types-format

Check that types conditions use the correct .d.mts/.d.cts extensions for dual packages

Property	Value
Rule ID	exports/types-format
Category	exports
Severity	🟡 warning
Fixable	No

What it Checks

In dual ESM/CJS packages, TypeScript expects .d.mts for ESM types and .d.cts for CJS types. Using .d.ts for both can cause resolution issues.

Configuration

Disable this rule:

tspub check --ignore-rules "exports/types-format"

Or in tspub.config.ts:

export default {
  check: {
    severityOverrides: {
      "exports/types-format": "off",  // or "warning", "error", "info"
    },
  },
};