ghostty

Tested Software version 1.3.2-main-+3706abab0 on Linux. The homepage URL of this terminal is https://ghostty.org/. Full results available at ucs-detect repository path data/ghostty.yaml.

Score Breakdown

Detailed breakdown of how scores are calculated for ghostty:

#	Score Type	Raw Score	Final Scaled Score
1	WIDE	99.80%	99.7%
2	NARROW	100.00%	100.0%
3	ZWJ	100.00%	100.0%
4	LANG	99.86%	99.9%
5	VS16	100.00%	100.0%
6	VS15	100.00%	(excluded)
7	SRI	100.00%	100.0%
8	SFZ	100.00%	100.0%
9	RI	100.00%	100.0%
10	FEAT	68.75%	73.3%
11	Graphics	100%	100.0%
12	Resources	46.2%	46.2%

Score Comparison Plot:

The following plot shows how this terminal’s scores compare to all other terminals tested.

../_images/ghostty_scores_scaled.png — Scaled scores comparison across all metrics (normalized 0-100%)

Final Scaled Score Calculation:

Raw Final Score: 93.95% (weighted average: WIDE + NARROW + ZWJ + LANG + VS16 + 0.33 * SRI + 0.33 * SFZ + RI + CAP + 0.5 * GFX + 0.5 * RSC) the categorized ‘average’ absolute support level of this terminal.

Note

RSC (Resources) is a composite CPU, memory, and runtime score. RSC is weighted at 0.5 (half as powerful as other metrics). FEAT (Features) is the fraction of notable features supported. GFX (Graphics) scores 100% for modern protocols (iTerm2, Kitty), 50% for legacy only (Sixel, ReGIS), 0% for none.
Final Scaled Score: 98.3% (normalized across all terminals tested). Final Scaled scores are normalized (0-100%) relative to all terminals tested

WIDE Score Details:

Wide character support calculation:

Total successful codepoints: 505
Total codepoints tested: 506
Formula: 505 / 506
Result: 99.80%

NARROW Score Details:

Narrow character support calculation:

Total successful codepoints: 187
Total codepoints tested: 187
Formula: 187 / 187
Result: 100.00%

ZWJ Score Details:

Emoji ZWJ (Zero-Width Joiner) support calculation:

Total successful sequences: 1445
Total sequences tested: 1445
Formula: 1445 / 1445
Result: 100.00%

VS16 Score Details:

Variation Selector-16 support calculation:

Errors: 0 of 426 codepoints tested
Success rate: 100.0%
Formula: 100.0 / 100
Result: 100.00%

VS15 Score Details (excluded from final score):

Variation Selector-15 support calculation:

Errors: 0 of 158 codepoints tested
Success rate: 100.0%
Formula: 100.0 / 100
Result: 100.00%

SRI Score Details:

Standalone Regional Indicator support calculation:

Total successful codepoints: 26
Total codepoints tested: 26
Formula: 26 / 26
Result: 100.00%

SFZ Score Details:

Standalone Fitzpatrick skin tone modifier support calculation:

Total successful codepoints: 5
Total codepoints tested: 5
Formula: 5 / 5
Result: 100.00%

RI Score Details:

Regional Indicator flag sequence support calculation:

Total successful sequences: 262
Total sequences tested: 262
Formula: 262 / 262
Result: 100.00%

Features Score Details:

Notable terminal features (11.0 / 16):

Set bracketed paste mode (2004): yes
Synchronized Output (2026): yes
Send FocusIn/FocusOut events (1004): yes
Enable SGR Mouse Mode (1006): yes
Grapheme Clustering (2027): yes
Bracketed Paste MIME (5522): no
Kitty Keyboard: yes
XTGETTCAP (Full): yes
Text Sizing (OSC 66): no
Kitty Clipboard Protocol: no
OSC 52 Clipboard: yes
Kitty Pointer Shapes (OSC 22): no
Kitty Notifications (OSC 99): no
Color Report (OSC 10/11): yes
Terminal Identification (XTVERSION): yes
Truecolor Detection: yes

Raw score: 68.75%

Graphics Score Details:

Graphics protocol support (100%):

Sixel: no
ReGIS: no
iTerm2: no
Kitty: yes

Scoring: 100% for modern (iTerm2/Kitty), 50% for legacy only (Sixel/ReGIS), 0% for none

Resource Score Details:

Duration: 7.0s
Mean CPU: 100.6%
Mean RSS: 275.2 MB
Resources Score: 46/100
Note: log-scale composite cost = log(CPU+1) + log(RSS+1) + log(time+1)
Scaled result: 46.2%

LANG Score Details (Geometric Mean):

Geometric mean calculation:

Formula: (p₁ × p₂ × … × pₙ)^(1/n) where n = 85 languages
About geometric mean
Result: 99.86%

Wide character support

Wide character support of ghostty is 99.8% (1 errors of 506 codepoints tested).

Sequence of a WIDE character, from midpoint of alignment failure records:

#	Codepoint	Python	Category	wcwidth	Name
1	U+115F	‘\u115f’	Lo	2	HANGUL CHOSEONG FILLER

Total codepoints: 1

Shell test using printf(1), '|' should align in output:
```
$ printf "\xe1\x85\x9f|\\n12|\\n"
ᅟ|
12|
```
See Line 98 of ucs_wide.txt for this sequence in the example file.

Screenshot:

python wcwidth.wcswidth() measures width 2, while ghostty measures width 0.

Narrow character support

Narrow character support of ghostty is 100.0% (0 errors of 187 codepoints tested).

Emoji ZWJ support

Compatibility of ghostty with the Unicode Emoji ZWJ sequence table is 100.0% (0 errors of 1445 sequences tested).

Variation Selector-16 support

Emoji VS-16 results for ghostty is 0 errors out of 426 total codepoints tested, 100.0% success. All codepoint combinations with Variation Selector-16 tested were successful.

Variation Selector-15 support

Emoji VS-15 results for ghostty is 0 errors out of 158 total codepoints tested, 100.0% success. All codepoint combinations with Variation Selector-15 tested were successful.

Standalone Regional Indicator support

Standalone Regional Indicator support of ghostty is 100.0% (0 errors of 26 codepoints tested).

Standalone Fitzpatrick modifier support

Standalone Fitzpatrick skin tone modifier support of ghostty is 100.0% (0 errors of 5 codepoints tested).

Regional Indicator flag sequence support

Regional Indicator flag sequence support of ghostty is 100.0% (0 errors of 262 sequences tested).

Graphics Protocol Support

ghostty supports the following graphics protocols: Kitty graphics.

Detection Methods:

Sixel and ReGIS: Detected via the Device Attributes (DA1) query CSI c (\x1b[c). Extension code 4 indicates Sixel support, 3 ReGIS.
Kitty graphics: Detected by sending a Kitty graphics query and checking for an OK response.
iTerm2 inline images: Detected via the iTerm2 capabilities query OSC 1337 ; Capabilities.

Device Attributes Response:

Extensions reported: 22, 52
Sixel indicator (4): not present
ReGIS indicator (3): not present

Language Support

The following 83 languages were tested with 100% success:

Aja, Amarakaeri, Arabic, Standard, Assyrian Neo-Aramaic, Baatonum, Bamun, Belanda Viri, Bengali, Bhojpuri, Bora, Burmese, Catalan (2), Chakma, Chickasaw, Chinantec, Chiltepec, Dagaare, Southern, Dari, Dendi, Dinka, Northeastern, Dzongkha, Evenki, Farsi, Western, Fon, French (Welche), Fur, Ga, Gen, Gilyak, Gujarati, Gumuz, Hindi, Kabyle, Kannada, Khmer, Central, Khün, Lamnso’, Lao, Lingala (tones), Magahi, Maithili, Malayalam, Maldivian, Maori (2), Marathi, Mazahua Central, Mon, Mòoré, Nanai, Navajo, Nepali, Orok, Otomi, Mezquital, Panjabi, Eastern, Panjabi, Western, Pashto, Northern, Picard, Pular (Adlam), Sanskrit, Secoya, Seraiki, Shan, Shipibo-Conibo, Sinhala, Siona, South Azerbaijani, Tagalog (Tagalog), Tai Dam, Tamang, Eastern, Tamazight, Central Atlas, Tamil, Telugu, Tem, Thai, Thai (2), Tibetan, Central, Ticuna, Uduk, Urdu, Urdu (2), Vietnamese, Yaneshaʼ, Yiddish, Eastern, Yoruba.

The following 2 languages are not fully supported:

lang	n_errors	n_total	pct_success
Sanskrit (Grantha)	22	237	90.7%
Javanese (Javanese)	10	488	98.0%

Sanskrit (Grantha)

Sequence of language Sanskrit (Grantha) from midpoint of alignment failure records:

#	Codepoint	Python	Category	wcwidth	Name
1	U+00011315	‘\U00011315’	Lo	1	GRANTHA LETTER KA
2	U+0001134D	‘\U0001134d’	Mc	0	GRANTHA SIGN VIRAMA

Total codepoints: 2

Shell test using printf(1), '|' should align in output:

$ printf "\xf0\x91\x8c\x95\xf0\x91\x8d\x8d|\\n1|\\n"
𑌕𑍍|
1|

Screenshot:

python wcwidth.wcswidth() measures width 1, while ghostty measures width 2.

Javanese (Javanese)

Sequence of language Javanese (Javanese) from midpoint of alignment failure records:

#	Codepoint	Python	Category	wcwidth	Name
1	U+A98F	‘\ua98f’	Lo	1	JAVANESE LETTER KA
2	U+A9C0	‘\ua9c0’	Mc	0	JAVANESE PANGKON

Total codepoints: 2

Shell test using printf(1), '|' should align in output:

$ printf "\xea\xa6\x8f\xea\xa7\x80|\\n1|\\n"
ꦏ꧀|
1|

Screenshot:

python wcwidth.wcswidth() measures width 1, while ghostty measures width 2.

DEC Private Modes Support

DEC private modes results for ghostty: 7 changeable modes of 7 supported out of 8 total modes tested (87.5% support, 87.5% changeable).

Complete list of DEC private modes tested:

Mode	Name	Description	Supported	Changeable	Enabled
1004	FOCUS_IN_OUT_EVENTS	Send FocusIn/FocusOut events	Yes	Yes	No
1006	MOUSE_EXTENDED_SGR	Enable SGR Mouse Mode	Yes	Yes	No
2004	BRACKETED_PASTE	Set bracketed paste mode	Yes	Yes	No
2026	SYNCHRONIZED_OUTPUT	Synchronized Output	Yes	Yes	No
2027	GRAPHEME_CLUSTERING	Grapheme Clustering	Yes	Yes	Yes
2031	COLOR_PALETTE_UPDATES	Color palette updates	Yes	Yes	No
2048	IN_BAND_WINDOW_RESIZE	In-Band Window Resize Notifications	Yes	Yes	No
5522	BRACKETED_PASTE_MIME	Bracketed Paste MIME	No	No	No

Summary: 7 changeable, 1 not changeable.

Kitty Keyboard Protocol

ghostty supports the Kitty keyboard protocol.

#	Flag	Key	State
1	Disambiguate escape codes	`disambiguate`	No
2	Report event types	`report_events`	No
3	Report alternate keys	`report_alternates`	No
4	Report all keys as escape codes	`report_all_keys`	No
5	Report associated text	`report_text`	No

Detection is performed by sending CSI ? u to query the current progressive enhancement flags. A terminal that supports this protocol responds with the active flags value.

XTGETTCAP (Terminfo Capabilities)

ghostty supports the XTGETTCAP sequence and reports 212 terminfo capabilities (Full).

#	Capability	Description	Value
1	AX	Supports default colors	(empty)
2	BD	Enter bold mode (kitty)	`\E[?2004l`
3	BE	Exit bold mode (kitty)	`\E[?2004h`
4	E3	Erase scrollback	`\E[3J`
5	Ms	Clipboard set	`\E]52;%p1%s;%p2%s\a`
6	PE	Presentation end (kitty)	`\E[201~`
7	PS	Presentation start (kitty)	`\E[200~`
8	RGB	Bits per color channel (8 = 24-bit truecolor)	`8`
9	RV	Enter reverse mode (kitty)	`\E[>c`
10	Se	Reset underline style	`\E[2 q`
11	Setulc	Set underline color	`\E[58:2::%p1%{65536}%/%d:%p1%{256}%/%{255}%&%d:%p1%{255}%...`
12	Smulx	Styled underline	`\E[4:%p1%dm`
13	Ss	Set underline style	`\E[%p1%d q`
14	Su	Colored underlines	(empty)
15	Sync	Synchronized output	`\E[?2026%?%p1%{1}%-%tl%eh%;`
16	TN	Terminal name	`xterm-ghostty`
17	Tc	Truecolor (24-bit RGB)	(empty)
18	XM	Enter marks mode (kitty)	`\E[?1006;1000%?%p1%{1}%=%th%el%;`
19	XR	Enter reset mode (kitty)	`\E[>0q`
20	XT	Xterm extensions	(empty)
21	acsc	Alternate character set	++\,\,--..00``aaffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyz...
22	am	Auto right margin	(empty)
23	bce	Background color erase	(empty)
24	bel	Bell	`\a`
25	blink	Enter blink mode	`\E[5m`
26	bold	Enter bold mode	`\E[1m`
27	ccc	Can redefine colors	(empty)
28	civis	Hide cursor	`\E[?25l`
29	clear	Clear screen	`\E[H\E[2J`
30	cnorm	Normal cursor	`\E[?12l\E[?25h`
31	colors	Max colors on screen	`256`
32	cols	Columns	`80`
33	cr	Carriage return	`\r`
34	csr	Change scroll region	`\E[%i%p1%d;%p2%dr`
35	cub	Cursor left n	`\E[%p1%dD`
36	cub1	Cursor left	`\b`
37	cud	Cursor down n	`\E[%p1%dB`
38	cud1	Cursor down	`\n`
39	cuf	Cursor right n	`\E[%p1%dC`
40	cuf1	Cursor right	`\E[C`
41	cup	Cursor address	`\E[%i%p1%d;%p2%dH`
42	cuu	Cursor up n	`\E[%p1%dA`
43	cuu1	Cursor up	`\E[A`
44	cvvis	Very visible cursor	`\E[?12;25h`
45	dch	Delete n characters	`\E[%p1%dP`
46	dch1	Delete character	`\E[P`
47	dim	Enter dim mode	`\E[2m`
48	dl	Delete n lines	`\E[%p1%dM`
49	dl1	Delete line	`\E[M`
50	dsl	Disable status line	`\E]2;\a`
51	ech	Erase characters	`\E[%p1%dX`
52	ed	Clear to end of screen	`\E[J`
53	el	Clear to end of line	`\E[K`
54	el1	Clear to start of line	`\E[1K`
55	fd	Enter font mode (kitty)	`\E[?1004l`
56	fe	Exit font mode (kitty)	`\E[?1004h`
57	flash	Flash screen	`\E[?5h$<100/>\E[?5l`
58	fsl	From status line	`\a`
59	fullkbd	Full Kitty keyboard protocol	(empty)
60	home	Cursor home	`\E[H`
61	hpa	Horizontal position	`\E[%i%p1%dG`
62	hs	Has status line	(empty)
63	ht	Horizontal tab	`\t`
64	hts	Set tab stop	`\EH`
65	ich	Insert n characters	`\E[%p1%d@`
66	ich1	Insert character	`\E[@`
67	il	Insert n lines	`\E[%p1%dL`
68	il1	Insert line	`\E[L`
69	ind	Scroll forward	`\n`
70	indn	Scroll forward n	`\E[%p1%dS`
71	initc	Initialize color	`\E]4;%p1%d;rgb:%p2%{255}%%{1000}%/%2.2X/%p3%{255}%%{100...`
72	invis	Invisible cursor	`\E[8m`
73	it	Init tabs	`8`
74	kDC	Shifted delete-char key	`\E[3;2~`
75	kDC3	Alt delete-char key	`\E[3;3~`
76	kDC4	Alt-Shift delete-char key	`\E[3;4~`
77	kDC5	Ctrl delete-char key	`\E[3;5~`
78	kDC6	Ctrl-Shift delete-char key	`\E[3;6~`
79	kDC7	Ctrl-Alt delete-char key	`\E[3;7~`
80	kDN	Shifted down-arrow key	`\E[1;2B`
81	kDN3	Alt down-arrow key	`\E[1;3B`
82	kDN4	Alt-Shift down-arrow key	`\E[1;4B`
83	kDN5	Ctrl down-arrow key	`\E[1;5B`
84	kDN6	Ctrl-Shift down-arrow key	`\E[1;6B`
85	kDN7	Ctrl-Alt down-arrow key	`\E[1;7B`
86	kEND	Shifted end key	`\E[1;2F`
87	kEND3	Alt end key	`\E[1;3F`
88	kEND4	Alt-Shift end key	`\E[1;4F`
89	kEND5	Ctrl end key	`\E[1;5F`
90	kEND6	Ctrl-Shift end key	`\E[1;6F`
91	kEND7	Ctrl-Alt end key	`\E[1;7F`
92	kHOM	Shifted home key	`\E[1;2H`
93	kHOM3	Alt home key	`\E[1;3H`
94	kHOM4	Alt-Shift home key	`\E[1;4H`
95	kHOM5	Ctrl home key	`\E[1;5H`
96	kHOM6	Ctrl-Shift home key	`\E[1;6H`
97	kHOM7	Ctrl-Alt home key	`\E[1;7H`
98	kIC	Shifted insert-char key	`\E[2;2~`
99	kIC3	Alt insert-char key	`\E[2;3~`
100	kIC4	Alt-Shift insert-char key	`\E[2;4~`
101	kIC5	Ctrl insert-char key	`\E[2;5~`
102	kIC6	Ctrl-Shift insert-char key	`\E[2;6~`
103	kIC7	Ctrl-Alt insert-char key	`\E[2;7~`
104	kLFT	Shifted left-arrow key	`\E[1;2D`
105	kLFT3	Alt left-arrow key	`\E[1;3D`
106	kLFT4	Alt-Shift left-arrow key	`\E[1;4D`
107	kLFT5	Ctrl left-arrow key	`\E[1;5D`
108	kLFT6	Ctrl-Shift left-arrow key	`\E[1;6D`
109	kLFT7	Ctrl-Alt left-arrow key	`\E[1;7D`
110	kNXT	Shifted next-page key	`\E[6;2~`
111	kNXT3	Alt next-page key	`\E[6;3~`
112	kNXT4	Alt-Shift next-page key	`\E[6;4~`
113	kNXT5	Ctrl next-page key	`\E[6;5~`
114	kNXT6	Ctrl-Shift next-page key	`\E[6;6~`
115	kNXT7	Ctrl-Alt next-page key	`\E[6;7~`
116	kPRV	Shifted previous-page key	`\E[5;2~`
117	kPRV3	Alt previous-page key	`\E[5;3~`
118	kPRV4	Alt-Shift previous-page key	`\E[5;4~`
119	kPRV5	Ctrl previous-page key	`\E[5;5~`
120	kPRV6	Ctrl-Shift previous-page key	`\E[5;6~`
121	kPRV7	Ctrl-Alt previous-page key	`\E[5;7~`
122	kRIT	Shifted right-arrow key	`\E[1;2C`
123	kRIT3	Alt right-arrow key	`\E[1;3C`
124	kRIT4	Alt-Shift right-arrow key	`\E[1;4C`
125	kRIT5	Ctrl right-arrow key	`\E[1;5C`
126	kRIT6	Ctrl-Shift right-arrow key	`\E[1;6C`
127	kRIT7	Ctrl-Alt right-arrow key	`\E[1;7C`
128	kUP	Shifted up-arrow key	`\E[1;2A`
129	kUP3	Alt up-arrow key	`\E[1;3A`
130	kUP4	Alt-Shift up-arrow key	`\E[1;4A`
131	kUP5	Ctrl up-arrow key	`\E[1;5A`
132	kUP6	Ctrl-Shift up-arrow key	`\E[1;6A`
133	kUP7	Ctrl-Alt up-arrow key	`\E[1;7A`
134	kbs	Backspace key
135	kcbt	Back-tab key	`\E[Z`
136	kcub1	Left arrow key	`\EOD`
137	kcud1	Down arrow key	`\EOB`
138	kcuf1	Right arrow key	`\EOC`
139	kcuu1	Up arrow key	`\EOA`
140	kdch1	Delete character key	`\E[3~`
141	kend	End key	`\EOF`
142	kent	Enter/send key	`\EOM`
143	kf1	Function key F1	`\EOP`
144	kf10	Function key F10	`\E[21~`
145	kf11	Function key F11	`\E[23~`
146	kf12	Function key F12	`\E[24~`
147	kf2	Function key F2	`\EOQ`
148	kf3	Function key F3	`\EOR`
149	kf4	Function key F4	`\EOS`
150	kf5	Function key F5	`\E[15~`
151	kf6	Function key F6	`\E[17~`
152	kf7	Function key F7	`\E[18~`
153	kf8	Function key F8	`\E[19~`
154	kf9	Function key F9	`\E[20~`
155	khome	Home key	`\EOH`
156	kich1	Insert character key	`\E[2~`
157	kind	Scroll-down key	`\E[1;2B`
158	km	Has meta key	(empty)
159	kmous	Mouse key	`\E[<`
160	knp	Next page key	`\E[6~`
161	kpp	Previous page key	`\E[5~`
162	kri	Scroll-up key	`\E[1;2A`
163	kxIN	Keyboard in (kitty)	`\E[I`
164	kxOUT	Keyboard out (kitty)	`\E[O`
165	lines	Lines	`24`
166	mc5i	Will not echo input	(empty)
167	mir	Move in insert mode	(empty)
168	msgr	Move in standout mode	(empty)
169	npc	No pad character	(empty)
170	oc	Original colors	`\E]104\a`
171	op	Original pair	`\E[39;49m`
172	pairs	Max color pairs	`32767`
173	rc	Restore cursor	`\E8`
174	rep	Repeat character	`%p1%c\E[%p2%{1}%-%db`
175	rev	Enter reverse mode	`\E[7m`
176	ri	Reverse index	`\EM`
177	rin	Scroll reverse n	`\E[%p1%dT`
178	ritm	Exit italics mode	`\E[23m`
179	rmacs	Exit alternate charset mode	`\E(B`
180	rmam	Disable line wrap	`\E[?7l`
181	rmcup	Exit alt screen	`\E[?1049l`
182	rmir	Exit insert mode	`\E[4l`
183	rmkx	Keypad local mode	`\E[?1l\E>`
184	rmso	Exit standout mode	`\E[27m`
185	rmul	Exit underline mode	`\E[24m`
186	rs1	Reset string 1	`\E]\E\\Ec`
187	rv	Exit reverse mode (kitty)	`\E\[[0-9]+;[0-9]+;[0-9]+c`
188	sc	Save cursor	`\E7`
189	setab	Set background color	`\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%...`
190	setaf	Set foreground color	`\E[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p...`
191	setrgbb	Set RGB background	`\E[48:2:%p1%d:%p2%d:%p3%dm`
192	setrgbf	Set RGB foreground	`\E[38:2:%p1%d:%p2%d:%p3%dm`
193	sgr	Set attributes	`%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p5%t;2%;%?%p2%t;4%;%...`
194	sgr0	Reset attributes	`\E(B\E[m`
195	sitm	Enter italics mode	`\E[3m`
196	smacs	Enter alternate charset mode	`\E(0`
197	smam	Enable line wrap	`\E[?7h`
198	smcup	Enter alt screen	`\E[?1049h`
199	smir	Enter insert mode	`\E[4h`
200	smkx	Keypad transmit mode	`\E[?1h\E=`
201	smso	Enter standout mode	`\E[7m`
202	smul	Enter underline mode	`\E[4m`
203	tbc	Clear all tabs	`\E[3g`
204	tsl	To status line	`\E]2;`
205	u6	CPR response format	`\E[%i%d;%dR`
206	u7	CPR request	`\E[6n`
207	u8	DA response format	`\E[?%[;0123456789]c`
208	u9	DA request	`\E[c`
209	vpa	Vertical position	`\E[%i%p1%dd`
210	xenl	Newline glitch	(empty)
211	xm	Exit marks mode (kitty)	`\E[<%i%p3%d;%p1%d;%p2%d;%?%p4%tM%em%;`
212	xr	Exit reset mode (kitty)	`\EP>\\|[ -~]+a\E\`

The XTGETTCAP sequence (DCS + q Pt ST) allows applications to query terminfo capabilities directly from the terminal emulator, rather than relying on the system terminfo database.

Text Sizing Protocol (OSC 66)

ghostty does not support the Text Sizing protocol.

Truecolor Support

ghostty supports 24-bit truecolor, detectable via:

XTGETTCAP (RGB capability): yes (RGB)
DECRQSS (truecolor probe): yes (probe)
COLORTERM: yes (truecolor)

OSC 52 Clipboard Support

ghostty supports OSC 52 clipboard operations (detected via DA1 extension 52 + XTGETTCAP Ms).

DA1 extension 52: yes
XTGETTCAP Ms: yes

Terminal Identification

ghostty is identified as ghostty version 1.3.2-main-+3706abab0 (detected via XTVERSION + XTGETTCAP TN).

XTVERSION (raw): ghostty 1.3.1-arch2
XTVERSION: yes
XTGETTCAP TN: yes (xterm-ghostty)
ENQ: no
TERM_PROGRAM: yes (ghostty)
TERM: yes (xterm-ghostty)

Reproduction

To reproduce these results for ghostty, install and run ucs-detect with the following commands:

uvx ucs-detect --rerun data/ghostty.yaml

Test Performance

The test suite completed in 7.01 seconds (7s).

Mean CPU: 100.6%
Mean RSS: 275.2 MB
Total time: 7.0s

CPU usage over time — CPU usage during test execution for *ghostty*.

RSS memory over time — RSS memory usage during test execution for *ghostty*.

Duration comparison — Test duration for *ghostty* compared to all other terminals.

CPU % vs Duration — CPU % vs duration trade-off for *ghostty*.