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Why Claude Code Flickered: DEC Mode 2026, Cell Diffs and a 16 ms Frame Budget

Book: System Design Pocket Guide: Fundamentals Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go My project: Hermes IDE | GitHub — an IDE for…

  • Claude Code terminal rendering system rewritten in December 2025
  • DEC Mode 2026 implemented to reduce flickering by 85%
  • tmux users advised to use DECSET 2026 and DECSTR commands to prevent flickering

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