diff --git a/simulation-readme-20251121-161112.md b/simulation-readme-20251121-161112.md
new file mode 100644
index 000000000000..01e78f341216
--- /dev/null
+++ b/simulation-readme-20251121-161112.md
@@ -0,0 +1,27 @@
+# PR Simulation README
+
+## Simulation Details
+- **Timestamp**: 2025-11-21T16:11:12+05:30
+- **Original PR**: #148549
+- **Original Title**: sql: fix COPY with some concurrent schema changes
+- **Original Author**: yuzefovich
+- **Original URL**: https://github.com/cockroachdb/cockroach/pull/148549
+
+## Original PR Timeline
+- **Created**: 2025-06-19T03:35:01Z
+- **Queue Entry**: N/A
+- **CI Start**: N/A
+- **CI Completion**: N/A
+- **Merged**: 2025-11-12T04:56:26Z
+
+## Simulation Purpose
+This PR is part of a merge queue vendor comparison simulation.
+It replicates the timing and behavior of the original PR for testing purposes.
+
+## Timing Information
+- **CI Wait Duration**: N/A
+- **CI Run Duration**: N/A  
+- **Total Queue Duration**: N/A
+
+---
+*Generated by pr-simulation tool at 2025-11-21T16:11:13+05:30*