diff --git a/core-concepts.mdx b/core-concepts.mdx
index 6416003..4350ae3 100644
--- a/core-concepts.mdx
+++ b/core-concepts.mdx
@@ -40,6 +40,7 @@ partio/checkpoints/v1  (branch)
         └── 0/
             ├── content_hash.txt
             ├── context.md
+            ├── diff.patch
             ├── full.jsonl
             ├── metadata.json
             └── prompt.txt