[PR #8864] Add support for the DECID report #27318

New Issue

claunia · 2026-01-31T09:21:18Z

claunia commented

2026-01-31 09:21:18 +00:00

Original Pull Request: https://github.com/microsoft/terminal/pull/8864

State: closed
Merged: Yes

This PR adds support for the DECID (Identify Device) escape sequence,
which allows for querying the terminal type in a way that is backwards
compatible with VT52 terminals.

This simply checks for the ESC Z sequence in the ActionEscDispatch
method of output state machine, and forwards the query to the existing
DeviceAttributes dispatch method, since the expected response is
identical to a DA report.

Validation Steps Performed

I've added an output engine test that verifies that the ESC Z sequence
is correctly interpreted as a DA query when in ANSI mode, and as a
VT52 identification query when in VT52 mode.

Closes #8857

**Original Pull Request:** https://github.com/microsoft/terminal/pull/8864 **State:** closed **Merged:** Yes --- This PR adds support for the `DECID` (Identify Device) escape sequence, which allows for querying the terminal type in a way that is backwards compatible with VT52 terminals. This simply checks for the `ESC Z` sequence in the `ActionEscDispatch` method of output state machine, and forwards the query to the existing `DeviceAttributes` dispatch method, since the expected response is identical to a `DA` report. ## Validation Steps Performed I've added an output engine test that verifies that the `ESC Z` sequence is correctly interpreted as a `DA` query when in ANSI mode, and as a VT52 identification query when in VT52 mode. Closes #8857

claunia added the pull-request label 2026-01-31 09:21:18 +00:00

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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#27318