What Cotomy Tries to Solve
Structural problems in long-lived business UI systems and why Cotomy exists.
Cotomy Blog
Notes on building a DOM-first UI runtime for long-lived business applications.
Start Here
New to Cotomy? Start with the core problem, the design philosophy, and the runtime behavior.
Cotomy Design Philosophy
The architectural decisions behind a DOM-first UI runtime.
How Cotomy Works
Usage-focused articles showing how the runtime behaves in real screens.
Recent Writing
The latest entries across the Cotomy blog.
Core Principle
Building Business Screens with Cotomy
A practical guide showing how I usually structure search screens, edit screens, and read-only screens in Razor Pages with Cotomy.
Project Template
Introducing Project Templates for Razor Pages
Cotomy project templates for Razor Pages are now available in Standard and Professional editions. They are designed for CRUD-heavy business applications where teams want to avoid rebuilding page structure, form flow, authentication, and persistence from scratch.
Core Principle
Where State Actually Changes
In CRUD screens, the core problem is often not where state is stored, but whether the mutation path is defined. Once load, input, save, and reload are allowed to diverge, the screen becomes difficult to reason about.
Core Principle
Synchronizing UI and Server State
Server-side postback screens were limited, but they kept one execution path. Once Ajax became the main update mechanism, keeping display, input state, and server truth aligned became a structural problem.
Core Principle
Screen State Consistency in Long-Lived UIs
State failures in business UIs are usually not isolated bugs. They appear when DOM state, in-memory state, and server state have no explicit ownership and synchronization rules.
Core Principle
Entity Identity and Surrogate Key Design
Why I moved from natural keys to surrogate keys, and why that change made both database design and application code easier to manage.
Series
Explore the Cotomy Series. View all series →
Cotomy Problem Series
Structural problems in web application development and the architectural ideas that led to Cotomy.
Cotomy Design Series
Articles discussing architectural decisions and design philosophy behind Cotomy.
Cotomy Practical Series
Practical guides for building screens and workflows with Cotomy.
Cotomy Development Backstory
Development stories and architectural turning points behind Cotomy.
Cotomy Usage Series
Usage-focused articles showing how Cotomy APIs behave in real screens.
Cotomy C# Architecture Series
Articles about C# architecture decisions connected to long-lived business systems.
Razor Pages Templates Series
Release and usage articles for the Cotomy Razor Pages project templates.
Misc Series
Essays, industry observations, and development experiences across software work.
Release Notes
Version history and release updates for Cotomy.
Release Note
Cotomy v1.0.5
Patch release that simplifies default bind generator state handling and refreshes release-note references.
Release Note
Cotomy v1.0.4
Patch release adding page-level default bind name generator support.
Release Note
Cotomy v1.0.3
Patch release restoring attached semantics and adding isConnected support in runtime behavior.
Release Note
Cotomy v1.0.2
Release focused on attached-state consistency updates and reference/documentation alignment.
Release Note
Cotomy v1.0.1
Patch release that fixes request keepalive handling on page unload.
Release Note
Cotomy v1.0.0
First stable major release. Establishes Cotomy as a production-ready foundation for business web applications.
