Studio Aja · Fitness Pipeline

Purpose#

Admin lane console for exercise-motion smoothness analysis. Its operations lane wires @aja/motion-quality analyzeSmoothness via /v1/admin/aja/fitness-pipeline: score each joint by the magnitude of its jerk (third derivative; lower is smoother) and flag the frames whose jerk exceeds a threshold as discontinuities, returning the smoothness score, average/peak jerk, per-joint scores, and discontinuity frames. A preserved Metis embodied-instruction panel bridges the fitness domain into structured learning.

Entry points#

• Direct URL / bookmark — /studio/aja/fitness-pipeline; metadata sets alternates.canonical.
• Linked from /studio Domain-bridge studios section (Aja sub-area).
• Quick action — "Open Aja Yoga Pipeline workspace" (/studio/aja/yoga-pipeline).

Layout regions#

page.tsx renders inside <ShellLayout active="studio">:

• Workspace StudioAjaFitnessPipelineWorkspace — <h1> "Aja Fitness Pipeline Workspace" + summary (data-aja-fitness-pipeline-summary), the Metis panel (data-aja-fitness-pipeline-metis-panel, domain="fitness"), then the Smoothness Operations Lane (data-aja-fitness-pipeline-operations-lane).
• Route Map panel (data-aja-fitness-pipeline-route-map, <h2>) — 5 entries from STUDIO_AJA_FITNESS_PIPELINE_ROUTE_MAP exposed with data-aja-fitness-pipeline-route-map-entry / data-route-path.
• Quick-action lane (data-aja-fitness-pipeline-quick-actions) — two Link.quickAction anchors: yoga-pipeline and /studio.

States#

The lane fetches GET /v1/admin/aja/fitness-pipeline on mount.

• Loading — data-aja-fp-loading "Loading smoothness analyzer...".
• Unauthorized (gated) — data-aja-fp-unauthorized on 401/403; admin scope message ("Aja workspace scope required to analyze movement smoothness.").
• Error — data-aja-fp-error on non-OK / malformed / network failure.
• Ready (form) — data-aja-fp-form, catalog attributes (data-aja-fp-analyzer, default jerk threshold, report count and data-aja-fp-report spans), and idle submit state.
• Result — data-aja-fp-result with stable score / average-jerk / peak-jerk / discontinuity-count attributes, data-aja-fp-headline, data-aja-fp-jerk, data-aja-fp-discontinuities / data-aja-fp-clean, and typed data-aja-fp-joint-row attributes.
• Validation error — data-aja-fp-analyze-error (e.g. "Provide at least one joint id." / "Jerk threshold must be a positive number.").
• Mobile/touch containment — form controls and route actions remain at least 44 px tall with no horizontal overflow.
• Empty — N/A; catalog + Metis panel are constant.

Interactions#

Smoothness form (data-aja-fp-form)#

• Joint ids — input data-aja-fp-joints (default j); comma-separated, at least one.
• Frames — textarea data-aja-fp-frames; JSON array of { positions: { jointId: { x, y, z } } }, at least 4 frames.
• Jerk threshold — input data-aja-fp-threshold; positive number.
• Analyze smoothness — submit data-aja-fp-submit; fires POST /v1/admin/aja/fitness-pipeline/analyze with { joints, frames, jerkThreshold }; locked with data-aja-fp-submit-state="analyzing" while the real request is pending.

Metis embodied-instruction panel#

• Relationship cards (data-aja-fitness-pipeline-metis-summary + data-aja-fitness-pipeline-metis-card) — links bridge the fitness domain into Metis study moments and expose stable hrefs.

Route Map panel#

• 5 entries — non-interactive listing with exact path ordering.

Quick-action lane#

• "Open Aja Yoga Pipeline workspace" → /studio/aja/yoga-pipeline
• "Back to Studio workspace index" → /studio

Data & contracts#

• Reads: GET /v1/admin/aja/fitness-pipeline (catalog: analyzer, summary, defaultJerkThreshold, reports) on mount, cache: 'no-store', buildBffAuthHeaders(); client fails closed unless the expected smoothness analyzer and all five report keys are present.
• Writes: POST /v1/admin/aja/fitness-pipeline/analyze → { score, averageJerk, peakJerk, perJointScores, discontinuityFrames }; client fails closed unless the result, per-joint scores, and discontinuity frame list have the expected typed fields.
• Realtime: none.
• Caching: client fetch on mount (no-store); SSR shell.
• Auth/role check: BFF endpoints admin-scoped, fail-closed (401/403 → unauthorized render); route gated signed-in + studio via the proxy.

Cross-references#

• Parent: ../../studio-overview.md
• Sibling routes: ./studio-aja-yoga-pipeline.md
• Component sources:
  • apps/oshun/web/src/components/studio/StudioAjaFitnessPipelineWorkspace.tsx
  • apps/oshun/web/src/components/studio/StudioAjaFitnessPipelineRouteMap.ts
  • apps/oshun/web/src/components/studio/StudioAjaMetisEmbodiedInstructionPanel.tsx

Verification evidence#

• apps/oshun/web/e2e/studio-aja-fitness-pipeline.spec.ts runs against the real Next Studio shell and local BFF, forwarding browser bearer auth rather than mocking the smoothness contract.
• The spec covers anonymous redirect, Aja-admin catalog load, exact default jerky j motion, edited clean constant-velocity motion, local validation with no POST, BFF validation details, malformed result, transport failure, loading / 503 / malformed / non-admin states, pending form locking, Metis bridge links, mobile no-overflow + 44px controls, scoped axe, and direct BFF 401/403/400/200 gates.

Open questions / known gaps#

• Route Map lists scenes/exports/revisions/governance child routes that are not yet implemented as pages.