HardAI Evaluated

Design Collaborative Document Editing

Overview

Design a concurrent multi-user rich text editing system where multiple users can type, format, and delete content simultaneously in the same document with zero conflict loss.

Requirements

1Real-time concurrent text editing with sub-100ms synchronization across all active collaborators
2Accurate conflict resolution guarantees without data corruption or character ordering bugs
3Live cursor position broadcasting and active user presence list
4Support offline editing with automatic sync and merge upon reconnection
5Document revision history with time-travel rewind and version comparison

Architecture Hints (4)

Target Concepts

#CRDT#Operational Transformation#WebSockets#PubSub#Concurrency

Canvas Editor

Design Collaborative Document Editing

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