SELF-CHECK FAILED — see board

truncate · preserve

the cut that keeps · E1 midstream
EARTH ochre generates METAL steel · ore ▸ blade ▸ bank · smallest cut takes only the ore

◆ earth · the clay ore in the ground

│ observe ▸ distinguish ▸ smallest cut │

▲ metal · the blade truncate to the palindrome

│ transmuted +1 ▸ preserved (self-mirror) │

◆ earth · the bank father|son|son|father, kept

press dig to load ore, cut & bank to truncate-preserve, then run self-check. built to pass.
what this is, plainly: the clay (a run) is mostly dross with a bit of ore in it. the blade (truncate) cuts away everything but the palindrome — father|son|son|father, the part that reads the same both ways. that gets banked. a palindrome checks itself: read it backward, compare — if the two fathers still match, it's intact; if not, it's corrupted. so the bank needs no separate checksum. the smallest cut takes only the ore, never the dross around it. tamper a banked frame and the self-check catches it, because the mirror stops matching.
ornament: the colour bands + glyphs are decorative. the cells, the cut, and the self-check verdicts are load-bearing (the run reads them).