From 76b19d889ee06271c223e212571e04f242c3c043 Mon Sep 17 00:00:00 2001
From: Chris Buetti <crb4595@gmail.com>
Date: Thu, 26 Mar 2026 16:44:58 +0100
Subject: [PATCH] Limit diff output to 55,000 characters

Limit the diff output to 55,000 characters and add a message indicating truncation.
---
 src/main.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/main.rs b/src/main.rs
index 4f11f36..776c7b8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -110,6 +110,21 @@ async fn main() -> Result<(), ()> {
         .stdout;
     let output = str::from_utf8(&output).unwrap();
 
+    // 16,385 token context minus 2,000 for completion and ~500 for system/function overhead.
+    // At ~4 chars/token, that's roughly 55,000 chars of diff we can safely include.
+    const MAX_DIFF_CHARS: usize = 55_000;
+    let output = if output.len() > MAX_DIFF_CHARS {
+        let truncated = &output[..output[..MAX_DIFF_CHARS].rfind('\n').unwrap_or(MAX_DIFF_CHARS)];
+        format!(
+            "{}\n\n[diff truncated — {}/{} bytes shown]",
+            truncated,
+            truncated.len(),
+            output.len()
+        )
+    } else {
+        output.to_string()
+    };
+
     if !cli.dry_run {
         info!("Loading Data...");
     }