Fix Antigravity model list and enhance clipboard-guided handoff UX

public/app.js

@@ -1851,14 +1851,13 @@ const DEV_TARGETS = {
   antigravity: {
     id: "antigravity",
     label: "🛸 Google Antigravity",
-    defaultModel: "gemini-3.1-pro",
+    defaultModel: "gemini-3.8-flash",
     models: [
-      { id: "gemini-3.1-pro", label: "Gemini 3.1 Pro (Recommended — Full-Stack & Architecture)" },
+      { id: "gemini-4-argon", label: "Gemini 4 Argon (Medium)" },
-      { id: "gemini-3.0-pro", label: "Gemini 3.0 Pro (Deep Reasoning & Complex Refactors)" },
+      { id: "gemini-3.8-flash", label: "Gemini 3.8 Flash (Medium)" },
-      { id: "gemini-3.1-flash", label: "Gemini 3.1 Flash (Fast Iteration & UI Prototyping)" },
+      { id: "claude-opus-5.5", label: "Claude Opus 5.5 (Medium)" },
-      { id: "gemini-3.1-flash-lite", label: "Gemini 3.1 Flash-Lite (Lightweight & Rapid Tasks)" },
+      { id: "claude-sonnet-5.5", label: "Claude Sonnet 5.5 (Medium)" },
-      { id: "claude-sonnet-4.5", label: "Claude 4.5 Sonnet (via Antigravity Model Selector)" },
+      { id: "gpt-oss-120b", label: "GPT-OSS 120B (Medium)" }
-      { id: "claude-opus-4.5", label: "Claude 4.5 Opus (via Antigravity Model Selector)" }
     ]
   },
   codex: {
@@ -1875,6 +1874,33 @@ const DEV_TARGETS = {
   }
 };
 
+async function copyTextToClipboard(text) {
+  if (!text) return false;
+  if (navigator.clipboard && window.isSecureContext) {
+    try {
+      await navigator.clipboard.writeText(text);
+      return true;
+    } catch {
+      // Fall through to fallback
+    }
+  }
+  try {
+    const textArea = document.createElement("textarea");
+    textArea.value = text;
+    textArea.style.position = "fixed";
+    textArea.style.left = "-999999px";
+    textArea.style.top = "-999999px";
+    document.body.appendChild(textArea);
+    textArea.focus();
+    textArea.select();
+    const successful = document.execCommand("copy");
+    textArea.remove();
+    return successful;
+  } catch {
+    return false;
+  }
+}
+
 let activeDevTarget = "antigravity";
 
 function populateDevModelOptions(targetApp) {
@@ -1940,6 +1966,14 @@ async function openDevHandoffModal(defaultTarget = "antigravity") {
     homelabCb.checked = state.activeIdea.category === "project" || !isCurrentProductTShirt();
   }
 
+  const instructionNote = document.getElementById("dev-handoff-instruction-note");
+  if (instructionNote) {
+    instructionNote.innerHTML =
+      activeDevTarget === "codex"
+        ? "🤖 Submitting opens OpenAI Codex with the prompt preloaded and saves the full spec to your workspace."
+        : "🛸 Submitting switches focus to Antigravity and copies the complete project specification to your clipboard. Simply press <kbd>Ctrl+V</kbd> in Antigravity's chat to start coding.";
+  }
+
   document.getElementById("dev-handoff-result-box")?.classList.add("hidden");
   modal.classList.remove("hidden");
   await refreshDevSpecPreview();
@@ -2806,6 +2840,13 @@ function bindGlobalEvents() {
             ? "🚀 Submit & Open in OpenAI Codex"
             : "🚀 Submit & Launch in Antigravity";
       }
+      const instructionNote = document.getElementById("dev-handoff-instruction-note");
+      if (instructionNote) {
+        instructionNote.innerHTML =
+          activeDevTarget === "codex"
+            ? "🤖 Submitting opens OpenAI Codex with the prompt preloaded and saves the full spec to your workspace."
+            : "🛸 Submitting switches focus to Antigravity and copies the complete project specification to your clipboard. Simply press <kbd>Ctrl+V</kbd> in Antigravity's chat to start coding.";
+      }
       await refreshDevSpecPreview();
     });
   });
@@ -2816,8 +2857,8 @@ function bindGlobalEvents() {
   document.getElementById("btn-copy-dev-spec")?.addEventListener("click", async () => {
     const text = document.getElementById("dev-spec-preview-textarea")?.value || "";
     if (!text) return;
-    await navigator.clipboard.writeText(text);
+    const ok = await copyTextToClipboard(text);
-    showToast("📋 Copied full development specification to clipboard!");
+    showToast(ok ? "📋 Copied full development specification to clipboard!" : "⚠️ Unable to auto-copy; please copy text manually.");
   });
 
   document.getElementById("btn-download-dev-spec")?.addEventListener("click", () => {
@@ -2852,11 +2893,7 @@ function bindGlobalEvents() {
 
     try {
       // 1. Copy full specification to clipboard so it's immediately ready to paste (Ctrl+V) in Antigravity or Codex
-      try {
+      await copyTextToClipboard(customPrompt);
-        await navigator.clipboard.writeText(customPrompt);
-      } catch {
-        // Ignore clipboard permission errors if non-HTTPS context
-      }
 
       // 2. Persist handoff package & workspace on server
       const res = await apiFetch(`/api/ideas/${state.activeIdeaId}/dev-handoff`, {
@@ -2876,30 +2913,69 @@ function bindGlobalEvents() {
 
       if (resultBox) {
         resultBox.classList.remove("hidden");
-        resultBox.innerHTML = `
+        const modelName = handoff.modelLabel || handoff.model;
-          <div style="display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:0.5rem;">
+
-            <strong>✅ Ready in ${escapeHtml(handoff.targetLabel)} (${escapeHtml(handoff.model)})</strong>
+        if (activeDevTarget === "antigravity") {
-            <div style="display:flex;gap:0.4rem;">
+          resultBox.innerHTML = `
-              <a href="${escapeHtml(handoff.deepLinkUrl)}" class="btn btn-primary btn-xs">
+            <div style="background:linear-gradient(135deg, rgba(76,140,245,0.12), rgba(52,199,89,0.12)); border:1px solid rgba(76,140,245,0.35); border-radius:8px; padding:0.85rem; margin-top:0.4rem;">
-                🚀 Open ${activeDevTarget === "codex" ? "Codex App" : "Antigravity App"}
+              <div style="display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:0.5rem;">
-              </a>
+                <div style="font-weight:700;font-size:0.95rem;display:flex;align-items:center;gap:0.4rem;">
-              <a href="${escapeHtml(handoff.specUrl)}" target="_blank" rel="noopener noreferrer" class="btn btn-ghost btn-xs">
+                  <span>🛸</span> Switched to Google Antigravity!
-                📄 View SPEC.md
+                </div>
-              </a>
+                <div style="display:flex;gap:0.4rem;flex-wrap:wrap;">
+                  <button type="button" id="btn-copy-dev-spec-again" class="btn btn-secondary btn-xs">
+                    📋 Copy Spec Again
+                  </button>
+                  <a href="${escapeHtml(handoff.deepLinkUrl)}" class="btn btn-primary btn-xs">
+                    🛸 Re-Focus Antigravity
+                  </a>
+                  <a href="${escapeHtml(handoff.specUrl)}" target="_blank" rel="noopener noreferrer" class="btn btn-ghost btn-xs">
+                    📄 View SPEC.md
+                  </a>
+                </div>
+              </div>
+
+              <div style="margin-top:0.6rem;padding:0.65rem 0.8rem;background:var(--bg-card);border-radius:6px;border:1px dashed var(--border-color);font-size:0.85rem;line-height:1.5;">
+                <div style="color:var(--text-main);font-weight:600;">
+                  👉 Ready to develop with <strong>${escapeHtml(modelName)}</strong>!
+                </div>
+                <div style="margin-top:0.25rem;color:var(--text-secondary);">
+                  The full specification for <strong>${escapeHtml(state.activeIdea.title)}</strong> has been loaded onto your clipboard! Since Antigravity requires starting or selecting your conversation, simply click into Antigravity's chat bar and press <kbd style="background:var(--bg-base);padding:2px 6px;border-radius:4px;border:1px solid var(--border-color);font-weight:700;">Ctrl+V</kbd> (or <kbd style="background:var(--bg-base);padding:2px 6px;border-radius:4px;border:1px solid var(--border-color);font-weight:700;">Cmd+V</kbd>) to paste the prompt and begin.
+                </div>
+              </div>
             </div>
-          </div>
+          `;
-          <p class="muted-label" style="margin-top:0.25rem;">
+
-            Full specification has been <strong>copied to your clipboard (<kbd>Ctrl+V</kbd>)</strong> and saved to server workspace <code>${escapeHtml(handoff.slug)}</code>.
+          document.getElementById("btn-copy-dev-spec-again")?.addEventListener("click", async () => {
-          </p>
+            const reCopied = await copyTextToClipboard(customPrompt);
-          ${
+            showToast(reCopied ? "📋 Specification copied to clipboard! Press Ctrl+V in Antigravity." : "⚠️ Please copy manually from the preview below.");
-            handoff.codexExecution?.output
+          });
-              ? `<pre style="max-height:160px;overflow:auto;background:var(--bg-base);padding:0.5rem;border-radius:6px;font-size:0.75rem;white-space:pre-wrap;margin-top:0.35rem;">${escapeHtml(handoff.codexExecution.output)}</pre>`
+        } else {
-              : ""
+          resultBox.innerHTML = `
-          }
+            <div style="display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:0.5rem;">
-        `;
+              <strong>✅ Ready in ${escapeHtml(handoff.targetLabel)} (${escapeHtml(handoff.model)})</strong>
+              <div style="display:flex;gap:0.4rem;">
+                <a href="${escapeHtml(handoff.deepLinkUrl)}" class="btn btn-primary btn-xs">
+                  🚀 Open Codex App
+                </a>
+                <a href="${escapeHtml(handoff.specUrl)}" target="_blank" rel="noopener noreferrer" class="btn btn-ghost btn-xs">
+                  📄 View SPEC.md
+                </a>
+              </div>
+            </div>
+            <p class="muted-label" style="margin-top:0.25rem;">
+              Full specification has been <strong>copied to your clipboard (<kbd>Ctrl+V</kbd>)</strong> and saved to server workspace <code>${escapeHtml(handoff.slug)}</code>.
+            </p>
+            ${
+              handoff.codexExecution?.output
+                ? `<pre style="max-height:160px;overflow:auto;background:var(--bg-base);padding:0.5rem;border-radius:6px;font-size:0.75rem;white-space:pre-wrap;margin-top:0.35rem;">${escapeHtml(handoff.codexExecution.output)}</pre>`
+                : ""
+            }
+          `;
+        }
       }
 
-      showToast(`🚀 Copied full spec & launching ${handoff.targetLabel} (${handoff.model})!`);
+      showToast(`🛸 Copied spec & launching Antigravity! Paste with Ctrl+V.`);
       await loadIdeas();
       renderDrawerContent();
 

public/index.html

@@ -936,6 +936,10 @@
 
         <div id="dev-handoff-result-box" class="nb-edit-box hidden"></div>
 
+        <div id="dev-handoff-instruction-note" class="muted-label" style="font-size:0.8rem; padding:0.4rem 0.6rem; background:rgba(76,140,245,0.08); border-radius:6px; border-left:3px solid var(--accent-primary); margin-top:0.4rem;">
+          🛸 Submitting switches focus to Antigravity and copies the complete project specification to your clipboard. Simply press <kbd>Ctrl+V</kbd> in Antigravity's chat to start coding.
+        </div>
+
         <div class="modal-footer">
           <button type="button" id="btn-cancel-dev-modal" class="btn btn-ghost">Cancel</button>
           <button type="submit" id="btn-submit-dev-handoff" class="btn btn-primary">

server/idea_generator.js

@@ -424,14 +424,13 @@ export const DEV_HANDOFF_TARGETS = {
     id: "antigravity",
     label: "🛸 Google Antigravity",
     protocol: "antigravity://",
-    defaultModel: "gemini-3.1-pro",
+    defaultModel: "gemini-3.8-flash",
     models: [
-      { id: "gemini-3.1-pro", label: "Gemini 3.1 Pro (Recommended — Full-Stack & Architecture)" },
+      { id: "gemini-4-argon", label: "Gemini 4 Argon (Medium)" },
-      { id: "gemini-3.0-pro", label: "Gemini 3.0 Pro (Deep Reasoning & Complex Refactors)" },
+      { id: "gemini-3.8-flash", label: "Gemini 3.8 Flash (Medium)" },
-      { id: "gemini-3.1-flash", label: "Gemini 3.1 Flash (Fast Iteration & UI Prototyping)" },
+      { id: "claude-opus-5.5", label: "Claude Opus 5.5 (Medium)" },
-      { id: "gemini-3.1-flash-lite", label: "Gemini 3.1 Flash-Lite (Lightweight & Rapid Tasks)" },
+      { id: "claude-sonnet-5.5", label: "Claude Sonnet 5.5 (Medium)" },
-      { id: "claude-sonnet-4.5", label: "Claude 4.5 Sonnet (via Antigravity Model Selector)" },
+      { id: "gpt-oss-120b", label: "GPT-OSS 120B (Medium)" }
-      { id: "claude-opus-4.5", label: "Claude 4.5 Opus (via Antigravity Model Selector)" }
     ]
   },
   codex: {
@@ -688,10 +687,14 @@ export async function executeDevelopmentHandoff({
     }
   }
 
+  const modelObj = targetMeta.models.find((m) => m.id === chosenModel);
+  const modelLabel = modelObj ? modelObj.label : chosenModel;
+
   return {
     targetApp,
     targetLabel: targetMeta.label,
     model: chosenModel,
+    modelLabel,
     slug,
     specMarkdown: compiledSpec,
     specUrl,

test/api.test.js

@@ -269,6 +269,24 @@ test("Development Handoff endpoint compiles full Spark spec and submits to Antig
   assert.equal(handoffData.handoff.model, "gpt-5.6-sol");
   assert.match(handoffData.handoff.deepLinkUrl, /^codex:\/\/threads\/new/);
   assert.equal(handoffData.idea.status, "building");
+
+  // Verify Antigravity handoff with updated models (Gemini 3.8 Flash default)
+  const agyRes = await fetch(`${baseUrl}/api/ideas/1/dev-handoff`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({
+      targetApp: "antigravity",
+      model: "gemini-3.8-flash",
+      includeHomelab: true,
+      moveStatusToBuilding: true
+    })
+  });
+  assert.equal(agyRes.status, 200);
+  const agyData = await agyRes.json();
+  assert.equal(agyData.handoff.targetApp, "antigravity");
+  assert.equal(agyData.handoff.model, "gemini-3.8-flash");
+  assert.equal(agyData.handoff.modelLabel, "Gemini 3.8 Flash (Medium)");
+  assert.match(agyData.handoff.deepLinkUrl, /^antigravity:\/\/new\?model=gemini-3\.8-flash/);
 });