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!