Pylance Copilot Server is activated even if "python.languageServer": "None"

[trinhanhngoc]

Hello Pylance team. I just noticed that after I enable Copilot, Pylance language server is activated under the new name Pylance Copilot Server even if I disabled it by setting "python.languageServer": "None". Is this expected behavior?

VSCode

Version: 1.101.1
Commit: 18e3a1ec544e6907be1e944a94c496e302073435
Date: 2025-06-18T13:35:12.605Z
Electron: 35.5.1
ElectronBuildId: 11727614
Chromium: 134.0.6998.205
Node.js: 22.15.1
V8: 13.4.114.21-electron.0
OS: Darwin arm64 24.5.0

Pylance 2025.6.1

[github-actions[bot]]

Hi @trinhanhngoc, I'm an AI Support assistant here to help with your issue. While the team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

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Similar Issues (FYI only, not solutions)

The following issues may or may not be related to your report. They are provided for reference only, as they may describe similar symptoms or relate to the same feature, but may not be the same issue.

• Incorrect python.languageServer spelling in docs leading to config being ignored. "python.languageSever" or "python.languageServer" ? #134
• python.languageServer value not accepted despite Pylance extension installed. already install Pylance but python.languageserver setting no exsit Pylance option #145

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[rchiodo]

Transferred to a question as this isn't a bug.

Yes that is expected. Pylance provides context to the copilot APIs so that copilot works better. It needs to run a server in the background for that to work.

[trinhanhngoc]

@rchiodo , Thanks for the answer. However, Pylance’s diagnosis feature is still activated, though other features like code completion, go to definition,... are disabled. Is this expected behaviour?

[rchiodo]

No that should be a bug.

[rchiodo]

Thanks for finding that. I entered an issue:
#7349