feat(providers): make bundled Hoplite opt-in from the catalog

Keep the contributor ACP adapter and provisioning progress while activating it only when a provider config entry exists. Removing the entry removes membership across restarts; existing provider defaults remain unchanged.

Present the Add provider catalog as a searchable grid and gate Hoplite activation on host support.

Co-authored-by: Odin Glynn-Martin <odin.glynn@icloud.com>

packages/protocol/src/messages.checkout-pr-schema.test.ts

@@ -812,3 +812,14 @@ describe("checkout PR schemas", () => {
     });
   });
 });
+
+test.each([undefined, false, true])(
+  "accepts optional Hoplite capability (%s)",
+  (hopliteProvider) => {
+    const features = hopliteProvider === undefined ? {} : { hopliteProvider };
+    expect(
+      ServerInfoStatusPayloadSchema.parse({ status: "server_info", serverId: "test", features })
+        .features,
+    ).toEqual(features);
+  },
+);

packages/protocol/src/messages.ts

@@ -3710,6 +3710,8 @@ export const ServerInfoStatusPayloadSchema = z
         commitBaseClassification: z.boolean().optional(),
         // COMPAT(providerRemoval): added in v0.1.105, drop the gate when floor >= v0.1.105.
         providerRemoval: z.boolean().optional(),
+        // COMPAT(hopliteProvider): added after v0.11.2, remove after 2027-04-15 once host floor includes the bundled adapter.
+        hopliteProvider: z.boolean().optional(),
         // COMPAT(importSessionWorkspaceTarget): added in v0.1.110, remove gate after 2027-01-16.
         importSessionWorkspaceTarget: z.boolean().optional(),
         // COMPAT(importSessionSearch): added in v0.8.0, remove gate after 2027-03-02.