diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 1062494..9f3b9bf 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "ms-ai-architect",
-  "version": "1.7.0",
+  "version": "1.8.0",
   "description": "Microsoft AI Solution Architect - structured architecture guidance for the full Microsoft AI stack",
   "author": {
     "name": "Kjell Tore Guttormsen"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac702fc..27449fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,28 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.8.0] - 2026-04-09
+
+### Added
+- Sitemap-based KB change detection system (`scripts/kb-update/`)
+  - `build-registry.mjs` — extracts 1342 unique URLs from 387 reference files
+  - `poll-sitemaps.mjs` — streams 18 Microsoft Learn sitemaps for `<lastmod>` changes
+  - `report-changes.mjs` — prioritized change report (critical/high/medium/low)
+  - `discover-new-urls.mjs` — finds relevant new MS Learn pages not yet covered
+  - `run-weekly-update.mjs` — weekly orchestrator with `--force`, `--discover`, `--dry-run`
+- Shared libraries: `url-normalize.mjs`, `sitemap-stream.mjs`, `registry-io.mjs` (zero npm deps)
+- Background poll trigger in session-start hook (auto-runs if >7 days since last check)
+
+### Changed
+- Session-start hook reads sitemap-based change report instead of broken mtime staleness check
+- `generate-skills --update` reads `change-report.json` for targeted MCP updates with `changed_urls`
+- KB maintenance section in README updated with automated freshness and auto-update info
+
+### Deprecated
+- `scripts/kb-staleness-check.sh` (mtime-based, unreliable after git clone — kept for backwards compat)
+
+---
+
 ## [1.7.0] - 2026-04-07
 
 ### Changed
diff --git a/README.md b/README.md
index a838885..fb160b4 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 > Your virtual Microsoft AI solution architect — meet **Cosmo Skyberg**.
 
-![Version](https://img.shields.io/badge/version-1.7.0-blue)
+![Version](https://img.shields.io/badge/version-1.8.0-blue)
 ![Platform](https://img.shields.io/badge/platform-Claude_Code_Plugin-purple)
 ![Docs](https://img.shields.io/badge/reference_docs-387-green)
 ![Agents](https://img.shields.io/badge/agents-12-orange)