Range measured: all 27 levels, 1123 chunks, over the 900000 bytes before the
constant trailer.
Method: compare header byte 14 against the number of offsets actually resolved
for that chunk.
Result: byte 14 equals the record count on 1123 of 1123 chunks, zero
mismatches. This is the first genuinely decoded field in this container rather
than a measured correlation.
The parser now truncates the offset table to header byte 14, so a stray
tagged word in a chunk's record data cannot silently extend the table and put
the count at odds with its own header.
Two more header bytes are near-constant and read as ASCII: byte 13 takes only
0x45 (1076 chunks) and 0x46 (47); byte 9 takes 0x44 (26), 0x45 (1084) and
0x46 (13). Those are D, E and F -- a three-letter tag at two byte positions
with different distributions. Recorded as suggestive, not established: the
other 14 header bytes are high-entropy and read as ASCII at no shift tried, so
the D/E/F may be incidental. Worth testing against a known type table.
Still open: the 14 opaque header bytes, whether bytes 9 and 13 are type tags,
which record fields are index/length/offset, and whether a chunk is moby_anim.
ReaperOfVeriod
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