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-cron.php

@@ -0,0 +1,82 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * WP-Cron management for the weekly AI-visibility probe.
+ *
+ * Registers the pgm_weekly_probe hook, schedules/clears the event, and
+ * dispatches to PGM_Probe_Runner on each tick.
+ *
+ * Who triggers: PGM_Plugin::init() (hook registration), PGM_Activator
+ *               (schedule), PGM_Deactivator (clear).
+ * Dependencies: PGM_Probe_Runner.
+ *
+ * @see class-pgm-probe-runner.php — Runner invoked on each cron tick.
+ * @see class-pgm-activator.php    — Calls schedule_weekly() on activation.
+ * @package PeptideGeoMonitor
+ */
+class PGM_Cron {
+
+	/**
+	 * Register WordPress action hooks.
+	 *
+	 * Side effects: Adds action for PGM_CRON_HOOK.
+	 *
+	 * @return void
+	 */
+	public function register_hooks(): void {
+		add_action( PGM_CRON_HOOK, array( $this, 'handle_cron_tick' ) );
+	}
+
+	/**
+	 * Callback fired by WP-Cron on the weekly schedule.
+	 *
+	 * Side effects: Instantiates and runs PGM_Probe_Runner.
+	 *
+	 * @return void
+	 */
+	public function handle_cron_tick(): void {
+		$runner = new PGM_Probe_Runner();
+		$runner->run();
+	}
+
+	/**
+	 * Schedule the weekly cron event if not already scheduled.
+	 *
+	 * Safe to call on re-activation — no-op when already scheduled.
+	 *
+	 * Side effects: Adds a WP-Cron event.
+	 *
+	 * @return void
+	 */
+	public static function schedule_weekly(): void {
+		if ( ! wp_next_scheduled( PGM_CRON_HOOK ) ) {
+			wp_schedule_event( time(), 'weekly', PGM_CRON_HOOK );
+		}
+	}
+
+	/**
+	 * Remove the weekly cron schedule.
+	 *
+	 * Called on deactivation. Does not purge data.
+	 *
+	 * Side effects: Removes the WP-Cron event.
+	 *
+	 * @return void
+	 */
+	public static function clear_schedule(): void {
+		$timestamp = wp_next_scheduled( PGM_CRON_HOOK );
+		if ( false !== $timestamp ) {
+			wp_unschedule_event( $timestamp, PGM_CRON_HOOK );
+		}
+	}
+
+	/**
+	 * Check whether the weekly event is currently scheduled.
+	 *
+	 * @return bool
+	 */
+	public static function is_scheduled(): bool {
+		return false !== wp_next_scheduled( PGM_CRON_HOOK );
+	}
+}