beyondcode / claude-hooks-sdk
A PHP SDK for building Claude Code hooks.
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beyondcode
Requires
- php: ^8.3
Requires (Dev)
- laravel/pint: ^1.0
- pestphp/pest: ^3.0
This package is auto-updated.
Last update: 2025-07-03 20:18:14 UTC
README
A Laravel-inspired PHP SDK for building Claude Code hook responses with a clean, fluent API. This SDK makes it easy to create structured JSON responses for Claude Code hooks using an expressive, chainable interface.
Claude Code hooks are user-defined shell commands that execute at specific points in Claude Code's lifecycle, providing deterministic control over its behavior. For more details, see the Claude Code Hooks documentation.
Installation
You can install the package via composer:
composer require beyondcode/claude-hooks-sdk
Usage
Creating a Claude Hook
Here's how to create a PHP script that Claude Code can use as a hook:
Step 1: Create your PHP hook script
Create a new PHP file (e.g., validate-code.php
) using the SDK:
<?php require 'vendor/autoload.php'; use BeyondCode\ClaudeHooks\ClaudeHook; // Read the hook data from stdin. // This will automatically return the correct Hook instance (for example PreToolUse) $hook = ClaudeHook::create(); // Example: Validate bash commands if ($hook->toolName() === 'Bash') { $command = $hook->toolInput('command', ''); // Check for potentially dangerous commands if (str_contains($command, 'rm -rf')) { // Block the tool call with feedback $hook->response()->block('Dangerous command detected. Use caution with rm -rf commands.'); } } // Allow other tool calls to proceed $hook->success();
Step 2: Register your hook in Claude Code
- Run the
/hooks
command in Claude Code - Select the
PreToolUse
hook event (runs before tool execution) - Add a matcher (e.g.,
Bash
to match shell commands) - Add your hook command:
php /path/to/your/validate-code.php
- Save to user or project settings
Your hook is now active and will validate commands before Claude Code executes them!
Hook Types and Methods
The SDK automatically creates the appropriate hook type based on the input:
use BeyondCode\ClaudeHooks\ClaudeHook; use BeyondCode\ClaudeHooks\Hooks\{PreToolUse, PostToolUse, Notification, Stop, SubagentStop}; $hook = ClaudeHook::create(); if ($hook instanceof PreToolUse) { $toolName = $hook->toolName(); // e.g., "Bash", "Write", "Edit" $toolInput = $hook->toolInput(); // Full input array $filePath = $hook->toolInput('file_path'); // Specific input value } if ($hook instanceof PostToolUse) { $toolResponse = $hook->toolResponse(); // Full response array $success = $hook->toolResponse('success', true); // With default value } if ($hook instanceof Notification) { $message = $hook->message(); $title = $hook->title(); } if ($hook instanceof Stop || $hook instanceof SubagentStop) { $isActive = $hook->stopHookActive(); }
Response Methods
All hooks provide a fluent response API:
// Continue processing (default behavior) $hook->response()->continue(); // Stop Claude from continuing with a reason $hook->response()->stop('Reason for stopping'); // For PreToolUse: approve or block tool calls $hook->response()->approve('Optional approval message')->continue(); $hook->response()->block('Required reason for blocking')->continue(); // Suppress output from transcript mode $hook->response()->suppressOutput()->continue();
Example Hooks
Code Formatter Hook
Automatically format PHP files after edits:
<?php require 'vendor/autoload.php'; use BeyondCode\ClaudeHooks\ClaudeHook; use BeyondCode\ClaudeHooks\Hooks\PostToolUse; $hook = ClaudeHook::create(); $filePath = $hook->toolInput('file_path', ''); if (str_ends_with($filePath, '.php')) { exec("php-cs-fixer fix $filePath", $output, $exitCode); if ($exitCode !== 0) { $hook->response() ->suppressOutput() ->merge(['error' => 'Formatting failed']) ->continue(); } }
Security Validator Hook
Prevent modifications to sensitive files:
#!/usr/bin/env php <?php require 'vendor/autoload.php'; use BeyondCode\ClaudeHooks\ClaudeHook; use BeyondCode\ClaudeHooks\Hooks\PreToolUse; $hook = ClaudeHook::fromStdin(file_get_contents('php://stdin')); if ($hook instanceof PreToolUse) { // Check file-modifying tools if (in_array($hook->toolName(), ['Write', 'Edit', 'MultiEdit'])) { $filePath = $hook->toolInput('file_path', ''); $sensitivePatterns = [ '.env', 'config/database.php', 'storage/oauth-private.key', ]; foreach ($sensitivePatterns as $pattern) { if (str_contains($filePath, $pattern)) { $hook->response()->block("Cannot modify sensitive file: $filePath"); } } } } // Allow all other operations $hook->response()->continue();
Notification Handler Hook
Custom notification handling:
<?php require 'vendor/autoload.php'; use BeyondCode\ClaudeHooks\ClaudeHook; use BeyondCode\ClaudeHooks\Hooks\Notification; $hook = ClaudeHook::create(); // Send to custom notification system $notificationData = [ 'title' => $hook->title(), 'message' => $hook->message(), 'session' => $hook->sessionId(), 'timestamp' => time() ]; // Send notification to Slack, Discord, etc. $hook->success();
Testing
composer test
Changelog
Please see CHANGELOG for more information on what has changed recently.
Security Vulnerabilities
Please review our security policy on how to report security vulnerabilities.
Credits
License
The MIT License (MIT). Please see License File for more information.