Hoshe REQUEST_CHANGES + Tyre APPROVE:
- Cache key omitted world_seed → a cache reused across worlds could return
another seed's column. CacheKey is now (world_seed, body_id_hash, voxel_pos).
(Hoshe #1)
- Sub-chunk voxel seed reused SeedDomain::ChunkContext (tier-collision risk vs
the region meander seed). Add SeedDomain::Voxel = 9 (append-only, pin test
updated) and use it. (Hoshe #2, Tyre #1)
- get_or_derive forced callers to pre-compute body_id_hash while fnv1a_64 is
pub(crate). Drop the param; compute the hash internally. (Tyre #2)
- Fix two inaccurate comments (micro-relief range [-4,+3] not ±2; scatter mask
is 4-bit [0,15] not bits [4:6]). (Hoshe #3/#4)
- Strengthen the LRU eviction test: add a test-only contains_voxel() helper and
assert WHICH entry was evicted (refreshed pos survives, LRU pos evicted). (Hoshe #5)
- LRU O(capacity)-scan perf flagged on T-1031 (Tyre #3, deferred to the budget harness).
cargo test passes, clippy -D warnings clean, fmt clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
841e222192