Examples

The escalation ladder: six runnable rungs that double as the DX regression suite.

The examples/ directory is an escalation ladder, each rung a runnable app with its own tests:

1. 01-hello — one query, one error, no shells: the minimal surface.
2. 02-todo — mutations, optimistic updates, the basic onion, an error catalog over a shell-narrowed union.
3. 03-docs — the whole system: a service graph, optional→required layers, a four-shell onion, entity models, a rendered subscription, and a defect boundary. Its probes assert the payoffs directly: a query resolving a dozen possible failures presents exactly doc/not-found, and the avatar mutation patches the header by identity — the test proves exactly one request (the mutation) with zero refetches.
4. 04-router — TanStack Router integration by hand: routes are shells. Pathless layouts mount the session and viewer layers, a route claims its feature error, errorComponent receives escalated defects, onError navigates, and layout loaders prefetch each layer’s context procedure so the first paint has no fallback states.
5. 05-router-glue — rung 4 rebuilt on app-owned glue (router-glue.tsx, ~60 lines): routeShell fragments spread into createRoute, so one declaration per layer produces both the provider component and the prefetch loader — proof the integration needs no package.
6. 06-sentry — the observability pillar end to end: a Sentry-shaped stub receives wire breadcrumbs, the claimed trail with its owning shell, severity-routed server captures, and a defect whose captured exception carries the same incident id the client received — correlation with no request-id plumbing.