Fix runaway memory usage of the books cache (mmap + LRU) and >4 GiB book corruption#7

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McSon2 wants to merge 2 commits into

simnJS:mainfrom

McSon2:fix/lgs-books-memory

Commits on Jul 12, 2026

fix(lgs): bound books cache memory with mmap-backed storage and LRU eviction

McSon2
and
claude
committed
fix(lgs): accept integer or float mode costs in index.json

McSon2
and
claude
committed