Close out SW4

Shipped

August 26, 2026 at 9:27 PM UTC

Author

kamo

Commit

4136abc

Nine departures. The two that matter most: this plan's own Self-Review asserted a type was consistent across three places, and it was consistent and wrong; and the D4 test was a tautology that would have passed with both guards deleted. Also records that the cp -al build-copy recipe was never isolating source.