fix(gateway): expose agent thinking defaults

Fixes #81760.

Exposes existing agent and model thinking defaults through agents.list, including protocol and Swift model support. Thanks @jbetala7.

packages/gateway-protocol/src/schema/agents-models-skills.test.ts

@@ -1,6 +1,7 @@
 import { Value } from "typebox/value";
 import { describe, expect, it } from "vitest";
 import {
+  AgentsListResultSchema,
   SkillsProposalInspectResultSchema,
   ToolsEffectiveResultSchema,
 } from "./agents-models-skills.js";
@@ -28,6 +29,31 @@ function toolsEffectiveResult() {
   };
 }
 
+describe("AgentsListResultSchema", () => {
+  it("accepts resolved per-agent thinking metadata", () => {
+    const result = {
+      defaultId: "main",
+      mainKey: "main",
+      scope: "per-sender",
+      agents: [
+        {
+          id: "investment-master",
+          name: "Investment Master",
+          model: { primary: "deepseek/deepseek-v4-flash" },
+          thinkingLevels: [
+            { id: "off", label: "off" },
+            { id: "xhigh", label: "xhigh" },
+          ],
+          thinkingOptions: ["off", "xhigh"],
+          thinkingDefault: "xhigh",
+        },
+      ],
+    };
+
+    expect(Value.Check(AgentsListResultSchema, result)).toBe(true);
+  });
+});
+
 describe("ToolsEffectiveResultSchema", () => {
   it("accepts runtime tool quarantine notices", () => {
     const result = {

packages/gateway-protocol/src/schema/agents-models-skills.ts

@@ -56,6 +56,19 @@ export const AgentSummarySchema = Type.Object(
         { additionalProperties: false },
       ),
     ),
+    thinkingLevels: Type.Optional(
+      Type.Array(
+        Type.Object(
+          {
+            id: NonEmptyString,
+            label: NonEmptyString,
+          },
+          { additionalProperties: false },
+        ),
+      ),
+    ),
+    thinkingOptions: Type.Optional(Type.Array(NonEmptyString)),
+    thinkingDefault: Type.Optional(NonEmptyString),
   },
   { additionalProperties: false },
 );