feat: multi-provider OAuth pool — OpenAI, Cursor Pro, Google AI Pro (#22)

.gitignore

@@ -5,3 +5,8 @@ node_modules/
 .agents/loop-state/
 
 .aidevops.json
+
+# Local-only smoke tests / dev scratch — never ship: contains personal
+# paths, hardcoded admin passwords, and developer-host URLs.
+/wp-*-test.mjs
+/wp-*-test.js

inc/provider-registration.php

@@ -18,38 +18,52 @@
 
 use WordPress\AiClient\AiClient;
 use AnthropicMaxAiProvider\Authentication\AnthropicOAuthRequestAuthentication;
+use AnthropicMaxAiProvider\Authentication\ChatGptCodexOAuthRequestAuthentication;
 use AnthropicMaxAiProvider\OAuthPool\PoolManager;
+use AnthropicMaxAiProvider\OAuthPool\PoolRegistry;
 use AnthropicMaxAiProvider\Provider\AnthropicMaxProvider;
+use AnthropicMaxAiProvider\Provider\ChatGptCodexProvider;
 
 /**
- * Registers the Anthropic Max provider with the AI Client on init.
+ * Registers all available OAuth-backed AI providers with the AI Client on init.
  *
- * Runs at priority 5 so the provider is available before most plugins
- * act on `init` at the default priority of 10.
+ * Runs at priority 5 so providers are available before most plugins
+ * act on `init` at the default priority of 10. Each provider is only
+ * registered when its underlying account pool has at least one entry,
+ * so an empty pool leaves the WordPress AiClient registry untouched.
  */
 function register_provider(): void {
 	if ( ! class_exists( AiClient::class ) ) {
 		return;
 	}
 
-	$pool = PoolManager::getInstance();
-
-	// Only register if there are accounts in the pool.
-	if ( $pool->count() === 0 ) {
-		return;
-	}
-
 	$registry = AiClient::defaultRegistry();
 
-	if ( $registry->hasProvider( AnthropicMaxProvider::class ) ) {
-		return;
+	// --- Anthropic Max (Claude via Max subscription OAuth) ---
+	$anthropic_pool = PoolManager::getInstance();
+	if ( $anthropic_pool->count() > 0
+		&& ! $registry->hasProvider( AnthropicMaxProvider::class )
+	) {
+		$registry->registerProvider( AnthropicMaxProvider::class );
+		$registry->setProviderRequestAuthentication(
+			AnthropicMaxProvider::class,
+			new AnthropicOAuthRequestAuthentication( $anthropic_pool )
+		);
 	}
 
-	$registry->registerProvider( AnthropicMaxProvider::class );
-
-	// Inject the OAuth authentication using the pool manager.
-	$registry->setProviderRequestAuthentication(
-		AnthropicMaxProvider::class,
-		new AnthropicOAuthRequestAuthentication( $pool )
-	);
+	// --- ChatGPT Codex (OpenAI ChatGPT Plus/Pro/Team OAuth → Codex backend) ---
+	// Distinct provider id (`ultimate-ai-connector-chatgpt-codex`) because
+	// the OAuth token is rejected by `api.openai.com` and only works
+	// against `chatgpt.com/backend-api/codex/responses`. See
+	// ChatGptCodexProvider class docblock for the live-test evidence.
+	$openai_pool = PoolRegistry::pool( 'openai' );
+	if ( $openai_pool->count() > 0
+		&& ! $registry->hasProvider( ChatGptCodexProvider::class )
+	) {
+		$registry->registerProvider( ChatGptCodexProvider::class );
+		$registry->setProviderRequestAuthentication(
+			ChatGptCodexProvider::class,
+			new ChatGptCodexOAuthRequestAuthentication( $openai_pool )
+		);
+	}
 }