Detailed 22-task plan for the foundation wave (build pipeline + theme
port + every CSS primitive, no page migration yet). Smoke-test page at
_primitives-smoke.html is the wave-1 QA gate. Waves 2-4 will get their
own plan documents after each prior wave ships.
Captures the full commit list, current cluster state, the 172.18 LAN topology gotcha, the remaining recorders.html UI rewrite, and how the next agent should pick it up.
