---name: bklit-studiodescription: >---

Bklit Studio Skill (chart development)

Monorepo contributors only. Use this skill automatically whenever you build, edit, or prototype a chart — before shipping via bklit-ship.

Studio at /studio is the single development surface: full editor shell, component tree, properties, motion, codegen, and registry previews. Do not scaffold apps/web/app/playground/.

When to use (auto-trigger)

• Build, prototype, or edit a chart (new or existing)
• Tune props, layers, data, styling, or animation
• Mentions Studio, /studio, registry preview, or chart controls
• Work continues from a prior playground task → use Studio instead

Quick start

pnpm dev   # repo root

Open http://localhost:3000/studio (optional query: ?chart=line-chart).

Task	URL
Edit existing chart	/studio?chart=<slug> — slugs in packages/studio/src/chart-slugs.ts
Profit/loss line mode	/studio?chart=line-chart&lineChartMode=profitLoss

Editor layout

Region	Purpose
Left	Chart type (in full Studio), layer list, data controls, animation
Center	Canvas, rulers, resizable frame, replay/scramble
Right	Properties for the selected layer

Pane rules: animation → left (motionPanel on chart config); per-layer props → right; visibility → eye icon on layer (uses hiddenComponents in URL state).

Where to implement (existing charts)

Edit the chart in packages/studio and packages/ui — not apps/web/components/playground/.

Concern	Path
Chart preview + codegen	packages/studio/src/lib/registry.tsx (render, generateCode)
Layer tree (components panel)	packages/studio/src/lib/studio-components.ts (resolve*Components)
Control groups (properties)	packages/studio/src/lib/registry-control-groups.ts
URL / default state	packages/studio/src/lib/studio-parsers.ts
Chart UI	packages/ui/src/charts/
Slugs	packages/studio/src/chart-slugs.ts + studioRegistry in registry.tsx
Studio-only previews	packages/studio/src/components/charts/*-studio-preview.tsx

Patterns in registry.tsx render

Reuse committed helpers (do not reimplement):

• StudioChartShell + studioCartesianLegendItems — legend grid + showLegend
• StudioVisibleLayer + componentId — ties render to layer visibility (line.grid, line.series.0, …)
• getStudioCssRevealPropsForPreview — motion / reveal
• isStudioComponentVisible(state, componentId) — conditional children
• seriesStrokePropsFromState, fadeEdgesPropValue, chartTooltipPropsFromState

Reference implementation: lineConfig.render in registry.tsx.

New chart (not in registry yet)

1. Implement component(s) in packages/ui/src/charts/ (minimal API first).
2. Add slug to packages/studio/src/chart-slugs.ts.
3. Add StudioChartConfig to studioRegistry in registry.tsx:
   • render(state, ctx) — preview inside EditorChartFrame via StudioShell
   • resolveComponents in studio-components.ts
   • controlGroups / resolveControlGroups
   • generateCode for the code sheet
4. Open /studio?chart=<new-slug> and iterate.
5. When stable, follow bklit-ship for docs, gallery, shadcn registry.

Adding a prop or layer

1. Add key to StudioUrlState / defaultStudioState in studio-parsers.ts if missing.
2. Add control(s) on the right layer in registry-control-groups.ts or per-component controlGroups in studio-components.ts.
3. Wire prop in registry.tsx render (and in packages/ui chart code).
4. If the prop affects animation → ensure motionPanel: true on chart config.
5. Verify in Studio: layer list, visibility toggle, properties, replay.

Shipping

When the API is stable, read .agents/skills/bklit-ship/SKILL.md — prototype code should already live in packages/ui + packages/studio; no playground route to migrate.

Deprecated: /playground

The local /playground route and bklit-playground skill are deprecated. /playground redirects to /studio. Do not copy playground-editor-shell or apps/web/components/playground/ for new work.

File reference

Item	Path
Studio app route	apps/web/app/studio/page.tsx (StudioShell)
Studio package	packages/studio/
Studio skill	.agents/skills/bklit-studio/SKILL.md
Ship checklist	.agents/skills/bklit-ship/SKILL.md
Performance audit	.agents/skills/bklit-studio-chart-performance/SKILL.md