From cc8fe41e2828a34d4d9706c0b8353c0e91987a25 Mon Sep 17 00:00:00 2001
From: Jared <77949461+ThePharmer@users.noreply.github.com>
Date: Sun, 4 Oct 2026 03:15:14 -0400
Subject: [PATCH] Send display: summarized so Claude thinking renders (#4355)

The Agent SDK request never set thinking.display, so on Opus 4.7 and
later the API default of "omitted" applied and every thinking block
arrived with empty text. Paseo drops empty blocks, so Claude agents
never produced reasoning timeline items.

Closes #4342
---
 .../src/server/agent/providers/claude/agent.test.ts  |  4 ++--
 .../src/server/agent/providers/claude/agent.ts       | 12 ++++++++++--
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/packages/server/src/server/agent/providers/claude/agent.test.ts b/packages/server/src/server/agent/providers/claude/agent.test.ts
index dbd10aea4d..d28ac910ac 100644
--- a/packages/server/src/server/agent/providers/claude/agent.test.ts
+++ b/packages/server/src/server/agent/providers/claude/agent.test.ts
@@ -1009,7 +1009,7 @@ describe("ClaudeAgentSession features", () => {
 
     expect(queryFactory.mock.calls[0]?.[0].options).toMatchObject({
       effort: "xhigh",
-      thinking: { type: "adaptive" },
+      thinking: { type: "adaptive", display: "summarized" },
       settings: { ultracode: true },
     });
 
@@ -1223,7 +1223,7 @@ describe("ClaudeAgentSession features", () => {
 
   test.each([
     ["supported model", "claude-opus-4-8", { type: "disabled" }, undefined],
-    ["unsupported model", "claude-fable-5", { type: "adaptive" }, "high"],
+    ["unsupported model", "claude-fable-5", { type: "adaptive", display: "summarized" }, "high"],
     ["custom model", "openrouter/anthropic/claude-opus-4-8", undefined, undefined],
     ["provider default", null, undefined, undefined],
   ])("reconciles Off when switching to a %s", async (_label, modelId, thinking, effort) => {
diff --git a/packages/server/src/server/agent/providers/claude/agent.ts b/packages/server/src/server/agent/providers/claude/agent.ts
index 15eeb1500a..36f991d019 100644
--- a/packages/server/src/server/agent/providers/claude/agent.ts
+++ b/packages/server/src/server/agent/providers/claude/agent.ts
@@ -3244,10 +3244,18 @@ class ClaudeAgentSession implements AgentSession {
       return { thinking: { type: "disabled" }, effort: undefined, ultracode: false };
     }
     if (thinkingOptionId === CLAUDE_ULTRACODE_THINKING_OPTION_ID) {
-      return { thinking: { type: "adaptive" }, effort: "xhigh", ultracode: true };
+      return {
+        thinking: { type: "adaptive", display: "summarized" },
+        effort: "xhigh",
+        ultracode: true,
+      };
     }
     if (thinkingOptionId && isClaudeThinkingEffort(thinkingOptionId)) {
-      return { thinking: { type: "adaptive" }, effort: thinkingOptionId, ultracode: false };
+      return {
+        thinking: { type: "adaptive", display: "summarized" },
+        effort: thinkingOptionId,
+        ultracode: false,
+      };
     }
     return { thinking: undefined, effort: undefined, ultracode: false };
   }