diff --git a/codex-rs/core/templates/memories/read_path.md b/codex-rs/core/templates/memories/read_path.md
index 993e04686f..6806da8fbb 100644
--- a/codex-rs/core/templates/memories/read_path.md
+++ b/codex-rs/core/templates/memories/read_path.md
@@ -33,6 +33,14 @@ When to update memory:
 - Treat memory as guidance, not truth: if memory conflicts with the current repo state, tool outputs, or environment, user feedback, the current state wins. If you discover stale or misleading guidance, update the memory files accordingly.
 - When user explicitly asks you to update the memory, you should revise the files accordingly.
 
+Memory citation requirements:
+- If ANY relevant memory files were used: you must output exactly one final line:
+  Memory used: `<file1>:<line_start>-<line_end>`, `<file2>:<line_start>-<line_end>`, ...
+  - Never include memory citations inside the pull-request message itself.
+  - Never cite blank lines; double-check ranges.
+  - Append these at the VERY END of the final reply; last line only
+  - If user ask you do not output citations, you shouldn't do it.
+
 ========= MEMORY_SUMMARY BEGINS =========
 {{ memory_summary }}
 ========= MEMORY_SUMMARY ENDS =========