A check step that errors after its fetch merged ends failed with its answer (the fetch and the levels so far)
beside its error (steprun askrun.go), and the checker previews the merge from it (judge.go), so a failed level
no longer hides the manifest validator and the composition (try 2: catalog, contracts and delivery were
unpreviewed by a seatgen bootstrap failure, not a conflict). Only a head that does not merge or a fetch that
did not answer stays unpreviewed, and the check says which.
Builds: design 47 G A-286 (hq 41dd30fe)
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
jschoubben
5fbc366f1b