# HyperTwist Phase S4-A Preparation Packet

Date: `2026-05-29`

Packet: `Phase S4-A`

Title: `first-party extraction skills`

## Goal

Land the next bounded browser/docs/design skill seam by exposing first-party
structured extraction skills over authoritative HyperTwist docs and design-spec
source surfaces.

## Scope

- `skill/extract-docs`
- `skill/extract-design-spec`
- first-party extraction state over authoritative first-party docs/design
  source surfaces
- registry, control-state, audit-ledger, authoring-harness, sample-contract,
  and JSON support

## Required boundaries

- do not widen into browser diagnostics
- do not widen into design-to-native translation
- keep extraction structured, provenance-visible, derived-assistive, and
  first-party owned

## Inputs

- landed `S1-A` through `S3-C` skill substrate
- landed first-party architecture, roadmap, feature-registry, and provenance
  authority surfaces

## Acceptance gate

- extraction remains bounded to structured docs/design-spec output and does not
  claim browser tracing, API discovery, or design translation ownership
