Design ChatGPT (Streaming Chat with Branching & Share-link)
hardAI
Asked at
GitHub, Notion, OpenAI, Perplexity, Vercel
Problem statement
Design a streaming chat product like ChatGPT — token-by-token SSE rendering, the message tree that makes regenerate work, AbortController-based stop, and frozen share-link snapshots. Mentor-tone walkthrough with three flow diagrams.
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- Full RADIO-framework walkthrough with architecture diagrams
- Data model, API design, and rendering strategy trade-offs
- Performance, accessibility, and offline sections plus a model answer
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