no-vitest-coverage-temp-dir-in-repo-root

Disallow root-like test.coverage.reportsDirectory paths (for example . or ./).

Rule catalog ID: R052

Targeted pattern scope

• vitest.config.*
• vitest.workspace.*
• vite.config.* when Vitest coverage options are configured
• test.coverage.reportsDirectory

What this rule reports

This rule reports root-like reports directory values such as:

• "."
• "./"
• "\\"
• "/"

Why this rule exists

Writing coverage output into the repository root pollutes the workspace and increases accidental churn. A dedicated coverage subdirectory keeps artifacts isolated and predictable.

❌ Incorrect

import { defineConfig } from "vitest/config";

export default defineConfig({
    test: {
        coverage: {
            reportsDirectory: "./",
        },
    },
});

✅ Correct

import { defineConfig } from "vitest/config";

export default defineConfig({
    test: {
        coverage: {
            reportsDirectory: "coverage",
        },
    },
});

Behavior and migration notes

• this rule checks static string values only
• empty strings are handled by no-empty-vitest-coverage-reports-directory

ESLint flat config example

import vite from "@typpi/eslint-plugin-vite";

export default [vite.configs.strict, vite.configs.vitest];

When not to use it

Disable this rule only if your repository intentionally writes coverage artifacts directly to its root directory.

Package documentation

• Vitest config reference

Further reading

• require-vitest-coverage-reports-directory