Crystal is a memory bank your AI tools share. It verifies what it cites, notices what it could not answer, researches its own gaps, and holds new knowledge behind review until it earns trust.
Most memory systems accumulate. Crystal curates.
Every fact remembers where it came from: your own words, an ingested document, or the model's reasoning. Those are different kinds of truth, and Crystal never confuses them.
Contradictions get surfaced, unanswered questions become tracked gaps, autonomous research fills them behind your review, and knowledge earns its tier instead of asserting it.
Connect any MCP tool with a sign-in. Ask what you are working on in Claude at noon and Cursor at midnight; both answer from the same verified bank.
The roadmap is public. The research agenda is a list of nine measurable ways this product might be failing, maintained by the people building it, and anyone can claim an experiment. Defects found live get fixed in the open and pinned with tests so they cannot return.
Upgrade when you need capacity, never because a clock ran out. Reads never stop.