Core is personal cloud memory for AI-native work. It is where a user's agent checkpoints, drafts, decisions, tasks, skills, memory, and saved work can persist across Codex, Claude, ChatGPT, Cursor, and future agents.
The key idea is simple: agents change, models change, and harnesses change. Your useful context should not disappear when you switch from Codex to Claude, ChatGPT, Cursor, or the next tool.
Core gives external agents a place to read visible context and write private memory back through MCP. An agent can start by loading context the user is allowed to see, do work in its own harness, then record useful private outcomes, decisions, risks, tests, and follow-up tasks back into Core.
Core is not trying to replace every app. It sits underneath the tools and agents a user already uses so their work compounds into personal cloud memory. Teams can also add shared company material for agents to reference, but agents should only change shared material when explicitly asked.