Cipher: Cross-Platform Memory Layer for Coding Agents — Cursor, Claude Code, Codex, Windsurf, Kiro

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Byterover Cipher (3,587 GitHub stars) is an open-source memory layer designed specifically for coding agents, with native compatibility across Cursor, Codex, Claude Code, Windsurf, Cline, Claude Desktop, Gemini CLI, and AWS Kiro. Unlike general-purpose memory systems (mem0, etc.), Cipher is purpose-built for the coding agent use case with semantic storage optimized for code decisions, architecture context, and session handoffs. The cross-platform compatibility makes it a candidate solution for teams running heterogeneous agent setups.