# HyperTwist Phase S5-B Implementation Packet

Date: `2026-05-31`

Packet: `Phase S5-B`

Title: `first-party implementation-review and delegation specs`

## Outcome

Implemented now.

## Landed scope

- live `skill/review-implementation`
- live `skill/specify-bounded-delegation`
- bounded first-party implementation/delegation spec state over authoritative
  workflow/review, design-shell, and packet source surfaces
- registry, control-state, audit-ledger, authoring-harness, sample-contract,
  and JSON round-trip support

## Preserved boundaries

- implementation/delegation specs remain provenance-visible and bounded
- workflow/review and design-shell remain separate prerequisite seams
- no `S5-C` plan synthesis or orchestration widening in this packet
- no broader provider or domain skill widening in this packet

## Validation

- build target: `UnrealHyperTwistEditor Win64 Development`
- focused `S5-B` automation covers implementation/delegation coverage,
  bounded delegation safety, and serialization round-trip
- `S5-A` regression and `Phase S1` skill substrate regression were updated to
  include the new family
- Unreal build/editor automation remains deferred in the current VPS-only lane
  because `UnrealEditor` is not installed on this host
