ESLint version

8.57.0

What problem do you want to solve?

Right now, nothing in ESLint core stops inline configs (configuration comments) from redundantly repeating the same configuration option and/or severity as already exists. This is similar to unused disable directives: they take up space and can be misleading.

• Playground of an inline config setting the same severity as the config file
• Playground of an inline config setting the same options as the config file

What do you think is the correct solution?

The most straightforward change I can think of would be to add a new --report-unused-inline-configs / reportUnusedInlineConfigs (per the feature's primary naming in #18187) or --report-unused-config-comments / reportUnusedConfigComments (per the common alternate naming).

Participation

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

Additional comments

Inspired by #18218, thanks @inga-lovinde 😄

Edit: eslint/rfcs#121 was filed and accepted for this.