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ajandClaude Opus 5.5
322a66c339
The "cut those two the other way round" rule is a guess. On an interlocked
holed-parts plate it swapped a pair whose swapped order then blocked on that
same pair; no further rule could be learned, the full search ran the strict
budget out, and Plan Cutting fell back to the safest route (0 strict
expansions), failing ContourRecoveryFileTests' interlocked rows since
16bd9256.
When a round teaches nothing and a swap was learned, the newest swap is now
taken back, never re-learned, and the attempt that taught it learns the plain
"cut this part before those" rule instead, backing up from that attempt as
any learned rule does. The swap is chosen apart from the plain rules, so a
"departed part first" rule with the same pair is never taken for a swap.
Both interlocked rows plan Ready within budget again. The problem-nest corpus
keeps every status and expansion count; a 4000-layout random sweep of 3-5
locked-lead rectangles keeps every status.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>