Initial commit: claude-api skill

php/claude-api.md

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+# Claude API — PHP
+
+> **Note:** The PHP SDK is the official Anthropic SDK for PHP. Tool runner and Agent SDK are not available. Bedrock, Vertex AI, and Foundry clients are supported.
+
+## Installation
+
+```bash
+composer require "anthropic-ai/sdk"
+```
+
+## Client Initialization
+
+```php
+use Anthropic\Client;
+
+// Using API key from environment variable
+$client = new Client(apiKey: getenv("ANTHROPIC_API_KEY"));
+```
+
+### Amazon Bedrock
+
+```php
+use Anthropic\BedrockClient;
+
+$client = new BedrockClient(
+    region: 'us-east-1',
+);
+```
+
+### Google Vertex AI
+
+```php
+use Anthropic\VertexClient;
+
+$client = new VertexClient(
+    region: 'us-east5',
+    projectId: 'my-project-id',
+);
+```
+
+### Anthropic Foundry
+
+```php
+use Anthropic\FoundryClient;
+
+$client = new FoundryClient(
+    authToken: getenv("ANTHROPIC_AUTH_TOKEN"),
+);
+```
+
+---
+
+## Basic Message Request
+
+```php
+$message = $client->messages->create(
+    model: 'claude-opus-4-6',
+    maxTokens: 1024,
+    messages: [
+        ['role' => 'user', 'content' => 'What is the capital of France?'],
+    ],
+);
+echo $message->content[0]->text;
+```
+
+---
+
+## Streaming
+
+```php
+$stream = $client->messages->createStream(
+    model: 'claude-opus-4-6',
+    maxTokens: 1024,
+    messages: [
+        ['role' => 'user', 'content' => 'Write a haiku'],
+    ],
+);
+
+foreach ($stream as $event) {
+    echo $event;
+}
+```
+
+---
+
+## Tool Use (Manual Loop)
+
+The PHP SDK supports raw tool definitions via JSON schema. See the [shared tool use concepts](../shared/tool-use-concepts.md) for the tool definition format and agentic loop pattern.