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Provides authentication troubleshooting for MSAL, JWT, and Entra ID. Use when debugging 401 errors, token issues, MSAL configuration problems, or credential failures in this repository.
Provides deployment commands and troubleshooting for Azure Container Apps. Use when running azd commands, deploying containers, debugging deployment failures, or updating infrastructure in this repository.
Provides research patterns for Azure AI Foundry Agent Service SDK. Use when implementing agent features, looking up SDK methods, finding code samples, or troubleshooting Azure.AI.Projects API usage.
Provides Playwright MCP testing workflow for the web application. Use when testing UI changes, verifying chat functionality, debugging frontend issues, or validating state transitions in the browser.
Provides step-by-step procedures for validating UI features - theme toggle, new chat, cancel stream, markdown rendering, and token usage info.
Provides C# and ASP.NET Core coding standards for this repository. Use when writing or modifying C# code, implementing API endpoints, configuring middleware, or working with authentication in the backend. Use when writing or modifying C# code, implementing API endpoints,
Provides TypeScript and React coding standards for this repository. Use when writing or modifying TypeScript code, creating React components, implementing MSAL authentication, or working with the frontend.
| name | troubleshooting-authentication |
| description | Provides authentication troubleshooting for MSAL, JWT, and Entra ID. Use when debugging 401 errors, token issues, MSAL configuration problems, or credential failures in this repository. |
Chat.ReadWrite scope| Issue | Cause | Fix |
|---|---|---|
401 on /api/* | Token missing scope | Verify Chat.ReadWrite scope in token |
ManagedIdentityCredential error locally | Wrong environment | Set ASPNETCORE_ENVIRONMENT=Development |
| Token popup blocked | Browser settings | Allow popups for localhost |
| Silent token fails | No cached token | Fallback to popup (handled by useAuth) |
Accepts both audience formats:
options.TokenValidationParameters.ValidAudiences = new[]
{
builder.Configuration["AzureAd:ClientId"],
$"api://{builder.Configuration["AzureAd:ClientId"]}"
};
TokenCredential credential = env.IsDevelopment()
? new ChainedTokenCredential(
new AzureCliCredential(),
new AzureDeveloperCliCredential()) // Supports 'azd auth login'
: new ManagedIdentityCredential();
Local development: Requires az login or azd auth login to work.
Why ChainedTokenCredential: Avoids DefaultAzureCredential's unpredictable "fail fast" mode. Provides explicit, debuggable credential chain.
// Always try silent first
try {
const { accessToken } = await instance.acquireTokenSilent({
...tokenRequest,
account: accounts[0]
});
return accessToken;
} catch {
// Fallback to popup
const { accessToken } = await instance.acquireTokenPopup(tokenRequest);
return accessToken;
}
Chat.ReadWriteapi://{clientId}Frontend (.env.local):
VITE_ENTRA_SPA_CLIENT_ID=...
VITE_ENTRA_TENANT_ID=...
Backend (.env):
AzureAd__ClientId=...
AzureAd__TenantId=...
Regenerate: Run azd up to recreate Entra app and .env files.