`emitDtsOnly` breaks transitive module traversal, so dependent files may not emit `.d.ts`

[rzzf]

Reproduction link or steps

https://github.com/rzzf/dts-repro

Describe the bug

When rolldown-plugin-dts is used with Rolldown and emitDtsOnly: true, the plugin replaces transformed source modules with an empty stub:

export {}

This makes Rolldown stop traversing transitive dependencies from that module.

As a result, a simple chain like:

index.ts -> a.ts -> b.ts

can produce declarations only for index.ts and a.ts, while b.ts is omitted, even though a.ts imports b.ts.

In contrast, unplugin-dts emits all three declaration files in the same repro.

Actual output

Generated:

• index.d.ts
• a.d.ts

Missing:

• b.d.ts

In a medium-to-large project, there are roughly 1,000 .ts / .tsx / .vue source files matching the full-input pattern. If all of them are passed to Rolldown as input, rolldown-plugin-dts becomes significantly slower and the DTS build time grows substantially.

Are there any other ways to solve this issue besides adding these files to the input?

System Info

System:
    OS: macOS 15.7.3
    CPU: (10) arm64 Apple M4
    Memory: 88.08 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 24.14.0 - /usr/local/bin/node
    npm: 11.9.0 - /usr/local/bin/npm
    pnpm: 10.28.2 - /usr/local/bin/pnpm
  Browsers:
    Chrome: 147.0.7727.117
    Safari: 18.6

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• The provided reproduction is a minimal reproducible of the bug.

Contributions

• I am willing to submit a PR to fix this issue
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Compensating engineering work will speed up resolution and support the project

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