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DeepSeek V4 API: The Complete Developer Guide
A hands-on guide to integrating the DeepSeek V3 API in JavaScript applications using the OpenAI-compatible SDK. Covers environment setup, first API call, multi-turn conversations, streaming, JSON mode, and building a complete AI-powered code reviewer CLI tool. Also includes a migration guide for teams switching from OpenAI, retry logic with exponential backoff, prompt engineering tips, and token cost optimization strategies.