# HyperTwist Phase J-B regression snapshots and cross-run benchmark deltas preparation packet

## Goal

Extend the first-party validation lane with bounded regression-snapshot and
 cross-run delta posture above the landed `Phase J-A` foundation.

## Scope

- regression-snapshot contract
- cross-run benchmark-delta boundary

## Non-goals

- generic experiment trackers
- artifact warehouses
- public benchmark ladders
- automated release promotion authority

## Planned code surfaces

- extend the validation/benchmark reference bundle with snapshot and delta
  contracts
- expose runtime accessors for the new bounded surfaces
- add focused automation proving the regression and delta contracts resolve
  with stable ids and preserved guards

## Canon sync

- `docs/v6_5_deep_manual_pack/HyperTwist/ROADMAP.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/ARCHITECTURE.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/FEATURE_REGISTRY.md`
- `docs/ops/HYPERTWIST_IMPLEMENTATION_PHASE_1_KICKOFF.md`
- `docs/REPO_LICENSE_TRACKING.md`
