What's the working GitHub Copilot Chat version for code-server v4.111.0 in March 2026?

[WeBeautifulNow]

I'm trying to get GitHub Copilot Chat working on code-server v4.111.0 (VS Code 1.111.0) but
hitting multiple issues. Looking for a confirmed working combination.

Environment:

• code-server: v4.111.0 (VS Code 1.111.0, Node.js 22.22.0)
• Installation method: Offline via VSIX files (network restrictions)
• Platform: Linux amd64 (production), macOS ARM64 (local testing)

Combinations tried:

1. code-server v4.111.0 + Copilot Chat v0.40.2026031802
   - Error: API proposals not found (chatDebug@3, chatHooks@6, etc.)
   - Error: No default agent registered
   - Result: Shows "Pre-Release version not supported" warning
2. code-server v4.111.0 + Copilot Chat v0.39.2026030507 (MS confirmed this is the version for
   VS Code 1.111)
   - Error: API proposals not found (chatDebug@2, chatHooks@6, etc.)
   - Error: navigator is now a global in nodejs
   - Error: No default agent registered
   - Result: Chat setup fails
3. code-server v4.109.2 + Copilot Chat v0.37.2026013001
   - Same errors as above

Attempted fixes:

• ✅ Added settings.json with "extensions.supportNodeGlobalNavigator": true (doesn't work)
• ✅ Verified network access to GitHub Copilot APIs (all accessible)
• ✅ Tried both unified Copilot Chat extension and separate Copilot + Chat extensions

Questions:

1. Is there a confirmed working code-server + Copilot Chat combination in March 2026?
2. Are the API proposal errors a known limitation of code-server vs official VS Code?
3. Should I wait for code-server v4.112/v4.113 to fix the compatibility issues?

I need the newer Copilot features (agent mode, Claude models) for production use. Any
guidance would be appreciated!

References:

• MS issue confirming VS Code 1.111 → Copilot Chat 0.39:
  Can't install 'GitHub Copilot Chat' extension. microsoft/vscode#302590
• Navigator error details: navigator is now a global in nodejs microsoft/vscode#252077

[WeBeautifulNow]

Update: Tested multiple version combinations

After extensive testing, I found an interesting pattern:

✅ Working (2023):

• code-server v4.20.0 + Copilot v1.149.652 + Copilot Chat v0.11.1
• No errors, works perfectly
• BUT: No agent mode (agent mode was released in Feb 2025)

❌ Not Working (2025+):

• code-server v4.99.3 + Copilot Chat v0.26.2025040204 (April 2025)
• code-server v4.111.0 + Copilot Chat v0.39.2026030507 (March 2026)
• Both show same errors: API proposals not found, "No default agent registered"

Question for the community:

Is there a fundamental incompatibility between code-server and Copilot versions with agent mode (Feb
2025+)?

It appears that all Copilot versions released after agent mode require VS Code APIs that code-server
doesn't support. Can anyone confirm if they've successfully run Copilot with agent mode on code-server?

If this is a known limitation, what's the recommended approach:

1. Wait for code-server to implement the missing APIs?
2. Stick with pre-2025 Copilot versions (no agent mode)?
3. Use alternative solutions (official VS Code Server, Codespaces, etc.)?

Thanks for any insights!

[WeBeautifulNow]

@code-asher could you help on this? thanks a lot

[code-asher]

I am not able to help unfortunately, since installing it on OSS builds of VS Code is a violation of their license (as far as I know).

[WeBeautifulNow]

Partially Working - Seeking Better Version Combination

I found this combination partially works on code-server v4.102.0-rc.1:

code-server: v4.102.0-rc.1
GitHub Copilot: 1.343.1676
GitHub Copilot Chat: 0.29.0

What works: Chat responses, agent mode (editAgent), code generation

Issues:

• UI login button doesn't work properly
• Some authentication flow issues

Questions

1. Is there a more stable/newer version combination that works better on code-server? I'd like to use a more recent version if
possible while maintaining stability.
2. About the navigator is now a global in nodejs error:
- Why does this error occur?
- I see it appears in Node.js v22 (bundled with code-server v4.102+)
- v0.29.0 tolerates it (non-fatal), but v0.38+ crashes from it
- Is there a way to completely fix this error, rather than just tolerating it?
3. Root cause understanding:
- Is this a Node.js v21+ breaking change?
- Is it a code-server-specific issue, or does it affect VS Code OSS in general?
- Are there plans to fix this in either code-server or Copilot extension?

Any insights would be appreciated. Thanks!

[hocinehacherouf]

Hi all,

On code-server 4.140.0, Copilot Chat works for us with these two settings:

"chat.editor.preferCopilotHarness": true,
"chat.defaultToCopilotHarness": true

Reload the window and start a new chat.

Without them, models show up but every prompt hangs on "Considering…". code-server uses the "Local" chat mode by default, and in our setup (code-server served by Coder under a sub-path, e.g. https://our-domain/@user/workspace/apps/code-server/) the Copilot extension's GitHub login fails in that mode. These settings switch chat to the Copilot (Agent Host) mode, which logs in fine.

They're marked experimental, so re-test after upgrades. Upstream report: microsoft/vscode#339695

Hope this helps!