Update JsonSchema usage

[pushpak1300]

This PR updates the codebase to rely on the JsonSchema contract interface instead of the concrete implementation class. This improves the autocompletion.

Caution

Warning: Breaking Change

Tool implementations that explicitly type hint Illuminate\JsonSchema\JsonSchema in their schema() or outputSchema() methods must update to use the contract interface Illuminate\Contracts\JsonSchema\JsonSchema.

Migration Guide

// Before
use Illuminate\JsonSchema\JsonSchema;

public function schema(JsonSchema $schema): array
{
   //
}

// After
use Illuminate\Contracts\JsonSchema\JsonSchema;

public function schema(JsonSchema $schema): array
{
   //
}

This affects only custom tool classes that override the schema methods. The update is minimal, limited to changing the import to the contract interface.

[alankpax]

Hi @pushpak1300 , I have just tried to upgrade the package like this

composer require laravel/mcp:0.4.1

on an existing project wich was using Laravel framework in version 12.37

"laravel/framework": "^12.37",

I have come with the issue that Illuminate\Contracts\JsonSchema\JsonSchema is not found on my existing tools.

Shouldn't this PR adds a minimal version of Laravel 12 since this contract looked to be added on a very recent minimal version ?

use Illuminate\Contracts\JsonSchema\JsonSchema;

[pushpak1300]

@alankpax you're right i think we should do that but for this specific issue you can just run composer update and this will be solve.