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AETHER-33 free until 2027-01-01 governed agent memory docs measured 33 invariants homepage

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AETHER-33, explained

How AETHER-33 works, what it refuses to do, and how to try it in two minutes.

16 short pages. New here? Start with the quick start. Everything described here is live, and every limit is stated on the Limits page.

What AETHER-33 isA memory service for AI agents that remembers facts, refuses to be talked into giving orders, and keeps a tamper-evident record of every change.
Quick start: try it in two minutesSave a fact, try to save an attack, search, and download your signed history. Copy and paste.
What happens when you save a memoryThe same steps run every time, in order, with no AI model involved.
How search worksSearch matches the words in your question. The same question always gives the same answer.
Quarantine: instructions are not memoriesText that tries to give the agent orders is stored, locked away, and only released by a person.
The tamper-evident logEvery change is recorded in a chain of fingerprints. Editing or removing an entry breaks the chain.
Deleting: forget the content, keep the proofDeleting erases what the memory said but keeps a record that it existed and was deleted.
Contradictions are flagged, never decidedWhen a new memory seems to say the opposite of an old one, both are kept and the pair is flagged for a person.
Memory is never permissionA memory can inform a decision. It can never be a decision. Every answer says so in a machine-readable way.
Your memories are yoursEvery request is tied to one account, and no search or read can reach another account's memories.
The 33 live checksThirty-three checks run against the real service and a real database. A check that crashes counts as a failure.
Connecting your agentWorks over plain HTTP or as an MCP server, with any agent framework.
Limits, stated plainlyWhat AETHER-33 does not do today.
Measured numbersSpeed and correctness from a real run on one machine. Not a production benchmark.
Free until 1 January 2027No card, no key, no account. Daily limits apply.
Questions people askShort, straight answers.
AETHER-33 is a product over CAIN-42's governed-memory stack, not a new architecture moat. Memory never carries authority: every response is annotated grants_authority: false. No third-party audit has been performed. Limits · FAQ · what is live now