From 9b3decfad65eb852dc60aad24f8e854efaf04f4b Mon Sep 17 00:00:00 2001
From: Devin Foley <devin@devinfoley.com>
Date: Fri, 15 May 2026 17:20:20 -0700
Subject: [PATCH] Improve grok transcript readability

---
 .../grok-local/src/ui/parse-stdout.test.ts      |  4 ++--
 .../adapters/grok-local/src/ui/parse-stdout.ts  |  6 +++---
 ui/src/adapters/transcript.test.ts              | 17 +++++++++++++++++
 3 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/packages/adapters/grok-local/src/ui/parse-stdout.test.ts b/packages/adapters/grok-local/src/ui/parse-stdout.test.ts
index 9cdc2f4a1fb..715afc8896a 100644
--- a/packages/adapters/grok-local/src/ui/parse-stdout.test.ts
+++ b/packages/adapters/grok-local/src/ui/parse-stdout.test.ts
@@ -6,10 +6,10 @@ describe("parseGrokStdoutLine", () => {
 
   it("maps thought/text/end events into transcript entries", () => {
     expect(parseGrokStdoutLine(JSON.stringify({ type: "thought", data: "Plan first." }), ts)).toEqual([
-      { kind: "thinking", ts, text: "Plan first." },
+      { kind: "thinking", ts, text: "Plan first.", delta: true },
     ]);
     expect(parseGrokStdoutLine(JSON.stringify({ type: "text", data: "hello" }), ts)).toEqual([
-      { kind: "assistant", ts, text: "hello" },
+      { kind: "assistant", ts, text: "hello", delta: true },
     ]);
     expect(parseGrokStdoutLine(JSON.stringify({ type: "end", stopReason: "EndTurn", sessionId: "sess-1" }), ts)).toEqual([
       { kind: "system", ts, text: "stop_reason=EndTurn session=sess-1" },
diff --git a/packages/adapters/grok-local/src/ui/parse-stdout.ts b/packages/adapters/grok-local/src/ui/parse-stdout.ts
index 1222aa1efd8..e75e0271b7b 100644
--- a/packages/adapters/grok-local/src/ui/parse-stdout.ts
+++ b/packages/adapters/grok-local/src/ui/parse-stdout.ts
@@ -26,13 +26,13 @@ export function parseGrokStdoutLine(line: string, ts: string): TranscriptEntry[]
   const type = asString(parsed.type).trim();
 
   if (type === "thought") {
-    const text = asString(parsed.data).trim();
-    return text ? [{ kind: "thinking", ts, text }] : [];
+    const text = asString(parsed.data);
+    return text ? [{ kind: "thinking", ts, text, delta: true }] : [];
   }
 
   if (type === "text") {
     const text = asString(parsed.data);
-    return text ? [{ kind: "assistant", ts, text }] : [];
+    return text ? [{ kind: "assistant", ts, text, delta: true }] : [];
   }
 
   if (type === "error") {
diff --git a/ui/src/adapters/transcript.test.ts b/ui/src/adapters/transcript.test.ts
index ddd164a54d2..56627f328ad 100644
--- a/ui/src/adapters/transcript.test.ts
+++ b/ui/src/adapters/transcript.test.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it } from "vitest";
 import { buildTranscript, type RunLogChunk } from "./transcript";
+import { grokLocalUIAdapter } from "./grok-local";
 import type { UIAdapterModule } from "./types";
 
 describe("buildTranscript", () => {
@@ -182,4 +183,20 @@ describe("buildTranscript", () => {
       },
     ]);
   });
+
+  it("coalesces grok_local streaming text fragments into one assistant entry", () => {
+    const entries = buildTranscript(
+      [
+        { ts, stream: "stdout", chunk: `${JSON.stringify({ type: "text", data: "Hello " })}\n` },
+        { ts, stream: "stdout", chunk: `${JSON.stringify({ type: "text", data: "world" })}\n` },
+        { ts, stream: "stdout", chunk: `${JSON.stringify({ type: "end", stopReason: "EndTurn", sessionId: "sess-1" })}\n` },
+      ],
+      grokLocalUIAdapter,
+    );
+
+    expect(entries).toEqual([
+      { kind: "assistant", ts, text: "Hello world", delta: true },
+      { kind: "system", ts, text: "stop_reason=EndTurn session=sess-1" },
+    ]);
+  });
 });