workbooks docs

#+EXEC shapes

#+EXECABIinvoked bybuilds
commandargv + stdin → stdoutagent, workflowyes
componentWIT-typed, in-processcomponent, workflowyes
kernelbytes → bytes hot loopthe fabricyes
taskrunnable recipeagentno
federationOQL data source + syncthe query layermixed
posixnative binaryagent, workflowno

Each shape in depth, with when to use it: The six shapes.