feat: add creating articles skill

.claude/skills/creating-articles/SKILL.md

@@ -0,0 +1,56 @@
+---
+name: creating-articles
+description: Creates new blog posts for the Artsy Engineering blog. Use when the user wants to write, create, or start a new blog post or article.
+---
+
+# Creating Articles
+
+For full documentation, see [docs/authoring_articles.md](../../../docs/authoring_articles.md).
+
+## Workflow
+
+### Step 1: Gather Information
+
+Use AskUserQuestion to ask the user:
+
+1. **Template selection** - Ask which template they want to use:
+   - `regular-post` - Short, straightforward posts (recommended for most posts)
+   - `long-post` - Detailed posts with introduction, body, and conclusion
+   - `epic-post` - Narrative-style posts following the monomyth structure
+
+2. **Author name** - Ask for their name, then check if they exist in `_config.yml` under the `authors:` key.
+
+### Step 2: Validate Author
+
+Read `_config.yml` and search for the author under the `authors:` section.
+
+**If author exists**: Use their author key (e.g., `orta`, `db`, `joey`).
+
+**If author does not exist**: Inform the user they need to add themselves to `_config.yml` first:
+
+```yaml
+authors:
+  authorkey:
+    name: Full Name
+    github: githubUsername
+    twitter: twitterHandle  # optional
+    site: https://example.com  # optional
+```
+
+### Step 3: Create the Post
+
+1. Generate filename: `YYYY-MM-DD-post-title.markdown` (use today's date)
+2. Copy the selected template from `Post-Templates/` to `_posts/`
+3. Update the front matter:
+   - Set `title`
+   - Set `date` to today
+   - Set `author` to the author key
+   - Set `categories` (ask user if not provided)
+
+## Templates Reference
+
+| Template | File | Use Case |
+|----------|------|----------|
+| Regular | `Post-Templates/YYYY-MM-DD-regular-post.markdown` | Quick posts about a problem and solution |
+| Long | `Post-Templates/YYYY-MM-DD-long-post.markdown` | Detailed technical deep-dives |
+| Epic | `Post-Templates/YYYY-MM-DD-epic-post.markdown` | Narrative journey-style posts |