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-collector-registry.php

@@ -0,0 +1,112 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Registry: holds all registered collectors and panels.
+ *
+ * PGM_Plugin::init() registers the v1 AI-visibility collector + panel.
+ * Future collectors/panels call register_collector()/register_panel()
+ * without touching the dashboard shell.
+ *
+ * Who triggers: PGM_Plugin::init() on plugins_loaded.
+ * Dependencies: PGM_Data_Collector, PGM_Dashboard_Panel interfaces.
+ *
+ * @see interface-pgm-data-collector.php  — Collector contract.
+ * @see interface-pgm-dashboard-panel.php — Panel contract.
+ * @see class-pgm-plugin.php              — Calls register_* on boot.
+ * @see ARCHITECTURE.md                   — §Collector/Panel seam.
+ * @package PeptideGeoMonitor
+ */
+class PGM_Collector_Registry {
+
+	/**
+	 * Singleton instance.
+	 *
+	 * @var PGM_Collector_Registry|null
+	 */
+	private static ?PGM_Collector_Registry $instance = null;
+
+	/**
+	 * Registered collectors keyed by their collector key.
+	 *
+	 * @var array<string, PGM_Data_Collector>
+	 */
+	private array $collectors = array();
+
+	/**
+	 * Registered panels keyed by their panel key (matches collector key).
+	 *
+	 * @var array<string, PGM_Dashboard_Panel>
+	 */
+	private array $panels = array();
+
+	/**
+	 * Private constructor — use instance().
+	 */
+	private function __construct() {}
+
+	/**
+	 * Get (or create) the singleton instance.
+	 *
+	 * @return static
+	 */
+	public static function instance(): static {
+		if ( null === static::$instance ) {
+			static::$instance = new static();
+		}
+		return static::$instance;
+	}
+
+	/**
+	 * Register a data collector.
+	 *
+	 * @param PGM_Data_Collector $collector
+	 *
+	 * @return void
+	 */
+	public function register_collector( PGM_Data_Collector $collector ): void {
+		$this->collectors[ $collector->get_key() ] = $collector;
+	}
+
+	/**
+	 * Register a dashboard panel.
+	 *
+	 * @param string               $key   Panel key (must match a collector key).
+	 * @param PGM_Dashboard_Panel  $panel
+	 *
+	 * @return void
+	 */
+	public function register_panel( string $key, PGM_Dashboard_Panel $panel ): void {
+		$this->panels[ $key ] = $panel;
+	}
+
+	/**
+	 * Get all registered collectors.
+	 *
+	 * @return array<string, PGM_Data_Collector>
+	 */
+	public function get_collectors(): array {
+		return $this->collectors;
+	}
+
+	/**
+	 * Get the panel for a given key (null when not registered).
+	 *
+	 * @param string $key Panel key.
+	 *
+	 * @return PGM_Dashboard_Panel|null
+	 */
+	public function get_panel( string $key ): ?PGM_Dashboard_Panel {
+		return $this->panels[ $key ] ?? null;
+	}
+
+	/**
+	 * Reset the registry — test use only.
+	 *
+	 * @internal
+	 * @return void
+	 */
+	public static function reset_for_testing(): void {
+		static::$instance = null;
+	}
+}