Consolidate blog tags: 57 → 23 unique tags

- Fix case duplicates (guide→Guide, project→Project, etc.)
- Consolidate single-post tags into broader categories
- Add technology tags (Python, AWS, Salt, Docker, Kubernetes) to 93 posts
- Add lib/tag_stats.py tool for checking tag usage
- Update CLAUDE.md with tag guidelines

CLAUDE.md

@@ -188,6 +188,23 @@ Russell Ballestrini
 - Use `|` for vertical spacing before signature
 - Links use RST inline syntax: ```link text <URL>`_``
 
+## BLOG POST TAGS
+
+**Check existing tags before writing posts:**
+```bash
+venv/bin/python lib/tag_stats.py       # all tags with counts
+venv/bin/python lib/tag_stats.py 5     # only tags with 5+ posts
+```
+
+**Core tags (use these):**
+- Code, DevOps, Python, Guide, Opinion, Salt, AWS, Project, Docker, Security, Machine Learning, Game Development, Kubernetes
+
+**Rules:**
+- Always use existing tags when applicable
+- Suggest new tags only if truly needed (new technology/topic area)
+- Tags should be capitalized (e.g., "Python" not "python")
+- Avoid single-use tags; consolidate into broader categories
+
 ## DATE HANDLING FOR NEW CONTENT
 
 **CRITICAL: ALWAYS check the current date BEFORE creating ANY new documents**