feat: migrate to svelte 5, modernise repo

[rdunk]

Updates this template to use @sanity/sveltekit over @sanity/visual-editing and @sanity/svelte-loader.

Also moves to eslint flat config, updates dependencies, etc.

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
sanity-template-sveltekit-clean	Error			Oct 22, 2025 7:08pm
sanity-template-sveltekit-clean-studio	Ready	Preview	Comment	Oct 22, 2025 7:08pm

[rdunk]

• #57 👈 (View in Graphite)
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[socket-security[bot]]

[!WARNING] Review the following alerts detected in dependencies.

According to your organization's Security Policy, it is recommended to resolve "Warn" alerts. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Warn		[email protected] has a License Policy Violation. License: LicenseRef-W3C-Community-Final-Specification-Agreement (package/ThirdPartyNoticeText.txt) From: package-lock.json → npm/[email protected] ℹ Read more on: This package | This alert | What is a license policy violation? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at [email protected]. Suggestion: Find a package that does not violate your license policy or adjust your policy to allow this package's license. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/[email protected]. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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[socket-security[bot]]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​sveltejs/​adapter-auto@​3.3.1 ⏵ 7.0.0	+1		+1	+4
	@​sanity/​types@​3.66.1 ⏵ 4.11.0			+2
	typescript-eslint@​8.46.2
	@​sanity/​sveltekit@​1.0.3
	prettier-plugin-packagejson@​2.5.1 ⏵ 2.5.19	+1		+2	-1
	@​sanity/​prettier-config@​2.0.1
	autoprefixer@​10.4.20 ⏵ 10.4.21	+1		+1
	@​types/​react@​18.3.14 ⏵ 19.2.2	+1		+1
	groq@​3.66.1 ⏵ 4.11.0			+1
	@​types/​node@​18.19.67 ⏵ 24.9.1	+1		+1
	@​sveltejs/​kit@​2.22.0 ⏵ 2.47.3			+2	+1
	@​sveltejs/​vite-plugin-svelte@​3.1.2 ⏵ 6.2.1	+1		+1
	@​portabletext/​svelte@​2.1.11 ⏵ 3.0.1
	postcss@​8.4.38 ⏵ 8.5.6	+1		+1
	react@​18.3.1 ⏵ 19.2.0	+1
	prettier-plugin-svelte@​3.3.2 ⏵ 3.4.0	+1			+1
	@​sanity/​eslint-config-studio@​3.0.1 ⏵ 5.0.2	+1		+3	+1
	concurrently@​9.1.0 ⏵ 9.2.1	+1		+1
	globals@​11.12.0 ⏵ 16.4.0			+2
	styled-components@​6.1.13 ⏵ 6.1.19	+1		+1
	eslint-config-prettier@​9.1.0 ⏵ 10.1.8	+1		+29
	svelte@​4.2.19 ⏵ 5.41.2			+1
	@​sanity/​image-url@​1.1.0 ⏵ 1.2.0				-1
	@​portabletext/​types@​2.0.13 ⏵ 2.0.15	+1		+1	-2
	prettier@​3.3.3 ⏵ 3.6.2	+1
	typescript@​5.7.2 ⏵ 5.9.3	+1		+1
	@​eslint/​compat@​1.4.0
	react-dom@​18.3.1 ⏵ 19.2.0	+1		+1
	svelte-check@​4.3.3
	@​eslint/​js@​8.57.1 ⏵ 9.38.0			+14
	eslint@​8.57.1 ⏵ 9.38.0	+1			+1
	@​sanity/​vision@​3.66.1 ⏵ 4.11.0			+1
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[manuelsanchez2]

What is stopping this from merging? It would be great to use Sanity with Svelte 5!

[kenjonespizza]

What is stopping this from merging? It would be great to use Sanity with Svelte 5!

Hi @manuelsanchez2 👋 . Thanks for nudging this. We are awaiting a fix of something upstream to be able to merge this.

In the meantime you could check this testing branch I I created updating to Svelte v5: https://github.com/sanity-io/sanity-template-sveltekit-clean/tree/experimental-upgrade-to-svelte-5. If I remember correctly, bumping the Svelte version up did not create any breaking changes, as seen in this commit 😄 https://github.com/sanity-io/sanity-template-sveltekit-clean/commit/6c4c62565ba583d405e4b185f795a1a25907b778