fix(provider-usage): ignore unsupported provider snapshots

- return null for cursor and opencode usage derivation
- keep claudeagent and codex snapshot detection unchanged

Author: tyulyukov

apps/web/src/lib/providerUsage.test.ts

@@ -274,4 +274,62 @@ describe("providerUsage", () => {
 
     expect(snapshot).toBeNull();
   });
+
+  it("returns null for cursor provider even when Claude/Codex events are present", () => {
+    const snapshot = deriveLatestProviderUsageSnapshot(
+      [
+        makeActivity("activity-1", {
+          type: "rate_limit_event",
+          rate_limit_info: {
+            status: "allowed_warning",
+            resetsAt: 1776582000,
+            rateLimitType: "five_hour",
+            utilization: 0.83,
+          },
+        }),
+        makeActivity("activity-2", {
+          rateLimits: {
+            limitId: "codex",
+            primary: {
+              usedPercent: 12,
+              windowDurationMins: 300,
+              resetsAt: 1776587601,
+            },
+          },
+        }),
+      ],
+      { provider: "cursor" },
+    );
+
+    expect(snapshot).toBeNull();
+  });
+
+  it("returns null for opencode provider even when Claude/Codex events are present", () => {
+    const snapshot = deriveLatestProviderUsageSnapshot(
+      [
+        makeActivity("activity-1", {
+          type: "rate_limit_event",
+          rate_limit_info: {
+            status: "allowed_warning",
+            resetsAt: 1776582000,
+            rateLimitType: "five_hour",
+            utilization: 0.83,
+          },
+        }),
+        makeActivity("activity-2", {
+          rateLimits: {
+            limitId: "codex",
+            primary: {
+              usedPercent: 12,
+              windowDurationMins: 300,
+              resetsAt: 1776587601,
+            },
+          },
+        }),
+      ],
+      { provider: "opencode" },
+    );
+
+    expect(snapshot).toBeNull();
+  });
 });

apps/web/src/lib/providerUsage.ts

@@ -36,9 +36,11 @@ type ProviderUsageDerivationOptions = {
   readonly provider?: ProviderKind | null;
 };
 
-const PROVIDER_LABEL_BY_KIND: Partial<Record<ProviderKind, string>> = {
+const PROVIDER_LABEL_BY_KIND: Record<ProviderKind, string | null> = {
   claudeAgent: "Claude",
   codex: "Codex",
+  cursor: null,
+  opencode: null,
 };
 
 // ---------------------------------------------------------------------------
@@ -287,12 +289,14 @@ export function deriveLatestProviderUsageSnapshot(
   activities: ReadonlyArray<OrchestrationThreadActivity>,
   options: ProviderUsageDerivationOptions = {},
 ): ProviderUsageSnapshot | null {
+  if (options.provider && PROVIDER_LABEL_BY_KIND[options.provider] === null) {
+    return null;
+  }
+
   const windowsByLabel = new Map<string, RateLimitWindow>();
   let providerLabel: string | null = null;
   let latestUpdatedAt: string | null = null;
-  const requestedProviderLabel = options.provider
-    ? (PROVIDER_LABEL_BY_KIND[options.provider] ?? null)
-    : null;
+  const requestedProviderLabel = options.provider ? PROVIDER_LABEL_BY_KIND[options.provider] : null;
 
   // Walk backwards so the first match for each label wins (most recent).
   for (let index = activities.length - 1; index >= 0; index -= 1) {