AGENTS.md — Cotizador E3

Quick Reference

Command	Purpose
`npm run dev`	Start Next.js dev server on port 3000
`npm run build`	Production build (runs TypeScript check)
`npm run lint`	ESLint (flat config, eslint-config-next)
`npx tsx prisma/seed.ts`	Run seed (upserts all data, idempotent)
`npx prisma migrate dev`	Create/apply migration
`npx prisma generate`	Regenerate Prisma client
`npx prisma studio`	Prisma Studio GUI

Windows environment. Use start.bat / stop.bat to manage Docker PostgreSQL + Next.js together. PowerShell is the shell. Paths with brackets (e.g. [id]) require -LiteralPath in PowerShell, not -Path.

Two backends, one database. The Next.js app (src/, port 3000) and a standalone Python FastAPI service (api/, port 8000) both talk to the same PostgreSQL DB. Prisma owns the schema/migrations; the Python API reads/writes the same tables independently. docker-compose.yml runs postgres + the api service; Next.js is run separately via npm run dev / start.bat.

Prisma 7 — Critical Gotchas

Prisma client is NOT at @prisma/client. It's generated to src/generated/prisma/ and imported as @/generated/prisma/client.
Uses PrismaPg driver adapter (from @prisma/adapter-pg) with individual connection params (host/port/user/password/database), NOT a connection string. The connectionString approach causes SCRAM auth errors with postgres:postgres.
prisma.config.ts has no seed property (unsupported by PrismaConfig type). Run seed manually with npx tsx prisma/seed.ts.
After changing schema.prisma: run npx prisma migrate dev, then npx prisma generate.
The globalForPrisma singleton pattern in src/lib/db.ts prevents hot-reload connection leaks in dev.

PDFKit — Server-Side PDF

pdfkit is excluded from Next.js bundling via serverExternalPackages in next.config.ts. Without this, font metric files (.afm) can't be resolved at runtime.
Footer auto-page-break bug: doc.text() at y > page.height - margins.bottom triggers pdfkit's automatic page addition. To write footers in the bottom margin, temporarily set doc.page.margins.bottom = 0, write, then restore. Use bufferPages: true + switchToPage() to add footers after all content.
Returns Promise<Buffer> — convert to Uint8Array for NextResponse body.

Next.js 16 Conventions

Async params: Dynamic route params are Promise<{ id: string }> — must await params before use.
All pages are force-dynamic — no static generation or ISR.
Tailwind CSS v4 — no tailwind.config.* file. Config is in postcss.config.mjs (using @tailwindcss/postcss) and CSS custom properties via @theme inline in src/app/globals.css.

Data Model Notes

Configuracion is a key-value store (clave/valor), not a traditional settings model. New config keys: color_primario, color_secundario, logo_base64 (branding for PDF export).
Cascading deletes: Cotizacion → ServicioCotizado, PlanBucefaloCotizacion use onDelete: Cascade.
Cotización number format: UJ{YY}{MM}{AsesorInitials}{seq} (e.g. UJ2605AG001) — see generarNumeroCotizacion in src/lib/calculators.ts. Sequence is 3 digits, zero-padded.
Vigencia = 15 business days from fecha (excludes Sat/Sun) — calcularVigencia.
IVA_RATE = 0.16 (16%).
Bucéfalo CRM plan prices (in calculators.ts, NOT the DB): basico=$1,000, estandar=$3,500, premium=$4,500, empresarial=$7,500 (monthly).
Financing lives in the FinanciamientoPlan table (3/6/9/12 months). Formula: comisionTotal = monto × comision%, pagoMensual = (monto + comisionTotal) × (1 + tasa) / meses, then add 16% IVA. Both backends must keep this formula identical.

Architecture

src/
  app/           # Next.js App Router pages + API routes
    api/         # Route handlers (REST endpoints)
    cotizaciones/[id]/editar/  # Edit mode (reuses CotizacionEditor via EditorLoader)
  components/    # Shared client components (ExportButtons, Sidebar)
  lib/           # Utilities: db.ts, store.ts, calculators.ts, pdf-generator.ts
  generated/prisma/  # Prisma client output (gitignored)
prisma/
  schema.prisma  # 8 models
  seed.ts        # All catalog data (23 services, bonos, planes, config)
  migrations/    # Prisma migration files

Zustand store (src/lib/store.ts) manages cotización editor state (draft form). Used by both new and edit pages.
ExportButtons.tsx has 4 variants: ExportExcelButtonSaved / ExportPDFButtonSaved (GET by ID) and ExportExcelButtonDraft / ExportPDFButtonDraft (POST with body).
The old standalone ExportExcelButton.tsx was deleted — all exports now go through ExportButtons.tsx.

Domain

Quotation system for Consultoría E3 (digital marketing agency in Querétaro, MX). Services organized in 4 phases: Fase 0 (Auditorías), Fase 1 (Setup/Infra), Fase 2 (Publicidad/Manejo), Fase 3 (Contenido/SEO). Two payment types: unico (one-time) and mensual (recurring). Optional Bucéfalo CRM plans and Openpay financing.

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