Alacritty

A GPU-rendered emulator with a deliberately small feature set; window management, tabs, and graphics are left to other programs.

Identity

• TERM: alacritty (ships its own terminfo).
• TERM_PROGRAM: not set.
• ALACRITTY_WINDOW_ID, ALACRITTY_SOCKET, and ALACRITTY_LOG are set.
• XTVERSION: ?

Documentation

• Configuration
• Repository
• CHANGELOG

Notable behavior

• No graphics protocols by design.
• Implements the Kitty keyboard protocol (0.13) and underline styles.
• Supports OSC 8, OSC 52 (writes; reads are off by default), and synchronized output (2026).
• Does not implement mode 2027.
• alacritty_terminal is published as a library and is used by other projects, so Alacritty's parser behavior can appear in unexpected places.

Version notes

0.x.y numbering; the CHANGELOG is precise about which release added each sequence.

Probe

alacritty --version
tools/query '\033[c'

Feature support

Records are maintained independently in tdn/terminals/alacritty.yaml. Unlisted features are unknown. See the comparison for all features.

Feature	Support	As of	Notes and evidence
Kitty apc-kitty-graphics	UnsupportedImported · unverified	Unversioned	No ([Alacritty issue #910, "Sixel/graphics support"](https://github.com/alacritty/alacritty/issues/910), closed as out of scope.) | Also recorded: No ([Alacritty issue #910, "Sixel/graphics support"](https://github.com/alacritty/alacritty/issues/910), closed as out of scope.); Declined by the maintainers import import
BEL urgency/visual c0-bel-attention	SupportedImported · unverified	Unversioned	Yes import
14/16 pixel sizes csi-14-16-t-pixel-sizes	SupportedImported · unverified	Unversioned	Yes import
18 size in cells csi-18-t-text-size	SupportedImported · unverified	Unversioned	Yes import
22/23 title stack csi-22-23-t-title-stack	SupportedImported · unverified	Unversioned	Yes import
ED 3 (scrollback) csi-3-j-erase-scrollback	SupportedImported · unverified	Unversioned	Yes import
DECRQM csi-decrqm	SupportedImported · unverified	Unversioned	Yes import
DECSTBM csi-decstbm	SupportedImported · unverified	Unversioned	Yes import
DECSTR csi-decstr	SupportedImported · unverified	Unversioned	Yes import
ED/EL/ECH/ICH/DCH/IL/DL csi-editing-operations	SupportedImported · unverified	Unversioned	Yes import
REP csi-rep	SupportedImported · unverified	Unversioned	Yes import
SU/SD csi-su-sd-scroll	SupportedImported · unverified	Unversioned	Yes import
Kitty keyboard protocol csi-u-kitty-keyboard	SupportedImported · unverified	Unversioned	Yes; Since 0.13 ([Alacritty 0.13 changelog](https://github.com/alacritty/alacritty/blob/master/CHANGELOG.md).) import
Sixel dcs-sixel	UnsupportedImported · unverified	Unversioned	No ([Alacritty issue #910, "Sixel/graphics support"](https://github.com/alacritty/alacritty/issues/910), closed as out of scope.) | Also recorded: No ([Alacritty issue #910, "Sixel/graphics support"](https://github.com/alacritty/alacritty/issues/910), closed as out of scope.); Declined by the maintainers import import
1000 mouse dec-mode-1000-mouse	SupportedImported · unverified	Unversioned	Yes import
1002 button motion dec-mode-1002-button-motion	SupportedImported · unverified	Unversioned	Yes import
1003 all motion dec-mode-1003-all-motion	SupportedImported · unverified	Unversioned	Yes import
1004 focus dec-mode-1004-focus	SupportedImported · unverified	Unversioned	Yes ([Alacritty escape sequence support](https://github.com/alacritty/alacritty/blob/master/docs/escape_support.md).) import
1006 sgr mouse dec-mode-1006-sgr-mouse	SupportedImported · unverified	Unversioned	Yes import
1007 alternate scroll dec-mode-1007-alternate-scroll	SupportedImported · unverified	Unversioned	Yes import
1015 urxvt mouse dec-mode-1015-urxvt-mouse	SupportedImported · unverified	Unversioned	Yes import
1049 alternate screen dec-mode-1049-alternate-screen	SupportedImported · unverified	Unversioned	Yes import
2004 bracketed paste dec-mode-2004-bracketed-paste	SupportedImported · unverified	Unversioned	Yes | Also recorded: Yes; ([Alacritty escape sequence support](https://github.com/alacritty/alacritty/blob/master/docs/escape_support.md).) import import
2026 synchronized output dec-mode-2026-synchronized-output	SupportedImported · unverified	Unversioned	Yes import
Grapheme cluster mode (2027) dec-mode-2027-grapheme-clusters	UnknownImported · unverified	Unversioned	?; Not implemented (`?` for issue status) import
DEC Special Graphics esc-dec-special-graphics	SupportedImported · unverified	Unversioned	Yes ([Alacritty](https://github.com/alacritty/alacritty), `alacritty_terminal` charset handling.) import
OSC 0/2 set osc-0-2-title	SupportedImported · unverified	Unversioned	Yes import
OSC 10/11 query osc-10-11-default-colors-query	SupportedImported · unverified	Unversioned	Yes import
OSC 10/11 set osc-10-11-default-colors-set	SupportedImported · unverified	Unversioned	Yes import
104/110/111 reset osc-104-110-111-color-reset	SupportedImported · unverified	Unversioned	Yes import
OSC 12 cursor osc-12-cursor-color	SupportedImported · unverified	Unversioned	Yes import
iTerm2 osc-1337-inline-images	UnsupportedImported · unverified	Unversioned	No ([Alacritty issue #910, "Sixel/graphics support"](https://github.com/alacritty/alacritty/issues/910), closed as out of scope.) import
OSC 4 query osc-4-palette-query	SupportedImported · unverified	Unversioned	Yes import
OSC 4 set osc-4-palette-set	SupportedImported · unverified	Unversioned	Yes import
OSC 52 read osc-52-read	UnknownImported · unverified	Unversioned	?; Writes allowed; reads unimplemented import
OSC 52 write osc-52-write	SupportedImported · unverified	Unversioned	Yes; Writes allowed; reads unimplemented import
OSC 8 hyperlinks osc-8-hyperlinks	SupportedImported · unverified	Unversioned	Yes (0.11) import
256 colors sgr-256-colors	SupportedImported · unverified	Unversioned	Yes import
Italic 3 sgr-3-italic	SupportedImported · unverified	Unversioned	Yes import
Colon form 38:2 sgr-38-2-colon-form	SupportedImported · unverified	Unversioned	Yes import
Truecolor 38;2 sgr-38-2-truecolor	SupportedImported · unverified	Unversioned	Yes import
Underline styles 4:n sgr-4-underline-styles	SupportedImported · unverified	Unversioned	Yes (0.12+) import
Underline color 58 sgr-58-underline-color	SupportedImported · unverified	Unversioned	Yes import
Strikethrough 9 sgr-9-strikethrough	SupportedImported · unverified	Unversioned	Yes import
bce terminfo-bce	SupportedImported · unverified	Unversioned	Yes import
Bold-is-bright option text-bold-is-bright	SupportedImported · unverified	Unversioned	Yes import
Synthesized box drawing text-box-drawing	SupportedImported · unverified	Unversioned	Yes import
Color emoji rendering text-color-emoji	SupportedImported · unverified	Unversioned	Yes import
Italic face text-italic-face	SupportedImported · unverified	Unversioned	Yes import
Bundled Unicode tables text-unicode-tables	SupportedImported · unverified	Unversioned	Yes import