Exports `getOrCreateModel`, a reusable function that retrieves an existing Monaco model by URI or creates a new one if it doesn't exist. This pattern is essential for any application that needs to manage multiple editor models (e.g., tabbed code editor) and can be extracted with zero modifications. It delegates to internal helpers `getModel`, `createModel`, and `createModelUri`, each a single-responsibility function that could be reused independently.

Implements `useUpdate`, a custom React hook that runs a side effect only on dependency updates, skipping the initial mount. The hook takes an additional `applyChanges` boolean parameter to conditionally skip effects. This is a robust pattern for controlling `useEffect` execution that can be extracted and reused in any React project to avoid running effects on first render.

Implements `useMonaco`, a hook that asynchronously obtains the monaco instance via the loader. It stores the instance in state after resolution and returns it (or null if not yet ready). Importantly, it handles cancellation via the loader's cancelable promise in the cleanup function, preventing memory leaks. This pattern is reusable for any async initialization that needs to be tied to component lifecycle.