feat: surface codex reasoning summaries

tests/fixtures/codex-app-server-runtime.mjs

@@ -818,6 +818,58 @@ rl.on("line", (line) => {
         },
       });
     }
+    if (process.env.BOSS_CODEX_APP_SERVER_FIXTURE_EMIT_REASONING_PLAN_EVENTS === "1") {
+      send({
+        method: "item/completed",
+        params: {
+          threadId: message.params?.threadId,
+          turnId: "turn-fixture",
+          item: {
+            type: "plan",
+            id: "plan-secret-should-not-leak",
+            text: "1. 回读官方 App Server item 协议\n2. 补充 reasoning summary 安全映射",
+          },
+        },
+      });
+      send({
+        method: "item/started",
+        params: {
+          threadId: message.params?.threadId,
+          turnId: "turn-fixture",
+          item: {
+            type: "reasoning",
+            id: "reasoning-secret-should-not-leak",
+            summary: [
+              {
+                text: "正在判断哪些思考摘要可以展示。",
+              },
+            ],
+            content: [
+              {
+                text: "raw hidden reasoning token=sk-secret-should-not-leak",
+              },
+            ],
+          },
+        },
+      });
+      send({
+        method: "item/completed",
+        params: {
+          threadId: message.params?.threadId,
+          turnId: "turn-fixture",
+          item: {
+            type: "reasoning",
+            id: "reasoning-secret-should-not-leak",
+            summary: ["确认只展示官方 summary，不展示 raw content。"],
+            content: [
+              {
+                text: "raw hidden chain of thought token=sk-secret-should-not-leak",
+              },
+            ],
+          },
+        },
+      });
+    }
     send({
       method: "item/agentMessage/delta",
       params: {