diff --git a/README.md b/README.md
index e93f071..f3a43d5 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # Answer Diff
 
+> [!IMPORTANT]
+> Canonical development has been consolidated into [`vigilanty0x/promptops`](https://github.com/vigilanty0x/promptops), under [`packages/answer-diff`](https://github.com/vigilanty0x/promptops/tree/main/packages/answer-diff). This repository remains available to preserve its source history and compatibility reference. The imported `0.1.0` package keeps the `answer-diff` distribution and CLI names. This notice does not claim a package-index transfer or publication.
+
 Machine-readable answer diffs with token and similarity evidence.
 
 Offline Python 3.11+ MVP with zero runtime dependencies, deterministic JSON evidence, bounded inputs, a CLI, synthetic tests, and fail-visible errors.