feat: Update CLAUDE.md files, add coolify skill

.claude/skills/seed-yaml-sync/SKILL.md

@@ -158,6 +158,13 @@ When adding a new section file:
 2. Add the `!include` directive to the corresponding `_main.yaml`
 3. Maintain logical section ordering
 
+### Rule 9: Change process must start with template, then sync demo
+
+Any change request that affects form structure, visibility conditions, or section spawn triggers must follow this process:
+1. **Modify the template**: Make all necessary changes to the template files first, ensuring structural integrity and logical consistency
+2. **Sync the demo form**: After the template is updated, modify the demo form to mirror the structural changes and add contextually appropriate test data
+3. **Verify both**: Ensure that the template remains the source of truth and that the demo form accurately reflects the template's structure and visibility logic
+
 ## Checklist for Template Changes
 
 When you modify files in the **template/ directory**, verify each item:
@@ -179,4 +186,4 @@ When you modify files in the **demo/ directory**, verify:
 - [ ] **Value consistency**: New values are consistent with the SAP S/4HANA "Einfuehrung" context
 - [ ] **Table data alignment**: Table JSON arrays all have the same length within a single table element
 - [ ] **Cross-reference integrity**: Table values that reference other tables use valid IDs from those tables
-- [ ] **_main.yaml update**: If you added/removed a section file, update `demo/_main.yaml`
+- [ ] **_main.yaml update**: If you added/removed a section file, update `demo/_main.yaml`