feat: Cross-references tra web-developer e altre skills

Analisi completata:
- Web-developer references rimangono dedicate (tecniche: HTML/CSS/JS)
- Shared references rimangono per UX/design patterns (strategici)

Aggiunti riferimenti incrociati:

1. agency-web-developer:
   - +5 shared references (hero, design, navigation, conversion, layout patterns)
   - Flusso: leggi pattern UX → implementa con technical refs

2. agency-design-system:
   - +3 web-developer refs per handoff tecnico
   - Nota: produce design doc, web-developer implementa codice

3. agency-ux-copy:
   - +design_patterns.md
   - +2 web-developer refs per handoff HTML/CSS
   - Nota: produce copy, web-developer implementa codice

4. agency-seo:
   - +2 web-developer refs per implementazione on-page SEO
   - Nota: produce strategia SEO, web-developer implementa HTML

Flusso chiarito:
- Shared refs = COSA fare (pattern UX/design)
- Web-developer refs = COME codificare (implementazione tecnica)

agency-design-system/SKILL.md

@@ -224,11 +224,20 @@ Traduce la direzione creativa in un design system coerente e riutilizzabile.
 
 ## References
 
+### UX/Design Patterns (Shared)
 - [layout_systems.md](../../references/layout_systems.md) — Grid e spacing
 - [navigation_patterns.md](../../references/navigation_patterns.md) — IA patterns
 - [design_patterns.md](../../references/design_patterns.md) — UI patterns
 - [qa_visual.md](../../references/qa_visual.md) — QA checklist
 
+### Technical Implementation (Handoff)
+**Per handoff a developer o implementazione diretta:**
+- [html_semantics.md](../agency-web-developer/references/html_semantics.md) — Semantic HTML structure
+- [css_layout.md](../agency-web-developer/references/css_layout.md) — Bootstrap/custom CSS implementation
+- [js_interactivity.md](../agency-web-developer/references/js_interactivity.md) — jQuery + GSAP patterns
+
+**Nota:** Questa skill produce design system documentato. Per implementazione codice, consultare agency-web-developer.
+
 ---
 
 ## Note

agency-seo/SKILL.md

@@ -242,4 +242,19 @@ SEO tecnico, metadata e schema markup per visibilità search.
 
 ---
 
+## References
+
+### SEO Core
+- [navigation_patterns.md](../../references/navigation_patterns.md) — IA patterns
+- [conversion_patterns.md](../../references/conversion_patterns.md) — CTA hierarchy
+
+### Technical Implementation
+**Per implementazione on-page SEO nel codice:**
+- [html_semantics.md](../agency-web-developer/references/html_semantics.md) — Semantic HTML, heading hierarchy, meta tags
+- [css_layout.md](../agency-web-developer/references/css_layout.md) — Mobile-first, performance
+
+**Nota:** Questa skill produce strategia SEO + metadata. Per implementazione HTML, usare agency-web-developer.
+
+---
+
 _Skill generata da framework-translator_

agency-ux-copy/SKILL.md

@@ -226,11 +226,21 @@ Progetta la struttura del sito e scrive copy chiaro e conversion-oriented.
 
 ## References
 
+### UX/Design Patterns (Shared)
 - [copy_frameworks.md](../../references/copy_frameworks.md) — Framework copy
 - [conversion_patterns.md](../../references/conversion_patterns.md) — CTA e conversioni
 - [hero_sections.md](../../references/hero_sections.md) — Hero patterns
 - [navigation_patterns.md](../../references/navigation_patterns.md) — IA patterns
 - [brand_voice.md](../../references/brand_voice.md) — Tone of voice
+- [design_patterns.md](../../references/design_patterns.md) — UI patterns (card grid, split layout, testimonial, FAQ)
+
+### Handoff a Developer
+**Dopo aver completato copy, passare a:**
+- **agency-web-developer** — Implementa HTML/CSS/JS dal copy
+- [html_semantics.md](../agency-web-developer/references/html_semantics.md) — Come il copy diventa struttura HTML
+- [css_layout.md](../agency-web-developer/references/css_layout.md) — Come i layout diventano CSS
+
+**Nota:** Questa skill produce sitemap + copy. Per implementazione codice, usare agency-web-developer.
 
 ---
 

agency-web-developer/SKILL.md

@@ -320,10 +320,23 @@ $(document).ready(function() {
 
 ## References
 
+### Technical (Web Developer Specific)
 - [html_semantics.md](./references/html_semantics.md) — Semantic HTML best practices
 - [css_layout.md](./references/css_layout.md) — Layout, responsive, Bootstrap
 - [js_interactivity.md](./references/js_interactivity.md) — jQuery + GSAP patterns
 
+### UX/Design Patterns (Shared References)
+**Consultare PRIMA di implementare:**
+- [hero_sections.md](../references/hero_sections.md) — Hero checklist, formula, layouts
+- [design_patterns.md](../references/design_patterns.md) — Card grid, split layout, testimonial, FAQ patterns
+- [navigation_patterns.md](../references/navigation_patterns.md) — Primary nav, mobile nav, IA
+- [conversion_patterns.md](../references/conversion_patterns.md) — CTA hierarchy, forms, friction reducers
+- [layout_systems.md](../references/layout_systems.md) — Grid, spacing, vertical rhythm
+
+**Flusso consigliato:**
+1. Leggi pattern UX da shared references (COSA fare)
+2. Implementa con technical references (COME codificare)
+
 ---
 
 ## Note