chore(skills): add domain-action naming convention to create-skill

Documents the {domain}-{action} naming pattern for new skills
so future skills follow the convention established in the kit.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/create-skill/SKILL.md

@@ -178,7 +178,11 @@ For design patterns, consult:
 **Writing guidelines:** Always use imperative/infinitive form.
 
 **Frontmatter:**
-- `name`: The skill name
+- `name`: The skill name — use **domain-action** naming: `{domain}-{action}`.
+  The domain is the system/area the skill operates on, the action is what it does.
+  Examples: `pr-review`, `sprint-plan`, `docs-search`, `git-commit`, `debt-scan`.
+  Multi-action wrappers (like `ticket`) can use the domain name alone.
+  The directory name must match the `name` field.
 - `description`: Primary triggering mechanism. Include what the skill does AND
   specific triggers/contexts. All "when to use" info goes here (not in body).