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1. Project Analysis and Context

Last Updated: 2025-01-29

Existing Project Overview

Analysis Source

  • Type: IDE-based fresh analysis
  • Research Materials: research/www.enchun.tw/ directory

Current Project State

Original System (Webflow)

Platform: Webflow CMS + Hosted Website Website: www.enchun.tw (恩群數位行銷) Purpose: Corporate showcase website + content marketing platform Content Structure:

  • 7 main pages
  • 4 article categories
  • 35+ blog articles
  • Portfolio showcase
  • Team profiles

Target Audience:

  • Potential clients (seeking digital marketing services)
  • Internal editors (content management)
  • Administrators (system management)

Target System (New Architecture)

Architecture: Monorepo (pnpm workspaces)

website-enchun-mgr/
├── apps/
│   ├── backend/     # Payload CMS (Headless CMS)
│   └── frontend/    # Astro (SSR frontend)
└── packages/
    └── shared/      # Shared TypeScript utilities

Technology Stack:

  • Frontend: Astro 6.0.x (SSR mode + Cloudflare native runtime) + Tailwind CSS v4 + TypeScript
  • Backend/CMS: Payload CMS 3.x + MongoDB
  • Authentication: Payload CMS built-in authentication system ✅
  • Deployment: Cloudflare Pages (frontend) + Node.js (Payload CMS admin)
  • Storage: Cloudflare R2 (media files)

為什麼選擇 Astro 6.0？

  • ✅ Cloudflare native runtime - 開發和生產使用相同環境
  • ✅ 原生 Cloudflare Workers 整合（Cloudflare 2026年1月收購 Astro）
  • ✅ 支援 Rate Limiting、PDF Generation、Live Collaborative Editing
  • ✅ 更快的 Cloudflare Pages 部署和邊緣快取

Migration Drivers

  1. Performance Improvement: Target Lighthouse 95+ scores
  2. Cost Optimization: Reduce Webflow subscription fees
  3. Flexibility: Greater customization capabilities and integration options
  4. Maintainability: Modern development toolchain and better DX
  5. SEO Preservation: Maintain and improve existing SEO value

Available Documentation Analysis

Available Documentation

Document Status Notes
Tech Stack Documentation ❌ Needs creation
Source Tree/Architecture ❌ Needs creation
Coding Standards ❌ Needs creation
API Documentation ❌ Needs creation
UX/UI Guidelines ❌ Needs extraction from Webflow
CMS Collection Structure ✅ Available cms_structure.md
Original PRD ✅ Available PRD.md (high-level needs)

Recommendation

Action Required: Run document-project task before implementation to establish:

  • Complete technical documentation
  • Architecture diagrams
  • Coding standards
  • API specifications

This will help the development team better understand existing patterns and constraints.

Enhancement Scope Definition

Enhancement Type

✅ Technology Stack Migration (Complete platform migration)

Enhancement Description

Migrate the existing Webflow CMS-hosted website completely to a modernized Payload CMS + Astro architecture while maintaining all content, SEO value, and user experience. This includes page reconstruction, content migration, SEO redirects, authentication system implementation, and CMS admin interface integration.

Impact Assessment

✅ Major Impact (Architectural changes required)

  • Complete frontend framework replacement
  • Migration from hosted CMS to self-hosted Headless CMS
  • New authentication and authorization system
  • Data migration and structure transformation

Goals and Background Context

Goals

  1. ✅ Fully migrate all 7 main pages with 95%+ visual fidelity to original design
  2. ✅ Migrate 35+ blog articles and 4 categories to Payload CMS
  3. ✅ Implement complete 301 redirect mappings to preserve SEO equity
  4. ✅ Achieve Lighthouse performance scores of 95+ for all public pages
  5. ✅ Establish secure authentication system supporting Admin and Editor roles
  6. ✅ Build user-friendly CMS admin interface for content editors
  7. ✅ Deploy to Cloudflare Pages + Workers infrastructure
  8. ✅ Maintain or improve existing SEO rankings and organic traffic

Background Context

Enchun Digital Marketing currently uses Webflow CMS for their corporate website and content marketing platform. While Webflow provides convenient visual editing and hosting, long-term costs and technical limitations have become growth bottlenecks. To achieve better cost-effectiveness, greater customization flexibility, and modernized development and deployment workflows, the company has decided to migrate to a Payload CMS + Astro architecture.

This migration is not just a technology platform switch, but aims to establish a scalable, high-performance, and maintainable digital platform to support Enchun Digital's long-term business growth. The migration process must ensure content integrity, SEO value preservation, and user experience continuity.

Change Log

Change Date Version Description Author
Initial creation 2025-01-29 v4 Brownfield PRD created from migration analysis PM Agent
Authentication correction 2025-01-29 v4.1 Corrected Auth.js references to Payload CMS built-in auth PM Agent

Next Section: Requirements