Where NO must hold.

Every solution page follows the same logic: declared decision, possible consequence, units measured, receipts required, client gain, delivered pack.

Payment, settlement, fee, refund, webhook, provider object.

Tool calls, tokens, memory writes, DB mutations, workflows.

Signed URLs, credentials, DB mutations, replicas, tenant boundary.

Sensor freshness, command receipts, physical consequence proof.

Evidence layer for clients, providers, integrators and platforms.

Start with one boundary, read-only, 3–6 receipt files.