packfile.h reads IGNEUM_STATE_LEAVES, IGNEUM_STATE_LEAVES_FNV64, the file name, root and block (generator 5 = class v5; a generator 5 pack without the count, or another class with one, is refused) and pf_load_leaves reads and checks leaves.bin; the loader test carries the class v5 cases known-failed first (no count, no file, a short file, one flipped bit, a v4 pack with a count) and the checked-in v5-dn3-epoch0 pack. The CUDA driver gains cuMemcpyHtoD; the emulation takes both igneum_build shapes (weak overloads) and refuses a shape mismatch. The OpenCL host sets the build arguments in one place for both shapes, uploads the leaves in --bench-pack, --serve and the compiled-in bench (the host reference derives words from the same leaves). The Metal worker's servePackDataset binds buffers 2 and 3 as packbench.swift does and self-tests the dataset head and last word against vectors.json. tools/class-v5: kits-remote.sh (the kit build and tests on igneum-build-1, the zip to /srv/artefacts/packs), fleet-cuda-v5-bench.sh (the fleet card), pc1-amd-v5-bench.ps1 (PC 1's 9070 XT through the coordinator).
Measured on the Mac under the measure lock, 7 October 2026: v5-dn3-epoch0 fingerprint 82b19cbde8557ea5 on Metal (packbench, M5 Max, 18:34:47Z, 14.163 MH/s GPU time) and on Apple OpenCL (--bench-pack, 18:34:59Z, 15.265 MH/s wall; the compiled-in bench's dataset self-test PASS at 18:34:54Z), cache FNV 7334fa46e5d972eb PASS, vectors 3 of 3 on both.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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