Hakozuna HZ5: A Page/Run-First Sidecar Allocator Prototype

This release contains the Hakozuna HZ5 sidecar allocator prototype source, design notes, and benchmark/reproducibility artifacts.

HZ5 explores a page/run-first allocator design next to the existing HZ3 and HZ4 profiles. It focuses on low-RSS behavior, fail-closed ownership, descriptor-owned front-ends, page-oriented remote free, and profile-specific Linux allocator lanes.

Main components include:

• hakozuna-hz5/: HZ5 sidecar allocator source
• api/: public HZ5 allocator API
• contract/: SpeedLane descriptor ABI and purity contract
• policy/: HZ5-native allocation/free dispatch policy
• lowpage/, midpagefront/, and largefront/: experimental page/run front-ends
• Linux benchmark scripts and profile matrices

Code repository: https://github.com/hakorune/hakozuna

This HZ5 record is separate from the HZ3/HZ4 ACE-Alloc artifact series and is intended as an experimental sidecar allocator prototype release.