vitest-5-0-0-14-b

Question

Do I need extends: true for each inline project to pick up my root Vitest settings?

Answer key

A correct answer says

Inline projects in `test.projects` inherit the root config by default.

The stale answer

Inline projects do not inherit the root config unless you set `extends: true`.

The change's lesson

Answer

No. On the vitest 5.0.3 this project installs, you don't need `extends: true`. Inline project configurations inherit options from the root-level config by default, so adding it to each project changes nothing.

That's different from Vitest 3.x/4.x, where inline projects did not inherit root settings unless you set `extends: true`. Config written for those versions still works on 5.x, and the flag is now just redundant. If you want a project to *not* inherit root settings, you'd now opt out explicitly, presumably with `extends: false`.

I'm getting the 5.0 default change from this project's `.ludion/lessons.md` note, which says it was test-verified. I haven't checked it against the installed vitest source.

Answering cost $0.07.

Grade

correct

The judge's reason: It states inline projects inherit the root config by default in Vitest 5, and mentions the extends: true requirement only as past 3.x/4.x behavior.

The judge's log

Session log

What the agent wrote, the tools it called, and what they returned, from docs/bench/2026-10-11-done3/runs/B-project-sync/vitest-5-0-0-14-b.jsonl. Thinking and the session's settings are left out. The raw log

1. Agent

   No. On the vitest 5.0.3 this project installs, you don't need `extends: true`. Inline project configurations inherit options from the root-level config by default, so adding it to each project changes nothing.
   
   That's different from Vitest 3.x/4.x, where inline projects did not inherit root settings unless you set `extends: true`. Config written for those versions still works on 5.x, and the flag is now just redundant. If you want a project to *not* inherit root settings, you'd now opt out explicitly, presumably with `extends: false`.
   
   I'm getting the 5.0 default change from this project's `.ludion/lessons.md` note, which says it was test-verified. I haven't checked it against the installed vitest source.