Visual Studio Code Agents (Preview) should gracefully handle PowerShell shell fallback on Windows

[neonvarun]

Type: Bug

Steps to Reproduce :

Visual Studio Code Agents (Preview) on Windows.
Start an agent task that needs terminal access.
The agent runtime cannot see pwsh, even though PowerShell is installed on the host.
The task fails instead of falling back.

Expected :
Agents should fall back to a supported shell or show a clear setup prompt.

Actual :
The agent runtime cannot see pwsh, so terminal-based work cannot proceed.

Additional Info:
PowerShell is installed on the Windows host, but the Agents preview runtime cannot see it. This blocks terminal-based agent work. A graceful shell fallback would avoid a hard failure.

Extension version: 0.43.2026040705
VS Code version: Code - Insiders 1.115.0-insider (41dd792, 2026-04-07T22:04:57Z)
OS version: Windows_NT x64 10.0.26200
Modes:

Logs

Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [CopilotCLI] Found 2 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: false.
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: true.
Trace: [GitServiceImpl][doOpenRepository] Active repository: {"_repo":{"rootUri":{"$mid":1,"external":"file:///c%3A/Projects/AaryaAI/Aarya_AI","path":"/c:/Projects/AaryaAI/Aarya_AI","scheme":"file"},"inputBox":{},"kind":"repository","state":{},"ui":{}},"rootUri":{"$mid":1,"external":"file:///c%3A/Projects/AaryaAI/Aarya_AI","path":"/c:/Projects/AaryaAI/Aarya_AI","scheme":"file"},"kind":"repository","headBranchName":"main","headCommitHash":"7a642bc841835b78234c4dbe2956ff9584352099","upstreamBranchName":"main","upstreamRemote":"origin","isRebasing":true,"remotes":["origin"],"remoteFetchUrls":["https://github.com/neonvarun/AaryaAI"],"worktrees":[{"name":"Aarya_AI","path":"c:\\Projects\\AaryaAI\\Aarya_AI","ref":"refs/heads/main","detached":false,"main":true},{"name":"copilot-near-hornet","path":"C:/Projects/AaryaAI/Aarya_AI.worktrees/copilot-near-hornet","ref":"refs/heads/copilot/near-hornet","detached":false,"main":false}],"changes":{"mergeChanges":[],"indexChanges":[],"workingTree":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}],"untrackedChanges":[]},"_onDidChangeSignal":{"_observers":{},"debugName":"Observable Signal From Event"},"headBranchNameObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"headCommitHashObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"upstreamBranchNameObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"upstreamRemoteObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"isRebasingObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"_checkIsIgnored":{"_waitingTimeMs":1000,"_queue":[],"_timeout":null},"_isIgnored":{"_map":{},"_map2":{}}}
Debug: [CopilotCLI] Found 2 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [context keys] Window state change. Needs offline check: false, active: false, focused: true.
Trace: [GitServiceImpl][doOpenRepository] Active repository: {"_repo":{"rootUri":{"$mid":1,"external":"file:///c%3A/Projects/AaryaAI/Aarya_AI","path":"/c:/Projects/AaryaAI/Aarya_AI","scheme":"file"},"inputBox":{},"kind":"repository","state":{},"ui":{}},"rootUri":{"$mid":1,"external":"file:///c%3A/Projects/AaryaAI/Aarya_AI","path":"/c:/Projects/AaryaAI/Aarya_AI","scheme":"file"},"kind":"repository","headBranchName":"main","headCommitHash":"7a642bc841835b78234c4dbe2956ff9584352099","upstreamBranchName":"main","upstreamRemote":"origin","isRebasing":true,"remotes":["origin"],"remoteFetchUrls":["https://github.com/neonvarun/AaryaAI"],"worktrees":[{"name":"Aarya_AI","path":"c:\\Projects\\AaryaAI\\Aarya_AI","ref":"refs/heads/main","detached":false,"main":true},{"name":"copilot-near-hornet","path":"C:/Projects/AaryaAI/Aarya_AI.worktrees/copilot-near-hornet","ref":"refs/heads/copilot/near-hornet","detached":false,"main":false}],"changes":{"mergeChanges":[],"indexChanges":[],"workingTree":[{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{},{}],"untrackedChanges":[]},"_onDidChangeSignal":{"_observers":{},"debugName":"Observable Signal From Event"},"headBranchNameObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"headCommitHashObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"upstreamBranchNameObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"upstreamRemoteObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"isRebasingObs":{"_observers":{},"_debugNameData":{},"_state":0,"_updateCount":0,"_dependencies":{},"_dependenciesToBeRemoved":{},"_isUpdating":false,"_isComputing":false,"_didReportChange":false,"_isInBeforeUpdate":false,"_isReaderValid":false,"_removedObserverToCallEndUpdateOn":null},"_checkIsIgnored":{"_waitingTimeMs":1000,"_queue":[],"_timeout":null},"_isIgnored":{"_map":{},"_map2":{}}}
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: true.
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Trace: [ChatSessionMetadataStore] Wrote metadata for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Trace: [ChatSessionMetadataStore] Wrote bulk metadata file with 3 session(s)
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Trace: [CopilotCLI] POST /mcp request, sessionId: 0596fde4-8377-47c9-8604-a399acfaa3f2
Debug: [CopilotCLI] Updating session name for 0596fde4-8377-47c9-8604-a399acfaa3f2 to "Explore GPT-5.4-Mini"
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: false.
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: true.
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: false.
Debug: [context keys] Window state change. Needs offline check: false, active: true, focused: true.
Debug: [CopilotCLI] Found 3 JSONL sessions and 0 legacy sessions
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 0596fde4-8377-47c9-8604-a399acfaa3f2
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session 6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Warning: [ChatSessionWorkspaceFolderService][getWorkspaceChanges] No repository properties found for session c4b0d715-08b3-4f03-845d-50dda9c5b423

Request IDs

38984e65-0915-46ba-b8e0-a3e41f1b3f1c
aeef9cab-2fb3-4019-b1f8-310fc75dceb1
148b16f4-ae2c-42a2-ab27-fe747dd08262
793c3a14-b01b-40e2-ac6d-e83587a38cf0
764a9361-9a12-4d66-96e5-5d1a6c312dd6
ed2f60d8-70e8-4e0f-b5c0-19b75e55d514
e8ae6ffe-e41c-4812-b965-c9f53b6bd60b
20683656-d6a5-4ceb-af03-4cfd81e4cbb2
6899e287-87e7-4c73-875f-f0e11489f5c5
7591efb6-dadd-4cee-bdcf-0fa12df49e55
640769cf-a4f2-439f-b5d0-dd3fab86a0a9
5fa9efc9-1efe-4774-b997-7f02d92cbe41
409b9b40-eba6-4726-92b6-6731e3510913
3988b6a5-1ad4-44df-a83e-ea094becd8ed
50f119b7-63d9-439e-b43b-c899b5c85988
ee2d0ad2-5270-430b-b6d3-15877a8f2446
dc39e81f-6c34-4d52-9416-2209d2a5c3f3
1867b736-9bdc-472c-9647-9b183772c576
d62ae034-c555-4e63-a1df-d419ca4f6423
6b023234-bf2e-480b-834d-9bf5b97e4593
ac228eb3-3958-42d0-b718-af3bf96fe5ea
71ef716b-3eda-474b-98f7-999b75d35e21
a253f114-5ad9-4da4-ad7a-26c30978b351

System Info

Item	Value
CPUs	AMD Ryzen 9 7900X 12-Core Processor (24 x 4691)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x1002, DEVICE=0x164e [AMD Radeon(TM) Graphics], DRIVER_VENDOR=AMD, DRIVER_VERSION=32.0.21043.5001 ACTIVE GPU1: VENDOR= 0x1414, DEVICE=0x008c [Microsoft Basic Render Driver], DRIVER_VERSION=10.0.26100.8115 Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	undefined
Memory (System)	15.11GB (0.90GB free)
Process Argv	--open-url --crash-reporter-id 5ec6d840-77c9-483e-ae79-c85d8ca592cb -- vscode-insiders://file/c:/Projects/AaryaAI?windowId=_blank&session=copilotcli%253A%252F6ce7e422-48dc-4d70-a6f4-25fccdccedfd
Screen Reader	no
VM	0%

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cpptoolson-v2:31475363
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logging_enabled_new:31490725

[sheetsync]

Addressed by https://github.com/microsoft/vscode/agents/pull/312999