# HyperTwist Phase S1-D first-party skill authoring, examples, and validation harness implementation packet

Created on `2026-05-28`

## Status

- first-party HyperTwist packet
- bounded `Phase S1-D` implementation slice

## Purpose

This packet lands the bounded first-party skill authoring, examples, and
validation-harness seam under the canonical `Skillization And Command Surface`
doctrine.

The landed slice is:

- first-party skill authoring template
- registry-grounded examples
- per-skill smoke/eval validation harness

It is not:

- permissive analyzer wrappers
- restrictive clean-room command-contract specs
- wrapper execution or donor command promotion

## Current authority basis

This implementation packet stands on:

- `docs/ops/HYPERTWIST_SKILLIZATION_AND_COMMAND_SURFACE_DOCTRINE_2026-05-21.md`
- `docs/ops/HYPERTWIST_OPTIONAL_ASSISTIVE_FEATURE_DEACTIVATION_AND_REMOVABILITY_DOCTRINE_2026-05-21.md`
- `docs/ops/HYPERTWIST_IMPLEMENTATION_PHASE_1_KICKOFF.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/ARCHITECTURE.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/FEATURE_REGISTRY.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/SKILLS.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/PROVENANCE_AND_TRUST_MODEL.md`
- `docs/arch/HYPERTWIST_PHASES1_D_FIRST_PARTY_SKILL_AUTHORING_EXAMPLES_AND_VALIDATION_HARNESS_PREPARATION_PACKET_2026-05-28.md`

The preserved owners do not change:

- first-party HyperTwist remains the owner of the product command surface
- the landed `Phase S1-A`, `Phase S1-B`, and `Phase S1-C` seams remain the
  current authoritative substrate beneath this packet
- optional assistive skills remain product-owned adjunct declarations rather
  than donor command truth

## Landed scope

The current code now owns a bounded first-party authoring-harness seam through:

- canonical authoring-template field, section, example, validation-contract,
  and aggregate harness types in:
  - `HyperTwistSkillTypes.h`
- first-party authoring-harness derivation over the landed `S1-A` registry,
  `S1-B` control-state, and `S1-C` audit-ledger seams in:
  - `UHyperTwistSkillCoreLibrary`
- current bounded harness coverage for:
  - reusable skill authoring-template sections
  - registry-grounded per-skill examples
  - per-skill smoke/eval validation-contract cases
  - live, declaration-only, deferred-wrapper, deferred-clean-room, and
    placeholder validation modes
  - structural-addition guard state proving new skills can be added without
    inventing fresh format
- sample contract helpers in:
  - `UHyperTwistContractLibrary::MakeSampleSkillAuthoringHarnessState()`
  - `UHyperTwistContractLibrary::SerializeSkillAuthoringHarnessStateToJson(...)`
  - `UHyperTwistContractLibrary::DeserializeSkillAuthoringHarnessStateFromJson(...)`
- focused automation coverage in:
  - `HyperTwistSkillPhaseS1DAuthoringValidationHarnessContractTest.cpp`

## Why this is still intentionally bounded

This packet lands authoring-template, examples, and validation-harness
contracts only.

Still deferred:

- permissive analyzer wrappers
- restrictive clean-room command-contract specs

## Validation

Build validation:

- `UnrealHyperTwistEditor Win64 Development`

Focused automation validation:

- `HyperTwist.FirstParty.Skill.PhaseS1D.AuthoringTemplate`
- `HyperTwist.FirstParty.Skill.PhaseS1D.ValidationHarnessCoverage`
- `HyperTwist.FirstParty.Skill.PhaseS1D.SerializationRoundTrip`

Observed:

- `3` focused `Phase S1-D` automation tests succeeded

## Queue effect

This packet consumes the current `Phase S1-D` implementation slice.

After this landing:

- `S1-D` is landed in current code
- `S2-A` is the next clean skillization move
- do not jump straight from `S1-D` to restrictive command specs
