Coexistence with the stack you already run

Every integration conversation should start here, and most stall because it is skipped. If your system of record is authoritative, the layer reads entities, positions and documents from it and writes decisions, evidence and workflow state back. If you would rather the layer hold the operational record for a segment, it can, and export keeps that reversible.

Both patterns are common. What causes trouble is leaving it ambiguous, because two systems that each believe they are authoritative will disagree in front of a client.

Reporting and analytics teams do not need to change where they read from. Decision, evidence and workflow output is available through the API and as events, so it can land in the warehouse alongside everything else and feed the dashboards that already exist.

What the warehouse gains is a class of data it did not previously hold: the reasoning behind a decision, the sources behind a claim, and the state transitions of an operational workflow, all keyed to the same entities it already tracks.

Where a reporting stack is already in place and clients like the output, the sensible pattern is to keep it and let the layer supply the figures with their provenance. Where the reporting stack is the thing partners want to replace, the layer generates packs and statements from live records instead.

Start read-only against real records for one segment, so the output can be compared with what the current process produces. Add write-back for one workflow. Then extend by capability rather than by user count, which keeps every step reversible and keeps the operations team out of a big-bang cutover.

Settlement, custody, registry and administration steps stay where they are, with you or your licensed counterparties. Reuben AI does not hold client money and does not settle transactions. The layer records and coordinates those steps rather than performing them, which is what allows it to be added without touching your licensed arrangements.