From 7ec32f834ecad7b9b18439b938cc67c590a36b79 Mon Sep 17 00:00:00 2001
From: Dax Raad <d@ironbay.co>
Date: Thu, 13 Nov 2025 21:41:06 -0500
Subject: [PATCH] improve read tool end-of-file detection to prevent infinite
 loops

---
 packages/opencode/src/tool/read.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/opencode/src/tool/read.ts b/packages/opencode/src/tool/read.ts
index fc33463a..7dc41ea5 100644
--- a/packages/opencode/src/tool/read.ts
+++ b/packages/opencode/src/tool/read.ts
@@ -134,8 +134,14 @@ export const ReadTool = Tool.define("read", {
     let output = "<file>\n"
     output += content.join("\n")
 
-    if (lines.length > offset + content.length) {
-      output += `\n\n(File has more lines. Use 'offset' parameter to read beyond line ${offset + content.length})`
+    const totalLines = lines.length
+    const lastReadLine = offset + content.length
+    const hasMoreLines = totalLines > lastReadLine
+
+    if (hasMoreLines) {
+      output += `\n\n(File has more lines. Use 'offset' parameter to read beyond line ${lastReadLine})`
+    } else {
+      output += `\n\n(End of file - total ${totalLines} lines)`
     }
     output += "\n</file>"