Appearance
Combining characters (0 cols)
Combining characters (like accents, diacritical marks) attach to the preceding base character and should occupy zero additional columns. For example, é can be written as e + U+0301 (combining acute accent) — the cursor should advance by 1 column, not 2.
How this is tested: Write a base character followed by a combining accent (e.g., e + U+0301), verify the combined character occupies 1 column, not 2.
Supported by 10 of 13 backends (77%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| cmux | 0.62.2 | ✓ yes | |
| Kitty | 0.46.2 | ✓ yes | |
| VS Code | 1.112.0 | ✓ yes | |
| Warp | 0.2026.03.18.08.24.03 | ✓ yes | |
| Cursor | 2.6.21 | ✓ yes | |
| Terminal.app | 2.15 | ✓ yes |