Architecture decision records capture the choices that shaped Noema, the alternatives considered, and the consequences accepted. They are reproduced here in order. ADR-0002 was corrected in 0.2: the event sequence is not gap-free, cursors tolerate gaps by construction, and a test proves it. ADR-0009 and ADR-0010 record the two decisions the review added: redaction as the only write on append-only history, and Amazon Bedrock over a standard-library signer rather than a vendor SDK.

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