ConPTY: transmit DECSET/DECRST state when client application enters/exits ENABLE_VIRTUAL_TERMINAL_INPUT mode #9537

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claunia · 2026-01-31T01:57:00Z

claunia commented

2026-01-31 01:57:00 +00:00

Originally created by @DHowett on GitHub (Jul 10, 2020).

Certain applications (mainly those using the Cygwin/MSYS runtime) will attempt to change VT input parameters while VT input is technically off. Because we do nothing to communicate the expected VT input parameters to a connected terminal before we turn on VT input passthrough, it's possible for the connected terminal to disagree with the conhost acting as its pty host.

When the application enters ENABLE_VIRTUAL_TERMINAL_INPUT mode, ConPTY should send a string of DECSET/DECRST sequences to bring the connected terminal in line with it to keep up the illusion of passthrough.

Notes from #6737:

From the Terminal's perspective, ENABLE_VIRTUAL_TERMINAL_INPUT is always on. It can't be lost/forgotten, because the terminal only generates VT. In general, it always has conhost sitting between it and the application to do translation from VT input. There are cases when the conhost sitting in the middle enters passthrough mode and dumps input straight out of terminal into the application.
Therefore, Terminal needs to be aware of DECCKM. Whether it receives DECCKM and therefore whether it generates the right cursor keys, however, is based on whether the application has requested ENABLE_VIRTUAL_TERMINAL_INPUT.
(There are applications that ask for DECCKM or other VT input format changes but are not in VT input mode, and sending them that data will freak them out.)

For WT 1.0, here's the matrix of behaviors.

Action VT Output Mode VT Input Mode Notes

Application prints \e[?1h ❌ ❌ VT output is off, request ignored

❌ ✅

✅ ❌ conhost (PTY) (only) enables DECCKM

✅ ✅ conhost (PTY) _and Terminal_ enable DECCKM

Action VT Output Mode VT Input Mode PTY in DECCKM mode Terminal in DECCKM mode Notes

User presses arrow key ❌ ❌ ❌ ❌ Terminal emits \e[A or \eOA
conhost (PTY) translates it into KEY_EVENT_RECORD

✅ ❌ ✅ ❌ Terminal emits \e[A
conhost (PTY) translates it into KEY_EVENT_RECORD

✅ ❌ ✅ ✅ Terminal emits \eOA
conhost (PTY) translates it into KEY_EVENT_RECORD

✅ ✅ passthrough mode ❌ Terminal emits \e[A
conhost (PTY) passes it through unmodified

❌ ✅ ❌

✅ ✅ ✅ Terminal emits \eOA
conhost (PTY) passes it through unmodified

❌ ✅ ✅

BEHAVIORS BEFORE TERMINAL 1.0

Action VT Output Mode VT Input Mode Notes

Application prints \e[?1h ❌ ❌ VT output is off, request ignored

❌ ✅

✅ ❌ conhost (PTY) (only) enables DECCKM

✅ ✅

Action VT Output Mode VT Input Mode PTY in DECCKM mode Notes

User presses arrow key ❌ ❌ ignored Terminal emits \e[A
conhost (PTY) translates it into KEY_EVENT_RECORD

✅ ❌

❌ ✅ ❌ Terminal emits \e[A
conhost (PTY) translates it into \e[A

✅ ✅ ❌

❌ ✅ ✅ Terminal emits \e[A
conhost (PTY) translates it into \e[OA

✅ ✅ ✅

@DHowett

Okay, I'm literally seeing this behavior at the PTY:

Input Mode = 0x9

Input Mode = 0x209

Input Mode = 0x9

Print out DECCKM

Input Mode = 0x209

Input Mode = 0x9

This happens with printf, this happens with less's startup (though it prints more than just DECCKM)`, this happens pretty much every time I launch a process.

It's quite literally disabling VT input mode only while it is changing the input configuration. If we'd ever made the console more strict ("VT input mode changes only apply when VT input mode is on"), this would break horribly. I wonder why they'd do this?
@DHowett

Whether it receives DECCKM and therefore whether it generates the right cursor keys, however, is based on whether the application has requested ENABLE_VIRTUAL_TERMINAL_INPUT.

I totally did not expect that. If ENABLE_VIRTUAL_TERMINAL_INPUT is designed to affect which control sequences a pseudoconsole forwards from WriteConsole to the terminal, it is worth documenting.

This regressed with #6485

Why doesn't Windows Terminal Preview 1.1.1812.0 have the same problem, then? 6ff8ba7 was cherry-picked from 5e2c4c6, which is included in that version.
@KalleOlaviNiemitalo

Originally created by @DHowett on GitHub (Jul 10, 2020). Certain applications (mainly those using the Cygwin/MSYS runtime) will attempt to change VT input parameters while VT input is technically off. Because we do nothing to communicate the expected VT input parameters to a connected terminal before we _turn on VT input passthrough_, it's possible for the connected terminal to disagree with the conhost acting as its pty host. When the application enters `ENABLE_VIRTUAL_TERMINAL_INPUT` mode, ConPTY should send a string of `DECSET`/`DECRST` sequences to bring the connected terminal in line with it to keep up the illusion of passthrough. Notes from #6737: > From the Terminal's perspective, `ENABLE_VIRTUAL_TERMINAL_INPUT` is always on. It can't be lost/forgotten, because the terminal only generates VT. In general, it always has conhost sitting between it and the application to do translation from VT input. There are cases when the conhost sitting in the middle enters passthrough mode and dumps input straight out of terminal into the application. > Therefore, Terminal needs to be aware of DECCKM. Whether it receives `DECCKM` and therefore whether it _generates the right cursor keys_, however, is based on whether the application has requested `ENABLE_VIRTUAL_TERMINAL_INPUT`. > (There are applications that ask for DECCKM or other VT input format changes but are _not in VT input mode_, and sending them that data will freak them out.) > > For WT 1.0, here's the matrix of behaviors. > > <table><tbody> > <tr><th>Action</th><th>VT Output Mode</th><th>VT Input Mode</th><th>Notes</th></tr> > <tr> > <td rowspan="4">Application prints <code>\e[?1h</code></td> > <td>❌</td> > <td>❌</td> > <td rowspan="2">VT output is off, request ignored</td> > </tr> > <tr> > <td>❌</td> > <td>✅</td> >  > </tr> > <tr> >  > <td>✅</td> > <td>❌</td> > <td>conhost (PTY) (only) enables DECCKM</td> > </tr> > <tr> >  > <td>✅</td> > <td>✅</td> > <td>conhost (PTY) _and Terminal_ enable DECCKM</td> > </tr> > </tbody></table> > <table><tbody> > <tr><th>Action</th><th>VT Output Mode</th><th>VT Input Mode</th><th>PTY in DECCKM mode</th><th>Terminal in DECCKM mode</th><th>Notes</th></tr> > <tr> > <td rowspan="8">User presses arrow key</td> > <td>❌</td> > <td>❌</td> > <td>❌</td> > <td>❌</td> > <td>Terminal emits <code>\e[A</code> or <code>\eOA</code><br>conhost (PTY) translates it into KEY_EVENT_RECORD</td> > </tr> > <tr> >  > <td>✅</td> > <td>❌</td> > <td>✅</td> > <td>❌</td> > <td>Terminal emits <code>\e[A</code><br>conhost (PTY) translates it into KEY_EVENT_RECORD</td> > </tr> > <tr> >  > <td>✅</td> > <td>❌</td> > <td>✅</td> > <td>✅</td> > <td>Terminal emits <code>\eOA</code><br>conhost (PTY) translates it into KEY_EVENT_RECORD</td> > </tr> > <tr> >  > <td>✅</td> > <td>✅</td> > <td rowspan="4"><em>passthrough mode</em></td> > <td>❌</td> > <td rowspan="2">Terminal emits <code>\e[A</code><br>conhost (PTY) <b>passes it through unmodified</b></td> > </tr> > <tr> >  > <td>❌</td> > <td>✅</td> >  > <td>❌</td> >  > </tr> > <tr> >  > <td>✅</td> > <td>✅</td> >  > <td>✅</td> > <td rowspan="2">Terminal emits <code>\eOA</code><br>conhost (PTY) <b>passes it through unmodified</b></td> > </tr> > <tr> >  > <td>❌</td> > <td>✅</td> >  > <td>✅</td> >  > </tr> > </tbody></table> > > <details> > <summary>BEHAVIORS BEFORE TERMINAL 1.0</summary> > > <table><tbody> > <tr><th>Action</th><th>VT Output Mode</th><th>VT Input Mode</th><th>Notes</th></tr> > <tr> > <td rowspan="4">Application prints <code>\e[?1h</code></td> > <td>❌</td> > <td>❌</td> > <td rowspan="2">VT output is off, request ignored</td> > </tr> > <tr> > <td>❌</td> > <td>✅</td> >  > </tr> > <tr> >  > <td>✅</td> > <td>❌</td> > <td rowspan="2">conhost (PTY) (only) enables DECCKM</td> > </tr> > <tr> >  > <td>✅</td> > <td>✅</td> >  > </tr> > </tbody></table> > <table><tbody> > <tr><th>Action</th><th>VT Output Mode</th><th>VT Input Mode</th><th>PTY in DECCKM mode</th><th>Notes</th></tr> > <tr> > <td rowspan="8">User presses arrow key</td> > <td>❌</td> > <td>❌</td> > <td rowspan="2"><em>ignored</em></td> > <td rowspan="2">Terminal emits <code>\e[A</code><br>conhost (PTY) translates it into KEY_EVENT_RECORD</td> > </tr> > <tr> >  > <td>✅</td> > <td>❌</td> >  >  > </tr> > <tr> >  > <td>❌</td> > <td>✅</td> > <td>❌</td> > <td rowspan="2">Terminal emits <code>\e[A</code><br>conhost (PTY) translates it into <code>\e[A</code></td> > </tr> > <tr> >  > <td>✅</td> > <td>✅</td> > <td>❌</td> >  > </tr> > <tr> >  > <td>❌</td> > <td>✅</td> > <td>✅</td> > <td rowspan="2">Terminal emits <code>\e[A</code><br>conhost (PTY) translates it into <code>\e[OA</code></td> > </tr> > <tr> >  > <td>✅</td> > <td>✅</td> > <td>✅</td> >  > </tr> > </tbody></table> > > </details> > _@DHowett_ > Okay, I'm literally seeing this behavior at the PTY: > > * Input Mode = 0x9 > * Input Mode = 0x209 > * Input Mode = 0x9 > * Print out `DECCKM` > * Input Mode = 0x209 > * Input Mode = 0x9 > > This happens with `printf`, this happens with less's startup (though it prints more than just DECCKM)`, this happens pretty much every time I launch a process. > > It's quite literally disabling VT input mode _only while it is changing the input configuration_. If we'd ever made the console more strict ("VT input mode changes only apply when VT input mode is on"), this would break horribly. I wonder why they'd do this? > _@DHowett_ > > Whether it receives `DECCKM` and therefore whether it _generates the right cursor keys_, however, is based on whether the application has requested `ENABLE_VIRTUAL_TERMINAL_INPUT`. > > I totally did not expect that. If `ENABLE_VIRTUAL_TERMINAL_INPUT` is designed to affect which control sequences a pseudoconsole forwards from `WriteConsole` to the terminal, it is worth documenting. > > > This regressed with #6485 > > Why doesn't Windows Terminal Preview 1.1.1812.0 have the same problem, then? [6ff8ba7](https://github.com/microsoft/terminal/commit/6ff8ba772890bf8abb8431295fe97c8e9e280dcb) was cherry-picked from [5e2c4c6](https://github.com/microsoft/terminal/commit/5e2c4c66e3dcb66c9d60769a2a028e39711168fd), which is included in that version. > _@KalleOlaviNiemitalo_

claunia added the Issue-Bug Area-Input Product-Conpty Priority-2 labels 2026-01-31 01:57:00 +00:00

claunia commented

2026-01-31 01:57:01 +00:00

@RokyBanana commented on GitHub (Jul 16, 2020):

Is there an ETA on this or do I have to downgrade?

I have no problem using the terminal in VS Code, but that's not a solution.

@RokyBanana commented on GitHub (Jul 16, 2020): Is there an ETA on this or do I have to downgrade? I have no problem using the terminal in VS Code, but that's not a solution.

claunia commented

2026-01-31 01:57:02 +00:00

@DHowett commented on GitHub (Jul 16, 2020):

Use the preview version where this isn’t a problem?

@DHowett commented on GitHub (Jul 16, 2020): Use the preview version where this isn’t a problem?

claunia commented

2026-01-31 01:57:02 +00:00

@RokyBanana commented on GitHub (Jul 16, 2020):

Use the preview version where this isn’t a problem?

Have I missed a download? In that case I'm sorry. I'm currenty running "Git for Windows 2.27.0.windows.1 (64bit)".

@RokyBanana commented on GitHub (Jul 16, 2020): > Use the preview version where this isn’t a problem? Have I missed a download? In that case I'm sorry. I'm currenty running "Git for Windows 2.27.0.windows.1 (64bit)".

claunia commented

2026-01-31 01:57:02 +00:00

@DHowett commented on GitHub (Jul 16, 2020):

Oh, sorry! Windows Terminal Preview 1.1+, which should be released to the stable channel soon, doesn’t exhibit this issue. Note if you switch today that it won’t migrate your settings from the Release branch. It’s still pretty stable; we all use it every day to make sure we’re the most exposed to any weird issues it might have. 😄

@DHowett commented on GitHub (Jul 16, 2020): Oh, sorry! [Windows Terminal Preview](https://aka.ms/terminal-preview) 1.1+, which should be released to the stable channel soon, doesn’t exhibit this issue. Note if you switch today that it won’t migrate your settings from the Release branch. It’s still pretty stable; we all use it every day to make sure we’re the most exposed to any weird issues it might have. :smile:

claunia commented

2026-01-31 01:57:02 +00:00

@DHowett commented on GitHub (Jul 19, 2020):

This is wild!

cygwin/msys2 sets and resets ENABLE_VIRTUAL_TERMINAL_INPUT not on every process launch, but for literally every character that's typed.

When we emit DECSET/DECRST for every state transition (to make sure the connected terminal does the right thing even outside of win32 input mode), each byte input into a msys2 application results in about 200 bytes of control sequences just to maintain terminal state.

(@kalleolaviniemitalo might find this interesting, even if just because they've been helping out with some VT_INPUT issues 😄)

@DHowett commented on GitHub (Jul 19, 2020): This is wild! _cygwin/msys2 sets and resets `ENABLE_VIRTUAL_TERMINAL_INPUT` not on every process launch, but for literally every character that's typed._ When we emit DECSET/DECRST for every state transition (to make sure the connected terminal does the right thing even outside of win32 input mode), each byte input into a msys2 application results in about 200 bytes of control sequences just to maintain terminal state. (@kalleolaviniemitalo might find this interesting, even if just because they've been helping out with some VT_INPUT issues :smile:)

claunia commented

2026-01-31 01:57:03 +00:00

@lazka commented on GitHub (Aug 2, 2020):

(@tyan0 is working in this area in cygwin, mentioning here in case he wants to chime in)

@lazka commented on GitHub (Aug 2, 2020): (@tyan0 is working in this area in cygwin, mentioning here in case he wants to chime in)

claunia commented

2026-01-31 01:57:03 +00:00

@dsm1212 commented on GitHub (Sep 28, 2020):

I'm don't quite follow this here, but this keeps happening to my terminal. I launch a new one and it is fine for a while, but eventually arrow keys stop working. 4.4.23(1) Release. Same issue as reported here?

@dsm1212 commented on GitHub (Sep 28, 2020): I'm don't quite follow this here, but this keeps happening to my terminal. I launch a new one and it is fine for a while, but eventually arrow keys stop working. 4.4.23(1) Release. Same issue as reported here?

claunia commented

2026-01-31 01:57:03 +00:00

@hlovdal commented on GitHub (Feb 16, 2021):

Any progress on this?

@hlovdal commented on GitHub (Feb 16, 2021): Any progress on this?

claunia commented

2026-01-31 01:57:04 +00:00

@zadjii-msft commented on GitHub (Feb 16, 2021):

@hlovdal Nope. We'll make sure to update this thread when there is. In the meantime, might I recommend the Subscribe button?

That way you'll be notified of any updates to this thread, without needlessly pinging everyone on this thread ☺️

@zadjii-msft commented on GitHub (Feb 16, 2021): @hlovdal Nope. We'll make sure to update this thread when there is. In the meantime, might I recommend the Subscribe button? ![image](https://user-images.githubusercontent.com/18356694/91237459-5cbb0c80-e700-11ea-9347-b9b1ec2813b1.png) That way you'll be notified of any updates to this thread, without needlessly pinging everyone on this thread ☺️

claunia referenced this issue

2026-01-31 09:23:06 +00:00

[PR #9537] [MERGED] Fix build break where Microsoft.Terminal.Control.dll is empty #27620

claunia referenced this issue

2026-01-31 09:23:07 +00:00

[PR #9537] Fix build break where Microsoft.Terminal.Control.dll is empty #27625

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dev/migrie/search-v2-v3

dev/migrie/pr-15717/its-dangerous-to-go-alone

dev/migrie/f/4768-taskbar-icons

dev/duhowett/padding-in-atlas

dev/migrie/f/3121-tooltips

dev/duhowett/sticky-control

dev/duhowett/fix-tracing-2

dev/migrie/b/add-support-for-vsc-marks

dev/migrie/f/1860-this-is-literally-what-less-is-for

dev/migrie/s/5916-draft

dev/lhecker/tracy

dev/migrie/s/north-star

dev/cazamor/tag-youre-it

dev/migrie/f/12336-let-it-mellow

dev/migrie/f/now-with-more-compat-settings

dev/migrie/f/compatibility-sui

dev/duhowett/hax/wpf-atlas

dev/duhowett/fgb

dev/migrie/b/15487-relative-paths-are-hard

dev/lhecker/colrv1

loc-update

dev/migrie/fhl/dyndep-csharp

dev/migrie/fhl/dyndep

dev/migrie/fhl-clickable-send-input

dev/migrie/f/cwd-hijinks-5506-15173

dev/lhecker/openconsole-async-start

1.17

dev/migrie/bump-scratch

dev/migrie/f/3726-restartConnection

dev/migrie/b/cxn-restarting-attempt-1-backport

dev/migrie/b/9053-part-3-the-actual-doing-of-the-thing

dev/migrie/b/13388-focus-logger

dev/migrie/b/9053-part-4-i-guess-defterm

dev/migrie/oop/3/of-the-silmarils

of-the-darkening-of-valinor

dev/migrie/fhl/notebook-proto-000

dev/migrie/f/narrator-buddy

dev/migrie/mux-2.8.2-march-2023

dev/migrie/f/roast-mutton

dev/migrie/f/12861-preview-input

dev/lhecker/clang-tidy

dev/migrie/f/3121-wE-dOnT-hAvE-dEv-DaYs

dev/duhowett/compiler-compliance

dev/duhowett/i-have-a-burning-hatred-for-ntstatus-of-later-so-why-not-fix-it

dev/duhowett/shorthand-namespaces

dev/duhowett/rename-all-dlls

dev/duhowett/errordialog

dev/lhecker/gsl-narrow

dev/migrie/b/11522-dumb-idea

release-1.16

dev/miniksa/env

dev/duhowett/hax/embed-everything

dev/migrie/b/13388-attempt-003

dev/migrie/b/14512-test-research

dev/migrie/b/13388-attempt-002

dev/migrie/b/14464-copyOnSelect-moving-text

dev/migrie/s/thema-schema-for-1.16

dev/migrie/s/theme-pair-schema

dev/migrie/b/13388-experiments-1

dev/cazamor/spec/a11y-vt-seq

dev/migrie/b/14557-empty-folder-dropdown

dev/cazamor/spec/a11y-vt-seq-v2

release-1.15

dev/migrie/f/process-model-v3-test-0

dev/lhecker/vsconfig

dev/migrie/s/5000-presentation

dev/lhecker/5907-startup-perf

dev/lhecker/winrt-file-api-benchmark

dev/duhowett/128-bit-compiler

dev/duhowett/hax/arm64-native-build

dev/migrie/fhl/more-shell-integration

dev/migrie/b/13388-experiments-0

dev/lhecker/til-to-ulong-improvements

dev/migrie/s/markdown-notebooks

dev/cazamor/a11y/nav-by-page

dev/cazamor/a11y/system-menu-support

dev/duhowett/no-private-registry-keys

dev/cazamor/wpf/uia-expose-enable-events

dev/cazamor/wpf/uia-events

extendAISpec

dev/migrie/fhl/clickSendInput

dev/migrie/fhl/save-command

dev/migrie/b/theme.profile

dev/migrie/b/13943-a-test-for-this

dev/migrie/oop/2/endgame

dev/duhowett/hax/merge_idl

dev/migrie/oop/2/infinity-war

dev/migrie/spellbot-cve

dev/cazamor/a11y-sev3/new-profile-announcement

dev/migrie/fhl/upside-down-mode

release-1.14

dev/migrie/f/9458-startupInfoToTerminal

dev/migrie/fhl/5916-triggers

dev/migrie/b/13523-context-menu

dev/migrie/b/6523-endpaint-outside-lock

dev/migrie/b/12413-OnUnhandledException

dev/lhecker/render-snapshot

dev/cazamor/1.15/scroll-to-point

dev/migrie/mux-2.8-aug-2022

dev/lhecker/lock-console-guard

dev/migrie/f/1504-final

dev/pabhoj/sui_follow_ups

dev/migrie/f/til-winrt.h

dev/cazamor/color-picker-redesign

dev/migrie/fhl/vscode-autocomplete-prototype

dev/migrie/f/1504-prototype

dev/migrie/oop/2/loki

dev/migrie/oop/2/wandavision

dev/migrie/b/8698-YOURE-OUT-OF-ORDER

fabricbot-configuration-migration

dev/migrie/b/12788-did-it-work

dev/migrie/b/localtests-ci-2022

dev/cazamor/1.14/replace-compareInBounds

dev/pabhoj/preview_string

dev/cazamor/ks/switchSelectionEndpoint

dev/migrie/oop/2/COM-ISwapChainProvider-attempt-1

dev/migrie/b/dxd-marker

release-1.13

dev/migrie/b/13066-for-defterm

dev/cazamor/revert-dwm

dev/migrie/b/13066-sw_flash_repeatedly

dev/migrie/b/no-cloaky-cloak

dev/migrie/f/apples-to-oranges

dev/migrie/f/no-custom-caption-btns

dev/migrie/f/10509-mica-and-transparent-titlebars

dev/migrie/b/12911-wpf-focus-fg

dev/migrie/titebar-colors

dev/lhecker/4015-cursor

dev/migrie/fhl/rgb-rainbow-window-frame

dev/migrie/fhl/scroll-marks-prototype

release-1.12

dev/miniksa/compliance

dev/migrie/f/default-icons

dev/migrie/fhl/10175-web-search-for-text

dev/migrie/fhl/menu-complete-prototype

dev/migrie/b/2988-merged-prototypes

dev/migrie/b/2988-niksa-msgs-prototype

dev/migrie/fhl/9583-colorSelection

dev/migrie/b/10609-sui-leak

dev/migrie/b/32-attempt-3

dev/migrie/release-1.12-rejuv-attempt-2

dev/migrie/demo-for-presentation

dev/migrie/b/32-but-im-here-for-12567

dev/duhowett/conpty_first_frame_blug

dev/migrie/b/11092-unfocused-acrylic-settings

dev/migrie/localtests-in-ci

dev/migrie/b/12356-attempt-2

dev/migrie/b/12353-with-null

dev/migrie/b/12387-trim-spaces

dev/migrie/b/5033-bad-start

dev/lhecker/12351-broken-locales

dev/migrie/b/8663-input-to-oem-crash

dev/migrie/b/11743-win10-opacity-is-hard

dev/migrie/f/ctrl-click-elevate

dev/migrie/b/12196-shim-localization

dev/lhecker/issue-4015-til-rect

dev/cazamor/eim/mvvm

dev/migrie/f/--elevate

dev/migrie/b/11668-i-think

dev/migrie/b/11994-wsl-mangline

dev/migrie/eim/3475-action-xmacros

dev/migrie/eim/incremental-build-000

dev/cazamor/a11y/fake-uia-data

dev/migrie/f/non-terminal-content-elevation-warning

dev/migrie/f/632-on-warning-dialog

dev/lhecker/rgba

dev/migrie/b/8480-keybindings-in-tabs

release-1.11

dev/migrie/b/11561-dead-ends

dev/migrie/oct-21-roadmap-update

dev/migrie/fhl/adaptive-card-extension

dev/cazamor/test/11440

dev/migrie/f/warning-dlg-automation

dev/migrie/b/1.12-crash-on-exit

dev/migrie/b/11146-next-tab-in-cmdpal

release-1.10

dev/migrie/5ff9a24-and-75e2b5f

dev/duhowtt/hax/cpal-jumplist-async

dev/lelian/actionid/1

dev/migrie/f/just-elevated-state

dev/lhecker/terminal-settings-cleanup

dev/migrie/gh-10824

dev/pabhoj/cursor_light

dev/migrie/oop/wandavision

dev/migrie/oop/endgame

dev/migrie/oop/infinity-war

dev/lhecker/app-state-actually-hidden

dev/migrie/b/6160-dynamic-default-warning

dev/mgirie/b/more-nchhittest-ideas

dev/migrie/b/9320-interfacial-separation

cinnamon/fhl/find-contextmenu

dev/lhecker/wsl-distro-generator-cleanup

dev/migrie/b/10875-but-more-clever

dev/migrie/b/broken-globalsummon-overloading

dev/duhowett/hax/rle-row

dev/migrie/fhl-2021/cmdpal-select-list

dev/migrie/fhl-2021/differential-pixel-shading

dev/duhowett/hax/no-writable-glyphat

dev/migrie/fhl-2021/more-shader-variables

dev/migrie/titlebar-shenannigans

dev/miniksa/win10_font_matching

dev/lhecker/conhost-oom

dev/migrie/b/10332-less-snappy-scrolling

dev/migrie/b/7422-1px-top-border

release-1.9

dev/cazamor/move-scratch

release-1.8

dev/miniksa/manifest_2

release-1.6

release-1.7

dev/migrie/oop/the-whole-thing

dev/migrie/oop/connection-factory

dev/migrie/f/quake-dropdown-2

dev/miniksa/rle2

dev/migrie/f/quake-toCurrent-experiments-2

dev/migrie/f/quake-toCurrent-experiments

dev/migrie/f/quake-dropdown

dev/cazamor/actions-page/template

dev/duhowett/hax/cursor_stamp_foreground_background

dev/migrie/f/1860-hey-might-was-well-hack-during-a-hackathon

dev/migrie/oop-terminal.control-split-control

dev/duhowett/hax/build-with-wholearchive

dev/cazamor/spec/tsm-actions-temp

dev/migrie/oop-tear-apart-control

dev/migrie/oop-scratch-3

dev/cazamor/sui/bugfix-reload-crash

dev/migrie/f/xmacro

dev/cazamor/sui/proto/profile-nav-view

dev/migrie/f/name-windows

dev/migrie/dol/messing-with-shaders-take-1

release-1.5

dev/cazamor/sui/inheritance-hyperlinks-test

dev/migrie/r/commandline-lib-002

dev/migrie/f/com.fabrikam.toaster

dev/cazamor/adaptive-cards-prototype

dev/migrie/f/commandline-lib

dev/miniksa/zipzoom2

dev/migrie/f/remote-commandlines

dev/migrie/f/632-elevated-profiles

dev/migrie/oop-broker-000

dev/migrie/fix-pr-7015

dev/duhowett/clang

dev/miniksa/input_tests_2

dev/miniksa/input2

dev/migrie/oop-rpc-000

release-1.4

dev/migrie/oop-mixed-elevation-1

dev/migrie/oop-window-content-1

cinnamon/open-json

dev/miniksa/input_tests

dev/duhowett/hax/tsm-graphviz

dev/miniksa/input

dev/duhowett/hax/caption_buttons

release-1.3

dev/cazamor/a11y/expand-line-under-viewport

dev/cazamor/acc/ch/word-nav-perf

dev/cazamor/spec/settings-ui-architecture-draft

dev/duhowett/hax/tap_upgrade

dev/migrie/f/pane-exit-animation

release-1.2

dev/migrie/move-lib-up-and-dll-down

release-1.1

dev/migrie/f/branch-2-backup

dev/migrie/f/settings-getters-only

dev/duhowett/hax/command_palette_search

dev/migrie/f/6856-let-terminalpage-expandcommands

dev/migrie/f/theming-2020

dev/migrie/oop-scratch-4

dev/duhowett/hax/punchout

dev/migrie/s/action-ids

dev/migrie/f/lets-just-generate-these

dev/migrie/oop-scratch-2

dev/miniksa/dcomp

dev/miniksa/gotta_go_fast_spsc

dev/miniksa/gotta_go_fast

dev/miniksa/perf_skip_checks

dev/miniksa/perf_buffer_dig

dev/migrie/s/1203-cursorTextColor

dev/migrie/f/fix-intellisense-i-guess-backup

release-1.0

dev/migrie/f/execute-commandlines

dev/migrie/f/2046-Command-Palette-v2

dev/migrie/b/6421-passthrough-alt

dev/migrie/b/moving-focus-is-hard

dev/miniksa/set

dev/migrie/f/1203-phase-1

dev/migrie/f/get-localtests-in-ci

dev/cazamor/drag-panes

dev/cazamor/tile-background

release-0.11

dev/duhowett/dev/duhowett/hax/appstate_remember

dev/duhowett/load_condrv

dev/duhowett/hax/wpf_win_8_hax

dev/migrie/b/3088-weird-exact-wrap-resize

release-0.10

dev/migrie/b/4591-custom-scaling-bug

dev/duhowett/hax/attr_smuggling

dev/migrie/b/5161-mingw-vim-fix

dev/miniksa/dx_bitmap

dev/migrie/b/1503-try-messing-with-cooked-read

dev/duhowett/eyebeam

dev/migrie/b/5113-experiments

dev/duhowett/hax-selection-exclusive

dev/migrie/f/more-vt-renderer-tracing

dev/miniksa/bitmap

dev/duhowett/wprp

dev/miniksa/bitmap-mad-with-power

dev/migrie/f/resize-quirk

dev/migrie/f/reflow-buffer-on-resize-002

wpf-renderer-revert

dev/miniksa/draw

release-0.9

dev/miniksa/tabs-color-fix

dev/miniksa/4309

dev/migrie/f/just-wrapping

dev/migrie/b/3490-try-another-resize-algo

release-0.8

dev/migrie/b/3490-a-simpler-resize

dev/migrie/b/3490-resize-down

dev/miniksa/4254

dev/migrie/f/conpty-wrapped-lines-2

dev/migrie/b/be-better-at-hiding

dev/migrie/f/3327-xaml-theming-proto

dev/miniksa/gardening2

release-0.7

dev/duhowett/conpty-flags

dev/migrie/f/603-vintage-opacity

dev/migrie/PR#3181-comments

dev/duhowett/font-64

release-0.5

dev/migrie/b/663-paste-lf-always

dev/migrie/b/2011-reordered-fallthrough-strings

dev/migrie/b/411-init-tab-stops

dev/migrie/b/json-patching-is-hard

dev/migrie/b/2455-try-getting-tests-working

dev/migrie/b/1223-change-256-table

dev/migrie/f/2171-openterm.cmd

dev/migrie/f/drag-panes

dev/migrie/f/2046-command-palette

release-0.3

dev/miniksa/manager

dev/migrie/f/non-terminal-panes

dev/migrie/f/passthrough-2019

dev/miniksa/shared_pch

dev/migrie/f/1897-less-duplicated-work

release-0.2

dev/cazamor/mcs/viewport-selection

dev/duhowett/version_hack

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Reference: starred/terminal#9537

Action	VT Output Mode	VT Input Mode	Notes
Application prints `\e[?1h`	❌	❌	VT output is off, request ignored
	❌	✅	VT output is off, request ignored
	✅	❌	conhost (PTY) (only) enables DECCKM
	✅	✅	conhost (PTY) _and Terminal_ enable DECCKM

Action	VT Output Mode	VT Input Mode	PTY in DECCKM mode	Terminal in DECCKM mode	Notes
User presses arrow key	❌	❌	❌	❌	Terminal emits `\e[A` or `\eOA` conhost (PTY) translates it into KEY_EVENT_RECORD
	✅	❌	✅	❌	Terminal emits `\e[A` conhost (PTY) translates it into KEY_EVENT_RECORD
	✅	❌	✅	✅	Terminal emits `\eOA` conhost (PTY) translates it into KEY_EVENT_RECORD
	✅	✅	passthrough mode	❌	Terminal emits `\e[A` conhost (PTY) passes it through unmodified
	❌	✅		❌
	✅	✅		✅	Terminal emits `\eOA` conhost (PTY) passes it through unmodified
	❌	✅		✅

Action	VT Output Mode	VT Input Mode	PTY in DECCKM mode	Notes
User presses arrow key	❌	❌	ignored	Terminal emits `\e[A` conhost (PTY) translates it into KEY_EVENT_RECORD
	✅	❌	ignored
	❌	✅	❌	Terminal emits `\e[A` conhost (PTY) translates it into `\e[A`
	✅	✅	❌
	❌	✅	✅	Terminal emits `\e[A` conhost (PTY) translates it into `\e[OA`
	✅	✅	✅