campfirein/cipher: Byterover Cipher — Open-Source Memory Layer for Coding Agents With Three-System Architecture, 3,609 Stars

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Byterover Cipher is a TypeScript open-source memory layer specifically designed for coding agents, implementing a three-system architecture: System 1 (programming concepts, business logic, past interactions), System 2 (model reasoning steps during code generation), and Workspace Memory (team-shared context). It auto-creates memories from coding sessions without manual input and exposes all three tiers via MCP, making it compatible with Cursor, Codex, Claude Code, Windsurf, Gemini CLI, AWS Kiro, Warp, and more.