chat agent hangs even for simple commands

[meganrogge]

From @jooyoungseo

The command completes in the terminal, but the chat agent does not recognize that it's completed and hangs.

Logs show PartialCommandDetection

2025-06-13 14:02:57.150 [debug] terminalInstance added capability [3]

2025-06-13 14:02:58.287 [debug] CommandDetectionCapability#handlePromptStart [0,4]

2025-06-13 14:02:58.287 [debug] terminalInstance added capability [0]

2025-06-13 14:02:58.290 [debug] terminalInstance added capability [5]

2025-06-13 14:02:58.290 [debug] CommandDetectionCapability#setPromptTerminator [" "]

2025-06-13 14:02:58.343 [debug] Unbinding from mouse events. []

2025-06-13 14:02:58.525 [debug] TextAreaSyncAddon#sync: text changed to "" []

2025-06-13 14:02:58.723 [debug] CommandDetectionCapability#_handleCommandStartWindows [0,6]

2025-06-13 14:02:58.759 [debug] TextAreaSyncAddon#sync: text changed to "" []

2025-06-13 14:02:59.655 [debug] sending data (vscode) ["ls\r"]

2025-06-13 14:02:59.666 [debug] Buffer content tracker: [0," lines cached"]

2025-06-13 14:02:59.666 [debug] Viewport content update complete,  [2," lines in the viewport"]

2025-06-13 14:02:59.666 [debug] Buffer content tracker: set  [2," lines"]

2025-06-13 14:02:59.744 [debug] parsing data "[3;13Hls[3;15H[3;15H

logs.txt

[meganrogge]

I've also requested the Github Copilot logs

[meganrogge]

Looks like for partial detection, onCommandFInished is fired immediately

vscode/src/vs/platform/terminal/common/capabilities/partialCommandDetectionCapability.ts

Line 60 in 07e1bdf

this._onCommandFinished.fire(marker);

[meganrogge]

Other logs:

2025-06-13 14:48:51.765 [info] request done: requestId: [1cbd1edc-f817-4b34-ad04-2dc2ef51afa1] model deployment ID: []

2025-06-13 14:48:51.830 [debug] Collect instructions from file: .github/copilot-instructions.md

2025-06-13 14:48:51.832 [debug] Instructions file not found: file:///c%3A/demo/.github/copilot-instructions.md

2025-06-13 14:48:51.878 [debug] RunInTerminalTool: Invoking with options {"command":"Get-ChildItem","explanation":"Lists the files and folders in the current directory.","isBackground":false}

2025-06-13 14:48:51.879 [debug] RunInTerminalTool: Creating terminal with session ID `c54ce2ee-6cf5-4e86-a413-f9366f373bd5`

2025-06-13 14:48:53.720 [debug] RunInTerminalTool: Using `basic` execute strategy for command `Get-ChildItem`

2025-06-13 14:48:53.720 [debug] RunInTerminalTool#Basic: Waiting for idle

2025-06-13 14:48:55.175 [debug] RunInTerminalTool#Basic: Executing command line `Get-ChildItem`

[meganrogge]

I can reproduce on Windows with NVDA on in screen reader mode when using pwsh and running any command, including ls.

[meganrogge]

Just confirmed - this is not hit at all when the command gets run via chat, so _onCommandFinished isn't fired - and that's what gets listened to in the runInTerminalTool. That's the problem.

https://github.com/microsoft/vscode/blob/dd48c7f264782fc16486381e8792f79a3f7a19fa/src/vs/platform/terminal/common/capabilities/partialCommandDetectionCapability.ts#L52-61

[meganrogge]

Fixed!