D measured it live: interact.js gated the shed-table spare on !player.carrying
alone, never reading the count, so a player who bought zero walked off with
unlimited free shackles mid-storm — the spare economy the ladder cost is
balanced against, free on the spare side, on the public deploy.
My half of the cross-lane seam: RiggingSession gains sparesRemaining (getter)
and takeSpare(). `spares` is the shed-table count, so takeSpare() decrements it
— which also fixes a second bug for free: main.js:720 refunds
session.spares * SPARE_COST as "a spare you never had to use", so you were being
refunded for spares you'd already spent. Decrementing makes that honest with no
change to main.js.
Wiring stays A's (thread the session into wireYardActions) and the gate+consume
stays D's (two lines, posted in THREADS, D offered). Asserted: take-without-buy
fails, table runs dry, consumed spare no longer refundable.
rigging.selftest 21/21.
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