What I Check When Taking Over an Existing Laravel Application

Taking over an existing Laravel application is very different from building a new project from scratch. In a new project, you can define the rules, structure, and workflow yourself. In an existing application, you first step into decisions that were made before you arrived. Some were sensible, some were made under pressure, and some may still be in the code simply because there was never time to clean them up.

That is why I do not start a takeover by rewriting code. I first need to understand what the application does, how it is operated, and where the biggest risks are. A good audit is not a hunt for mistakes. It is a way to map the project and decide what must be fixed immediately, what can wait, and what is merely a different style rather than a real problem.

First run and basic orientation

I start with the simplest question: can the application be started by following the instructions in the repository? If the README is missing, outdated, or does not describe local setup, that is the first sign that the project may be difficult to hand over. This is not just developer comfort. If an application cannot be run locally or in staging quickly, every future change becomes slower and riskier.

• I check PHP, Laravel, Node.js, and database versions.

• I review .env.example, Docker or Sail setup, and local setup documentation.

• I verify whether migrations, seeders, and basic tests work.

• I write down missing or unclear setup steps.

Dependencies and framework state

The next layer is dependency health. I want to know which Laravel version the application uses, whether its packages are actively maintained, and whether abandoned libraries are present. An older framework version is not automatically a problem, but it is important to understand the cost of a safe upgrade.

With Composer and NPM, I care not only about the number of available updates but also about the type of risk. Some packages are small helpers, while others sit at the core of authentication, administration, payments, or queues. The closer a package is to security and data, the more attention it deserves.

Architecture and responsibility boundaries

Then comes reading the code. I am not looking for perfect architecture. I am looking for responsibility boundaries. I want to know whether domain rules are reasonably separated from controllers, whether Form Requests actually validate input, whether models are overloaded, and whether business logic is spread across ten places without a clear reason.

• Where do side effects happen: emails, notifications, synchronizations, payments?

• Are critical actions protected by policies or another authorization mechanism?

• Do services, actions, or jobs give the system a readable structure?

• Can I tell what is a domain rule and what is only technical implementation?

Database and data quality

The database often reveals more about a project than the code itself. I check migrations, indexes, foreign keys, unique constraints, and table and column names. I also want to know whether the database matches what the application assumes in its models. If the code expects a relationship that the database does not protect, that is a potential source of silent errors.

In an existing application, real data matters. Empty values where they should not exist, duplicate records, or historically incorrect states can affect any refactor. Before changing code, I need to know how far production reality is from the ideal model.

Tests, static analysis, and change quality

If the project has tests, I check what they actually protect. The coverage number itself matters less than whether critical business scenarios are covered. I care about login, permissions, payments, orders, important forms, imports, exports, and integrations. A test that verifies a trivial detail is less helpful during a takeover than a test around a key flow.

• I run the test suite and watch speed, stability, and failure types.

• I check Pint, Larastan/PHPStan, and possibly Rector.

• I look for CI and whether it runs before changes are merged.

• I separate issues that block work from issues that can be improved gradually.

Deployment, operations, and rollback

Code is only one part of the application. It is equally important to understand how the project is deployed and operated. I look at the server, PHP processes, queue workers, scheduler, storage, cache, logs, backups, and rollback plan. An application may have acceptable code, but if deployment is manual and undocumented, every change becomes unnecessarily stressful.

At the end of a takeover, there should be a simple list of priorities. What is a critical security risk? What blocks ordinary development? What increases the cost of every future change? And what is technical debt that can be handled gradually? Without that distinction, an audit easily becomes an endless list of complaints. The point is not to criticize the past. The point is to regain control over the future of the project.