Add human-focused README.md to every skill and bundle directory

Each README is written for a human audience, explaining:
- What the skill does (not what format it follows)
- What benefit the user gets from installing it
- Quick setup and usage patterns
- When to load/trigger the skill
- What scripts, references, and templates it ships

data-scientist already had a README — left unchanged.

48 READMEs added across all skill and bundle directories.

ghost-cli/README.md

@@ -0,0 +1,36 @@
+# Ghost CMS from the Terminal
+
+Manage content on a Ghost CMS site: view site info, list and create posts and pages, manage tags — all via the Ghost Admin API (v5/v6).
+
+## Why Install This Skill
+
+When your agent loads this skill, it can **manage your Ghost CMS content** without the web editor. That means:
+
+- **List posts and pages** — by status (published, draft, scheduled)
+- **Create content** — write and publish blog posts from the terminal
+- **Manage tags** — list and browse tags
+- **Check site info** — title, URL, description, version
+
+## What You Get
+
+| Directory | Purpose |
+|-----------|---------|
+| `SKILL.md` | Complete command reference with setup and examples |
+| `scripts/ghost-cli` | CLI tool for Ghost Admin API operations |
+
+## Quick Start
+
+```bash
+export GHOST_URL="https://your-ghost-site.com"
+export GHOST_ADMIN_KEY="your-id:your-secret"
+```
+
+API key from Ghost Admin → Integrations → Create custom integration.
+
+## Triggers
+
+Load this when working with Ghost CMS — managing posts, pages, tags, or checking site configuration.
+
+## Requirements
+
+Python 3.8+ with `requests` library.