Code Quality Architecture: Locking Standards with Linter Rules & Git Hooks

The Cost of Tech Debt#

In rapid product development cycles, code quality and strict formatting standards are often bypassed in favor of raw feature speed. Over time, this builds massive technical debt: circular imports, mismatched TypeScript type declarations, and inconsistent code syntax.

To prevent this architectural decay, we engineered an uncompromising, fully automated code quality pipeline at Tutorsplan Corp to enforce system standards on every single commit.

Designing an Uncompromising ESLint Schema#

We configure our linter to aggressively block common sources of production bugs, such as synchronous setState calls in useEffect, unused variables, and improper React dependency listings.

Here is an extract from a production-ready ESLint configuration:

{
  "extends": [
    "next/core-web-vitals",
    "eslint:recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "rules": {
    "no-console": ["warn", { "allow": ["warn", "error"] }],
    "react-hooks/rules-of-hooks": "error",
    "react-hooks/exhaustive-deps": "warn",
    "@typescript-eslint/no-explicit-any": "error",
    "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
    "no-duplicate-imports": "error"
  }
}

Gating Git Commits with Husky and Lint-Staged#

Relying on developers to manually run linters before pushing to GitHub is a losing battle. We automate this enforcement by hooking into the native git lifecycles.

Using Husky and lint-staged, we ensure that only properly formatted, lint-passed code can ever be committed:

// package.json
"lint-staged": {
  "*.{js,jsx,ts,tsx}": [
    "eslint --fix",
    "prettier --write"
  ]
}

Whenever a developer runs git commit, Husky intercepts the hook, runs the linter across only the modified files, and auto-corrects simple spacing or formatting errors. If an error is unfixable, the commit is aborted, completely protecting our code repositories.