Merge pull request #19 from mslinnea/anthropic-api-images

Remove prefix from base64 inline image data for Anthropic AI integration

includes/Anthropic/Anthropic_AI_Model.php

@@ -430,7 +430,12 @@ private static function get_content_transformers(): array {
 							'source' => array(
 								'type'       => 'base64',
 								'media_type' => $mime_type,
-								'data'       => $part->get_base64_data(),
+								// The Anthropic AI API expects inlineData blobs to be without the prefix.
+								'data'       => preg_replace(
+									'/^data:[a-z]+\/[a-z]+;base64,/',
+									'',
+									$part->get_base64_data()
+								),
 							),
 						);
 					} else {