fix(server): Claude subscriptions that can't read plan limits no longer claim to have none

apps/server/src/provider/ClaudeProvider.ts

@@ -266,7 +266,10 @@ export type ClaudeCapabilitiesProbe = {
   readonly slashCommands: ReadonlyArray<ServerProviderSlashCommand>;
   readonly models?: ReadonlyArray<ClaudeModelInfo>;
   /** Undefined means get_usage failed; absent windows on success mean no subscription windows, as with API keys. */
-  readonly usage?: Pick<SDKControlGetUsageResponse, "rate_limits_available" | "rate_limits">;
+  readonly usage?: Pick<
+    SDKControlGetUsageResponse,
+    "rate_limits_available" | "rate_limits" | "subscription_type"
+  >;
   readonly usageCheckedAt?: string;
 };
 
@@ -432,6 +435,7 @@ const probeClaudeCapabilities = (
             ? {
                 rate_limits_available: usageResult.success.rate_limits_available,
                 rate_limits: usageResult.success.rate_limits,
+                subscription_type: usageResult.success.subscription_type,
               }
             : undefined;
         const account = init.account as

apps/server/src/provider/claudeUsageLimits.test.ts

@@ -107,6 +107,22 @@ describe("claudeUsageResponseToLimits", () => {
     ]);
   });
 
+  it("treats a subscription sign-in without readable limits as a failed probe, not a plan without limits", () => {
+    // Claude Max OAuth whose token lacks `user:profile`, as answered by Claude Code 2.1.316.
+    const subscriber = {
+      subscription_type: "max",
+      rate_limits_available: false,
+      rate_limits: null,
+    };
+    expect(
+      claudeUsageResponseToLimits({ checkedAt, response: subscriber }).limits.unavailable?.reason,
+    ).toBe("probeFailed");
+    const apiKey = { ...subscriber, subscription_type: null };
+    expect(
+      claudeUsageResponseToLimits({ checkedAt, response: apiKey }).limits.unavailable?.reason,
+    ).toBe("unsupported");
+  });
+
   const enterpriseResponse = {
     rate_limits_available: true,
     rate_limits: {

apps/server/src/provider/claudeUsageLimits.ts

@@ -173,10 +173,23 @@ export function claudeRateLimitEventToUpdate(
 
 /** get_usage percentages are already 0-100. */
 export function claudeUsageResponseToLimits(input: {
-  readonly response: Pick<SDKControlGetUsageResponse, "rate_limits_available" | "rate_limits">;
+  readonly response: Pick<SDKControlGetUsageResponse, "rate_limits_available" | "rate_limits"> &
+    Partial<Pick<SDKControlGetUsageResponse, "subscription_type">>;
   readonly checkedAt: string;
 }): { readonly limits: ServerProviderUsageLimits; readonly names: ClaudeScopedLimitNames } {
   const { response, checkedAt } = input;
+  if (!response.rate_limits_available && response.subscription_type) {
+    // The CLI withholds limits from subscription tokens that lack the `user:profile` scope.
+    return {
+      limits: makeUnavailableUsageLimits({
+        checkedAt,
+        reason: "probeFailed",
+        message:
+          "Claude Code's sign-in can't read plan limits. Run `claude auth login` on the machine running T3 Code, using the Claude config directory from T3 Code's Claude provider settings if one is set, to sign in again.",
+      }),
+      names: { overageIncluded: undefined },
+    };
+  }
   if (!response.rate_limits_available || !response.rate_limits) {
     return {
       limits: makeUnavailableUsageLimits({