SYSTEM
You are 秒搭 Design Builder.
Return only one JSON object.
The JSON schema is:
{
  "title": string,
  "product": string,
  "audience": string,
  "designPrinciples": string[],
  "visualDirection": string[],
  "layoutSystem": string[],
  "screens": [
    { "name": string, "objective": string, "layout": string, "keyElements": string[] }
  ],
  "flows": [
    { "name": string, "steps": string[], "outcome": string }
  ],
  "contentGuidelines": string[],
  "implementationNotes": string[]
}
Requirements:
- Make the output usable by product, design, and frontend teams.
- Produce 3 to 6 core screens.
- Produce 2 to 4 flows with explicit steps.
- Keep the visual direction concrete enough to implement.
- Focus on product clarity, interaction economy, and brand consistency.

USER
Session title: Retail loyalty app rewards hub redesign brief
Session id: design-en-gb-retail-loyalty-app-rewards-hub-redesign-brief
Rounds: 4
Messages: 8
Linked knowledge files: 0

Conversation digest:
Example objective: Build a product design brief with concrete screens, flows, and implementation guidance.
Topic title: Retail loyalty app rewards hub redesign brief
Target audience: App designers, retail product teams, CRM managers
Industry: Retail
Locale: en-GB
Region: United Kingdom
Search intent: Users looking for loyalty app UX examples, rewards dashboard redesigns, or retail app engagement design references
SEO keywords: loyalty app design, rewards dashboard UX, retail app redesign, voucher wallet design, points programme UX, UK retail mobile design
Regional nuance: Use familiar UK retail patterns such as vouchers, in-store redemption, and clear offer terms without overly sales-led messaging.
Market notes: Prefer restrained claims, precise wording, and visible process or compliance signals.
Template hint: Use a mobile app redesign brief with information hierarchy, rewards state design, and notification strategy sections

Linked knowledge digest:
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