I wanted to describe a network, not assemble it: FlowBuilder in flodl

Last post was why. This one is what it looks like. The thing I said at the end of last post was: with flodl I don't rewrite when I pivot. I add or remove a graph member. This post is the primitive that makes that sentence true. Meet FlowBuilder. It's a declarative graph DSL for neural networks, and it's the API I'd find hardest to give up. The gap By my third Python pivot, the wiring code outweighed the model. Freezing submodules, loading partial checkpoints, rerouting a tensor through a newly-i