Step 5 iterated holder.items live while handlers move and destroy pieces: normal 博士投影
splices itself out (the next item on that holder was skipped) and 突变细胞 transforms its
holder (the next item ran with a holder that was gone). It now walks a copy and runs an item
only while it is still equipped on its still-owned holder; the rule is in the header and
META.md. Tests use a synthetic spy handler after the 突变细胞 and after 博士投影.
sganggs
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