1## Why23The W6 audit found several Baba-compatible edge cases where collision and rule-reading order can change the result: STOP/PUSH overlap, singleton YOU+DEFEAT, self-transform rules, competing transformations, one-link chains, and stacked-cell alternatives. These cases need one deterministic contract before Crossword and other worlds are reworked.45## What Changes67- Define PUSH precedence over STOP when the same object carries both properties.8- Resolve singleton YOU+DEFEAT and DEFEAT-before-WIN contacts deterministically.9- Suppress `X IS X` as a no-op that masks other transformations for X.10- Resolve competing noun transformations by spatial rule-reading order and apply only one link per turn.11- Preserve deterministic one-link transformation chains.12- Select one word per stacked cell/path while enumerating every valid grammar alternative, including sentences that start at a stacked cell.1314## Capabilities1516### New Capabilities1718- `rule-precedence-and-reading`: deterministic collision, contact, transformation, and rule-reading semantics for Baba-compatible levels.1920### Modified Capabilities2122None. This change is intentionally isolated until the worlds team confirms the stacked-cell grammar choice.2324## Impact2526- Affected engine contact resolution, transformation selection, and rule parser ordering.27- Requires focused engine fixtures for the audited cases and follow-up world solver checks.28- Crossword shove-the-danger and carry-the-pair content remains deferred until the grammar question is answered.