feat: add bun-fullstack agent and update skills

.agent/skills/tech-stack/elysiajs/integrations/prisma.md

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+
+# Prisma Integration
+Elysia + Prisma integration guide
+
+## What It Is
+Type-safe ORM. Generate Elysia validation models from Prisma schema via `prismabox`.
+
+## Flow
+```
+Prisma → prismabox → Elysia validation → OpenAPI + Eden Treaty
+```
+
+## Installation
+```bash
+bun add @prisma/client prismabox && \
+bun add -d prisma
+```
+
+## Prisma Schema
+Add `prismabox` generator:
+```prisma
+// prisma/schema.prisma
+generator client {
+  provider = "prisma-client"
+  output   = "../generated/prisma"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+generator prismabox {
+  provider = "prismabox"
+  typeboxImportDependencyName = "elysia"
+  typeboxImportVariableName = "t"
+  inputModel = true
+  output   = "../generated/prismabox"
+}
+
+model User {
+  id    String  @id @default(cuid())
+  email String  @unique
+  name  String?
+  posts Post[]
+}
+
+model Post {
+  id        String  @id @default(cuid())
+  title     String
+  content   String?
+  published Boolean @default(false)
+  author    User    @relation(fields: [authorId], references: [id])
+  authorId  String
+}
+```
+
+Generates:
+- `User` → `generated/prismabox/User.ts`
+- `Post` → `generated/prismabox/Post.ts`
+
+## Using Generated Models
+```typescript
+// src/index.ts
+import { Elysia, t } from 'elysia'
+import { PrismaClient } from '../generated/prisma'
+import { UserPlain, UserPlainInputCreate } from '../generated/prismabox/User'
+
+const prisma = new PrismaClient()
+
+new Elysia()
+  .put('/', async ({ body }) =>
+    prisma.user.create({ data: body }), {
+      body: UserPlainInputCreate,
+      response: UserPlain
+    }
+  )
+  .get('/id/:id', async ({ params: { id }, status }) => {
+    const user = await prisma.user.findUnique({ where: { id } })
+    
+    if (!user) return status(404, 'User not found')
+    
+    return user
+  }, {
+    response: {
+      200: UserPlain,
+      404: t.String()
+    }
+  })
+  .listen(3000)
+```
+
+Reuses DB schema in Elysia validation models.