feat(levels): D5 three-rotation prototype

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The shipped 1000 levels have a hole: 568 of them need no rotation at all, and
none needs more than two — the mechanic the game is built on is mostly
decoration. This fills the empty band with levels that need at least three.

createDeepLock builds a four-piece chain where each link only releases at a
later orientation, and growDeepLevel packs the rest of the board around it
without opening a shortcut. Candidate pools are built per orientation and left
untruncated; ranking by bend count first starved the packer and capped levels
at four to six pieces instead of twelve.

deadTurnAudit enumerates every reachable (orientation, remaining-set) state to
prove no dead ends exist, and counts how long a player can be left with
nothing to do — solvable and feeling solvable are different things, which is
what "level 2 is impossible" turned out to be about.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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cabinw

2026-09-14 14:00:33 +08:00

co-authored by Claude Opus 5

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commit 643cba0ed9

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levels/prototypes/d5.json

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