The six orchestration patterns, each a miniature node-and-connector diagram with a flow dot walking its path — plus the edge case that breaks it and a one-line rule for when to reach for it.
a failed gate stops the chain
fixed steps, each checks the last
classify first, then specialise
run at once, merge or vote
subtasks decided at runtime
rejected, back with the notes
write, grade, repeat until it passes
no fixed path, it decides when done