diff --git a/.github/docker/Dockerfile.ci b/.github/docker/Dockerfile.ci
index 8393ffcb..6fbfefb0 100644
--- a/.github/docker/Dockerfile.ci
+++ b/.github/docker/Dockerfile.ci
@@ -61,5 +61,6 @@ RUN useradd -m -s /bin/bash runner \
     && chmod 1777 /tmp \
     && mkdir -p /home/runner/.bun && chown -R runner:runner /home/runner/.bun
 
-# Switch to runner user — bun needs HOME-writable for temp files
-USER runner
+# NOTE: Do NOT use USER runner here — GH Actions overrides USER and HOME
+# anyway, creating permission conflicts. Instead, we run as root (GH default)
+# and use gosu/su-exec for claude commands that refuse root.