Add blog-search AI agent for GitHub Copilot

[Copilot]

• Explore the repository structure and understand blog post format
• Identify blog post content structure (markdown files with YAML frontmatter: title, date, url, tags)
• Identify existing tags used in posts
• Create .github/agents directory for GitHub Copilot agents
• Create blog-search.md agent file with instructions for searching blog posts
• Request code review and fix issues
• Run security checks
• Final cleanup and improvements
• Merge main to get Copilot setup workflow

Original prompt

add an ai agent that can search the blog posts on the site

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[bmurty]

@copilot Merge in main again to get the new Copilot Setup action, then run that here to confirm the setup works

[Copilot]

@copilot Merge in main again to get the new Copilot Setup action, then run that here to confirm the setup works

Merged main in commit 64fe0b7. The Copilot Setup workflow is triggered but requires approval to run (GitHub security feature for bot-triggered workflows). The workflow already passed successfully on main (run #1). You can approve run #2 at https://github.com/brendanmurty/site/actions/runs/19841052257 to verify it passes on this branch as well.