diff --git a/web/Dockerfile b/web/Dockerfile
index b2cb257..fb1f2d9 100644
--- a/web/Dockerfile
+++ b/web/Dockerfile
@@ -23,6 +23,7 @@ COPY --from=build /app/publish .
 # throughout the month production was quietly serving staging images. A status check
 # cannot tell one build from another; /version.json can, so the smoke job refuses to
 # pass until the host is actually serving THIS commit.
+# Deploy-timing probe 2026-08-24: first myAi deploy with the Watchtower trigger configured.
 ARG GIT_SHA=unknown
 RUN mkdir -p wwwroot && printf '{"version":"%s"}' "$GIT_SHA" > wwwroot/version.json
 ENTRYPOINT ["dotnet", "web.dll"]
\ No newline at end of file