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Lessons (5)

• Collaborative Document Editing & Real-Time Sync

  … Ephemeral Presence The problem Design a real-time collaborative document editor like Google Docs. Many users edit the …

• C4 Architecture Diagrams: Context, Container, Component and Code

  … For this API, a useful component diagram answers: “When checkout happens, which parts of the API collaborate?” mermaid …

• Time, Consistency and Distributed Transactions

  … CRDTs converge without coordination for suitable mergeable data; operational transformation resolves collaborative edits with an explicit transformation model …

• AI Specialties and Real-World Examples

  … item history → ranked items Suggest relevant books Ranking, collaborative filtering, cold start, feedback bias Forecasting Past observations → future …

• Domain-Driven Design: Strategic Design

  … together; they plan jointly Tightly linked features, good collaboration Shared kernel A small model shared and co-owned …