# YSD-0120 — Ownership ADR: Yemaya / Nisaba / Sophia / domain lens owners

- **Status:** approved (2026-07-18)
- **Priority:** P0 EXT — blocking (production rollout gated via YSD-0139)
- **Decision owner:** @GreyChimp
- **Drafted:** 2026-07-18 by Claude Code (claude-fable-5)
- **Approval:** approved as recommended by @GreyChimp on 2026-07-18; outcome
  recorded in decision-log.json; review by 2027-07-18

## Question

Who owns the Study & Deconstruction Workspace experience, study substrate,
evidence substrate, and analysis lenses?

## Recommendation

Adopt proposal §3.1 verbatim: Yemaya owns the creator-facing experience and
project transfer; Nisaba owns durable study/notebook semantics; Sophia owns
evidence anchors, provenance, and confidence-bearing claims; each analysis lens
stays with its accountable domain (Hathor, Aja, Euterpe, Aglaea,
Bellona+runtimes, Metis, Isis, Oshun, Iris, Neith/Maya per §3.2).

## Options considered

- Hathor as sole owner — rejected by the proposal: overfits narrative/game
  design, leaves camera/motion/sound/costume/learning under-composed.
- New standalone domain — rejected: duplicates Studio shell, Library, and
  notebook infrastructure Oshun/Nisaba already own.

## Consequences

- YSD-0121 encodes the boundaries in Nx tags, dependency constraints,
  CODEOWNERS, and architecture tests.
- The §3.2 responsibility matrix becomes the adapter map for Sections 0.3 and 6.

## Machine-enforced outcome (once approved)

Nx tag/dependency constraints + architecture tests (YSD-0121, YSD-0164) reject
cross-boundary imports.