Editorial posture

The library is organized around decisions that keep recurring in payment architecture, AI systems, and Doric product work. New notes lead by publish date, while topic lanes connect related arguments without turning the index into an archive wall.

Decision frame

Recommendation, rejected paths, and the operating proof behind the call.

Visual proof

Diagrams and original artifacts stay near the argument they explain.

Source posture

Public claims stay tied to released work or cited material.

Payments

Sanctions screening as code: one policy, a different actuator per rail

The payment is final in under a second and your sanctions analyst is still opening the alert. On an instant rail there is no review window, so the screen has to clear or stop the payment in code, inside the latency budget. The policy model can be common across rails. The action on a hit cannot, because RTP, the card networks, and SEPA Instant each demand a different commit semantic.

Sanctions screening as code: one policy, a different actuator per rail visual preview

Lead essay

The current Doric argument leads the index ahead of the chronological archive.

Read the note

01 / Payments

Commerce architecture

Merchant-of-record decisions, checkout ownership, billing operations, settlement, reconciliation, and risk boundaries.

02 / AI tooling

Practical AI systems

Agentic commerce, multi-agent orchestration, model fine-tuning, runtime governance, and production deployment.

03 / Build notes

From idea to system

The design, architecture, and operating decisions behind Doric Stack products as they move from prototype to public release.

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