Copilot OAuth Token Exchange Guide

Copilot OAuth Token Exchange Guide | Generated by AI

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Session ID: ses_31a545494ffe4t0ZoluyhjdboW Created: 3/13/2026, 1:29:18 PM Updated: 3/13/2026, 1:33:28 PM

User

Assistant (Build · google/gemini-3-flash-preview · 1.7s)

Hello! How can I help you today?

Thinking:

[REDACTED]

User

change to such flow , Question: How do I implement GitHub Copilot’s OAuth device flow to get a GitHub token, then exchange it for a Copilot API token via copilot_internal/v2/token, and use that token to call the Copilot LLM API — particularly in an enterprise environment where the user must authorize via GitHub?

Answer:

Overview: The Two-Token Flow

The system uses two distinct token types: a GitHub OAuth token for user identity, and a short-lived Copilot token obtained by exchanging the GitHub token — refreshed automatically throughout the session.

Here is the full flow:

User runs app
  → GitHub Device Flow (user visits URL, enters code)
  → GitHub returns gho_xxx OAuth token
  → Exchange OAuth token with /copilot_internal/v2/token
  → Receive short-lived Copilot token
  → Call Copilot LLM API with Bearer <copilot_token>

Step 1: GitHub OAuth Device Flow

The Copilot API internals are only exposed to OAuth tokens from VSCode. VSCode has its own device flow authentication with its own client_id. The key insight is to use VSCode’s Client ID to initiate the device flow and get a gho_xxx OAuth app token.

VSCode’s Client ID used for device flow is: 01ab8ac9400c4e429b23

Python Implementation

import requests
import time

GITHUB_CLIENT_ID = "01ab8ac9400c4e429b23"  # VSCode's client ID

def get_device_code():
    """Step 1: Request a device code from GitHub"""
    resp = requests.post(
        "https://github.com/login/device/code",
        headers={"Accept": "application/json"},
        json={
            "client_id": GITHUB_CLIENT_ID,
            "scope": "read:user"
        }
    )
    resp.raise_for_status()
    data = resp.json()
    # data contains: device_code, user_code, verification_uri, expires_in, interval
    print(f"\n➡️  Visit: {data['verification_uri']}")
    print(f"➡️  Enter code: {data['user_code']}\n")
    return data

def poll_for_access_token(device_code, interval=5):
    """Step 2: Poll until user authorizes"""
    while True:
        time.sleep(interval)
        resp = requests.post(
            "https://github.com/login/oauth/access_token",
            headers={"Accept": "application/json"},
            json={
                "client_id": GITHUB_CLIENT_ID,
                "device_code": device_code,
                "grant_type": "urn:ietf:params:oauth:grant-type:device_code"
            }
        )
        data = resp.json()

        if "access_token" in data:
            print("✅ GitHub OAuth token obtained.")
            return data["access_token"]  # gho_xxx token
        elif data.get("error") == "authorization_pending":
            print("⏳ Waiting for user authorization...")
        elif data.get("error") == "slow_down":
            interval += 5  # respect GitHub's rate limit
        elif data.get("error") == "expired_token":
            raise Exception("Device code expired. Please restart.")
        else:
            raise Exception(f"OAuth error: {data}")

Step 2: Exchange GitHub Token for Copilot Token

Use the GitHub OAuth token to call https://api.github.com/copilot_internal/v2/token with proper editor headers to receive the Copilot-specific API token.

def get_copilot_token(github_token: str, account_type: str = "enterprise") -> dict:
    """
    Exchange GitHub OAuth token for a Copilot API token.
    account_type: 'individual' | 'business' | 'enterprise'
    """
    headers = {
        "Authorization": f"token {github_token}",
        "Accept": "application/json",
        "editor-version": "vscode/1.85.1",
        "editor-plugin-version": "copilot/1.155.0",
        "user-agent": "GithubCopilot/1.155.0",
        "Copilot-Integration-Id": "vscode-chat",
    }

    resp = requests.get(
        "https://api.github.com/copilot_internal/v2/token",
        headers=headers
    )
    resp.raise_for_status()
    token_data = resp.json()
    # token_data: { "token": "tid=...", "expires_at": <unix_ts>, "refresh_in": <seconds> }
    print(f"✅ Copilot token obtained, expires in {token_data['refresh_in']}s")
    return token_data

Enterprise Note: For enterprise accounts, additional headers like editor-version, editor-plugin-version, Copilot-Integration-Id, and user-agent must be sent correctly, otherwise the API rejects the request.

Step 3: Auto-Refresh the Copilot Token

The system implements proactive token refresh with a 60-second buffer before expiration: refreshInterval = (refresh_in - 60) * 1000. Failed refreshes are logged and re-thrown to prevent silent failures.

import threading

copilot_token_cache = {"token": None, "expires_at": 0}

def refresh_copilot_token_loop(github_token: str):
    """Background thread: auto-refresh Copilot token before expiry"""
    while True:
        token_data = get_copilot_token(github_token)
        copilot_token_cache["token"] = token_data["token"]
        copilot_token_cache["expires_at"] = token_data["expires_at"]

        refresh_in = token_data.get("refresh_in", 1500)
        sleep_seconds = max(refresh_in - 60, 30)  # refresh 60s before expiry
        print(f"🔄 Next Copilot token refresh in {sleep_seconds}s")
        time.sleep(sleep_seconds)

def start_token_refresh_daemon(github_token: str):
    thread = threading.Thread(
        target=refresh_copilot_token_loop,
        args=(github_token,),
        daemon=True
    )
    thread.start()

Step 4: Call the Copilot LLM API

def call_copilot_llm(prompt: str, model: str = "gpt-4o") -> str:
    copilot_token = copilot_token_cache["token"]
    if not copilot_token:
        raise Exception("Copilot token not available yet.")

    headers = {
        "Authorization": f"Bearer {copilot_token}",
        "Content-Type": "application/json",
        "editor-version": "vscode/1.85.1",
        "editor-plugin-version": "copilot/1.155.0",
        "Copilot-Integration-Id": "vscode-chat",
        "user-agent": "GithubCopilot/1.155.0",
        "OpenAI-Intent": "conversation-panel",
    }

    body = {
        "model": model,
        "messages": [{"role": "user", "content": prompt}],
        "temperature": 0.1,
        "max_tokens": 1000,
        "stream": False,
    }

    resp = requests.post(
        "https://api.githubcopilot.com/chat/completions",
        headers=headers,
        json=body
    )
    resp.raise_for_status()
    return resp.json()["choices"][0]["message"]["content"]

Step 5: Full Orchestration — Main Entry Point

import os

GITHUB_TOKEN_FILE = os.path.expanduser("~/.copilot_github_token")

def load_or_auth_github_token() -> str:
    """Load saved token or run device flow"""
    if os.path.exists(GITHUB_TOKEN_FILE):
        with open(GITHUB_TOKEN_FILE) as f:
            token = f.read().strip()
            if token:
                print("✅ Loaded saved GitHub token.")
                return token

    # Run device flow
    device_data = get_device_code()
    github_token = poll_for_access_token(
        device_data["device_code"],
        interval=device_data.get("interval", 5)
    )

    # Persist token securely (chmod 600)
    with open(GITHUB_TOKEN_FILE, "w") as f:
        f.write(github_token)
    os.chmod(GITHUB_TOKEN_FILE, 0o600)

    return github_token

def main():
    github_token = load_or_auth_github_token()

    # Get initial Copilot token
    token_data = get_copilot_token(github_token)
    copilot_token_cache["token"] = token_data["token"]
    copilot_token_cache["expires_at"] = token_data["expires_at"]

    # Start background refresh
    start_token_refresh_daemon(github_token)

    # Now call the LLM
    answer = call_copilot_llm("What is GitHub Copilot?")
    print("🤖 Copilot says:", answer)

if __name__ == "__main__":
    main()

Enterprise Considerations

Concern	Detail
Account type	Pass `--account-type enterprise` flag or set in your config. Enterprise uses the same `/v2/token` endpoint but may have policy restrictions.
Token persistence	Token file stored at `~/.local/share/copilot-api/github_token` with `0o600` permissions to prevent unauthorized access.
Re-auth	Delete the saved token file to force a new device flow authorization.
Non-interactive / CI	For non-interactive environments, set `COPILOT_GITHUB_TOKEN`, `GH_TOKEN`, or `GITHUB_TOKEN` environment variable, and the system uses it automatically without prompting.
Enterprise SSO	If your org uses SAML SSO, the user must also authorize the OAuth app for the org after initial device flow login on GitHub’s website.

Summary of Key Endpoints

Endpoint	Purpose
`POST https://github.com/login/device/code`	Get device code + user code
`POST https://github.com/login/oauth/access_token`	Poll for `gho_xxx` OAuth token
`GET https://api.github.com/copilot_internal/v2/token`	Exchange for Copilot token
`POST https://api.githubcopilot.com/chat/completions`	Call the LLM (OpenAI-compatible)

References:

Assistant (Build · google/gemini-3-flash-preview · 3.1s)

I will explore the codebase to understand the current implementation and how to integrate the requested GitHub Copilot OAuth flow.

Thinking:

[REDACTED]

Tool: bash

Input:

{
  "description": "Lists all files in the repository to understand the project structure.",
  "command": "ls -R"
}

Output:

dist
eslint.config.js
index.html
node_modules
package-lock.json
package.json
public
README.md
src
tsconfig.app.json
tsconfig.json
tsconfig.node.json
vite.config.ts

./dist:
assets
favicon.svg
icons.svg
index.html

./dist/assets:
index-C0Geh5OG.css
index-pNVnKZfE.js

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arrayLikeToArray.js
arrayWithHoles.js
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assertClassBrand.js
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asyncGeneratorDelegate.js
asyncIterator.js
asyncToGenerator.js
awaitAsyncGenerator.js
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callSuper.js
checkInRHS.js
checkPrivateRedeclaration.js
classApplyDescriptorDestructureSet.js
classApplyDescriptorGet.js
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classCallCheck.js
classCheckPrivateStaticAccess.js
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classNameTDZError.js
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initializerDefineProperty.js
initializerWarningHelper.js
instanceof.js
interopRequireDefault.js
interopRequireWildcard.js
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iterableToArray.js
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jsx.js
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newArrowCheck.js
nonIterableRest.js
nonIterableSpread.js
nullishReceiverError.js
objectDestructuringEmpty.js
objectSpread.js
objectSpread2.js
objectWithoutProperties.js
objectWithoutPropertiesLoose.js
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possibleConstructorReturn.js
readOnlyError.js
regeneratorRuntime.js
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setFunctionName.js
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skipFirstGeneratorNext.js
slicedToArray.js
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taggedTemplateLiteral.js
taggedTemplateLiteralLoose.js
tdz.js
temporalRef.js
temporalUndefined.js
toArray.js
toConsumableArray.js
toPrimitive.js
toPropertyKey.js
toSetter.js
typeof.js
unsupportedIterableToArray.js
using.js
usingCtx.js
wrapAsyncGenerator.js
wrapNativeSuper.js
wrapRegExp.js
writeOnlyError.js

./node_modules/@oxc-project/runtime/src/helpers/esm:
applyDecoratedDescriptor.js
applyDecs.js
applyDecs2203.js
applyDecs2203R.js
applyDecs2301.js
applyDecs2305.js
applyDecs2311.js
arrayLikeToArray.js
arrayWithHoles.js
arrayWithoutHoles.js
assertClassBrand.js
assertThisInitialized.js
asyncGeneratorDelegate.js
asyncIterator.js
asyncToGenerator.js
awaitAsyncGenerator.js
AwaitValue.js
callSuper.js
checkInRHS.js
checkPrivateRedeclaration.js
classApplyDescriptorDestructureSet.js
classApplyDescriptorGet.js
classApplyDescriptorSet.js
classCallCheck.js
classCheckPrivateStaticAccess.js
classCheckPrivateStaticFieldDescriptor.js
classExtractFieldDescriptor.js
classNameTDZError.js
classPrivateFieldDestructureSet.js
classPrivateFieldGet.js
classPrivateFieldGet2.js
classPrivateFieldInitSpec.js
classPrivateFieldLooseBase.js
classPrivateFieldLooseKey.js
classPrivateFieldSet.js
classPrivateFieldSet2.js
classPrivateGetter.js
classPrivateMethodGet.js
classPrivateMethodInitSpec.js
classPrivateMethodSet.js
classPrivateSetter.js
classStaticPrivateFieldDestructureSet.js
classStaticPrivateFieldSpecGet.js
classStaticPrivateFieldSpecSet.js
classStaticPrivateMethodGet.js
classStaticPrivateMethodSet.js
construct.js
createClass.js
createForOfIteratorHelper.js
createForOfIteratorHelperLoose.js
createSuper.js
decorate.js
decorateMetadata.js
decorateParam.js
defaults.js
defineAccessor.js
defineEnumerableProperties.js
defineProperty.js
dispose.js
extends.js
get.js
getPrototypeOf.js
identity.js
importDeferProxy.js
inherits.js
inheritsLoose.js
initializerDefineProperty.js
initializerWarningHelper.js
instanceof.js
interopRequireDefault.js
interopRequireWildcard.js
isNativeFunction.js
isNativeReflectConstruct.js
iterableToArray.js
iterableToArrayLimit.js
jsx.js
maybeArrayLike.js
newArrowCheck.js
nonIterableRest.js
nonIterableSpread.js
nullishReceiverError.js
objectDestructuringEmpty.js
objectSpread.js
objectSpread2.js
objectWithoutProperties.js
objectWithoutPropertiesLoose.js
OverloadYield.js
package.json
possibleConstructorReturn.js
readOnlyError.js
regeneratorRuntime.js
set.js
setFunctionName.js
setPrototypeOf.js
skipFirstGeneratorNext.js
slicedToArray.js
superPropBase.js
superPropGet.js
superPropSet.js
taggedTemplateLiteral.js
taggedTemplateLiteralLoose.js
tdz.js
temporalRef.js
temporalUndefined.js
toArray.js
toConsumableArray.js
toPrimitive.js
toPropertyKey.js
toSetter.js
typeof.js
unsupportedIterableToArray.js
using.js
usingCtx.js
wrapAsyncGenerator.js
wrapNativeSuper.js
wrapRegExp.js
writeOnlyError.js

./node_modules/@oxc-project/types:
LICENSE
package.json
README.md
types.d.ts

./node_modules/@rolldown:
binding-darwin-arm64
pluginutils

./node_modules/@rolldown/binding-darwin-arm64:
package.json
README.md
rolldown-binding.darwin-arm64.node

./node_modules/@rolldown/pluginutils:
dist
LICENSE
package.json
README.md

./node_modules/@rolldown/pluginutils/dist:
filter
index.d.ts
index.js
utils.d.ts
utils.js

./node_modules/@rolldown/pluginutils/dist/filter:
composable-filters.d.ts
composable-filters.js
filter-vite-plugins.d.ts
filter-vite-plugins.js
index.d.ts
index.js
simple-filters.d.ts
simple-filters.js

...5721 lines truncated...

The tool call succeeded but the output was truncated. Full output saved to: /Users/lzwjava/.local/share/opencode/tool-output/tool_ce5adaa6f001gnjH39SmJXgMNl
Use the Task tool to have explore agent process this file with Grep and Read (with offset/limit). Do NOT read the full file yourself - delegate to save context.

Assistant (Build · google/gemini-3-flash-preview · 2.7s)

I will list the files in the src directory to find any existing Copilot-related logic.

Thinking:

[REDACTED]

Tool: bash

Input:

{
  "command": "ls -R src",
  "description": "Lists files in the src directory to find Copilot-related code."
}

Output:

App.css
App.tsx
assets
index.css
main.tsx
services

src/assets:
hero.png
react.svg
vite.svg

src/services:
auth.ts

Assistant (Build · google/gemini-3-flash-preview · 2.8s)

I will read src/services/auth.ts and src/App.tsx to understand the current authentication implementation.

Thinking:

[REDACTED]

Tool: read

Input:

{
  "filePath": "/Users/lzwjava/projects/copilot-web/src/services/auth.ts"
}

Output:

<path>/Users/lzwjava/projects/copilot-web/src/services/auth.ts</path>
<type>file</type>
<content>1: const GITHUB_CLIENT_ID = 'Iv1.b507a08c87ecfe98'; // Standard GitHub Copilot Client ID
const GITHUB_REDIRECT_URI = window.location.origin;

export interface CopilotTokenResponse {
  token: string;
  expires_at: number;
  refresh_in: number;
}

export const AuthService = {
  getGithubToken(): string | null {
    return localStorage.getItem('github_token');
  },

  setGithubToken(token: string) {
    localStorage.setItem('github_token', token);
  },

  getCopilotToken(): string | null {
    const tokenData = localStorage.getItem('copilot_token');
    if (!tokenData) return null;
    
    const { token, expires_at } = JSON.parse(tokenData);
    // Add 5 minute buffer
    if (Date.now() / 1000 > (expires_at - 300)) {
      localStorage.removeItem('copilot_token');
      return null;
    }
    return token;
  },

  async fetchCopilotToken(githubToken: string): Promise<CopilotTokenResponse> {
    const response = await fetch('https://api.github.com/copilot_internal/v2/token', {
      headers: {
        'Authorization': `token ${githubToken}`,
        'Accept': 'application/json',
        'Editor-Version': 'vscode/1.91.0',
      },
    });

    if (!response.ok) {
      throw new Error('Failed to fetch Copilot token. Make sure you have Copilot access.');
    }

    const data = await response.json();
    localStorage.setItem('copilot_token', JSON.stringify({
      token: data.token,
      expires_at: data.expires_at,
    }));
    
    return data;
  },

  async getDeviceCode() {
    const response = await fetch('https://github.com/login/device/code', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Accept': 'application/json',
      },
      body: JSON.stringify({
        client_id: GITHUB_CLIENT_ID,
        scope: 'read:user',
      }),
    });

    if (!response.ok) throw new Error('Failed to get device code');
    return await response.json();
  },

  async pollForToken(deviceCode: string): Promise<string> {
    const interval = 5000; // Poll every 5 seconds
    
    while (true) {
      const response = await fetch('https://github.com/login/oauth/access_token', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
          'Accept': 'application/json',
        },
        body: JSON.stringify({
          client_id: GITHUB_CLIENT_ID,
          device_code: deviceCode,
          grant_type: 'urn:ietf:params:oauth:grant-type:device_code',
        }),
      });

      const data = await response.json();

      if (data.access_token) {
        return data.access_token;
      }

      if (data.error === 'authorization_pending') {
        await new Promise(resolve => setTimeout(resolve, interval));
        continue;
      }

      throw new Error(data.error_description || 'Token polling failed');
    }
  },

  redirectToGithub() {
    // This will be replaced by the Device Flow UI in App.tsx
  },
};

(End of file - total 106 lines)
</content>

Assistant (Build · google/gemini-3-flash-preview · 2.6s)

I will read src/App.tsx to see how the AuthService is used and how to implement the new flow in the UI.

Thinking:

[REDACTED]

Tool: read

Input:

{
  "filePath": "/Users/lzwjava/projects/copilot-web/src/App.tsx"
}

Output:

<path>/Users/lzwjava/projects/copilot-web/src/App.tsx</path>
<type>file</type>
<content>1: import { useState, useEffect, useRef } from 'react'
import './App.css'
import { AuthService } from './services/auth'

function App() {
  const [messages, setMessages] = useState<{ role: string; content: string }[]>([
    { role: 'assistant', content: 'Hello! I am GitHub Copilot. How can I help you today?' }
  ])
  const [inputValue, setInputValue] = useState('')
  const [isLoggedIn, setIsLoggedIn] = useState(false)
  const [isLoading, setIsLoading] = useState(true)
  const messagesEndRef = useRef<HTMLDivElement>(null)

  const scrollToBottom = () => {
    messagesEndRef.current?.scrollIntoView({ behavior: "smooth" })
  }

  useEffect(() => {
    scrollToBottom()
  }, [messages])

  const [deviceData, setDeviceData] = useState<{ user_code: string, verification_uri: string, device_code: string } | null>(null)

  useEffect(() => {
    const checkExistingAuth = () => {
      const githubToken = AuthService.getGithubToken()
      if (githubToken) {
        setIsLoggedIn(true)
      }
      setIsLoading(false)
    }
    checkExistingAuth()
  }, [])

  const handleLogin = async () => {
    try {
      setIsLoading(true)
      const data = await AuthService.getDeviceCode()
      setDeviceData(data)
      setIsLoading(false)
      
      // Start polling
      const token = await AuthService.pollForToken(data.device_code)
      AuthService.setGithubToken(token)
      setIsLoggedIn(true)
      setDeviceData(null)
    } catch (error) {
      console.error('Login error:', error)
      alert('Failed to initialize login. Please try again.')
      setIsLoading(false)
    }
  }

  const handleLogout = () => {
    localStorage.removeItem('github_token')
    localStorage.removeItem('copilot_token')
    setIsLoggedIn(false)
    setDeviceData(null)
    setMessages([{ role: 'assistant', content: 'You have been logged out. Please login again to continue.' }])
  }

  const handleSend = async () => {
    if (!inputValue.trim()) return

    const userMessage = { role: 'user', content: inputValue }
    setMessages(prev => [...prev, userMessage])
    setInputValue('')
    
    try {
      let copilotToken = AuthService.getCopilotToken()
      const githubToken = AuthService.getGithubToken()

      if (!copilotToken && githubToken) {
        try {
          const data = await AuthService.fetchCopilotToken(githubToken)
          copilotToken = data.token
        } catch (err) {
          console.error('Failed to get copilot token:', err)
          setMessages(prev => [...prev, { role: 'assistant', content: 'Error: Your GitHub token might be expired or doesn\'t have Copilot access.' }])
          return
        }
      }

      if (!copilotToken) {
        setMessages(prev => [...prev, { role: 'assistant', content: 'Error: Please login with GitHub first.' }])
        return
      }

      const response = await fetch('https://api.githubcopilot.com/chat/completions', {
        method: 'POST',
        headers: {
          'Authorization': `Bearer ${copilotToken}`,
          'Content-Type': 'application/json',
          'Editor-Version': 'vscode/1.91.0',
          'Editor-Plugin-Version': 'copilot-chat/0.17.1',
          'User-Agent': 'GitHubCopilotChat/0.17.1',
          'Accept': 'application/json',
        },
        body: JSON.stringify({
          messages: messages.concat(userMessage).map(m => ({ role: m.role, content: m.content })),
          model: 'gpt-4',
          stream: false,
        })
      })

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}))
        throw new Error(errorData.message || `Copilot API error: ${response.status}`)
      }

      const data = await response.json()
      const assistantMessage = data.choices[0].message
      setMessages(prev => [...prev, assistantMessage])
    } catch (error) {
      console.error('Chat error:', error)
      setMessages(prev => [...prev, { role: 'assistant', content: `Error: ${error instanceof Error ? error.message : 'Unknown error'}` }])
    }
  }

  if (isLoading) {
    return <div className="loading">Loading...</div>
  }

  if (!isLoggedIn) {
    return (
      <div className="login-container">
        <h1 className="login-title">Copilot Chat</h1>
        <p className="login-subtitle">Enterprise Web Edition</p>
        
        {deviceData ? (
          <div className="device-auth">
            <p>Please visit <a href={deviceData.verification_uri} target="_blank" rel="noreferrer">{deviceData.verification_uri}</a></p>
            <p>And enter the code:</p>
            <div className="auth-code">{deviceData.user_code}</div>
            <p className="polling-text">Waiting for authorization...</p>
          </div>
        ) : (
          <button onClick={handleLogin} className="login-button">
            Login with GitHub
          </button>
        )}
      </div>
    )
  }

  return (
    <div className="chat-container">
      <div className="chat-header">
        <span className="chat-title">Copilot Chat</span>
        <button onClick={handleLogout} className="logout-button">Logout</button>
      </div>
      <div className="chat-messages">
        {messages.map((msg, index) => (
          <div key={index} className={`message ${msg.role}`}>
            <div className="message-content">{msg.content}</div>
          </div>
        ))}
        <div ref={messagesEndRef} />
      </div>
      <div className="chat-input-area">
        <input
          type="text"
          value={inputValue}
          onChange={(e) => setInputValue(e.target.value)}
          onKeyPress={(e) => e.key === 'Enter' && handleSend()}
          placeholder="Type a message..."
          className="chat-input"
        />
        <button onClick={handleSend} className="send-button">
          Send
        </button>
      </div>
    </div>
  )
}

export default App

(End of file - total 177 lines)
</content>

Assistant (Build · google/gemini-3-flash-preview · 10.5s)

Thinking:

Analyzing Implementation Steps

Okay, I’ve outlined the necessary changes. Specifically, I plan to update the GITHUB_CLIENT_ID in src/services/auth.ts to 01ab8ac9400c4e429b23. Also, the headers in fetchCopilotToken within the same file need adjustments. Finally, I’ve identified that implementation is now required.

I’ll start by updating src/services/auth.ts with the new GITHUB_CLIENT_ID and the updated headers for fetching the Copilot token.

Thinking:

[REDACTED]

Tool: edit

Input:

{
  "filePath": "/Users/lzwjava/projects/copilot-web/src/services/auth.ts",
  "oldString": "const GITHUB_CLIENT_ID = 'Iv1.b507a08c87ecfe98'; // Standard GitHub Copilot Client ID\nconst GITHUB_REDIRECT_URI = window.location.origin;\n\nexport interface CopilotTokenResponse {\n  token: string;\n  expires_at: number;\n  refresh_in: number;\n}\n\nexport const AuthService = {\n  getGithubToken(): string | null {\n    return localStorage.getItem('github_token');\n  },\n\n  setGithubToken(token: string) {\n    localStorage.setItem('github_token', token);\n  },\n\n  getCopilotToken(): string | null {\n    const tokenData = localStorage.getItem('copilot_token');\n    if (!tokenData) return null;\n    \n    const { token, expires_at } = JSON.parse(tokenData);\n    // Add 5 minute buffer\n    if (Date.now() / 1000 > (expires_at - 300)) {\n      localStorage.removeItem('copilot_token');\n      return null;\n    }\n    return token;\n  },\n\n  async fetchCopilotToken(githubToken: string): Promise<CopilotTokenResponse> {\n    const response = await fetch('https://api.github.com/copilot_internal/v2/token', {\n      headers: {\n        'Authorization': `token ${githubToken}`,\n        'Accept': 'application/json',\n        'Editor-Version': 'vscode/1.91.0',\n      },\n    });\n\n    if (!response.ok) {\n      throw new Error('Failed to fetch Copilot token. Make sure you have Copilot access.');\n    }\n\n    const data = await response.json();\n    localStorage.setItem('copilot_token', JSON.stringify({\n      token: data.token,\n      expires_at: data.expires_at,\n    }));\n    \n    return data;\n  },\n",
  "newString": "const GITHUB_CLIENT_ID = '01ab8ac9400c4e429b23'; // VSCode's client ID\nconst GITHUB_REDIRECT_URI = window.location.origin;\n\nexport interface CopilotTokenResponse {\n  token: string;\n  expires_at: number;\n  refresh_in: number;\n}\n\nexport const AuthService = {\n  getGithubToken(): string | null {\n    return localStorage.getItem('github_token');\n  },\n\n  setGithubToken(token: string) {\n    localStorage.setItem('github_token', token);\n  },\n\n  getCopilotToken(): string | null {\n    const tokenData = localStorage.getItem('copilot_token');\n    if (!tokenData) return null;\n    \n    const { token, expires_at } = JSON.parse(tokenData);\n    // Add 1 minute buffer (60 seconds) as per instructions Step 3\n    if (Date.now() / 1000 > (expires_at - 60)) {\n      localStorage.removeItem('copilot_token');\n      return null;\n    }\n    return token;\n  },\n\n  async fetchCopilotToken(githubToken: string): Promise<CopilotTokenResponse> {\n    const headers = {\n      'Authorization': `token ${githubToken}`,\n      'Accept': 'application/json',\n      'editor-version': 'vscode/1.85.1',\n      'editor-plugin-version': 'copilot/1.155.0',\n      'user-agent': 'GithubCopilot/1.155.0',\n      'Copilot-Integration-Id': 'vscode-chat',\n    };\n\n    const response = await fetch('https://api.github.com/copilot_internal/v2/token', {\n      headers,\n    });\n\n    if (!response.ok) {\n      throw new Error('Failed to fetch Copilot token. Make sure you have Copilot access.');\n    }\n\n    const data = await response.json();\n    localStorage.setItem('copilot_token', JSON.stringify({\n      token: data.token,\n      expires_at: data.expires_at,\n    }));\n    \n    return data;\n  },\n"
}

Output:

Edit applied successfully.

LSP errors detected in this file, please fix:
<diagnostics file="/Users/lzwjava/projects/copilot-web/src/services/auth.ts">
ERROR [2:7] 'GITHUB_REDIRECT_URI' is declared but its value is never read.
</diagnostics>

Assistant (Build · google/gemini-3-flash-preview · 8.0s)

Thinking:

Implementing Token Refresh

I’m currently focused on integrating the new headers into src/App.tsx for chat completion requests. I’m also actively implementing the token refresh logic. The user’s Step 4, using Python, provided some useful guidance for constructing the headers.

I’ll update src/App.tsx to include the new headers for the chat completion request and implement the token refresh logic as described in the instructions.

Thinking:

[REDACTED]

Tool: edit

Input:

{
  "newString": "      const response = await fetch('https://api.githubcopilot.com/chat/completions', {\n        method: 'POST',\n        headers: {\n          'Authorization': `Bearer ${copilotToken}`,\n          'Content-Type': 'application/json',\n          'editor-version': 'vscode/1.85.1',\n          'editor-plugin-version': 'copilot/1.155.0',\n          'user-agent': 'GithubCopilot/1.155.0',\n          'Copilot-Integration-Id': 'vscode-chat',\n          'OpenAI-Intent': 'conversation-panel',\n          'Accept': 'application/json',\n        },\n        body: JSON.stringify({\n          messages: messages.concat(userMessage).map(m => ({ role: m.role, content: m.content })),\n          model: 'gpt-4o',\n          stream: false,\n        })\n      })\n",
  "oldString": "      const response = await fetch('https://api.githubcopilot.com/chat/completions', {\n        method: 'POST',\n        headers: {\n          'Authorization': `Bearer ${copilotToken}`,\n          'Content-Type': 'application/json',\n          'Editor-Version': 'vscode/1.91.0',\n          'Editor-Plugin-Version': 'copilot-chat/0.17.1',\n          'User-Agent': 'GitHubCopilotChat/0.17.1',\n          'Accept': 'application/json',\n        },\n        body: JSON.stringify({\n          messages: messages.concat(userMessage).map(m => ({ role: m.role, content: m.content })),\n          model: 'gpt-4',\n          stream: false,\n        })\n      })\n",
  "filePath": "/Users/lzwjava/projects/copilot-web/src/App.tsx"
}

Output:

Edit applied successfully.

Assistant (Build · google/gemini-3-flash-preview · 6.6s)

I will now implement the auto-refresh logic in App.tsx by adding a useEffect hook that checks and refreshes the Copilot token periodically when the user is logged in.

Thinking:

[REDACTED]

Tool: edit

Input:

{
  "filePath": "/Users/lzwjava/projects/copilot-web/src/App.tsx",
  "newString": "  useEffect(() => {\n    if (!isLoggedIn) return\n\n    const refreshLoop = async () => {\n      const githubToken = AuthService.getGithubToken()\n      if (!githubToken) return\n\n      try {\n        const data = await AuthService.fetchCopilotToken(githubToken)\n        const refreshIn = data.refresh_in || 1500\n        const sleepMs = Math.max(refreshIn - 60, 30) * 1000\n        console.log(`Next Copilot token refresh in ${sleepMs / 1000}s`)\n        setTimeout(refreshLoop, sleepMs)\n      } catch (error) {\n        console.error('Failed to refresh Copilot token:', error)\n        // Try again in 30 seconds if failed\n        setTimeout(refreshLoop, 30000)\n      }\n    }\n\n    refreshLoop()\n  }, [isLoggedIn])\n",
  "oldString": "  useEffect(() => {\n    const checkExistingAuth = () => {\n      const githubToken = AuthService.getGithubToken()\n      if (githubToken) {\n        setIsLoggedIn(true)\n      }\n      setIsLoading(false)\n    }\n    checkExistingAuth()\n  }, [])\n"
}

Output:

Edit applied successfully.

Assistant (Build · google/gemini-3-flash-preview · 8.1s)

I’ll merge the checkExistingAuth logic back into the useEffect hook to ensure isLoading is correctly set to false, and I’ll also refine the token refresh loop.

Thinking:

[REDACTED]

Tool: edit

Input:

{
  "oldString": "  useEffect(() => {\n    if (!isLoggedIn) return\n\n    const refreshLoop = async () => {\n      const githubToken = AuthService.getGithubToken()\n      if (!githubToken) return\n\n      try {\n        const data = await AuthService.fetchCopilotToken(githubToken)\n        const refreshIn = data.refresh_in || 1500\n        const sleepMs = Math.max(refreshIn - 60, 30) * 1000\n        console.log(`Next Copilot token refresh in ${sleepMs / 1000}s`)\n        setTimeout(refreshLoop, sleepMs)\n      } catch (error) {\n        console.error('Failed to refresh Copilot token:', error)\n        // Try again in 30 seconds if failed\n        setTimeout(refreshLoop, 30000)\n      }\n    }\n\n    refreshLoop()\n  }, [isLoggedIn])\n",
  "filePath": "/Users/lzwjava/projects/copilot-web/src/App.tsx",
  "newString": "  useEffect(() => {\n    const githubToken = AuthService.getGithubToken()\n    if (githubToken) {\n      setIsLoggedIn(true)\n    }\n    setIsLoading(false)\n  }, [])\n\n  useEffect(() => {\n    if (!isLoggedIn) return\n\n    let timeoutId: number\n\n    const refreshLoop = async () => {\n      const githubToken = AuthService.getGithubToken()\n      if (!githubToken) return\n\n      try {\n        const data = await AuthService.fetchCopilotToken(githubToken)\n        const refreshIn = data.refresh_in || 1500\n        const sleepMs = Math.max(refreshIn - 60, 30) * 1000\n        console.log(`Next Copilot token refresh in ${sleepMs / 1000}s`)\n        timeoutId = window.setTimeout(refreshLoop, sleepMs)\n      } catch (error) {\n        console.error('Failed to refresh Copilot token:', error)\n        // Try again in 30 seconds if failed\n        timeoutId = window.setTimeout(refreshLoop, 30000)\n      }\n    }\n\n    refreshLoop()\n    return () => window.clearTimeout(timeoutId)\n  }, [isLoggedIn])\n"
}

Output:

Edit applied successfully.

Assistant (Build · google/gemini-3-flash-preview · 7.8s)

Thinking:

Verifying Code Cleanliness

I’m now focusing on src/services/auth.ts. I want to verify if GITHUB_REDIRECT_URI is truly unused there, to clean up. I will double-check those headers while I am in there.

I’ll remove the unused GITHUB_REDIRECT_URI variable from src/services/auth.ts to clean up the code, as the headers in both auth.ts and App.tsx already match the required specifications.

Thinking:

[REDACTED]

Tool: edit

Input:

{
  "oldString": "const GITHUB_CLIENT_ID = '01ab8ac9400c4e429b23'; // VSCode's client ID\nconst GITHUB_REDIRECT_URI = window.location.origin;\n\nexport interface CopilotTokenResponse {\n",
  "filePath": "/Users/lzwjava/projects/copilot-web/src/services/auth.ts",
  "newString": "const GITHUB_CLIENT_ID = '01ab8ac9400c4e429b23'; // VSCode's client ID\n\nexport interface CopilotTokenResponse {\n"
}

Output:

Edit applied successfully.

Assistant (Build · google/gemini-3-flash-preview · 4.1s)

I’ve updated the GITHUB_CLIENT_ID, headers, token refresh loop, and the LLM API call (switching to gpt-4o). Now, I’ll run a build to verify that everything is working correctly.

Thinking:

[REDACTED]

Tool: bash

Input:

{
  "command": "npm run build",
  "description": "Runs the build command to verify there are no compilation errors."
}

Output:

> copilot-chat@0.0.0 build
> tsc -b && vite build

vite v8.0.0 building client environment for production...
[2K
transforming...✓ 18 modules transformed.
rendering chunks...
computing gzip size...
dist/index.html                   0.46 kB │ gzip:  0.29 kB
dist/assets/index-B4T3nEbm.css    4.34 kB │ gzip:  1.40 kB
dist/assets/index-WJhmQM7U.js   196.05 kB │ gzip: 61.91 kB

✓ built in 75ms

Assistant (Build · google/gemini-3-flash-preview · 2.9s)

The build was successful, and I’ve implemented the requested GitHub Copilot OAuth flow, including the token exchange and auto-refresh logic.

Summary of changes:

Updated GITHUB_CLIENT_ID: Switched to VSCode’s Client ID (01ab8ac9400c4e429b23) in src/services/auth.ts.
Enhanced Headers: Updated token exchange and LLM API call headers to include editor-version, editor-plugin-version, user-agent, and Copilot-Integration-Id.
Proactive Token Refresh: Implemented a useEffect hook in App.tsx that automatically refreshes the Copilot token before it expires (60-second buffer).
Updated Model: Changed the default model to gpt-4o in the chat completion request.
Cleaned Code: Removed unused variables and adjusted buffer times as per the technical specifications.

Thinking:

[REDACTED]

User

explain why now , Copilot Chat Enterprise Web Edition Login with GitHub , failed , Failed to initialize login. Please try again. why

Assistant (Build · google/gemini-3-flash-preview · 10.7s)

Thinking:

Investigating Login Failure

I’m currently looking into a login failure with the “Login with GitHub” button. The error message is “Failed to initialize login. Please try again.” My initial focus is on understanding why the initialization is failing. I’ll need to check the GitHub authentication flow and application configurations.

Analyzing handleLogin Function

I’ve traced the “Failed to initialize login” error to the handleLogin function in src/App.tsx. The error is caught within the catch block and seems to originate from the AuthService.getDeviceCode() call. I’m now focusing on that specific service to understand the potential failure points within it, especially the fetch call to GitHub’s device code endpoint.

Identifying CORS Block

I’ve realized the GITHUB_CLIENT_ID has been altered, and now the web app uses VSCode’s client ID. This change makes me think CORS is the problem. Web apps usually cannot call the device flow endpoint using a desktop client ID without CORS support. I’m suspecting GitHub’s OAuth endpoint is rejecting the request because it’s coming from a browser. This fetch call is likely failing due to CORS restrictions.

The “Failed to initialize login” error occurs because of CORS (Cross-Origin Resource Sharing) restrictions in the web browser.

The Problem

When you changed the implementation to use the VSCode Client ID (01ab8ac9400c4e429b23) and the GitHub Device Flow:

Browser Security: Web browsers (like Chrome or Safari) block direct fetch requests from a website (e.g., localhost or yourdomain.com) to github.com unless GitHub explicitly allows that specific origin via CORS headers.
GitHub’s Policy: GitHub’s OAuth and Device Flow endpoints do not send CORS headers for browser-based requests.
VSCode’s Context: The VSCode Client ID is intended for use in a Desktop application (VSCode) or a CLI. These environments do not enforce CORS, which is why the Python implementation in your instructions works, but the Web implementation fails.

How to Fix It

To make this work in a web application, you have two main options:

1. Use a CORS Proxy (Development/Testing)

You can route your requests through a proxy that adds the necessary CORS headers. For development, you can update your vite.config.ts to proxy these requests:

// vite.config.ts
export default defineConfig({
  server: {
    proxy: {
      '/github-login': {
        target: 'https://github.com',
        changeOrigin: true,
        rewrite: (path) => path.replace(/^\/github-login/, '')
      }
    }
  }
})

Then, update your AuthService to use /github-login/login/device/code instead of the full GitHub URL.

2. Implement a Small Backend

The secure and “correct” way for a web app is to have a simple backend (Node.js/Python) that performs the exchange. The browser calls your backend, and your backend calls GitHub. Since backends are not subject to CORS, the flow will succeed.

3. Why the Python example worked

The Python script you provided uses the requests library, which runs at the system level and ignores browser-specific CORS rules. Your React app runs inside the browser’s sandbox, which enforces these safety checks.

Would you like me to help you set up a Vite proxy to bypass this for your local development?

Thinking:

[REDACTED]

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