Move skills to .agent directory

.agents/skills/substack-expert/references/seo-output-example.md

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+# SEO Metadata — Output Example
+
+## Input
+
+> "Create SEO definitions for an article about how digital nomads can choose the best smartwatches."
+
+## Output
+
+| Field            | Value                                                                                                      | Notes                                                        |
+|------------------|------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------|
+| **Title**        | The 5 Best Smartwatches for Digital Nomads in 2025                                                         | Utility trigger, audience specification, timeliness signal   |
+| **Meta Description** | Discover the essential smartwatch features for trails and global travel. Read the complete guide for Digital Nomads and choose your gear. | 155–160 chars, includes keyword and implicit CTA             |
+| **URL Slug**     | `/smartwatches-digital-nomads`                                                                             | 3–5 keywords, no dates, evergreen-friendly                   |
+
+## SEO Rules Applied
+
+- Title is 50 characters (within the 40–60 char target for maximum CTR).
+- Slug contains no auto-generated numbers or filler words.
+- Meta description closes with an action-oriented phrase without being a hard sell.