---
path: /studio/yemaya/character-design-system
surface: studio
domain: yemaya
auth: signed-in + studio entitlement
source: apps/oshun/web/src/app/studio/yemaya/character-design-system/page.tsx
status: walked
last_walked:
  '2026-05-29 automated runtime walk (Playwright headless) — render, /v1 data
  (2xx), console/page-errors, expected content, screenshot verified; live
  screen-reader, touch, offline, and telemetry-delivery checks pending a manual
  AT pass. Evidence: WALKTHROUGH/results/runtime-sweep-2026-05-29.md; body
  re-derived 2026-06-03 from current source (lane-console architecture)'
---

# Studio · Yemaya · Character Design System

## Purpose

Admin lane console for canon-consistency checking. It wires the real
`@yemaya/canon-enforcement` engine via
`/v1/admin/yemaya/character-design-system`: supply a set of character/world canon
facts and detect contradictions — the same fact asserted at different canon
tiers, or the same subject given conflicting values.

## Entry points

- No breadcrumb panel on this page.
- Reachable from the Studio index and from the Storyboard Creation quick-action
  (which links here).
- Direct URL / bookmark (signed-in + studio entitlement).

## Layout regions

`page.tsx` renders `ShellLayout active="studio"` and:

- **Workspace panel** (`StudioYemayaCharacterDesignSystemWorkspace`,
  `data-yemaya-character-design-system-workspace`):
  - `<h1>` "Yemaya Character Design System Workspace" (`WorkspaceHeading`).
  - Summary paragraph (`data-yemaya-character-design-system-summary`).
  - The canon-check form lane (loading / unauthorized / error / ready-form /
    result, see States).
- **Route Map panel** (`data-yemaya-character-design-system-route-map`): `<h2>`
  "Route Map" + five `STUDIO_YEMAYA_CHARACTER_DESIGN_SYSTEM_ROUTE_MAP` entries.
- **Quick-action panel**: two `quickAction` links.

## States

- [ ] **Loading** — `data-yemaya-cds-loading` "Loading canon engine…" while the
      GET catalog fetch is in flight.
- [ ] **Unauthorized** — `data-yemaya-cds-unauthorized` "Access restricted." on a
      401/403 admin-scope failure (fail-closed).
- [ ] **Error** — `data-yemaya-cds-error` "Could not load the character design
      system." on a non-OK / malformed catalog response.
- [ ] **Ready-form** — `data-yemaya-cds-check-form` once the catalog
      (`canonTiers`) resolves.
- [ ] **Result** — `data-yemaya-cds-result` with `data-yemaya-cds-counts` and a
      `data-yemaya-cds-conflicts` list (or `data-yemaya-cds-clean` "Canon is
      internally consistent."); or a validation message
      `data-yemaya-cds-check-error`.

## Interactions

### Canon-check form (`data-yemaya-cds-check-form`)

- [ ] **Canon facts (JSON)** — `textarea` `data-yemaya-cds-field-entries`
      (aria-label "canon entries json"); must be a non-empty JSON array of
      `{ fact, tier, source? }`.
- [ ] **Submit** — `button` `data-yemaya-cds-check-submit` "Check canon
      consistency" → POST `/v1/admin/yemaya/character-design-system/check` with
      `{ entries }`.

### Route map

`data-yemaya-character-design-system-route-map` — five entries:

- [ ] `/studio/yemaya/character-design-system`
- [ ] `/studio/yemaya/character-design-system/characters/[characterId]`
- [ ] `/studio/yemaya/character-design-system/variants/[variantId]`
- [ ] `/studio/yemaya/character-design-system/revisions/[revisionId]`
- [ ] `/studio/yemaya/character-design-system/governance/[policyId]`

### Quick actions

- [ ] **"Open Yemaya Storyboard Creation workspace"** →
      `/studio/yemaya/storyboard-creation`.
- [ ] **"Back to Studio workspace index"** → `/studio`.

## Data & contracts

- **Reads**: GET `/v1/admin/yemaya/character-design-system` (catalog:
  `canonTiers`) on mount.
- **Writes**: POST `/v1/admin/yemaya/character-design-system/check`.
- **Realtime**: none.
- **Caching**: client fetch on mount, `cache: 'no-store'`,
  `buildBffAuthHeaders()`.
- **Auth/role check**: admin-scoped fail-closed (401/403 → unauthorized state)
  behind the proxy studio gate.

## Cross-references

- Studio overview: [`studio-overview.md`](../../studio-overview.md)
- Workspace source:
  `apps/oshun/web/src/components/studio/StudioYemayaCharacterDesignSystemWorkspace.tsx`
- Route map source:
  `apps/oshun/web/src/components/studio/StudioYemayaCharacterDesignSystemRouteMap.ts`
- Engine: `@yemaya/canon-enforcement`
- Sibling Yemaya bridges: see folder index
- Feature spec: [`V1/features.md`](../../../../V1/features.md)

## Open questions / known gaps

- [ ] The Route Map advertises characters / variants / revisions / governance
      sub-routes that the live canon-check lane does not expose.