From 6425531d9674b20bdeaaa14f6695580cae731db3 Mon Sep 17 00:00:00 2001
From: shenghui kevin <shenghuikevin@kevindeMacBook-Air.local>
Date: Sat, 21 Feb 2026 18:41:46 -0800
Subject: [PATCH] fix: add length check after trailing newline pop in
 BlockAnchorReplacer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 packages/opencode/src/tool/edit.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/opencode/src/tool/edit.ts b/packages/opencode/src/tool/edit.ts
index 7a097d3fe1..5b525a454d 100644
--- a/packages/opencode/src/tool/edit.ts
+++ b/packages/opencode/src/tool/edit.ts
@@ -236,6 +236,10 @@ export const BlockAnchorReplacer: Replacer = function* (content, find) {
     searchLines.pop()
   }
 
+  if (searchLines.length < 3) {
+    return
+  }
+
   const firstLineSearch = searchLines[0].trim()
   const lastLineSearch = searchLines[searchLines.length - 1].trim()
   const searchBlockSize = searchLines.length