Portability

Rule

Templates use one PostgreSQL schema and query contract. Local PGlite and hosted PostgreSQL share the same SQL semantics.

Database

Use Drizzle's PostgreSQL exports directly for schemas and its query builder for reads/writes:

import { sql } from "drizzle-orm";
import {
  boolean,
  doublePrecision,
  integer,
  pgTable,
  text,
} from "drizzle-orm/pg-core";

export const meals = pgTable("meals", {
  id: text("id").primaryKey(),
  name: text("name").notNull(),
  calories: integer("calories").notNull(),
  weight: doublePrecision("weight"),
  archived: boolean("archived").notNull().default(false),
  createdAt: text("created_at").notNull().default(sql`now()`),
});

Export	Purpose
pgTable	Defines a PostgreSQL table
text	Defines a text column, with optional enum values
integer	Defines an integer column
boolean	Defines a boolean column
doublePrecision	Defines a double-precision column
sql	Builds SQL expressions such as now()

Use @agent-native/core/db/schema only for framework-owned sharing helpers such as ownableColumns() and createSharesTable().

Use Drizzle's PostgreSQL query builder for app code:

import { and, desc, eq } from "drizzle-orm";

const rows = await db
  .select()
  .from(meals)
  .where(and(eq(meals.ownerEmail, userEmail), eq(meals.archived, false)))
  .orderBy(desc(meals.createdAt));

Avoid db.execute(...), getDbExec(), and handwritten SQL in actions, handlers, and stores when Drizzle can express the query. Raw SQL should be limited to additive migrations, health checks, carefully reviewed advanced queries, or one-off maintenance scripts. For timestamps in Drizzle schemas, use .default(now()); for migration SQL, use runMigrations().

Raw SQL helpers

• getDbExec() — executes parameterized PostgreSQL SQL
• Use PostgreSQL types such as BIGINT directly in raw SQL.

Never

When writing docs, say "PostgreSQL" or "PGlite" precisely.

Use Postgres syntax deliberately in advanced queries and migrations, and prefer Drizzle APIs or framework helpers for ordinary application code.

When giving deployment guidance, be precise about durability: local PGlite is for development, while shared and production environments need a persistent hosted PostgreSQL DATABASE_URL.

Hosting Agnostic

The server runs on Nitro with H3 as the HTTP framework. Templates must be deployable to any Nitro-supported target.

Never use Express

All server code uses H3/Nitro: defineEventHandler, readBody, getMethod, setResponseHeader, etc. Express is not a dependency. If you see Express types or patterns anywhere, replace them with H3 equivalents.

No platform-specific config in scaffolded template source

Files like netlify.toml, wrangler.toml, vercel.json, and netlify/functions/ must NOT appear in the CLI scaffold source (packages/core/src/templates/) — apps generated for users stay hosting-agnostic, with platform configuration living in CI/hosting dashboards.

This monorepo's own first-party deployed apps keep platform configuration in app-specific hosting manifests such as templates/*/netlify.toml; this rule only applies to the CLI scaffold source.

No Node APIs in server routes/plugins

Never use fs, child_process, or path in server routes and plugins. Use Nitro abstractions. (Actions in actions/ run in Node.js and can use Node APIs freely.)

No persistent-process assumptions

Never assume a persistent server process. Use the SQL database for all state.

Related Skills

• storing-data — Schema patterns and the core SQL stores
• server-plugins — Framework routes and H3 handler patterns
• security — SQL injection prevention via parameterized queries