fix(workspaces): inspect storage only when needed (#18410)

packages/shared/src/validators/plugin.test.ts

@@ -33,6 +33,17 @@ describe("plugin capability constants", () => {
 });
 
 describe("plugin manifest validators", () => {
+  it("preserves explicit workspace ancestry support without changing legacy declarations", () => {
+    const manifest = { id: "example.storage", apiVersion: 1, version: "1.0.0", displayName: "Storage", description: "Storage", author: "Tests",
+      categories: ["workspace"], capabilities: ["workspaces.manage", "events.subscribe"], resourceLifecycle: ["project"],
+      entrypoints: { worker: "worker.js" }, workspaceProvider: { modes: ["isolated_workspace"], strategies: ["git_worktree"] } };
+    expect(pluginManifestV1Schema.parse(manifest).workspaceProvider?.supportsMergeAncestry).toBeUndefined();
+    for (const supportsMergeAncestry of [true, false]) {
+      expect(pluginManifestV1Schema.parse({ ...manifest, workspaceProvider: { ...manifest.workspaceProvider, supportsMergeAncestry } })
+        .workspaceProvider?.supportsMergeAncestry).toBe(supportsMergeAncestry);
+    }
+    expect(pluginManifestV1Schema.safeParse({ ...manifest, workspaceProvider: { ...manifest.workspaceProvider, supportsMergeAncestry: "false" } }).success).toBe(false);
+  });
   it("limits environment skills to unique declarations owned by the plugin", () => {
     const manifest = { ...buildSandboxProviderManifest({ skillKeys: ["desktop"] }),
       capabilities: ["environment.drivers.register", "skills.managed"],