diff --git a/server/src/__tests__/teams-catalog-install-no-overrides.test.ts b/server/src/__tests__/teams-catalog-install-no-overrides.test.ts
new file mode 100644
index 00000000000..152e468bd9a
--- /dev/null
+++ b/server/src/__tests__/teams-catalog-install-no-overrides.test.ts
@@ -0,0 +1,138 @@
+import { randomUUID } from "node:crypto";
+import { promises as fs } from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { eq } from "drizzle-orm";
+import { agents, companies, createDb } from "@paperclipai/db";
+import {
+  getEmbeddedPostgresTestSupport,
+  startEmbeddedPostgresTestDatabase,
+} from "./helpers/embedded-postgres.js";
+import { teamsCatalogService } from "../services/teams-catalog.js";
+
+const embeddedPostgresSupport = await getEmbeddedPostgresTestSupport();
+const describeEmbeddedPostgres = embeddedPostgresSupport.supported ? describe.sequential : describe.skip;
+
+if (!embeddedPostgresSupport.supported) {
+  console.warn(
+    `Skipping embedded Postgres teams catalog no-overrides install tests on this host: ${embeddedPostgresSupport.reason ?? "unsupported environment"}`,
+  );
+}
+
+describeEmbeddedPostgres("teams catalog install with no caller adapter overrides", () => {
+  let db!: ReturnType<typeof createDb>;
+  let tempDb: Awaited<ReturnType<typeof startEmbeddedPostgresTestDatabase>> | null = null;
+  let tempHome: string | null = null;
+  let oldPaperclipHome: string | undefined;
+
+  beforeAll(async () => {
+    oldPaperclipHome = process.env.PAPERCLIP_HOME;
+    tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "paperclip-teams-catalog-no-overrides-"));
+    process.env.PAPERCLIP_HOME = tempHome;
+    tempDb = await startEmbeddedPostgresTestDatabase("paperclip-teams-catalog-no-overrides-");
+    db = createDb(tempDb.connectionString);
+  }, 20_000);
+
+  afterAll(async () => {
+    if (oldPaperclipHome === undefined) delete process.env.PAPERCLIP_HOME;
+    else process.env.PAPERCLIP_HOME = oldPaperclipHome;
+    if (tempHome) await fs.rm(tempHome, { recursive: true, force: true });
+    await tempDb?.cleanup();
+  });
+
+  async function seedEmptyCompany() {
+    const companyId = randomUUID();
+    await db.insert(companies).values({
+      id: companyId,
+      name: "Clean install company",
+      issuePrefix: `T${companyId.replace(/-/g, "").slice(0, 6).toUpperCase()}`,
+      requireBoardApprovalForNewAgents: false,
+    });
+    return companyId;
+  }
+
+  async function listAdapterTypesByName(companyId: string) {
+    const rows = await db
+      .select({
+        name: agents.name,
+        role: agents.role,
+        adapterType: agents.adapterType,
+      })
+      .from(agents)
+      .where(eq(agents.companyId, companyId));
+    return new Map(rows.map((row) => [row.name, row]));
+  }
+
+  it("installs core-exec-team end-to-end with no caller overrides and creates 3 claude_local agents", async () => {
+    const companyId = await seedEmptyCompany();
+    const svc = teamsCatalogService(db);
+
+    await svc.installCatalogTeam(companyId, "core-exec-team", {
+      collisionStrategy: "rename",
+      include: { projects: false, issues: false },
+    });
+
+    const byName = await listAdapterTypesByName(companyId);
+    expect(byName.size).toBe(3);
+
+    const adapterTypes = Array.from(byName.values()).map((row) => row.adapterType);
+    expect(adapterTypes).toEqual(["claude_local", "claude_local", "claude_local"]);
+    expect(adapterTypes).not.toContain("process");
+    expect(adapterTypes).not.toContain("http");
+  });
+
+  it("installs product-design end-to-end with no caller overrides and uses claude_local", async () => {
+    const companyId = await seedEmptyCompany();
+    const svc = teamsCatalogService(db);
+
+    await svc.installCatalogTeam(companyId, "product-design", {
+      collisionStrategy: "rename",
+      include: { projects: false, issues: false },
+    });
+
+    const byName = await listAdapterTypesByName(companyId);
+    expect(byName.size).toBe(1);
+    const adapterTypes = Array.from(byName.values()).map((row) => row.adapterType);
+    expect(adapterTypes).toEqual(["claude_local"]);
+    expect(adapterTypes).not.toContain("process");
+  });
+
+  it("installs product-engineering end-to-end with no caller overrides and uses claude_local for every agent", async () => {
+    const companyId = await seedEmptyCompany();
+    const svc = teamsCatalogService(db);
+
+    await svc.installCatalogTeam(companyId, "product-engineering", {
+      collisionStrategy: "rename",
+      include: { projects: false, issues: false },
+    });
+
+    const byName = await listAdapterTypesByName(companyId);
+    expect(byName.size).toBe(3);
+    const adapterTypes = Array.from(byName.values()).map((row) => row.adapterType);
+    expect(adapterTypes).toEqual(["claude_local", "claude_local", "claude_local"]);
+    expect(adapterTypes).not.toContain("process");
+  });
+
+  it("honors an explicit caller adapter override for a single slug while defaulting the rest to claude_local", async () => {
+    const companyId = await seedEmptyCompany();
+    const svc = teamsCatalogService(db);
+
+    await svc.installCatalogTeam(companyId, "core-exec-team", {
+      collisionStrategy: "rename",
+      include: { projects: false, issues: false },
+      adapterOverrides: {
+        cto: { adapterType: "opencode_local", adapterConfig: { model: "anthropic/claude-opus-4" } },
+      },
+    });
+
+    const byName = await listAdapterTypesByName(companyId);
+    expect(byName.size).toBe(3);
+    const ctoRow = Array.from(byName.values()).find((row) => row.role === "engineering-manager" || row.name === "CTO");
+    expect(ctoRow?.adapterType).toBe("opencode_local");
+    const otherAdapters = Array.from(byName.values())
+      .filter((row) => row !== ctoRow)
+      .map((row) => row.adapterType);
+    expect(otherAdapters).toEqual(["claude_local", "claude_local"]);
+  });
+});