Which packages are affected?

• @eslint/compat
• @eslint/config-array
• @eslint/config-helpers
• @eslint/core
• @eslint/mcp
• @eslint/migrate-config
• @eslint/object-schema
• @eslint/plugin-kit

Environment

Node version: v24.14.0
npm version: v11.9.0
@eslint/object-schema: v3.0.3
Operating System:

What did you do?

import { ValidationStrategy } from "@eslint/object-schema";

ValidationStrategy.object([]);

What did you expect to happen?

I expected ValidationStrategy.object([]) to throw a TypeError.

Because ValidationStrategy exposes object() and array() as separate built-in validators, I expected object() not to treat arrays as valid input.

What actually happened?

No error was thrown.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/node-2s958zgk

Participation

• I am willing to submit a pull request for this issue.

AI acknowledgment

• I did not use AI to generate this issue report.
• (If the above is not checked) I have reviewed the AI-generated content before submitting.

Additional comments

If this behavior is intentional, the docs for the built-in object strategy may need to clarify that arrays are considered valid objects.