Why

Contact destruction can remove a word after the last rule scan of a turn. The settled rule table then contains a sentence that no longer exists, and the next input can be blocked by a phantom property. Tidewater has a concrete ROCK IS STOP reproduction and cannot be bundled reliably until this is fixed.

What Changes

• Recompute active rules, sentence spans, property indexes, and derived automata carriers after contact removals before exposing settled state.
• Make the settled turn's rule deltas and control status reflect the surviving board.
• Add a regression for a STOP word destroyed by SINK, including the next move, Undo, reset, and state restoration.
• Preserve the established single contact pass and its SINK → DEFEAT → WIN order; broader contact cascades and rule precedence changes remain separate work.

Capabilities

New Capabilities

None.

Modified Capabilities

• rule-engine: settled rules and derived properties must match surviving word entities after contact destruction.

Impact

• Engine turn settlement and rule indexes; returned state and event rule deltas.
• Undo, reset, replay/restore, and solver consumers of settled snapshots.
• Tidewater re-verification against the corrected rule behavior.