Keep projects moving across ChatGPT, Codex, Claude, and other AI tools with one private continuity layer. Arkon Vault finds the right project context, runs a preflight before work starts, records decisions, and creates structured handoffs so every AI can continue from the same vision and next step. Use it to search shared project memory, prevent parallel forks, checkpoint progress, and leave a clear closeout for the next session. Workspaces are privately isolated, connections use scoped OAuth access, and Arkon Sync can optionally capture supported local sessions.