feat(linkedin-thought-leadership): v1.1.0 — Q2 2026 feature release

9 improvements across 3 tracks:

Onboarding: /linkedin:onboarding wizard, README Quick Start rewrite
Content Quality: voice drift scoring, industry angle variants,
  /linkedin:carousel, /linkedin:react multi-URL comparison
Analytics: automated week-rollover, day-of-week heatmap,
  month-over-month reports

25→27 commands. All Q2 ROADMAP items completed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/linkedin-thought-leadership/scripts/analytics/src/utils/storage.ts

@@ -1,7 +1,7 @@
 import { readFileSync, writeFileSync, readdirSync, existsSync, mkdirSync } from "node:fs";
 import { join, resolve, dirname } from "node:path";
 import { fileURLToPath } from "node:url";
-import type { AnalyticsBatch, WeeklyReport, PostAnalytics } from "../models/types.js";
+import type { AnalyticsBatch, WeeklyReport, MonthlyReport, PostAnalytics } from "../models/types.js";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
@@ -25,7 +25,7 @@ export function getAnalyticsRoot(): string {
  * Ensure required subdirectories exist under analytics root
  */
 export function ensureDirectories(root: string): void {
-  const directories = ["exports", "posts", "weekly-reports"];
+  const directories = ["exports", "posts", "weekly-reports", "monthly-reports"];
 
   if (!existsSync(root)) {
     mkdirSync(root, { recursive: true });
@@ -252,3 +252,39 @@ export function loadAllWeeklyReports(root: string): WeeklyReport[] {
     b.week.localeCompare(a.week)
   );
 }
+
+/**
+ * Sanitize month string to only allow YYYY-MM format
+ */
+function sanitizeMonth(month: string): string {
+  if (!/^\d{4}-\d{2}$/.test(month)) {
+    throw new Error(`Invalid month format: ${month}. Expected YYYY-MM`);
+  }
+  return month;
+}
+
+/**
+ * Save a monthly report to disk
+ */
+export function saveMonthlyReport(root: string, report: MonthlyReport): string {
+  ensureDirectories(root);
+  const reportsDir = join(root, "monthly-reports");
+  const month = sanitizeMonth(report.month);
+  const filename = `${month}.json`;
+  const filepath = join(reportsDir, filename);
+  verifyPathWithinDirectory(filepath, reportsDir);
+  writeFileSync(filepath, JSON.stringify(report, null, 2), "utf-8");
+  return filename;
+}
+
+/**
+ * Load a specific monthly report by month identifier
+ */
+export function loadMonthlyReport(root: string, month: string): MonthlyReport | null {
+  month = sanitizeMonth(month);
+  const reportsDir = join(root, "monthly-reports");
+  const filepath = join(reportsDir, `${month}.json`);
+  if (!existsSync(filepath)) return null;
+  const content = readFileSync(filepath, "utf-8");
+  return JSON.parse(content) as MonthlyReport;
+}