Migrate build system from Vite to tsdown#25
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bartveneman merged 5 commits intomainfrom Mar 8, 2026
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- Add tsdown.config.js with dts and publint enabled - Remove vite.config.js, vite, vite-plugin-dts, @codecov/vite-plugin, publint deps - Update build script from `vite build` to `tsdown` - Remove lint-package script and lint-package CI job (publint now runs as part of build) - Update package.json exports/main/types to match tsdown default .mjs/.d.mts output https://claude.ai/code/session_01JJJhv1D5c6sE4e4L9AJZ5x
Replace @codecov/vite-plugin with @codecov/rollup-plugin in tsdown config. Restore CODECOV_TOKEN env var in the build CI step. https://claude.ai/code/session_01JJJhv1D5c6sE4e4L9AJZ5x
Resolves high severity rollup path traversal (GHSA-mw96-cpmx-2vgc) and moderate esbuild dev server issue (GHSA-67mh-4wv8-2f99). Remaining 3 moderate undici issues are unfixable upstream in @codecov/rollup-plugin's transitive deps. https://claude.ai/code/session_01JJJhv1D5c6sE4e4L9AJZ5x
Bundle ReportChanges will decrease total bundle size by 4.86kB (-52.79%) ⬇️. This is within the configured threshold ✅ Detailed changes
Affected Assets, Files, and Routes:view changes for bundle: cssLayerTree-esmAssets Changed:
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Summary
This PR migrates the project's build system from Vite to tsdown, simplifying the build configuration and tooling while maintaining the same output format and functionality.
Key Changes
vite.config.jsand all Vite-specific build setuptsdown.config.jswith integrated DTS generation, publint validation, and Codecov bundle analysisvite buildtotsdownin package.json./dist/css-layer-tree.jsto./dist/index.mjsand types from./dist/index.d.tsto./dist/index.d.mtsvite,vite-plugin-dts,@codecov/vite-plugin,publinttsdown,@codecov/rollup-pluginImplementation Details
https://claude.ai/code/session_01JJJhv1D5c6sE4e4L9AJZ5x