---
path: /studio/yemaya/pipeline-step-types
surface: studio
domain: yemaya
auth: signed-in + studio entitlement
source: apps/oshun/web/src/app/studio/yemaya/pipeline-step-types/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 · Pipeline Step Types

## Purpose

Admin lane console wired to the `@yemaya/orchestration` DAG analyzers: browse
the production step-type catalog and validate a pipeline step graph — detect
dependency cycles and compute the parallel execution waves (topological levels)
the orchestrator would run.

## Entry points

- Studio index quick-actions.
- No breadcrumb panel on this page.
- This page links out to `/studio/yemaya/cross-domain-integration`; reachable
  inbound from `/studio/yemaya/external-tool-integrations`.
- Direct URL / bookmark (signed-in + studio entitlement).

## Layout regions

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

- **Workspace panel** (`StudioYemayaPipelineStepTypesWorkspace`,
  `data-yemaya-pipeline-step-types-workspace`):
  - `<h1>` "Yemaya Pipeline Step Types Workspace".
  - Summary `<p data-yemaya-pipeline-step-types-summary>` (browse catalog +
    validate step graph for cycles and parallel waves).
  - **Analyze lane** — loading / unauthorized / error / ready-form / result;
    `data-yemaya-pst-catalog` lists the step types.
- **Route Map panel** (`data-yemaya-pipeline-step-types-route-map`): `<h2>` "Route
  Map" with five entries.
- **Quick-action panel**: two `quickAction` links.

## States

- [ ] **Loading** — `data-yemaya-pst-loading` ("Loading step-type catalog…").
- [ ] **Unauthorized** — 401/403 → `data-yemaya-pst-unauthorized` with reason
      "Yemaya workspace scope required to view pipeline step types.".
- [ ] **Error** — non-OK / malformed catalog → `data-yemaya-pst-error`.
- [ ] **Ready-form** — catalog (`stepTypes`) loaded; the analyze form renders.
- [ ] **Result** — 200 → `data-yemaya-pst-result` with `data-yemaya-pst-cycle`
      (node count + acyclic/cycle), and when acyclic `data-yemaya-pst-waves` (each
      `data-yemaya-pst-wave`).
- [ ] **Validation error** — invalid JSON, empty/non-array graph, or a non-200
      POST → `data-yemaya-pst-analyze-error`.

## Interactions

### Analyze lane

`<form data-yemaya-pst-analyze-form>`:

- [ ] **Step graph (JSON)** — `<textarea data-yemaya-pst-field-nodes>` (aria-label
      "step graph json"), seeded with a diamond DAG `[{ id, dependsOn[] }]`.
- [ ] **"Analyze step graph"** submit (`data-yemaya-pst-analyze-submit`) — POSTs `{
      nodes }`.

### Route map

`data-yemaya-pipeline-step-types-route-map` — five entries:

- [ ] `/studio/yemaya/pipeline-step-types`
- [ ] `/studio/yemaya/pipeline-step-types/scenes/[sceneId]`
- [ ] `/studio/yemaya/pipeline-step-types/exports/[exportId]`
- [ ] `/studio/yemaya/pipeline-step-types/revisions/[revisionId]`
- [ ] `/studio/yemaya/pipeline-step-types/governance/[policyId]`

### Quick actions

- [ ] **"Open Yemaya Cross-Domain Integration workspace"** →
      `/studio/yemaya/cross-domain-integration`.
- [ ] **"Back to Studio workspace index"** → `/studio`.

## Data & contracts

- **Reads**: `GET /v1/admin/yemaya/pipeline-step-types` (catalog; `stepTypes`) on
  mount with `buildBffAuthHeaders()`, `cache: 'no-store'`.
- **Writes**: `POST /v1/admin/yemaya/pipeline-step-types/analyze` → `{ analysis: {
  nodeCount, hasCycle, cycles[], parallelGroups[] } }`.
- **Realtime**: None.
- **Caching**: client `fetch` on mount, no-store; aborted on unmount.
- **Auth/role check**: admin-scoped, fail-closed; route additionally signed-in +
  studio via the proxy gate.

## Cross-references

- Workspace source:
  `apps/oshun/web/src/components/studio/StudioYemayaPipelineStepTypesWorkspace.tsx`
- Route map source:
  `apps/oshun/web/src/components/studio/StudioYemayaPipelineStepTypesRouteMap.ts`
- Page source: `apps/oshun/web/src/app/studio/yemaya/pipeline-step-types/page.tsx`
- Sibling: [`studio-yemaya-external-tool-integrations.md`](./studio-yemaya-external-tool-integrations.md)
- Studio overview: [`studio-overview.md`](../../studio-overview.md)
- Feature spec: [`V1/features.md`](../../../../V1/features.md)

## Open questions / known gaps

- [ ] Step graph is entered as raw JSON; verify whether a visual DAG editor is
      planned.
- [ ] Route-map children (`scenes`/`exports`/`revisions`/`governance`) are a
      sitemap contract; confirm which dynamic pages exist.