diff --git a/CLAUDE.md b/CLAUDE.md
index 5f999ff..90afbd2 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -99,7 +99,7 @@ Single-module Python script. Logical layers in order:
 5. **Category system** — `identify_variant()` splits `.md` paths into `(base, category_code)`. A suffix is only treated as a category code if it appears in the declared code list.
 6. **Scanner** (`scan_and_categorize`) — walks a directory, skips drafts, returns records with the first 5000 chars of body for search indexing. Paths are relative to `site_root`.
 7. **Nav/search generators** — `generate_nav_yml()` emits a fixed-format YAML subset. `generate_search_json()` emits a JSON array. `merge_sections()` preserves existing section metadata on rebuild.
-8. **Core build** (`run_build`) — orchestrates the full build: version check → config read → scan → merge → write nav.yml and search.json.
+8. **Core build** (`run_build`) — orchestrates the full build: version check → config read → scan → merge → write nav.yml and search.json → patch `<title>` in `index.html` with `sitename` → generate PWA files if enabled. The `<title>` patch ensures crawlers and link-preview scrapers (WhatsApp, Slack, etc.) see the correct site name in the static HTML before any JavaScript runs.
 9. **Template download** (`download_template`) — fetches `app/` from GitHub via the Contents API using `urllib` + `certifi` for SSL. Recursively downloads files and directories.
 10. **CLI commands** (`register`, `delete`, `view`, `build`) — implemented with `click`. Entry point: `main()` → `cli()`.