## [0.6.3-alpha] — 2026-05-03
### Added
- AC offer-based Rust kernel (`/ferrite redstone ac-rust on`).
Mirrors AC's `powerNetwork()` loop in Rust: offer-based propagation
with flow-direction tracking, priority-queue ordered output.
Parity-clean (0 oracle mismatches sustained across Phase 3
validation). **~16% aggregate wire-cost reduction** vs the
existing relaxation kernel on heavy workloads.
### Notes
- Existing relaxation kernel (`RUST_BFS`) stays in tree as fallback.
Both kernels coexist; AC-Rust activates first when enabled, BFS
takes over if the AC path bails (overflow / native unavailable).
- Phase 3 depower fix: `runRustAcBatch()` now calls
`findPower(wire, true)` after `findExternalPower()` to pull
outside-cascade wire contributions before serializing. Fixes
boundary wire power=0 mismatches the oracle surfaced during
initial validation (~5% mismatch rate before fix, 0 after).
Developer information
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