Axel Meyer e082a39596 Add save_to_disk round-trip and determinism asserts ...

Verifies the saved JSON is readable, that two successive saves
produce byte-identical output, and that re-loading the saved file
recovers the same cell values that were written before saving.
Uses engine.module.dir_of to write the round-trip fixture to the
lib maps/ directory (asset sandbox rejects absolute temp paths).

2026-05-24 00:43:31 +02:00

18 KiB

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