Add Submit to Antigravity or Codex for Development modal with model picker and deep links

test/api.test.js

@@ -246,5 +246,31 @@ test("Suggest Names endpoint returns 6 creative name and tagline suggestions for
   assert.ok(data.suggestions[0].tagline);
 });
 
+test("Development Handoff endpoint compiles full Spark spec and submits to Antigravity or Codex with model picker", async () => {
+  const specRes = await fetch(`${baseUrl}/api/ideas/1/spec.md?target=codex&model=gpt-5.6-sol`);
+  assert.equal(specRes.status, 200);
+  const specText = await specRes.text();
+  assert.match(specText, /Development Handoff Specification/);
+  assert.match(specText, /gpt-5\.6-sol/);
+
+  const handoffRes = await fetch(`${baseUrl}/api/ideas/1/dev-handoff`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({
+      targetApp: "codex",
+      model: "gpt-5.6-sol",
+      includeHomelab: true,
+      moveStatusToBuilding: true
+    })
+  });
+  assert.equal(handoffRes.status, 200);
+  const handoffData = await handoffRes.json();
+  assert.equal(handoffData.handoff.targetApp, "codex");
+  assert.equal(handoffData.handoff.model, "gpt-5.6-sol");
+  assert.match(handoffData.handoff.deepLinkUrl, /^codex:\/\/threads\/new/);
+  assert.equal(handoffData.idea.status, "building");
+});
+
+