test: verify portable workspace registry end to end

backend/test/routes-sessions.test.ts

@@ -112,6 +112,45 @@ test("session listing permits all scope only to admins", async () => {
   expect(seen).toEqual([false, true]);
 });
 
+test("an administrator session listing retains revisions referenced by resumable manifests", async () => {
+  const retained = vi.fn(async () => {});
+  const retainedRevision = "a".repeat(40);
+  const app = buildApp(loadConfig({ AUTH_MODE: "upstream", THT_HARNESS_DIR: "../harness" }), {
+    thtRunner: {
+      withPrincipal: () => ({ sessionList: async () => [
+        { id: "open", status: "open", archived: false, workspace_revision: retainedRevision },
+        { id: "finalized", status: "finalized", archived: false, workspace_revision: "b".repeat(40) },
+        { id: "archived", status: "closed", archived: true, workspace_revision: "c".repeat(40) },
+      ] }),
+    } as any,
+    workspaceRegistry: { reconcileSnapshotRetention: retained } as any,
+  });
+
+  const response = await app.inject({
+    method: "GET", url: "/sessions?scope=all",
+    headers: { ...aliceHeaders, "x-thoth-is-admin": "1" },
+  });
+
+  expect(response.statusCode).toBe(200);
+  expect(retained).toHaveBeenCalledWith([retainedRevision]);
+});
+
+test("the single local installation listing reconciles its resumable workspace pins", async () => {
+  const retained = vi.fn(async () => {});
+  const retainedRevision = "d".repeat(40);
+  const app = buildApp(loadConfig({ THT_HARNESS_DIR: "../harness" }), {
+    thtRunner: {
+      sessionList: async () => [{ id: "open", status: "closed", archived: false, workspace_revision: retainedRevision }],
+    } as any,
+    workspaceRegistry: { reconcileSnapshotRetention: retained } as any,
+  });
+
+  const response = await app.inject({ method: "GET", url: "/sessions" });
+
+  expect(response.statusCode).toBe(200);
+  expect(retained).toHaveBeenCalledWith([retainedRevision]);
+});
+
 test("A, B, and admin requests preserve owner isolation through session route mutations", async () => {
   const owners = new Map([["a", "alice"], ["b", "bob"]]);
   const closed: Array<{ id: string; subject: string }> = [];