cohere-migration-deep-dive

# Cohere Migration Deep Dive ## Overview Comprehensive guide for migrating to Cohere from OpenAI, Anthropic, or other LLM providers, including embedding re-vectorization, prompt adaptation, and gradual traffic shifting. ## Prerequisites - Current LLM integration documented - Cohere API key and SDK installed - Feature flag infrastructure - Rollback strategy ## Migration Types | From | Complexity | Duration | Key Challenge | |------|-----------|----------|---------------| | OpenAI → Cohere | Medium | 1-2 weeks | Prompt adaptation, embedding migration | | Anthropic → Cohere | Medium | 1-2 weeks | Message format, tool definitions | | Custom/OSS → Cohere | Low | Days | SDK integration | | Embedding migration | High | 2-4 weeks | Re-vectorize entire corpus | ## Instructions ### Step 1: OpenAI to Cohere Chat Migration ```typescript // --- OpenAI (before) --- import OpenAI from 'openai'; const openai = new OpenAI(); const response = await openai.chat.completions.create({ model: 'gpt-4o', messages: [ { role: 'system', content: 'You are helpful.' }, { role: 'user', content: 'Hello' }, ], max_tokens: 500, temperature: 0.7, }); const text = response.choices[0].message.content; // --- Cohere (after) --- import { CohereClientV2 } from 'cohere-ai'; const cohere = new CohereClientV2(); const response = await cohere.chat({ model: 'command-a-03-2025', // GPT-4o equivalent messages: [ { role: 'system', content: 'You are helpful.' }, // Same format! { r...