Copilot CLI repeats action output indefinitely during PowerShell commands #817
Description
Describe the bug
The agent is now getting stuck in a response loop during certain actions and repeating the same output over and over.
This didn’t happen in previous versions. For instance, when I asked it to check for a DLL file, it echoed the same message repeatedly before finally running the command.
Affected version
0.0.371 Commit: e3fbcaf
Steps to reproduce the behavior
It seems to happen when the agent runs a Get-ChildItem command in PowerShell. In my example, I asked it to find a *.dll file, and the agent generated the following command internally:
Get-ChildItem -Path "$env:USERPROFILE\.agency\artifacts\corext-hybrid-repo-pkg-updater\ACES.PackageUpdater.Updates\tools\net8.0\any\" -Filter *.dllExample output: (I tried to replicate the problem with CTRL+R enabled, but the outputs are the same)
Expected behavior
A single output line. For example: "List DLL files in the specified repository" just once.
Additional context
- Logs are attached
- Operating system: Windows
- CPU architecture: x64
- Terminal emulator: Windows Terminal
- Shell: PowerShell Core (pwsh)
Based on the logs, I observed multiple response chunks which might be causing the repeated outputs.
Example:
2025-12-19T22:53:08.555Z [DEBUG] Chunk received with choices missing finish_reason: {
"choices": [
{
"index": 0,
"delta": {
"content": ", you",
"role": "assistant"
}
}
],
"created": 1766184788,
"id": "d0eaff70-28c1-4dc1-8ce4-713a2b4d9c54",
"model": "claude-sonnet-4.5"
}
2025-12-19T22:53:08.587Z [DEBUG] Chunk received with choices missing finish_reason: {
"choices": [
{
"index": 0,
"delta": {
"content": " have multiple",
"role": "assistant"
}
}
],
"created": 1766184788,
"id": "d0eaff70-28c1-4dc1-8ce4-713a2b4d9c54",
"model": "claude-sonnet-4.5"
}
2025-12-19T22:53:08.632Z [DEBUG] Chunk received with choices missing finish_reason: {
"choices": [
{
"index": 0,
"delta": {
"content": " DLL tools",
"role": "assistant"
}
}
],
"created": 1766184788,
"id": "d0eaff70-28c1-4dc1-8ce4-713a2b4d9c54",
"model": "claude-sonnet-4.5"
}