Punch list §25 item 4.3.6a complete.
capsules/fabric.4th blocks 4918-4920: UTF8-SEQ-LEN/UTF8-CONT? verbatim
from §27.6.2, DECODE-UTF8 dispatching to four UTF8-ASSEMBLE-N helpers
(1/2/3/4-byte). Factored into helpers after the single-word draft hit
mkcapsule's real 64-char x 16-line block limit. Verified live on
amd64: a 6-byte test buffer (ASCII + deg-sign + em-dash) decoded to
65/176/8212 across three sequential calls, exact match against
hand-computed codepoints, buffer fully consumed. Three-arch acceptance
boot clean, Stadium conservation unaffected.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
