Solid and Effect

Read this when changing apps/web/src/api/solid-effect.ts or adding an Effect read to a component.

• Provide RuntimeContext with createRuntime(layer) inside a Solid owner. Missing providers throw. Owner cleanup disposes the runtime.
• Call runEffect inside a component or computation. It reads the provider and returns an async iterable that starts one fiber per iterator.
• Return that iterable from createMemo. Solid owns pending, value and error state through Loading and Errored.
• On a superseded or disposed read, Solid closes the iterator. The adapter interrupts the fiber and waits for its finalizers in return(). Solid itself does not await that promise, so replacement reads can overlap cleanup.
• A closed iterator cannot publish a stale result. Pure interruption ends iteration; other active-read failures throw into Solid's error boundary.
• Use this adapter for reads. UI disposal must never abort a remote upload. Durable transfer state and explicit cancellation belong to the transfer workflow in RELIABILITY.md.
• Browser reads use WebLayer. SSR reads use a request-specific serverLayer that forwards incoming cookies and appends renewed cookies to the response. Async rendering completes these reads before headers are sent.

There is no generic mutation adapter. Add mutation behavior when a real caller needs it, using the installed Effect and Solid contracts.