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urxvt Mouse Reporting (1015)
urxvt-style mouse reporting (mode 1015) uses decimal encoding for coordinates, extending reporting beyond the 223-column limit of traditional X10 encoding. Less common than SGR mouse (1006) but still supported by some terminals.
How this is tested: Enable urxvt mouse mode (
CSI ? 1015 h), check getMode("mouseTracking") returns true. Verifies the backend recognizes this specific mouse encoding.Analysis2026-03-26
Supported by 7 of 8 terminals (88%). Not supported by: Cursor. Part of the Rich TUI baseline.
Supported by 10 of 13 backends (77%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| VS Code | 1.112.0 | ✓ yes | |
| Warp | 0.2026.03.18.08.24.03 | ✓ yes | |
| Cursor | 2.6.21 | ✓ yes | |
| tmux | 3.6a | ✓ yes | |
| Kitty | 0.46.2 | ✓ yes | urxvt mouse mode (?1015) not implemented |
| Terminal.app | 2.15 | ✓ yes | |
| GNU Screen | 5.0.1 | ✓ yes |
Headless Backends
Parser correctness only — a ✓ means the parser accepts the sequence.
| Backend | Version | Support | Notes |
|---|---|---|---|
| vterm | 0.2.0 | ✓ yes | urxvt mouse mode (?1015) not implemented |
| Alacritty | 0.26.0 | ✗ no | urxvt mouse mode (?1015) not implemented |
| vt100 | 0.2.1 | ✗ no | urxvt mouse mode (?1015) not implemented |
| WezTerm | 0.1.0-fork.5 | ✗ no | urxvt mouse mode (?1015) not implemented |