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Reverse Wrap (Mode 45)
Reverse wrap mode (mode 45) allows backspace at column 0 to wrap to the end of the previous line. Without this mode, backspace at column 0 is a no-op. Useful for command-line editing across wrapped lines.
How this is testedautomated
Enable auto-wrap + reverse wrap, fill row 0 to trigger wrap to row 1, backspace — verify cursor reverse-wraps to end of row 0 via
Enable auto-wrap + reverse wrap, fill row 0 to trigger wrap to row 1, backspace — verify cursor reverse-wraps to end of row 0 via
getCursor().The same probe runs against headless backends (via Termless) and real terminal apps (via a daemon launched in each terminal). This lets us distinguish parser correctness from rendering correctness.
Analysis2026-04-06
Supported by 13 of 14 backends (93%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| VS Code | ✓ yes | ||
| Warp | ✓ yes | ||
| Cursor | ✓ yes | ||
| Terminal.app | ✓ yes |