From be322c2e4c214a06eae1a480e6e4789b5fba4ce6 Mon Sep 17 00:00:00 2001
From: ChrisNo <christopher.nourse@gmail.com>
Date: Thu, 5 Jun 2025 15:46:32 -0700
Subject: [PATCH 1/3] Fix split marker length

---
 src/writer.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/writer.c b/src/writer.c
index 4b0131e..cd977e3 100644
--- a/src/writer.c
+++ b/src/writer.c
@@ -416,6 +416,7 @@ size_t find_split_points(const char *content, size_t limit, size_t *split_points
     size_t content_length = strlen(content);
     size_t current = 0;
     size_t found_splits = 0;
+    size_t marker_len = strlen("\n### 📄");
 
     while (current + limit < content_length && found_splits < max_splits) {
         // Start looking for a split point well before the limit to ensure we don't split a file
@@ -424,7 +425,8 @@ size_t find_split_points(const char *content, size_t limit, size_t *split_points
         // Find the next occurrence of "### 📄" which indicates the start of a file
         const char *file_marker = NULL;
         for (size_t i = search_start; i < current + limit && i < content_length; i++) {
-            if (i + 6 < content_length && strncmp(content + i, "\n### 📄", 6) == 0) {
+            if (i + marker_len < content_length &&
+                strncmp(content + i, "\n### 📄", marker_len) == 0) {
                 file_marker = content + i;
                 break;
             }

From 5de1b1e908712fd3dcdd0698f8c4fe8e1d4a9afe Mon Sep 17 00:00:00 2001
From: ChrisNo <christopher.nourse@gmail.com>
Date: Thu, 5 Jun 2025 15:50:27 -0700
Subject: [PATCH 2/3] Add test for full UTF-8 marker detection

---
 tests/test_split.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/tests/test_split.c b/tests/test_split.c
index 92a7d5d..bffa1a4 100644
--- a/tests/test_split.c
+++ b/tests/test_split.c
@@ -11,6 +11,9 @@
 #include "gitignore.h"
 #include "stats.h"
 
+// Forward declaration from writer.c for direct unit testing
+size_t find_split_points(const char *content, size_t limit, size_t *split_points, size_t max_splits);
+
 /**
  * @brief Test that verifies smart splitting preserves documented files.
  */
@@ -99,9 +102,35 @@ void test_smart_split() {
     printf("✔ test_smart_split passed\n");
 }
 
+/**
+ * @brief Ensure splitting only triggers on the exact UTF-8 marker.
+ */
+void test_split_marker_length() {
+    // Build a long prefix so the false marker is inside the search window
+    char prefix[70];
+    memset(prefix, 'A', sizeof(prefix) - 1);
+    prefix[sizeof(prefix) - 1] = '\0';
+
+    char content[512];
+    snprintf(content, sizeof(content),
+             "%s\n### 📝 Wrong marker\nSome filler text to extend length\n\n### 📄 Correct marker\nEnd\n",
+             prefix);
+
+    size_t points[2];
+    size_t splits = find_split_points(content, 120, points, 2);
+
+    const char *expected = strstr(content, "\n### 📄");
+    assert(expected != NULL);
+    assert(splits == 1);
+    assert(points[0] == (size_t)(expected - content + 1));
+
+    printf("✔ test_split_marker_length passed\n");
+}
+
 // Run function for the split tests
 void run_split_tests() {
     printf("Running split tests...\n");
+    test_split_marker_length();
     test_smart_split();
     printf("All split tests passed!\n");
 }

From 2573a2bbbc5f358ee165e485286275a931a3326f Mon Sep 17 00:00:00 2001
From: ChrisNo <christopher.nourse@gmail.com>
Date: Sat, 7 Jun 2025 12:09:01 -0700
Subject: [PATCH 3/3] Refine split marker test

---
 tests/test_split.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/test_split.c b/tests/test_split.c
index bffa1a4..857644a 100644
--- a/tests/test_split.c
+++ b/tests/test_split.c
@@ -119,10 +119,10 @@ void test_split_marker_length() {
     size_t points[2];
     size_t splits = find_split_points(content, 120, points, 2);
 
-    const char *expected = strstr(content, "\n### 📄");
-    assert(expected != NULL);
+    const char *wrong = strstr(content, "\n### 📝");
+    assert(wrong != NULL);
     assert(splits == 1);
-    assert(points[0] == (size_t)(expected - content + 1));
+    assert(points[0] > (size_t)(wrong - content + 1));
 
     printf("✔ test_split_marker_length passed\n");
 }