[JiangYueYun]

AI usage

• No AI was used in this PR.
• AI was used: DeepSeek Harness (deepseek-v4-pro)
  • I have carefully reviewed the AI-generated content myself.

Description

workspace.include is a list of glob patterns, expanded with onlyDirectories: true, so a directory
that is not a package — a directory left behind by a package rename, for example — becomes a
workspace entry. It has no config of its own, so it inherits the root config's entry and name,
and the build then fails with [root-name] Cannot find entry: [...]: the message names the root
package and carries no path.

This brings the include branch in line with auto, which discovers **/package.json and so never
matches a non-package: directories matched by the globs that own no package.json are skipped, and
reported instead of being passed over quietly.

WARN  workspace include matched 2 directories without a package.json; skipping: packages/a, packages/b

Source report

Reproduced from a real monorepo: deepseek-ai/deepseek-harness discussion #6089
(deepseek-ai/deepseek-harness#6089). pnpm run build:lib:host fails
with [@deepseek-ai/dsh-root] Cannot find entry: ["lib/types/{index,invariant,startup}.js"] on a tree
that holds a directory without a package.json under packages/*/*, while a clean checkout of the
same revision builds 249 packages without a root lib/types.

Linked Issues

Refs #1067. #1068 covers the other half — naming the offending directory in the error message; this
covers "a directory that is not a package must not join the workspace".

Tests

tests/e2e.test.ts gains a workspace whose include glob matches one real package and one directory
holding only .gitkeep: it fails on main (Build failed with 1 error) and passes with the change,
together with its snapshot. eslint --max-warnings 0 and tsc --noEmit are clean on the touched
files.

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tsdown

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commit: fb432d4

[JiangYueYun]

Closing this: #1067 already carries the diagnosis, which I hit independently while building a monorepo, and #1068 covers the error-message side. The implementation here is yours to take, rewrite, or drop — I won't be iterating on the patch.