soft3/hemera/CHANGELOG.md

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Changelog

[0.3.0] — 2026-05-12

Added

Async FSM verified streaming (stream_async) — O(log n) decoder for pre-order interleaved format

chunk_cv and parent_cv aliases for chaining value accessors

Sparse Merkle tree with 256-bit keys, depth-256, compressed proofs (bitmask encoding for sentinel siblings)

Batch Merkle proofs — deduplicated multi-leaf proofs with depth-first sibling ordering

GPU backend (cyber-hemera-wgsl) — wgpu compute shaders for batch_permute, hash_leaves, hash_nodes, root_hash, outboard; u64 emulated as vec2

Zero-alloc hot paths in the CPU sponge and tree builder

Changed

Canonical parameters corrected to spec: R_P=16, x⁻¹ partial S-box, 32-byte (4-element) output, ~736 STARK constraints, 24 total rounds

specs/ replaces reference/ as the directory for the full decision record

Polynomial nouns integrated throughout specs and docs

Fixed

README link [reference](/soft3/hemera/reference) updated to [specs](/soft3/hemera/specs)

[0.2.0]

Initial public release: Poseidon2 permutation over Goldilocks field (t=16, R_F=8, R_P=16), structured-capacity sponge, content tree (4 KB chunks, left-balanced Merkle), verified streaming, self-bootstrapped constants from seed b"cyber".

Homonyms

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