wiki: add manual update guide for Gemini CLI

MajorWiki-Deploy-Status.md

@@ -60,3 +60,22 @@ rsync -av --include="*.md" --include="*/" --exclude="*" \
 - **Cause:** `majwiki` container was in a restart loop due to a `LiterateNavParseError` in `SUMMARY.md` (invalid globbing syntax).
 - **Repair:** Rewrote `SUMMARY.md` with explicit links. Repaired `majwiki-webhook.service` by killing an orphaned process and correcting the Caddy reverse proxy routing for `/webhook`.
 - **Result:** Site live and auto-deployment functional.
+
+---
+
+*Updated 2026-03-13*
+
+## Canonical Update Workflow
+
+Obsidian Git plugin was evaluated and dropped — too convoluted. Manual git from the terminal is the workflow going forward.
+
+```bash
+cd ~/Documents/MajorVault
+git add 20-Projects/MajorTwin/08-Wiki/
+git commit -m "wiki: describe your changes"
+git push
+```
+
+Gitea receives the push → fires webhook → majorlab pulls → MkDocs rebuilds → `notes.majorshouse.com` updates automatically.
+
+> [!note] The rsync one-liner in the Update Workflow section above was a one-off during initial setup. It is no longer the canonical method.