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docs: add the v4 upgrade guide for apps and rework the module migration guide - #1108
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…rver boots Since a1fcef8 the catalog resolves nitro 3.0.260903-beta while the pinned Nuxt nightly still depended on 3.0.260610-beta. With two Nitro copies installed, Nuxt's nitro:dev-service-proxy fails to load nitro/h3 from the second one and every dev server in the repo 500s, which is why e2e has hung and been cancelled on every run since. Move to the current Nuxt nightly, which depends on nitro 260903 itself, and drop the 260610 patch: 260903 already skips the nitro build for static generates upstream.
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Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 1 remain after this review. 📝 WalkthroughWalkthroughThe documentation now describes DevTools v4 requirements, setup, authorization, and migration from v3. The module guides and module-starter playground use the Vite DevTools dock, scoped RPC, and terminal APIs. Workspace nightly package versions and release-age exclusions change, the Nitro patch is removed, and the contribution guide updates its pnpm version. Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🔵 Low · up to Two module-guide examples remain unreliable: the dock-update snippet omits the callback that supplies Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 8 systems. Changed systems: Architecture concerns Review detailsSystems and components
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Review comments at @docs/content/1.guide/3.upgrading-to-v4.md:
- Line 12: Update the Vite requirement in the upgrading-to-v4 guide from 8.1.5
to ^8.3.2 to reflect the minimum required by @vitejs/devtools@0.7.6. Clarify
that Nuxt 4.5+ and Nuxt 5 must use a Vite version meeting this requirement,
while preserving the note that Nuxt 4.0–4.4 ship Vite 7 and cannot run DevTools
v4.
Review comments at @docs/content/2.module/0.guide.md:
- Around line 49-50: Wrap the `ctx.docks.register` and `entry.update` calls in
the `onDevtoolsReady` callback, using its `ctx` parameter so the snippet does
not reference an out-of-scope variable.
- Line 117: Move the one-time `rpc.broadcast()` out of `onDevtoolsReady()` and
into a registered server action, then call that action only after the iframe
registers its `show-notification` event handler. This ensures the notification
reaches the connected client without changing the event handler’s behavior.
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README.mddocs/content/1.guide/0.getting-started.mddocs/content/1.guide/1.features.mddocs/content/1.guide/3.upgrading-to-v4.mddocs/content/2.module/0.guide.mddocs/content/2.module/1.utils-kit.mddocs/content/2.module/3.migration-v4.mddocs/content/3.development/0.contributing.mdpatches/nitro@3.0.260610-beta.patchplans/008-fix-migration-docs.mdplans/README.mdplaygrounds/module-starter/client/components/ModuleAuthorNote.vueplaygrounds/module-starter/client/pages/index.vueplaygrounds/module-starter/package.jsonplaygrounds/module-starter/playground/nuxt.config.tsplaygrounds/module-starter/src/devtools.tsplaygrounds/module-starter/src/module.tsplaygrounds/module-starter/types.tspnpm-workspace.yaml
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- plans/008-fix-migration-docs.md
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- docs/content/1.guide/1.features.md
- patches/nitro@3.0.260610-beta.patch
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Its nuxi prepare now declares every #build template as an ambient module and resolves #imports for real, so the ts-expect-error on the settings import becomes unused and the client plugin's inferred type cycles through the composables it calls.
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build:client re-stubbed @nuxt/devtools through dev:prepare after turbo had already built it, so a root pnpm build left a jiti stub in dist. The published package was unaffected (prepack builds only the module), but everything packing after a root build shipped the stub. The client only needs the built module for types, which turbo already orders first. Also use ts-ignore for the #build/devtools/settings import: whether nuxi prepare declares it depends on the setup, so ts-expect-error fails in one environment or the other.
…on guide The migration page was a list of deprecation codes with no explanation of the new model and nothing for app developers. Split it in two: - guide/upgrading-to-v4: requirements (Nuxt 4.5+ / Vite 8), how Nuxt 4 users opt in, the authorization prompt, what moved where, option changes, and troubleshooting. - module/migration-v4: the Vite DevTools model, whether to migrate now, an at-a-glance table, then a step-by-step walk (deps, docks, scoped RPC, iframe client, terminals, messages) that keeps every NDT_DEP anchor the diagnostics link to. Fixes the enablePages(token) example and the Vite peer range, and drops the outdated claim that categories and launch views are not covered. The module authors guide now teaches the v4 API first, and the module-starter playground is migrated to it so the docs have a worked, browser-verified example. README, getting started and the features page no longer describe v4 as alpha or mention the removed popup/split view.
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Stacked on #1107 (the dev server must boot to verify any of this).
The existing migration page was a list of deprecation codes ordered by number: no explanation of the new model, no guidance on whether or when to migrate, and nothing for app developers — while the README and getting-started still called v4 an alpha and pointed at the nightly channel. This gets the docs into shape for a stable release.
For app developers — new
guide/upgrading-to-v4@nuxt/devtoolsto^4.0.0; Nuxt 4 still bundles v3), the one-time authorization prompt,vite.devtools: false.Nuxtgroup, Options Viewer → Data Inspector, VS Code → Code Server, popup/split screen removed, wizard removed), option changes, whatNDT_DEP_*lines in the terminal mean, troubleshooting.For module authors — reworked
module/migration-v4onDevtoolsReady, Vite DevTools hosts), a clear "migrate now" recommendation with what a migrated module requires, and an at-a-glance table.launcherfor lazy launch,vnodecaveat), scoped RPC, the iframe client (native docks do not get__NUXT_DEVTOOLS__; usegetDevToolsRpcClient()and read the host client from the parent window), terminals, messages.#ndt_dep_xxxxanchor the diagnostics link to is preserved.enablePages(token)→enablePages()(plan 008), Vite peer^8.0.14→^8.1.5,ctx.messages.info()(does not exist) →ctx.messages.add(), and the claim that categories/launch views are not covered by docks (they are; verified).Module authors guide (
module/guide) now teaches the v4 API first, with the legacy path living in the migration guide.playgrounds/module-starteris migrated to the v4 API and is the worked example the guides link to. Verified in a real browser against the built package: the entry registers inside theNuxtgroup, scopedrpc.callround-trips, thegreetingbroadcast reaches the iframe,window.parent.__NUXT_DEVTOOLS_HOST__is readable from the native dock, and the client dev server shows up in the Terminals dock. Usesctx.scope()/kit.scope()rather thandefineRpcFunction, because the latter does not type-check againstctx.rpc.registerin@vitejs/devtools-kit0.7 (upstream packages cast withas any); the scoped API needs no casts and no augmentation.Also: README/getting-started no longer say "alpha", the features page drops the removed Popup/Split Screen sections, and contributing says pnpm 12 instead of 8.
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