Enforce a single, strict naming convention for TypeScript generic type parameters using ESLint, and migrate the rule to `error` after a short “warn” rollout. Rules: - Use `PascalCase` for type parameters. - Forbid leading/trailing underscores on type parameters. - Use a small allowlist-style regex (e.g., allow either `T` or a PascalCase identifier such as `TUser`, `TItem2`). - Start as `warn`, then switch to `error` once the codebase is compliant. Example ESLint config: ```js // .eslintrc.cjs module.exports = { rules: { '@typescript-eslint/naming-convention': [ 'error', // start as 'warn' for gradual rollout { selector: 'typeParameter', format: ['PascalCase'], leadingUnderscore: 'forbid', trailingUnderscore: 'forbid', custom: { regex: '^(T|T[A-Z][A-Za-z]+[0-9]*|[A-Z][a-zA-Z]+[0-9]*)$', match: true, }, }, ], }, } ``` Apply this to every generic type parameter (``, `` etc.) so the meaning of identifiers stays consistent and automatically enforced across the codebase.