Clarify duplicate PR situation for issue #1

RESPONSE.md

@@ -0,0 +1,41 @@
+# Response to Issue #1 Comment
+
+## Question
+@retog asked: "why two PRs? Does #3 supersede #2?"
+
+## Answer
+
+Both PR #2 and PR #3 were created within seconds of each other (at 09:52:40 and 09:52:43 respectively) to address the same issue (#1). They both implement the on-demand file merge feature with nquads/ntriples endpoints.
+
+### Key Differences
+
+**PR #2** (`copilot/add-on-demand-file-merge`)
+- 5 commits
+- 604 additions, 68 deletions
+- 8 files changed
+- Last updated: 10:16:44
+- More comprehensive implementation
+
+**PR #3** (`copilot/add-on-demand-file-merge-again`)
+- 4 commits
+- 334 additions, 57 deletions
+- 6 files changed
+- Last updated: 10:11:24
+- Smaller implementation
+
+### Recommendation
+
+**PR #2 appears to be the more complete implementation** with:
+- More code changes (604 vs 334 additions)
+- More files modified (8 vs 6)
+- A later final update timestamp
+
+PR #3 does not supersede PR #2. Instead, it appears that both PRs were created simultaneously (possibly due to a system issue), and PR #2 continued to receive more updates and is the more complete solution.
+
+### Suggested Action
+
+I recommend:
+1. **Reviewing and potentially merging PR #2** as it contains the more comprehensive implementation
+2. **Closing PR #3** as it's a duplicate with less complete changes
+
+Both PRs implement the same feature requirements from issue #1, but PR #2 has the more thorough implementation.