diff --git a/.gitignore b/.gitignore
index 6384ee8f..9cfd3fb1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,9 +23,11 @@ yarn-error.log*
 .claude/settings.local.json
 
 # Signal files written by upstream-release-docs.yml for the skill to
-# communicate gaps or no-op releases back to the workflow. Never committed.
+# communicate gaps, no-op releases, or a change summary back to the
+# workflow. Never committed; the workflow reads and removes them.
 /GAPS.md
 /NO_CHANGES.md
+/SUMMARY.md
 .claude/scheduled_tasks.lock
 
 # Scratch workspace claude-code-action creates during skill runs.