chore: proper auth handling (#65)

Co-authored-by: Shubham Naik <shub@memgpt.ai>

src/auth/oauth.ts

@@ -140,6 +140,7 @@ export async function refreshAccessToken(
       grant_type: "refresh_token",
       client_id: OAUTH_CONFIG.clientId,
       refresh_token: refreshToken,
+      refresh_token_mode: "new",
     }),
   });
 
@@ -154,6 +155,39 @@ export async function refreshAccessToken(
 }
 
 /**
+ * Revoke a refresh token (logout)
+ */
+export async function revokeToken(refreshToken: string): Promise<void> {
+  try {
+    const response = await fetch(
+      `${OAUTH_CONFIG.authBaseUrl}/api/oauth/revoke`,
+      {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          client_id: OAUTH_CONFIG.clientId,
+          token: refreshToken,
+          token_type_hint: "refresh_token",
+        }),
+      },
+    );
+
+    // OAuth 2.0 revoke endpoint should return 200 even if token is already invalid
+    if (!response.ok) {
+      const error = (await response.json()) as OAuthError;
+      console.error(
+        `Warning: Failed to revoke token: ${error.error_description || error.error}`,
+      );
+      // Don't throw - we still want to clear local credentials
+    }
+  } catch (error) {
+    console.error("Warning: Failed to revoke token:", error);
+    // Don't throw - we still want to clear local credentials
+  }
+}
+
+/**
+ * Validate credentials by checking health endpoint
  * Validate credentials by checking an authenticated endpoint
  * Uses SDK's agents.list() which requires valid authentication
  */

src/cli/App.tsx

@@ -669,7 +669,7 @@ export default function App({
             kind: "command",
             id: cmdId,
             input: msg,
-            output: "Clearing credentials...",
+            output: "Logging out...",
             phase: "running",
           });
           buffersRef.current.order.push(cmdId);
@@ -680,6 +680,14 @@ export default function App({
           try {
             const { settingsManager } = await import("../settings-manager");
             const currentSettings = settingsManager.getSettings();
+
+            // Revoke refresh token on server if we have one
+            if (currentSettings.refreshToken) {
+              const { revokeToken } = await import("../auth/oauth");
+              await revokeToken(currentSettings.refreshToken);
+            }
+
+            // Clear local credentials
             const newEnv = { ...currentSettings.env };
             delete newEnv.LETTA_API_KEY;
             // Note: LETTA_BASE_URL is intentionally NOT deleted from settings