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Cut 12.3: one apply path for all items (operator ruling)

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Meta Vens 2026-09-25 16:22:44 +02:00
commit 14ee2a52ca
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docs/fire-control-cut.md
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@ -2559,7 +2559,14 @@ Alternative: keep the processing order and pin it.
**Ruled 2026-09-25: proportional absorption.** Operator: "proportional absorption; go". A multi-cell
item struck by several lanes of one shot absorbs from their combined incoming damage, and each lane
carries on with a leftover in proportion to what it brought. The result must not depend on the order
lanes are processed; with no shared item it equals sequential absorption exactly.
lanes are processed. A single-lane item is the degenerate case of the same rule, not a separate path.
**Ruled 2026-09-25: one code path.** Operator: "Do not expect items taking up multiple cells to be an
exception, this should be one code path." The first implementation (`56757913`) surveyed each shot
for shared items and took either `ApplySequential` or `ApplyWithSharedItems`. That was a split
authority, and the second reachability derivation it needed is the same failure as the 12.2 empty
lane and the 12.3 double strike. `Apply` has one walk, in which every item pools the deposits of
the lanes that reach it, a pool of one lane included. The survey and the sequential path die.
### Cut 12.4. The detonation primitive