k8s sandbox runs fail because the run path never sets the lease remoteCwd (paperclipai/paperclip#13864). The fix, paperclipai/paperclip#13733, is not merged upstream yet. Build our own image from the master commit the nightly runs now plus that patch, and point Flux image automation at it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>