The phase ran before the cutover as Part 12 planned, and found what it was meant
to: the inverted slot direction worked for module-uo and nobody else. Recorded
beside the phase entry, with the org lead's two decisions of the day - core
offers a contribution rather than naming a slot, and the template grows a real
provider rather than a snippet.
Also records the live-rig walk and the one defect it found that no test could:
PageHeader takes `lead`, not `subtitle`, and React drops an unknown prop in
silence, so every page built from the kit's template had been rendering its
heading with nothing under it.
Co-Authored-By: Claude <noreply@anthropic.com>
