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Banking architecture

Curated insights and technical field notes on Banking architecture.

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Start with the approved decision note. Topic lanes open only after more approved notes give each lane distinct substance.

Decision notes

Clear recommendation, rejected paths, and proof trail.

Systems maps

Visual artifacts sit near the section they explain.

Source posture

Public claims stay tied to released work or cited material.

Payments

ISO 20022 coexistence ends, and translation layers come due

Your bank says it is "ISO 20022 ready" for the November 22 cutover. Check the docs and it is usually a translation layer - MT to MX at the SWIFT boundary, MX back to MT inside. That is compliant, and it quietly throws away the structured data that was the whole point.

Lead essay

Start here when you want the current Doric argument instead of a chronological archive.

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Current library

Start with the lead decision note.

The archive starts narrow by design. New Field Notes enter only when they meet the same proof, source, and visual-artifact bar.