estorm: Event Storming boards as plain text

Thu, 22 Oct 2026 09:00:00 +0300

Event Storming workshops are great. What comes after them usually isn’t: a few photos of a wall full of stickies that nobody looks at again, and that go stale the moment the model changes.

estorm is my attempt at fixing that. You write the flow as plain text and get a board of stickies, rendered as SVG:

== Sales ==
Customer: Place order -> (Order) -> OrderPlaced
 after 30 minutes unless PaymentCaptured
 then Cancel unpaid order -> (Order) -> OrderCancelled

== Payments ==
when OrderPlaced
 then Charge card -> [Payment provider] -> PaymentCaptured
 ! What if the charge succeeds but our callback times out?

Actors, commands, aggregates, external systems, policies, read models and hotspots each have a short notation, and bounded contexts become swimlanes.

Projects on Viklund

estorm: Event Storming boards as plain text