Enterprise architecture you can read, then run.

How it works

• Read

  Static case studies

  Each write-up covers the problem, the architecture and the trade-offs behind a production system. Pages are pre-rendered and ship no JavaScript unless they embed a demo.

• Run

  Live API simulations

  Mock versions of the systems run on Cloudflare’s edge, backed by D1 seed data. Dial in latency or force an upstream failure to see how a client should cope.

• Isolate

  Per-session state

  Every playground session is scoped by its own ID, rate-limited through KV, and falls back to a shared, read-only seed dataset.

• Double-entry ledger with CQRS projections

  Ship a ERP

  A multi-tenant ERP built around an immutable double-entry ledger, with every AI feature metered and governed through a single gateway.

• Queue-driven fulfillment with nightly batching

  Ship a Postcard

  Design, pay for and mail real postcards: AI artwork, a developer API and a nightly batch engine that hands orders to a commercial print network.