fix(http-body): keep emoji / surrogate pairs intact during error body truncation

maweibin · claude · maweibin · commit 8917491da21c · 2026-07-07T19:37:04.000+08:00
Use Array.from() to count full code points instead of UTF-16 code
units, preventing lone surrogates in diagnostic output.

Co-Authored-By: Claude Opus 4.8 &lt;noreply@anthropic.com&gt;
diff --git a/src/infra/http-body.ts b/src/infra/http-body.ts
@@ -313,7 +313,7 @@ export async function readResponseTextSnippet(
     return undefined;
   }
   if (collapsed.length > maxChars) {
-    return `${collapsed.slice(0, maxChars)}…`;
+    return `${Array.from(collapsed).slice(0, maxChars).join("")}…`;
   }
   return prefix.truncated ? `${collapsed}…` : collapsed;
 }

Original file line number	Diff line number	Diff line change
`@@ -313,7 +313,7 @@ export async function readResponseTextSnippet(`
`313`	`313`	`return undefined;`
`314`	`314`	`}`
`315`	`315`	`if (collapsed.length > maxChars) {`
`316`		- return `${collapsed.slice(0, maxChars)}…`;
	`316`	+ return `${Array.from(collapsed).slice(0, maxChars).join("")}…`;
`317`	`317`	`}`
`318`	`318`	return prefix.truncated ? `${collapsed}…` : collapsed;
`319`	`319`	`}`