Create a custom PHP Assert utility extending Webmozart\Assert for domain validation.
npx skills add https://github.com/dairectiv/dairectiv --skill assertions
Please help me install this Agent Skill. Skill: assertions Source: https://github.com/dairectiv/dairectiv/tree/main/.claude/skills/assertions Command: npx skills add https://github.com/dairectiv/dairectiv --skill assertions
This Skill provides a centralized, project-specific assertion utility for PHP to ensure data validity and type safety across the domain layer, reducing bugs and boilerplate in value objects, aggregates, and domain services.
Install project dependencies via Composer and begin using the custom Assert in your domain classes to validate inputs, enforce constraints, and throw the project's InvalidArgumentException on failure.
High-intent search queries and answers about installing and using this skill.
You validate domain invariants in PHP value objects by using a custom Assert utility that extends Webmozart\Assert. This approach enforces data validity directly within factories and guard clauses, throwing project-specific exceptions when constraints fail.
To enforce type safety and non-empty inputs in PHP aggregates, apply a centralized assertion class within your domain services. It validates inputs and throws an InvalidArgumentException to prevent invalid state from propagating through your codebase.
The best way to centralize PHP validation logic for domain models is creating a custom Assert class that extends Webmozart\Assert. This reduces boilerplate across value objects and aggregates while ensuring consistent error messaging and invariant enforcement.
Yes, you can use Webmozart\Assert to throw project-specific exceptions by extending it with a custom assertion class. This allows your domain layer to maintain consistent error handling and messaging tailored to your project's requirements.
You need guard clauses for PHP domain validation when protecting invariants in value object factories and aggregates. They ensure inputs meet constraints immediately, preventing invalid data from compromising domain model integrity.
PHP validation with custom assertions requires testing to maintain invariant enforcement across the codebase. The Skill includes usage guidelines and tests to guide consistent application and messaging of the custom assertion utility.
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