diff --git a/packages/app/src/components/worktree-setup-callout-source.tsx b/packages/app/src/components/worktree-setup-callout-source.tsx
index 12d5957ea..b566c643b 100644
--- a/packages/app/src/components/worktree-setup-callout-source.tsx
+++ b/packages/app/src/components/worktree-setup-callout-source.tsx
@@ -53,6 +53,9 @@ export function WorktreeSetupCalloutSource() {
     if (!activeProject || !shouldShowWorktreeSetupCallout(readQuery.data)) {
       return null;
     }
+    if (importAvailability.status === "loading") {
+      return null;
+    }
     if (importAvailability.status === "one" && importAvailability.source) {
       return buildProjectConfigImportCalloutPolicy(activeProject, {
         status: "one",
diff --git a/packages/app/src/project-config-import/availability.ts b/packages/app/src/project-config-import/availability.ts
new file mode 100644
index 000000000..13f59a520
--- /dev/null
+++ b/packages/app/src/project-config-import/availability.ts
@@ -0,0 +1,14 @@
+export type ProjectConfigImportAvailabilityStatus = "loading" | "none" | "one" | "many";
+
+export function projectConfigImportAvailabilityStatus(input: {
+  availableCount: number;
+  isLoading: boolean;
+}): ProjectConfigImportAvailabilityStatus {
+  if (input.isLoading) {
+    return "loading";
+  }
+  if (input.availableCount === 0) {
+    return "none";
+  }
+  return input.availableCount === 1 ? "one" : "many";
+}
diff --git a/packages/app/src/project-config-import/project-config-import-model.test.ts b/packages/app/src/project-config-import/project-config-import-model.test.ts
index a24e0a62d..df65c91a3 100644
--- a/packages/app/src/project-config-import/project-config-import-model.test.ts
+++ b/packages/app/src/project-config-import/project-config-import-model.test.ts
@@ -18,6 +18,7 @@ import {
   stripProjectConfigImportSearchParams,
 } from "./route";
 import { projectConfigImportApplyFailureRetryAction } from "./retry";
+import { projectConfigImportAvailabilityStatus } from "./availability";
 import {
   createProjectConfigImportSourceRegistry,
   type ProjectConfigImportSourceDescriptor,
@@ -290,3 +291,14 @@ describe("project config import preview cache keys", () => {
     expect(calls).toEqual([protocolSource, protocolSource]);
   });
 });
+
+describe("project config import availability", () => {
+  it("waits for advertised source previews before reporting no imports", () => {
+    expect(projectConfigImportAvailabilityStatus({ availableCount: 0, isLoading: true })).toBe(
+      "loading",
+    );
+    expect(projectConfigImportAvailabilityStatus({ availableCount: 0, isLoading: false })).toBe(
+      "none",
+    );
+  });
+});
diff --git a/packages/app/src/project-config-import/use-project-config-import-model.ts b/packages/app/src/project-config-import/use-project-config-import-model.ts
index cb8688c6d..53d718c23 100644
--- a/packages/app/src/project-config-import/use-project-config-import-model.ts
+++ b/packages/app/src/project-config-import/use-project-config-import-model.ts
@@ -33,6 +33,7 @@ import {
   projectConfigImportApplyFailureRetryAction,
   type ProjectConfigImportRetryAction,
 } from "./retry";
+import { projectConfigImportAvailabilityStatus } from "./availability";
 
 const EMPTY_IMPORT_SOURCES: readonly ProjectConfigImportAdvertisedSource[] = [];
 type ProjectConfigImportPreviewSuccess = Extract<ProjectConfigImportPreviewResult, { ok: true }>;
@@ -309,9 +310,13 @@ export function useProjectConfigImportAvailability(input: {
   const availableSourceKeys = new Set(
     availableSources.map((source) => stableProjectConfigImportSourceKey(source.source)),
   );
+  const isLoading = previews.some((preview) => preview.isLoading || preview.isPending);
 
   return {
-    status: projectConfigImportAvailabilityStatus(availableSources.length),
+    status: projectConfigImportAvailabilityStatus({
+      availableCount: availableSources.length,
+      isLoading,
+    }),
     source: availableSources.length === 1 ? availableSources[0] : null,
     sources: availableSources,
     availableKinds,
@@ -319,13 +324,6 @@ export function useProjectConfigImportAvailability(input: {
   };
 }
 
-function projectConfigImportAvailabilityStatus(count: number): "none" | "one" | "many" {
-  if (count === 0) {
-    return "none";
-  }
-  return count === 1 ? "one" : "many";
-}
-
 function isRouteIntentCapabilityMissing(input: {
   intent: ProjectConfigImportIntent | null;
   routeIntent: ProjectConfigImportIntent | null;