NEW: PORTAL PAGE (BOUNDARY OUTPUT AS THRESHOLD)
SUBSTRATE now opens with a white-field boundary-output page — an instrument panel you pass through before the black UI resolves.
Not a splash screen. A threshold.
Why:
Boundary-output as boundary: the visitor has to cross a diagnostic surface before the system “lands.” Interface, not interior.
Polarity flip: white → black reads like a deliberate inversion (specimen sheet → containment system).
{ ENTER } / ∅: quiet procedural symbols — access implied, disclosure refused.
The HUD stays minimal: enough telemetry to suggest presence without turning it into a catalogue.
Revisit: from the homepage, press p to reopen the portal.
SUBSTRATE.HOST — physical hosts for inaccessible interiors. HOST: SCANNING / INTERIOR: INACCESSIBLE ∅
