---
name: pikku-deploy-fastify
description: >-
  Use when deploying a Pikku app with Fastify. Covers PikkuFastifyServer standalone and
  pikkuFastifyPlugin for existing Fastify apps. TRIGGER when: code imports @pikku/fastify or
  @pikku/fastify-plugin, user mentions Fastify deployment, or start.ts creates a
  PikkuFastifyServer. DO NOT TRIGGER when: just defining functions/wirings without
  Fastify-specific code.
---

# Pikku Fastify Deployment

## Agent Operating Procedure

Use this skill as an execution checklist, not reference material.

1. Discover before editing. Prefer OpenCode tools such as `pikku-meta` when available; otherwise run the relevant `pikku meta ... --json` command and inspect only the focused output you need.
2. Identify the source files that own the behavior. Do not start by reading generated output, `.pikku`, `node_modules`, vendored packages, or broad build artifacts.
3. Make the smallest source change that satisfies the task. Keep generated files generated, and avoid hand-editing SDKs, schema output, or typegen.
4. Validate with the narrowest relevant command first, then run `pikku-verify` or `pikku all` when functions, wirings, schemas, or generated clients may have changed.
5. If validation fails, fix the source cause and rerun validation. Do not paper over generated errors by editing generated files.

## Standalone Server

```bash
yarn add @pikku/fastify
```

```typescript
import { PikkuFastifyServer } from '@pikku/fastify'
import './.pikku/pikku-bootstrap.gen.js'
import { createConfig, createSingletonServices } from './services.js'

const config = await createConfig()
const singletonServices = await createSingletonServices(config)

const appServer = new PikkuFastifyServer(
  { ...config, hostname: 'localhost', port: 4002 },
  singletonServices.logger
)
appServer.enableExitOnSigInt()
await appServer.init()
await appServer.start()
```

**Constructor:** `new PikkuFastifyServer(config, logger)`

**Config extends CoreConfig with:** `port`, `hostname`, `healthCheckPath?`

**Methods:** `init(httpOptions?)`, `start()`, `stop()`, `enableExitOnSigInt()`

**Property:** `app: FastifyInstance` — Direct access to Fastify instance.

## Plugin (existing Fastify app)

```bash
yarn add @pikku/fastify-plugin
```

```typescript
import Fastify from 'fastify'
import pikkuFastifyPlugin from '@pikku/fastify-plugin'
import './.pikku/pikku-bootstrap.gen.js'

const app = Fastify()
app.register(pikkuFastifyPlugin, {
  pikku: {
    logger: singletonServices.logger,
    logRoutes: true,
    loadSchemas: true,
  },
})
```