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discountry
448a2f2615
Two more clusters lifted out of the engine, both defined by latches whose only correctness property is that they move together: - TokenExpiryGuard owns the five flags (state, logged, notified, cancelDone, closeOnly) that make each consequence of an expired StandX token happen once per episode and re-arm when a fresh token arrives. evaluate() returns a decision instead of a bare boolean, so the tick reads what it means. - IsolatedMarginGuard owns the single in-flight switch promise that stops concurrent ticks from stacking margin-mode change requests, plus the poll-until-confirmed loop. Both were previously reachable only through a live adapter; they now have 22 unit tests between them, covering the latch reset across a token renewal, the cancel retry after a failure, unknown-order treated as success, and the concurrent-tick sharing of one margin switch. Confirm cadence kept at 500ms x 10 to match the engine's original constants. 271 pass; tsc and oxlint clean. Engine 1939 -> 1826 lines.