Sourced from tsdown's releases.

v0.23.0

   🧭 Migration Guide

Most users can upgrade directly. Before upgrading, run one final build with tsdown@0.22.14 and resolve all deprecation warnings.

• config:
  • bundle: false → unbundle: true; bundle: true can be removed
  • outExtension → outExtensions
  • publicDir / --public-dir → copy / --copy
  • removeNodeProtocol: true → nodeProtocol: 'strip'
  • injectStyle → css.inject
• deps:
  • inlineOnly / deps.onlyAllowBundle → deps.onlyBundle
  • skipNodeModulesBundle: true → deps.neverBundle: true
  • resolveDepSubpath now defaults to false; set it to true to preserve the previous behavior
• dts:
  • rolldown-plugin-dts was upgraded from 0.27.13 to 0.28.5
  • dts.oxc: true → dts.generator: 'oxc'
  • dts.tsgo: true → dts.generator: 'tsgo'; oxc and tsgo objects now only configure their respective generators
  • dts.volarPlugins → dts.customLanguages; rename each language's create hook to createVolarPlugins
  • Custom languages, including vue, now throw when combined with an incompatible generator
  • dts.cjsReexport was removed; dual-format builds now generate CJS declarations in a separate pass
• attw:
  • The default profile changed from strict to esm-only; set profile: 'strict' to preserve the previous checks
• programmatic API:
  • build() now returns { bundles, watch }; replace const bundles = await build() with const { bundles } = await build()
• requirements:
  • Node.js 25 is no longer supported; use ^22.18.0, ^24.11.0, or >=26.0.0
  • rolldown-plugin-dts now requires Rolldown 1.2.x
  • Legacy types and typesVersions fallbacks were removed; use TypeScript's bundler, node16, or nodenext module resolution

   🚨 Breaking Changes

• Drop support for Node.js 25  -  by @​sxzz (26950)
• Remove deprecated tsup compatibility options  -  by @​sxzz (50766)
• Drop types and typesVersionsfields  -  by @​sxzz (be3ea)
• attw:
  • Change default profile to esm-only  -  by @​sxzz (9b3cf)
• deps:
  • Remove deprecated deps.onlyAllowBundle  -  by @​sxzz (30c55)
  • Disable resolveDepSubpath by default  -  by @​sxzz (d300f)
  • Remove deprecated skipNodeModulesBundle  -  by @​sxzz (f2a3d)
• dts:
  • Remove dts.cjsReexport option  -  by @​sxzz (9c70f)
  • Make dts.generator the only way to select generator  -  by @​sxzz (eb75f)

   🚀 Features

• Expose programmatic watch controls  -  by @​sxzz in rolldown/tsdown#1062 (96a40)
• css: Support function form for css.modules.localsConvention  -  by @​sxzz and @​lazerg (b566f)

... (truncated)

• ced9a2c chore: release v0.23.0
• f5f9ea9 docs: add Ember support guide (#1043)
• 8ac89dc chore: upgrade Vitest to v5
• 96a4098 feat: expose programmatic watch controls (#1062)
• 61718d7 chore: upgrade deps
• d04119c chore: upgrade deps
• 55f89c5 chore(deps): update pnpm to v12.1.0 (#1060)
• 946224d fix: ignore optional dependencies in type definitions
• 62f01cd chore: release v0.23.0-rc.1
• bf53f43 fix(cli): camel-case nested flag keys
• Additional commits viewable in compare view

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