Docs: rusty-kaspa fork map and 3-node devnet bench entry

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/bench-log.md

@@ -123,3 +123,14 @@ Levers (implemented, measured, OFF by default; default generator unchanged): (a)
 Tests re-run on the new dataset: fuzz 200/200 (800 warps, 25,600 hashes, 0 mismatches, CPU interpreter 1.23 s), edge 14/14, determinism PASS (fingerprint 62a4f0eb018df273), memcheck PASS, stats PASS (3 seeds, no obvious bias). 3 warps x 3 seeds bit-exact in the bench run.
 CUDA: new pack proto-cuda/packs/igneum-genesis-mh (kernel.cu with cache-fill and build kernels, memhard.h shared by device and host, vectors incl. cache head/last/FNV and 64 sampled words). host.cu handles both modes; old packs unchanged (closed-form export re-run is byte-identical in kernel.cu and program.metal). clang emulation (emu/emu.sh igneum-genesis-mh): cache check PASS (all words, FNV == Mac), dataset self-test PASS at 1 GiB, 3/3 vectors standalone and 2/2 in batch at 2 warps/block. RTX 5090 and AMD runs of this pack PENDING; no NVIDIA figure for the memory-hard dataset exists.
 Not demonstrated: cross-vendor results for the new dataset; the shortcut ratio on a discrete GPU; time-memory trade-offs between the two measured points; cryptographic strength of the mixer and the chained cache; distinct-lines-per-hash census.
+
+## 2026-10-03  rusty-kaspa base build and 3-node devnet on the Mac (consensus-engineer, pre-fork proof)
+
+Machine: Apple M5 Max (18 CPU cores), 64 GB, macOS 26.6.2. Toolchain: Homebrew rust 1.69.0 was too old (repo needs 1.91.0), so rustup 1.29.1 was installed non-interactively and gives rustc 1.99.0 and cargo 1.99.0; protobuf 36.2 added via `brew install protobuf` (protoc was missing); Apple clang 14.0.3 already present. Nothing else was needed.
+Source: `vendor/rusty-kaspa` at commit `01b532e8b553523216471682649693af92f0fd16` (v2.1.0, 2026-09-22). `cargo build --release --bin kaspad`: 2 min 36 s cold, binary 35,405,104 bytes (34 MB), 131 compiler warnings, zero errors.
+Devnet: three `kaspad --devnet --nodnsseed --disable-upnp --enable-unsynced-mining --yes --loglevel=info` nodes, separate `--appdir`, P2P 16611/16621/16631, gRPC 16610/16620/16630, nodes 2 and 3 `--connect` to node 1 (node 3 to node 2 never came up because both started at once, so the topology was a star through node 1). Network params: 10 BPS (100 ms blocks), GHOSTDAG k 124, merge depth 36,000 blocks, finality depth 432,000, pruning depth 1,080,000, DAA window 661 samples x 40 blocks, genesis bits 0x1e21bc1c (about 248,663 hashes per block).
+Miner: kaspad ships none, so a 150-line CPU miner on `kaspa-pow::State` (real kHeavyHash, 16 threads, 300 ms template refresh) submitted to node 1 only: 27.2 MH/s sustained, 5,718 blocks in 180 s, 0 rejected.
+Blocks per second over the 180 s run: 31.76 on all three nodes (1,691 to 7,409 blocks each). Two phases: 56 to 62 blocks/s while difficulty sat at genesis (first 6,000 blocks, min window 150 samples), then the DAA raised difficulty to 1.12 M at block 6,018 and the rate fell to 14 to 15 blocks/s, still converging toward the 10 BPS target when the run ended.
+Propagation: block counts, DAA scores and sink hash were identical on all three nodes at 18 of 19 ten-second samples; the one miss was node 2 trailing by a single block for one sample. Tips stayed at 1 because a single serial miner never produced parallel blocks, so GHOSTDAG k was not exercised; a second miner is the next step for that.
+Earlier 30 s warm-up run: 1,690 blocks, 56.3 blocks/s on all three nodes, 28.1 MH/s.
+Fork points mapped with line numbers in `docs/fork-map.md` (hash, coinbase, DAA, header, depth constants, BPS and k). All nodes stopped at the end. Miner source kept outside the repo (scratchpad); re-create from `testing/integration/src/common/utils.rs:271` if needed.