microsoft / microsoft/copilot-intellij-feedback

Copilot Agent Fails to produce an output with IOException

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1.12.1 bug component: agent-mode priority: high
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Forks
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Merged PRs (30d)
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Description

Feedback source

None

GitHub Copilot plugin version

1.12.1-251

JetBrains IDE and version

JetBrains Rider 2026.1.2

Platform

Not relevant, happens on Mac and Windows OS.

Steps to reproduce

Create a request using Claude Sonnet 4.5, 4.6 or any other, ask to create an MD file with a new feature requirements.

Logs (optional)

No response

Expected behavior

Producing output without an exception. handle exceptions internally.

Actual behavior
Image Image
Additional information

This issue happens way too often.
Usually I can resolve selecting Auto agent. But input tokens are consumed twice then. Not to mention time requiring to recalculate everything.

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the request in JetBrains Rider 2026.1.2 with Claude Sonnet and an MD-file request, then collect the IOException details because no logs are provided. Done means the agent produces the requested output without an exception and does not require the Auto agent workaround or duplicate input-token consumption.

Written by the indexing model from the issue text.

Assessment

Domain
devtools
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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