Update workspace model ownership flows

packages/protocol/src/messages.workspaces.test.ts

@@ -4,6 +4,7 @@ import {
   RecentProviderSessionDescriptorPayloadSchema,
   SessionInboundMessageSchema,
   SessionOutboundMessageSchema,
+  WorkspaceCreateRequestSchema,
   WorkspaceDescriptorPayloadSchema,
   WorkspaceScriptPayloadSchema,
 } from "./messages.js";
@@ -866,4 +867,42 @@ describe("workspace message schemas", () => {
     const checkout = result.data.payload.entries[0]?.project.checkout;
     expect(checkout?.worktreeRoot).toBe("C:\\repo");
   });
+
+  test("workspace.create.request rejects old flat backing shape and accepts new source envelope", () => {
+    // Old flat shape with backing enum must be rejected.
+    const oldFlat = WorkspaceCreateRequestSchema.safeParse({
+      type: "workspace.create.request",
+      requestId: "req-old",
+      backing: "worktree",
+      cwd: "/tmp/repo",
+      branch: "feat/my-feature",
+    });
+    expect(oldFlat.success).toBe(false);
+
+    // New envelope shape with source discriminated union must be accepted.
+    const newWorktree = WorkspaceCreateRequestSchema.parse({
+      type: "workspace.create.request",
+      requestId: "req-worktree",
+      source: {
+        kind: "worktree",
+        cwd: "/tmp/repo",
+        action: "checkout",
+        refName: "feat/my-feature",
+      },
+    });
+    expect(newWorktree.type).toBe("workspace.create.request");
+    expect(newWorktree.source.kind).toBe("worktree");
+
+    // Directory source must also be accepted.
+    const newDirectory = WorkspaceCreateRequestSchema.parse({
+      type: "workspace.create.request",
+      requestId: "req-dir",
+      source: {
+        kind: "directory",
+        path: "/tmp/repo",
+      },
+    });
+    expect(newDirectory.type).toBe("workspace.create.request");
+    expect(newDirectory.source.kind).toBe("directory");
+  });
 });