Shell Integration makes REPL prompt garbled

[Isa-rentacs]

Type: Bug

Behaviour

With the shell integration option (Python > Terminal > Shell Integration) enabled, the prompt in Python REPL becomes garbled.

• Expected (with the option disabled)

➜  python
Python 3.11.13 (main, Jul 11 2025, 22:43:55) [Clang 20.1.4 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.executable
'/home/<redacted>/.local/share/mise/installs/python/3.11.13/bin/python'
>>>

• With the option enabled

➜  python    
Python 3.11.13 (main, Jul 11 2025, 22:43:55) [Clang 20.1.4 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
Ctrl click to launch VS Code Native REPL
]633;C]633;E;sys.executable]633;D;0]633;A>>> ]633;Bimport sys
]633;C]633;E;import sys]633;D;0]633;A>>> ]633;Bsys.executable
'/home/<redacted>/.local/share/mise/installs/python/3.11.13/bin/python'
]633;C]633;E;sys.executable]633;D;0]633;A>>> ]633;B

Steps to reproduce:

1. Enable the shell integration option (Python > Terminal > Shell Integration)
2. Open a terminal
3. Start a Python REPL (running python)

Diagnostic data

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

2025-09-17 18:31:37.901 [info] Telemetry is disabled
2025-09-17 18:31:37.901 [info] Telemetry level is off
2025-09-17 18:31:37.901 [info] Experiments are disabled, only manually opted experiments are active.
2025-09-17 18:31:37.901 [warning] Dir "<redacted>" is not watchable (directory does not exist)
2025-09-17 18:31:37.901 [warning] Dir "<redacted>" is not watchable (directory does not exist)
2025-09-17 18:31:37.955 [info] Not enabling terminal env var experiment in multiroot remote workspaces
2025-09-17 18:31:37.988 [info] Skipping ActivatedEnv Detection:  process.env.VSCODE_CLI !== '1'
2025-09-17 18:31:37.989 [info] Python interpreter path: ./<redacted_venv>/bin/python3
2025-09-17 18:31:38.086 [info] > pyenv which python
2025-09-17 18:31:38.086 [info] cwd: ~/<redacted>
2025-09-17 18:31:38.124 [info] Not enabling terminal env var experiment in multiroot remote workspaces
2025-09-17 18:31:43.701 [info] Starting Pylance language server.
2025-09-17 18:31:48.820 [info] Not enabling terminal env var experiment in multiroot remote workspaces
2025-09-17 18:31:48.896 [info] Send text to terminal: source <redacted_venv>/bin/activate
2025-09-17 18:33:12.714 [info] Discover tests for workspace name: undefined - uri: <redacted>/AppData/Roaming/Code/User/settings.json
2025-09-17 18:34:23.337 [info] Not enabling terminal env var experiment in multiroot remote workspaces
2025-09-17 18:34:23.417 [info] Send text to terminal: source <redacted_venv>/bin/activate
2025-09-17 18:34:46.973 [info] Discover tests for workspace name: undefined - uri: <redacted>/AppData/Roaming/Code/User/settings.json
2025-09-17 18:34:52.931 [info] Not enabling terminal env var experiment in multiroot remote workspaces
2025-09-17 18:34:53.014 [info] Send text to terminal: source <redacted_venv>/bin/activate

Extension version: 2025.14.0
VS Code version: Code 1.104.0 (f220831ea2d946c0dcb0f3eaa480eb435a2c1260, 2025-09-10T06:46:18.035Z)
OS version: Windows_NT x64 10.0.22631
Modes:
Remote OS version: Linux x64 5.10.240-218.966.amzn2int.x86_64

[NaOHCC]

+1, I have the same problem

[ctx400]

Same here. This just happened to me after updating.

[anthonykim1]

Thanks for the issue. Do you all have terminal.integrated.shellIntegration.enabled to true?

And are all of you using remote-ssh and not wsl?

[nrlulz]

And are all of you using remote-ssh and not wsl?

I am seeing this behavior in a linux devcontainer on mac os, and terminal.integrated.shellIntegration.enabled is true. Garbled python prompt when python.terminal.shellIntegration.enabled is also enabled, appears normal when disabled. I have not tried to isolate or minimally reproduce the issue, but I'm happy to provide more info if needed.

[Isa-rentacs]

Thanks for the issue. Do you all have terminal.integrated.shellIntegration.enabled to true?

Yes, with the option enabled, the REPL prompt became garbled. I was using remote-ssh and the terminal is for the remote machine.

I tried to repro it again but somehow it doesn't reproduce for me regardless of the option enabled or disabled. I also do not see the message Ctrl click to launch VS Code Native REPL at the start of the REPL anymore.

Here's my current environment

Extension version: 2025.14.0
VS Code version: Code 1.104.2 (e3a5acfb517a443235981655413d566533107e92, 2025-09-24T11:21:37.073Z)
OS version: Windows_NT x64 10.0.22631

[ctx400]

Thanks for the issue. Do you all have terminal.integrated.shellIntegration.enabled to true?

And are all of you using remote-ssh and not wsl?

I am using VSCode on a Chromebook in the Linux dev environment. With terminal.integrated.shellIntegration.enabled set to true, the prompt is garbled. Only after I disabled this option did the prompt display normally again.

EDIT: I also see this issue on a true Linux machine (Fedora 42)

[egidioln]

Hello! Same issue here. This renders the REPL unusable in the Terminal tab.

Setting terminal.integrated.shellIntegration.enabled to `false is also my workaround (after restarting the windows)

I'm on Ubuntu 24.04.3

Version: 1.104.3
Commit: 385651c938df8a906869babee516bffd0ddb9829
Date: 2025-10-02T12:30:51.747Z
Electron: 37.3.1
ElectronBuildId: 12404162
Chromium: 138.0.7204.235
Node.js: 22.18.0
V8: 13.8.258.31-electron.0
OS: Linux x64 6.14.0-32-generic