anth-sdk-patterns

# Anthropic SDK Patterns ## Overview Production-ready patterns for the Anthropic SDK covering client management, error handling, type safety, and multi-tenant configurations. ## Prerequisites - Completed `anth-install-auth` setup - Familiarity with async/await patterns - TypeScript 5+ or Python 3.10+ ## Pattern 1: Typed Wrapper with Retry ```typescript import Anthropic from '@anthropic-ai/sdk'; import type { Message, MessageCreateParams } from '@anthropic-ai/sdk/resources/messages'; class ClaudeService { private client: Anthropic; constructor(apiKey?: string) { this.client = new Anthropic({ apiKey: apiKey || process.env.ANTHROPIC_API_KEY, maxRetries: 3, // SDK handles 429 + 5xx automatically timeout: 60_000, }); } async complete( prompt: string, options: Partial<MessageCreateParams> = {} ): Promise<string> { const message = await this.client.messages.create({ model: options.model || 'claude-sonnet-4-20250514', max_tokens: options.max_tokens || 1024, messages: [{ role: 'user', content: prompt }], ...options, }); const textBlock = message.content.find((b) => b.type === 'text'); if (!textBlock || textBlock.type !== 'text') { throw new Error(`No text in response: ${message.stop_reason}`); } return textBlock.text; } async *stream(prompt: string, model = 'claude-sonnet-4-20250514'): AsyncGenerator<string> { const stream = this.client.messages.stream({ mode...