Byterover Cipher: Open-Source Universal Memory Layer for Coding Agents Ships MCP Support Across All Major IDEs — 3.6K Stars

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campfirein/cipher is Byterover's open-source memory layer purpose-built for coding agents, compatible with Cursor, Codex, Claude Code, Windsurf, Cline, Claude Desktop, Gemini CLI, AWS Kiro, VS Code, Roo Code, Trae, Amp Code, and Warp via MCP. Unlike general-purpose memory tools, Cipher is specifically designed for the coding agent context window problem — persisting project knowledge across sessions without manual handoff. It ships as an npm package and has a dedicated Product Hunt listing.