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claude-code - 💡(How to fix) Fix feat: emit ANSI cursor shape escape sequences based on VIM mode

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When editorMode is set to "vim" in settings.json, Claude Code should emit ANSI cursor shape escape sequences when switching between normal and insert mode — just like full Vim/Neovim does.

Root Cause

When editorMode is set to "vim" in settings.json, Claude Code should emit ANSI cursor shape escape sequences when switching between normal and insert mode — just like full Vim/Neovim does.

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Summary

When editorMode is set to "vim" in settings.json, Claude Code should emit ANSI cursor shape escape sequences when switching between normal and insert mode — just like full Vim/Neovim does.

Desired behavior

  • Normal mode → block cursor (\e[2 q)
  • Insert mode → line/bar cursor (\e[6 q)
  • Replace mode → underline cursor (\e[4 q)
  • On exit, restore the terminal's original cursor shape (\e[0 q)

Why

Terminal cursor shape is one of the most useful visual indicators of the current VIM mode. Without it, users in vim editor mode have no passive feedback about which mode they're in — they have to look at status text (if any) or try typing to find out.

Most modern terminals (iTerm2, Ghostty, WezTerm, Kitty, etc.) support these escape sequences natively. Full Vim/Neovim emits them by default. It would be a low-effort, high-value addition to Claude Code's VIM mode.

References

  • ANSI cursor shape sequences: ESC [ Ps SP q (DECSCUSR)
  • Ps = 0, 1 → blinking block; Ps = 2 → steady block
  • Ps = 3 → blinking underline; Ps = 4 → steady underline
  • Ps = 5 → blinking bar; Ps = 6 → steady bar

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#permission error#memory optimization#batch processing#GPU compatibility#latency issue

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claude-code - 💡(How to fix) Fix feat: emit ANSI cursor shape escape sequences based on VIM mode