Input Protocols

Input protocols for enhanced keyboard and mouse reporting. Modern terminals support multiple mouse tracking modes (X10, normal, button-event, urxvt, SGR, pixel) and keyboard enhancement protocols (modifyOtherKeys, Kitty keyboard) that provide richer input than traditional VT100 key sequences. These protocols enable TUI applications to handle modifier keys, mouse position, and key release events accurately.

6 features in this category

Terminal Applications

Feature	iTerm2	Ghostty	cmux	Kitty	VS Code	Warp	Cursor	Terminal.app
Button-Event Mouse (1002)	?	?	?	?	?	?	?	?
CSI u Key Encoding	?	?	?	?	?	?	?	?
modifyOtherKeys	?	?	?	?	?	?	?	?
Pixel Mouse Reporting (1016)	?	?	?	?	?	?	?	?
urxvt Mouse Reporting (1015)	?	?	?	?	?	?	?	?
X10 Mouse Tracking (9)	?	?	?	?	?	?	?	?

Headless Backends

Parser correctness tested via Termless. A ✓ means the parser accepts the sequence, not that it renders correctly.

Feature	vterm	Alacritty	WezTerm	vt100
Button-Event Mouse (1002)	✓	✓	✓	✓
CSI u Key Encoding	✓	✓	✓	✓
modifyOtherKeys	✓	✓	✓	✓
Pixel Mouse Reporting (1016)	✓	✓	✓	✓
urxvt Mouse Reporting (1015)	✓	✓	✓	✓
X10 Mouse Tracking (9)	✓	✓	✓	✓

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