Upgrade to Next.js 16#6
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- Bump next from ^14.2 to ^16.2.4 (resolved 16.2.6) - Bump @policyengine/ui-kit from ^0.8.0 to ^0.9.0 - Add turbopack.root to next.config.js to silence stray-lockfile warning React 19 and Tailwind 4 already in place. Static export, data pipeline, and all public/data CSVs preserved. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Clean upgrade to Next.js 16. Verified that:
- Package versions match the PR description (next ^16.2.4, ui-kit ^0.9.0)
- Static export configuration is preserved (
output: 'export'andimages.unoptimizedretained) - The
turbopack.rootaddition properly points to__dirnameto silence stray-lockfile warnings - Lockfile shows proper dependency resolution with Next 16-specific packages (sharp, baseline-browser-mapping, updated SWC binaries)
- No application code or workflow changes
- CI workflow includes
bun run buildwhich will validate the upgrade
The changes align with the stated goals and preservation guarantees. Ready to merge once CI passes.
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Summary
nextfrom^14.2to^16.2.4(resolves to 16.2.6)@policyengine/ui-kitfrom^0.8.0to^0.9.0(picks up types-resolution fix and/legacycolors.blue/successrestoration)turbopack.roottonext.config.js(silences stray-lockfile warning when building from non-repo dirs)React 19.2.x and Tailwind 4.x were already in place; no changes needed there.
Preservation guarantees
output: "export"andimages.unoptimizedretained — static export toout/workspublic/data/*.csvoutputs from the Python pipeline pass through unchanged/,/_not-found) prerender as static contentTest plan
bun installcleanbun run buildsucceeds with Turbopack on Next 16.2.6index.html,404.html,data/*.csv,robots.txt,sitemap.xmlReplaces the stale #1 (closed today). Branch name is
upgrade-next-16— the previous attempt'supgrade-next-16-tw4suffix isn't relevant since Tailwind isn't being touched.🤖 Generated with Claude Code