Development record

An intent cannot say that it ships after another without being blocked from building: blocked_by makes abcd build refuse every step until the named intent ships (startBlockedRow in internal/core/intent/startcheck.go), and builds_on says nothing about order, so an intent whose one step needs another's capability (the model-matrix run's judging step needs abcdesign.app's session) has no edge that holds its shipping and frees its other steps.