v3.0-alpha band room. New pub recipe (venue:true): stage + PA + amps at the back wall (new stage/paSpeaker/ampStack fittings, GLB slots stage/pa_speaker/amp for E), bar counter (keeper), sticky carpet, blocked back door = green room.
buildInterior returns for venues: room.watchPoints[] (6-8 seeded audience poses {x,z,ry,dance} facing the stage, dance ~1/3, counter.stand ry convention); room.stage {x,z,w,d,deckY,frontZ,bandPoses[3]} for Lane D's band; room.audio.gigKey ('gig-'+genreKey) set when Lane F passes opts.gig.
Flags-off byte-identical: venue code runs only for recipe.venue on its own seed sub-streams; non-pub rooms have watchPoints:[], stage:null, unchanged placement/audio.
Verified: 40-seed pub sweep (0 throws/carves/path-fails, 8 watchPoints, dance 0.38) + 60-room mixed soak (0 det/path fails, leak geo0/tex0, worst 19ms). Non-pub unchanged. Interface for D/F: docs/LANES/LANE_C_PUB.md. scaffold + manifest green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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