We trained Mistral 7B, Qwen 8B, Gemma 9B models on 5 domains sequentially to test catastrophic forgetting. We achieved zero forgetting with medical knowledge retained at 100% after adding enterprise, finance, military, and real estate domains on top. Most fine-tuned models catastrophically forget everything they learned when you train them on something new. We built a continual learning engine that prevents this. First of its kind. We're shipping it as a SaaS platform at modelbrew.ai - dataset optimization + fine-tuning + continual learning in one pipeline. I'm looking for ML fine-tuning engineers and researchers who want to test this. DM me or comment below.