diff --git a/.devkit.yml b/.devkit.yml
index e2e240f..43ad064 100644
--- a/.devkit.yml
+++ b/.devkit.yml
@@ -4,3 +4,11 @@ display_name: DiffVisualizer
 # e2e_pod_env:
 #   A0_DIFF_VISUALIZER_TEST_PROBE: "1"
 devkit_major: 2
+
+# Test against UPSTREAM A0, not the private fork (DEC-082).
+#
+# The devkit default is ghcr.io/nuevanext/agent-zero:latest-nonroot, so without
+# this line every PR proved the plugin worked on the fork while upstream — the
+# only thing anyone actually runs — was verified nowhere. Overriding per repo
+# rather than changing the devkit default keeps the blast radius to this plugin.
+a0_image: docker.io/agent0ai/agent-zero:latest