I built an Agent Memory System for myself and got 90.8% (end-to-end) on LongMemEval

Like most users of AI agents like Claude Code, I have been frustrated by the agent memory problem. The models have gotten extremely good and no longer lose focus in one long conversation like they used to, but across sessions the memory is pretty spotty whether it's a conversation with an LLM where it recalls imperfect or irrelevant data from previous chats, or a new Claude Code session where I feel like it's Groundhog Day onboarding a brand new employee who's smart and talented but knows nothin...