test(wrapper): cover preset header and empty metadata

src/wrapper/cli.test.ts

@@ -192,6 +192,74 @@ test("wrapper passes --append-system-prompt when the prompt file exists", async
   assert.equal(argv[idx + 1], promptPath);
 });
 
+test("wrapper omits tools and system prompt flags when metadata is absent or empty", async () => {
+  const dir = await mkdtemp(join(tmpdir(), "pi-subagents-wrapper-"));
+  const metaPath = join(dir, "meta.json");
+  const resultPath = join(dir, "result.json");
+  const capturePath = join(dir, "capture.json");
+  const piPath = join(dir, "pi");
+
+  await writeFile(
+    piPath,
+    [
+      `#!${process.execPath}`,
+      "const fs = require('fs');",
+      `const capturePath = ${JSON.stringify(capturePath)};`,
+      "const obj = {",
+      "  PI_SUBAGENTS_GITHUB_COPILOT_INITIATOR: process.env.PI_SUBAGENTS_GITHUB_COPILOT_INITIATOR || '',",
+      "  PI_SUBAGENTS_CHILD: process.env.PI_SUBAGENTS_CHILD || '',",
+      "  argv: process.argv.slice(2)",
+      "};",
+      "fs.writeFileSync(capturePath, JSON.stringify(obj), 'utf8');",
+      "console.log(JSON.stringify({type:'message_end',message:{role:'assistant',content:[{type:'text',text:'done'}],model:'github-copilot/gpt-4o',stopReason:'stop'}}));",
+    ].join("\n"),
+    "utf8",
+  );
+  await chmod(piPath, 0o755);
+
+  await writeFile(
+    metaPath,
+    JSON.stringify(
+      {
+        runId: "run-1",
+        mode: "single",
+        task: "inspect auth",
+        cwd: dir,
+        requestedModel: "anthropic/claude-sonnet-4-5",
+        resolvedModel: "anthropic/claude-sonnet-4-5",
+        startedAt: "2026-04-09T00:00:00.000Z",
+        sessionPath: join(dir, "child-session.jsonl"),
+        eventsPath: join(dir, "events.jsonl"),
+        resultPath,
+        stdoutPath: join(dir, "stdout.log"),
+        stderrPath: join(dir, "stderr.log"),
+        transcriptPath: join(dir, "transcript.log"),
+        tools: [],
+      },
+      null,
+      2,
+    ),
+    "utf8",
+  );
+
+  const wrapperPath = join(dirname(fileURLToPath(import.meta.url)), "cli.mjs");
+  const child = spawn(process.execPath, [wrapperPath, metaPath], {
+    env: {
+      ...process.env,
+      PATH: dir,
+    },
+    stdio: ["ignore", "pipe", "pipe"],
+  });
+
+  const exitCode = await waitForExit(child);
+  assert.equal(exitCode, 0);
+
+  const captureJson = JSON.parse(await readFile(capturePath, "utf8"));
+  const argv = captureJson.argv;
+  assert.equal(argv.includes("--tools"), false);
+  assert.equal(argv.includes("--append-system-prompt"), false);
+});
+
 test("wrapper marks github-copilot child runs as agent-initiated", async () => {
   const captured = await runWrapperWithFakePi("github-copilot/gpt-4o");
   assert.equal(captured.flags.PI_SUBAGENTS_GITHUB_COPILOT_INITIATOR, "agent");

src/wrapper/render.test.ts

@@ -17,6 +17,20 @@ test("renderHeader prints generic subagent metadata", () => {
   assert.match(header, /Session: \/repo\/\.pi\/subagents\/runs\/run-1\/child-session\.jsonl/);
 });
 
+test("renderHeader includes preset when present", () => {
+  const header = renderHeader({
+    preset: "auth-inspector",
+    task: "Inspect authentication code",
+    cwd: "/repo",
+    requestedModel: "anthropic/claude-sonnet-4-5",
+    resolvedModel: "anthropic/claude-sonnet-4-5",
+    sessionPath: "/repo/.pi/subagents/runs/run-1/child-session.jsonl",
+  });
+
+  assert.match(header, /Preset: auth-inspector/);
+  assert.doesNotMatch(header, /Agent:/);
+});
+
 test("renderEventLine keeps bash commands readable for subagent transcript output", () => {
   const line = renderEventLine({
     type: "tool_call",