LEAK: Anthropic is testing persistent "Knowledge Bases" for Claude Cowork

Claude Cowork is being updated with persistent Knowledge Bases that **store** topic specific context like preferences, decisions, facts and lessons learned. **Instead** of relying only on session memory, Claude can proactively check and incrementally update these KBs while working. This points **toward** longer term task continuity and project level memory rather than prompt bound workflows. Cowork mode is also set to **merge** with Chat mode and become the default Claude desktop interface, suggesting a shift toward a unified workspace experience. **Source:** Claude Beta Testers