Add CLAUDE.md with deployment and structure docs.

CLAUDE.md

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+# remarkbox-theme-meta
+
+Theme package for meta.remarkbox.com and faq.remarkbox.com.
+
+## Deployment
+
+**Theme changes do NOT auto-deploy.** After pushing this repo, you must also
+push `~/git/remarkbox` to trigger the CI/CD pipeline. The pipeline pulls this
+theme fresh via `pip install` during each remarkbox build.
+
+```bash
+# 1. Push the theme
+cd ~/git/remarkbox-theme-meta && git push
+
+# 2. Push remarkbox to trigger deploy
+cd ~/git/remarkbox && git commit --allow-empty -m "Redeploy to pick up meta theme changes." && git push
+```
+
+## Structure
+
+- `remarkbox_theme_meta/templates/meta-base.j2` — main base template
+- `remarkbox_theme_meta/templates/meta-base-funnel.j2` — funnel pages (setup, login, billing)
+- `remarkbox_theme_meta/static/theme/meta/css/meta.css` — theme CSS
+- `remarkbox_theme_meta/static/theme/meta/css/skeleton.css` — grid framework
+- `remarkbox_theme_meta/static/theme/meta/img/` — theme images
+
+## Footer
+
+The `rb-footer` styles and HTML are **duplicated** in this repo and in
+`~/git/www.remarkbox.com/custom.css`. When changing footer layout, update both.
+
+## Style
+
+- Never say "AI" — always say "machine learning."
+- Always use "URI" instead of "URL" in user-facing text.
+
+## Commit Attribution
+
+Do NOT include `Co-Authored-By` lines or generated-with tags.