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Update PolicyEngine interactive tools to Next.js 16 #157

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10 changes: 6 additions & 4 deletions skills/tools-and-apis/policyengine-interactive-tools-skill/SKILL.md
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Expand Up @@ -18,18 +18,20 @@ How to build standalone React apps (calculators, dashboards, visualizations) tha

## Stack

**Next.js 14 + Tailwind 4 + Recharts** for all tools (embeddable and standalone).
**Next.js 16 + Tailwind 4 + Recharts** for all tools (embeddable and standalone).

| Component | Choice |
|-----------|--------|
| Framework | Next.js 14 (App Router) |
| Framework | Next.js 16 (App Router) |
| CSS | Tailwind 4 with `@policyengine/ui-kit` theme |
| Charts | Recharts |
| Code highlighting | Prism React Renderer |
| Testing | Vitest |
| Deploy | Vercel under `policy-engine` scope |
| Package manager | `bun` (not npm) |

**IMPORTANT:** All PolicyEngine tools use Next.js, not Vite. If you encounter a Vite-based tool, it should be migrated to Next.js 16 with the App Router. Vite was used in earlier prototypes but is no longer the standard.

**Requirements:**
- `@policyengine/ui-kit` theme (installed via `bun add @policyengine/ui-kit`)
- Inter font via Google Fonts CDN
Expand Down Expand Up @@ -445,7 +447,7 @@ For analysis repos that precompute data with Python microsimulation pipelines:
## Scaffolding a new tool

```bash
bunx create-next-app@14 my-tool --js --app --tailwind --eslint --no-src-dir --import-alias "@/*"
bunx create-next-app@latest my-tool --js --app --tailwind --eslint --no-src-dir --import-alias "@/*"
cd my-tool
bun add @policyengine/ui-kit recharts
bun add -D vitest
Expand Down Expand Up @@ -690,7 +692,7 @@ Test API responses against Python fixtures for numerical accuracy. See `PolicyEn

## Checklist for new tools

- [ ] Next.js 14 + Tailwind 4 scaffold
- [ ] Next.js 16 + Tailwind 4 scaffold
- [ ] `@policyengine/ui-kit` installed (`bun add @policyengine/ui-kit`)
- [ ] `@import "@policyengine/ui-kit/theme.css"` in `globals.css`
- [ ] Inter font loaded via Google Fonts CDN
Expand Down