From d6e9ae53fee5caa79e89254ed35fb3beed55d30a Mon Sep 17 00:00:00 2001
From: Peter Steinberger <steipete@gmail.com>
Date: Sat, 25 Apr 2026 12:48:20 +0100
Subject: [PATCH] perf: split chat strip helper

---
 ui/src/ui/chat/message-extract.ts | 2 +-
 ui/src/ui/format.ts               | 6 +-----
 ui/src/ui/strip-thinking-tags.ts  | 5 +++++
 3 files changed, 7 insertions(+), 6 deletions(-)
 create mode 100644 ui/src/ui/strip-thinking-tags.ts

diff --git a/ui/src/ui/chat/message-extract.ts b/ui/src/ui/chat/message-extract.ts
index bfae47a98e6..a233a0d7c6e 100644
--- a/ui/src/ui/chat/message-extract.ts
+++ b/ui/src/ui/chat/message-extract.ts
@@ -2,8 +2,8 @@ import { stripInternalRuntimeContext } from "../../../../src/agents/internal-run
 import { stripInboundMetadata } from "../../../../src/auto-reply/reply/strip-inbound-meta.js";
 import { stripEnvelope } from "../../../../src/shared/chat-envelope.js";
 import { extractAssistantVisibleText as extractSharedAssistantVisibleText } from "../../../../src/shared/chat-message-content.js";
-import { stripThinkingTags } from "../format.ts";
 import { normalizeLowercaseStringOrEmpty } from "../string-coerce.ts";
+import { stripThinkingTags } from "../strip-thinking-tags.ts";
 
 const textCache = new WeakMap<object, string | null>();
 const thinkingCache = new WeakMap<object, string | null>();
diff --git a/ui/src/ui/format.ts b/ui/src/ui/format.ts
index a65f40ed2d2..f982c0700b0 100644
--- a/ui/src/ui/format.ts
+++ b/ui/src/ui/format.ts
@@ -1,9 +1,9 @@
 import { formatDurationHuman } from "../../../src/infra/format-time/format-duration.ts";
 import { formatRelativeTimestamp } from "../../../src/infra/format-time/format-relative.ts";
-import { stripAssistantInternalScaffolding } from "../../../src/shared/text/assistant-visible-text.js";
 import { t } from "../i18n/index.ts";
 
 export { formatRelativeTimestamp, formatDurationHuman };
+export { stripThinkingTags } from "./strip-thinking-tags.ts";
 
 export function formatUnknownText(
   value: unknown,
@@ -80,10 +80,6 @@ export function toNumber(value: string, fallback: number): number {
   return Number.isFinite(n) ? n : fallback;
 }
 
-export function stripThinkingTags(value: string): string {
-  return stripAssistantInternalScaffolding(value);
-}
-
 export function formatCost(cost: number | null | undefined, fallback = "$0.00"): string {
   if (cost == null || !Number.isFinite(cost)) {
     return fallback;
diff --git a/ui/src/ui/strip-thinking-tags.ts b/ui/src/ui/strip-thinking-tags.ts
new file mode 100644
index 00000000000..8ae24dcecdb
--- /dev/null
+++ b/ui/src/ui/strip-thinking-tags.ts
@@ -0,0 +1,5 @@
+import { stripAssistantInternalScaffolding } from "../../../src/shared/text/assistant-visible-text.js";
+
+export function stripThinkingTags(value: string): string {
+  return stripAssistantInternalScaffolding(value);
+}