Stubs removed per Paul (register: values remain harmless family hints;
nothing points at the files anymore). craft.md now opens by defining
itself against plain invocation: a bare build request goes straight
through the gate and the craft floor; craft is the supervised path with
guaranteed checkpoints and the mock pipeline. One shipping-discipline
line joins the core floor (real content, interaction states, respect
the build pipeline) so one-shots inherit the bar that previously lived
only in craft's Step 4.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>