add sync info

Author: ilarsf

README.md

@@ -33,9 +33,9 @@ bundle exec jekyll serve
 - Update content in `docs/` (Markdown).
 - Add new links to `docs/references.md`.
 - Track important changes in `docs/changelog.md`.
+- If you update `tools/index.html`, run `tools/sync_docs_tools.sh` to publish it to `docs/tools/index.html` for GitHub Pages.
 
 ## Source material
 
 This site is reorganized and expanded from a long-form internal guide:
 - See **Appendix → Original long-form guide**.
-

tools/sync_docs_tools.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+src="${repo_root}/tools/index.html"
+dest_dir="${repo_root}/docs/tools"
+dest="${dest_dir}/index.html"
+
+mkdir -p "${dest_dir}"
+cp "${src}" "${dest}"
+
+echo "Synced ${src} -> ${dest}"