Copilot switches to windows theme instead of staying dark

Open

#4,857 opened on Sep 15, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 3/5
Estimated time: 1-2 days
Newbie friendliness: 55/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Active
Tech stack: powershell, shell
Domain: cli

Research direction

Start by reproducing the issue in a new GitHub Copilot CLI session on Windows with the apps theme set to light and a PowerShell prompt using a dark background. Trace how the CLI selects its terminal theme and identify the existing configuration or theme behavior; done means the session stays dark or exposes a documented way to force it.

Written by the indexing model from the issue text.

Description

triage

Describe the bug

Previously, my powershell prompt opens with a dark background (even though my windows apps theme is light). And then copilot would honor this and stay with a dark background. With a recent update, copilot immediately switches to a light background and I don't see a way to force it to stay dark.

Affected version

GitHub Copilot CLI 1.0.84-8.

Steps to reproduce the behavior

Start a new copilot session with Windows in light mode for apps.

Expected behavior

Copilot stays dark background or provides me with a way to configure it to do so.

Additional context

No response

Dominant language: Shell
Stars: 11.2k
Forks: 1.9k
Avg merge: 14h 16m
Merged PRs (30d): 6

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