Remove the peripheral sector (100° half-angle, reduced range) and blind
spot classification. The server now sends only tiles within the 120°
forward cone; the client renders previously-explored tiles behind the
player with a light fog overlay instead.
This eliminates complexity in both the cone classifier and the snapshot
protocol while preserving the core information asymmetry — you still
can't see behind you, and the monologue system (D-016) still bridges
the perceptual gap.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>