feat(subagents): add independent reviewer profile

extensions/interactive-subagents/test/test.ts

@@ -1144,6 +1144,28 @@ describe("status.ts", () => {
 describe("subagent discovery", () => {
   const testApi = (subagentsModule as any).__test__;
 
+  it("discovers the bundled reviewer with only Git-capable read tools", async () => {
+    await withIsolatedAgentEnv(async () => {
+      const reviewer = testApi.loadAgentDefaults("reviewer");
+      assert.ok(reviewer, "expected bundled reviewer to be discoverable");
+      assert.deepEqual(
+        reviewer.tools?.split(",").map((tool: string) => tool.trim()),
+        ["read", "grep", "find", "ls", "bash"],
+      );
+      assert.equal(reviewer.subagentAgents, undefined, "reviewer must not spawn nested agents");
+      assert.equal(reviewer.systemPromptMode, "append");
+      assert.equal(reviewer.autoExit, true);
+      assert.match(reviewer.body ?? "", /caller-supplied binary diff command/);
+      assert.match(reviewer.body ?? "", /SHA-256/);
+      assert.match(reviewer.body ?? "", /never remediates|remediation/);
+
+      const listed = testApi.discoverAgentDefinitions().find(
+        (agent: { name: string }) => agent.name === "reviewer",
+      );
+      assert.equal(listed?.source, "package");
+    });
+  });
+
   it("loads session-mode from frontmatter", async () => {
     await withIsolatedAgentEnv(async ({ projectAgentsDir }) => {
       writeAgentFile(