# HyperTwist Phase S4-C Preparation Packet

Date: `2026-05-29`

Packet: `Phase S4-C`

Title: `first-party design shell skills`

## Goal

Land the next bounded browser/docs/design skill seam by exposing first-party
design-shell translation skills over authoritative HyperTwist docs, design,
browser, and packet source surfaces.

## Scope

- `skill/translate-design-shell`
- `skill/translate-design-interaction`
- first-party design-shell translation state over authoritative first-party
  docs, design, browser, and packet source surfaces
- registry, control-state, audit-ledger, authoring-harness, sample-contract,
  and JSON support

## Required boundaries

- do not widen into generic browser-shell orchestration
- do not widen into broad workflow/review chaining
- keep design-shell translation provenance-visible, bounded, derived-assistive,
  and first-party owned

## Inputs

- landed `S1-A` through `S4-B` skill substrate
- landed first-party architecture, roadmap, feature-registry, and provenance
  authority surfaces

## Acceptance gate

- design-shell translation remains bounded to native-shell and
  interaction-contract translation output and does not claim generic browser
  shell, workflow, or review ownership
