How do you guys manage context and sync two AI models without maxing out the context window instantly?

Hey everyone, I've been working on a B2B SaaS project for a few months now using a "vibe coding" approach. I had a pretty solid workflow going, but I just hit a massive bottleneck with context management and could really use some advice on how to optimize token usage. Here is my current setup: Claude Opus 4.8 effort level high, Thinking ON The Brain: I use Claude mainly for architecture, logic, and generating prompts. The Executor: I use Google Gemini (via an AI agent) for the actual code execution. Context