Add a prompt for skills installation location.

src/firebase_studio/migrate.spec.ts

@@ -23,12 +23,12 @@
 
   describe("extractMetadata", () => {
     beforeEach(() => {
       sandbox.stub(fs, "readFile").callsFake(async (p: any) => {
         const pStr = p.toString();
         if (pStr.endsWith("metadata.json")) {
           return JSON.stringify({ projectId: "original-project" });
         }
         if (pStr.endsWith("blueprint.md")) {
           return "# **App Name**: Test App";
         }
         return "";
@@ -54,13 +54,14 @@
 
     let listBackendsStub: sinon.SinonStub;
     let commandStub: sinon.SinonStub;
+    let selectStub: sinon.SinonStub;
     let trackStub: sinon.SinonStub;
     let confirmStub: sinon.SinonStub;
     let unlinkStub: sinon.SinonStub;
     let spawnStub: sinon.SinonStub;
 
     beforeEach(() => {
       sandbox.stub(fs, "stat").resolves({ isDirectory: () => true } as any);
       const cp = require("child_process");
       sandbox.stub(cp, "spawnSync").returns({ status: 0 });
       sandbox.stub(process, "platform").value("darwin");
@@ -115,6 +116,7 @@
       commandStub = sandbox.stub(utils, "commandExistsSync").returns(false);
       trackStub = sandbox.stub(track, "trackGA4").resolves();
       confirmStub = sandbox.stub(prompt, "confirm").resolves(true);
+      selectStub = sandbox.stub(prompt, "select").resolves("local");
 
       const childProcess = require("child_process");
       spawnStub = sandbox.stub(childProcess, "spawn").returns({
@@ -474,6 +476,32 @@
       expect(launchJsonCall).to.be.undefined;
     });
 
+    it("should install skills globally if the user chooses global", async () => {
+      selectStub.resolves("global");
+
+      await migrate(testRoot);
+
+      const cp = require("child_process");
+      expect(
+        (cp.spawnSync as sinon.SinonStub).calledWith(
+          "npx",
+          [
+            "-y",
+            "skills",
+            "add",
+            "firebase/agent-skills",
+            "-a",
+            "gemini-cli",
+            "--skill",
+            "*",
+            "-y",
+            "-g",
+          ],
+          sinon.match.any,
+        ),
+      ).to.be.true;
+    });
+
     it("should detect antigravity command if agy is missing", async () => {
       commandStub.withArgs("agy").returns(false);
       commandStub.withArgs("antigravity").returns(true);

src/firebase_studio/migrate.ts

@@ -294,19 +294,38 @@ async function injectAntigravityContext(
   await fs.mkdir(skillsDir, { recursive: true });
 
   // Add Skills using npx
+  const installLocation = await prompt.select({
+    message: "Where would you like to install Firebase project skills?",
+    choices: [
+      { name: "Locally in the project", value: "local" },
+      { name: "Globally for all projects", value: "global" },
+    ],
+    default: "local",
+    nonInteractive: process.env.NODE_ENV === "test",
+  });
+
   logger.info("⏳ Adding Antigravity skills...");
   try {
-    const result = spawnSync(
-      "npx",
-      // gemini-CLI is chosen as a workaround for the .agents subfolder (instead of .agent)
-      // which is current for antigravity's location from vercel.
-      ["-y", "skills", "add", "firebase/agent-skills", "-a", "gemini-cli", "--skill", "*", "-y"],
-      {
-        cwd: rootPath,
-        stdio: "ignore",
-        shell: process.platform === "win32",
-      },
-    );
+    const args = [
+      "-y",
+      "skills",
+      "add",
+      "firebase/agent-skills",
+      "-a",
+      "gemini-cli",
+      "--skill",
+      "*",
+      "-y",
+    ];
+    if (installLocation === "global") {
+      args.push("-g");
+    }
+
+    const result = spawnSync("npx", args, {
+      cwd: rootPath,
+      stdio: "ignore",
+      shell: process.platform === "win32",
+    });
     if (result.error) {
       throw result.error;
     }