration
+
+### Claude Agent Defaults
+
+Located in `src/client.ts`:
+- **Model:** Claude Sonnet 4.5 (`claude-sonnet-4-5-20250929`)
+- **Permission Mode:** Default (prompts for tool usage)
+- **Max Turns:** 15 conversation turns
+- **Continue Mode:** Enabled for context continuity
+
+### Custom Options
+
+Override defaults in `src/index.ts`:
+```typescript
+await claudeClient.invokeAgent(userMessage, {
+  model: 'claude-3-5-sonnet-20241022',
+  allowedTools: ['WebSearch', 'Read', 'Bash'],
+  maxTurns: 25
+});
+```
+
+## Development
+
+**Watch mode (auto-compile):**
+```bash
+npx tsc --watch
+```
+
+**Run without building:**
+```bash
+npm run start:anon
+```
+
+## Documentation
+
+- [Claude Agent SDK](https://docs.claude.com/en/docs/agent-sdk/typescript)
+- [Microsoft 365 Agents SDK](https://learn.microsoft.com/en-us/microsoft-365/agents-sdk/)
+
+## License
+
+MIT