nx_engine_stream_gate.nx

nx_engine_stream_gate.nx -- ★R6 GENERATIVE STREAMING (the Cesium-convergence rung, taken the fusion way): Cesium streams STORED tiles (3D Tiles servers); we REGENERATE chunks from seed as the viewer travels -- the GENERATOR is the tile server (zero stored tiles, integer-deterministic). A viewer walks a 10-station journey across the nx_worldpipe world; at each station the working set is regenerated: near chunks fine, far chunks coarse, chunks behind EVICTED. T1 UNBOUNDED WORLD / BOUNDED BUFFER: the journey's cumulative unique-chunk geometry EXCEEDS the mesh caps (the whole world cannot exist at once) while every station fits comfortably. T2 DETERMINISTIC REVISIT: returning to station 0 regenerates chunk (0,0) BIT-IDENTICALLY (hash-equal) -- no tile store needed, the seed IS the storage. T3 SEAMS: same-LOD adjacent chunks share edge heights EXACTLY (one height function, one seed). LOD-boundary T-junction cracks are NAMED as residual (the skirt/stitching rung). T4 EVICTION is real: at a far station the old origin chunks are GONE from the buffer. T5 evidence: three stations of the journey rendered (textured + sun-shadowed). license_tier: ORIGINAL expect_exit: 0