RMT State Selector Runtime

Typed state, selectors and reducers as a runtime foundation.

What it covers

The state selector runtime separates canonical RMT state from derived view models. Selectors read known paths; reducers change state through actions, while renderers consume results only.

Public building blocks

• xtendrmt/rmt-state-selector-runtime.js implements state, selectors, and reducers without a DOM capability.
• xtendrmt/rmt-state-binding-view-projector.js projects frozen model snapshots through the shared DOM renderer; the former binding helpers remain compatibility delegates for 0.6.
• xtendrmt/rmt-state-selector-runtime.d.ts describes the public runtime surface.
• tests/fixtures/rmt-state-selector-runtime.rmt covers compile and host integration.

runtime contract: xtend.epic18.rmt-state-selector-runtime.v2
stateProjectionPort: injected-host-adapter
preservePatchPlan: selection updates keep the existing DOM patch plan
next workpackage: WP-E18-08

Recommended workflow

Define state and selector in source, compile references, and only then inject the host-state adapter. A selector must not perform DOM work or side effects; missing paths produce diagnostics.

Next steps

• XTendRMT overview
• RMT Authoring Guide
• RMT Linter
• RMT Language Server