vecnode/dsh-proto-lab

A prototyping lab the agent can fill: five lab_* tools that write a run into lab/<runtime>/<slug>/ - p5.js sketches that open in a browser, and openFrameworks projects that are three real C++ files built with make - plus a committed example library the agent instantiates from, a runtime registry built so a third runtime (Processing in Rust, Cinder) is one module and one line, and a preview tab over an offline-vendored p5.js. Zero npm dependencies, nothing downloaded, no binaries.