A step's key keeps its answer only within what the steps state holds per value (kvlimit.ModuleStateValueBytes less
the headers' room). Over it, finish keeps the answer with the holder's KeepOutput as the object output.<ask> in its
outputs store and the key names it in output-object: a check's whole answer, its result emptied; a run's output, the
key keeping the run answer without it. An answer that cannot be kept ends the key failed, saying why. The Puller says
step-ended from the end finish wrote, so the key and the event say one outcome: a run whose program exited other than
0 ends its key failed as well, its answer kept; step-ended names the object finish kept instead of putting it twice.
Step.Whole reads a key's object back through the seat's verb output on the step's node. The part build-step's Step
gains output-object, the verb output says it answers a step's answer; fixtures and the generated contracts follow.
Builds: design 47 G A-290, A-254, §467
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h
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