peptide-geo-monitor v0.1.0: internal AI-visibility dashboard (#1)

New internal plugin: weekly LLM probes of core peptides (Perplexity sonar + GPT/Gemini-search via OpenRouter/CF gateway) -> custom table -> wp-admin trendline + standings. Provider interface + cost ledger w/ hard $5/mo cap + collector/panel seam (AI-visibility only). v1 = AI-visibility only.

QA: APPROVE-WITH-P2-NOTES — qa-reviews/peptide-geo-monitor/2026-06-13-f488f4a966cbb9e771d3abc20daee3fa49074520.md (P2 follow-ups: ltrim www display bug, PHPCS mandatory, dead cache)

Agent-Session: geomonitor v0.1.0 merge

includes/core/class-pgm-autoloader.php

@@ -0,0 +1,69 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Class and interface autoloader for the Peptide GEO Monitor plugin.
+ *
+ * Converts PGM_* class/interface names to file paths under includes/.
+ * Naming conventions:
+ *   PGM_Foo_Bar (class)      → class-pgm-foo-bar.php
+ *   PGM_Foo_Bar (interface)  → interface-pgm-foo-bar.php (tried second)
+ *
+ * Who triggers: Plugin boot (peptide-geo-monitor.php) — called once before
+ *               any PGM_* class or interface is instantiated.
+ * Dependencies: None (pure PHP).
+ *
+ * @package PeptideGeoMonitor
+ */
+class PGM_Autoloader {
+
+	/**
+	 * Register the autoloader with the SPL stack.
+	 *
+	 * @return void
+	 */
+	public static function register(): void {
+		spl_autoload_register( array( static::class, 'load' ) );
+	}
+
+	/**
+	 * Attempt to load a PGM_* class or interface file.
+	 *
+	 * Walks the known include subdirectories in order, trying the class-
+	 * filename first and the interface-filename second.
+	 *
+	 * Side effects: require_once on a matching file.
+	 *
+	 * @param string $class_name Fully-qualified class or interface name.
+	 *
+	 * @return void
+	 */
+	public static function load( string $class_name ): void {
+		if ( 0 !== strpos( $class_name, 'PGM_' ) ) {
+			return;
+		}
+
+		$slug = strtolower( str_replace( '_', '-', $class_name ) );
+
+		$search_dirs = array(
+			PGM_PLUGIN_DIR . 'includes/core/',
+			PGM_PLUGIN_DIR . 'includes/providers/',
+			PGM_PLUGIN_DIR . 'includes/collector/',
+			PGM_PLUGIN_DIR . 'includes/panel/',
+			PGM_PLUGIN_DIR . 'includes/',
+		);
+
+		// Try class file first, then interface file.
+		$candidates = array( 'class-' . $slug . '.php', 'interface-' . $slug . '.php' );
+
+		foreach ( $search_dirs as $dir ) {
+			foreach ( $candidates as $file ) {
+				$path = $dir . $file;
+				if ( file_exists( $path ) ) {
+					require_once $path;
+					return;
+				}
+			}
+		}
+	}
+}