[svelte-triage-bot]

• Reactive render-tree writes before initial rendering left empty data and undefined children in async batch history.
• #16301 replaced the generated root with recursive snippets and #16547 made nodes reactive; construct complete bottom-up trees in both renderers and install the root before first render.
• Retain reactive navigation updates and data-identity reuse; reject optional-chaining guards and pre-render flushes because they mask incomplete initialization rather than prevent it.
• Preserve owning-depth boundaries and reset ordering from #16526; cover SSR/CSR startup, reload, navigation, invalidation and browser back.

Fixes #17383

[pkg-svelte-dev]

Install the latest version of @sveltejs/kit from ae16266:

pnpm add https://pkg.svelte.dev/@sveltejs/kit/c/ae162663d7777ed65e470887e3e630203437543b

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/kit/pr/17385

Note

This PR is from a fork. A maintainer must approve approve each commit before it can be built and installed.

[changeset-bot]

🦋 Changeset detected

Latest commit: ae16266

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@sveltejs/kit	Patch

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[teemingc]

closing because it's probably better that we fix this in svelte so that changing things before hydration doesn't record the changes as a batch