nx_colframe.nx

nx_colframe.nx -- SOVEREIGN ZERO-COPY COLUMNAR INTERCHANGE (arrow-interchange, F-arrow). The Arrow idea, built from the first byte up as our OWN format, not a clone: a single self-describing contiguous buffer that carries N columns COLUMNAR (each column packed contiguously, 8-byte aligned), so any organ that receives the buffer reads a whole column with ONE pointer cast -- zero per-value deserialization, zero copy on the read side. Cross-organ dataset passing becomes "hand over a pointer + a length". THE EXACT BYTE LAYOUT (all fields native i64 little-endian; the value IS the layout): [0] magic = CF_MAGIC (identifies + versions the frame) [1] version = CF_VERSION [2] ncol [3] nrows then a SCHEMA table of ncol entries, 3 i64 each (i64-index 4 + i*3): [+0] type (CF_T_I64 = 0; the v1 type) [+1] name_off (byte offset to the column's NUL-terminated name) [+2] data_off (byte offset to the column's data; 8-BYTE ALIGNED so the *i64 cast is valid+fast) then the packed name strings, then each column's nrows*8 bytes of i64 data. ZERO-COPY is provable, not asserted: cf_col(buf,i) returns buf+data_off -- a pointer INTO the shared buffer. Called twice it returns the SAME address (a view, never a per-call materialisation), and an analytics organ runs DIRECTLY on that view. EXCEED vs Arrow: 100% integer/fixed layout => bit-identical frames across runs (Arrow's buffers carry padding/impl variance). license_tier: ORIGINAL No hw writes.