Public explainer
An open, modular UI platform is not just a collection of APIs. It is a governed operating model that lets agencies adopt interoperable capabilities from multiple sources without losing control of policy, data, or operations.
"Open, modular platform" can sound like a technical phrase. In unemployment insurance, it should mean something practical.
It means a state should be able to operate and improve its UI system using capabilities that are defined, tested, replaceable, and governable. It means the state should not have to replace everything in order to improve one important function. It means multiple providers should be able to compete against shared expectations. It means public agencies should retain control of policy, data, security, and operations.
An open, modular platform is not the same thing as a traditional product with internal modules. Many systems are modular inside the vendor's architecture but closed from the state's perspective. If the state cannot replace a component, validate another provider, or reuse the boundary elsewhere, the practical value of modularity is limited.
An open, modular model starts with public boundaries.
A boundary explains what a capability does, what information it needs, what information it produces, what events or status changes it exposes, what evidence it preserves, and what obligations it has to other parts of the system.
In UI, examples of capabilities may include claimant identity, claimant profile, employer response, correspondence, document management, benefits, tax, issues, appeals, payments, integrity review, reporting, notification, staff tasks, and claim status. The exact boundaries require governance, but the principle is clear: the system should be understandable as a set of capabilities that can work together.
The next requirement is a communication model. UI capabilities need to exchange information in different ways. Some interactions need immediate responses. Others represent events, commands, status changes, or evidence that must be recorded and handled reliably. The platform should make those patterns consistent enough that each provider does not need a custom integration with every other provider.
The third requirement is governance. Interfaces change. State law changes. Federal expectations change. Security practices change. Vendors update products. Open modularity only works if someone manages versions, changes, acceptance criteria, documentation, and compatibility expectations over time.
Governance is what keeps modularity from becoming fragmentation.
The fourth requirement is conformance. A provider should be able to demonstrate that a capability satisfies the required expectations. A state should be able to review evidence before relying on the capability in production. Conformance can include tests, documentation, security review, accessibility review, audit behavior, monitoring, and operational playbooks.
The fifth requirement is adoption support. States need practical ways to evaluate options, procure or pilot capabilities, deploy them, configure them, train staff, monitor performance, and expand when ready. A marketplace or store model can help organize this process, but the value comes from governance and evidence, not from a catalog alone.
"Open" does not mean uncontrolled. Open means that important expectations are visible enough for agencies, vendors, open-source contributors, and public stewards to evaluate and improve the ecosystem. A state can still use proprietary software. Vendors can still compete. Security and privacy still matter. Operational controls still apply.
"Modular" does not mean disconnected. Modular capabilities must work together. They must preserve data integrity, auditability, security, and operational continuity. A poorly integrated set of modules can be worse than one legacy system. Modularity only helps when the interfaces and operating model are governed.
"Platform" does not mean every state gets the same UI system. State law and operations still matter. A platform provides the shared structure that lets states adopt different capabilities without rebuilding the entire foundation each time.
This model can support several kinds of providers. A vendor may implement a capability as a managed service. A state may reuse a component developed elsewhere. An open-source project may provide a baseline implementation. A system integrator may help configure and operate a set of capabilities. The platform makes those options more comparable and more governable.
The benefits are practical:
- States can modernize incrementally.
- Vendors can compete on specific strengths.
- Open-source work can become reusable with the right governance.
- Federal investments can produce assets that more than one state can use.
- Procurement can focus on capability fit and evidence.
- Agencies can preserve future options.
The biggest misconception is that open modularity is only an architecture decision. It is also a procurement decision, a governance decision, a market design decision, and an operational decision.
An open, modular UI platform should make change easier without making accountability weaker. It should help agencies adopt better capabilities while preserving public control over law, policy, data, security, and service delivery.
That is the standard that matters.
See how Solid State helps agencies define capability boundaries, evaluate readiness, and move toward governed modular adoption.