Deployment Skill

Guide Claude through building and deploying Kagaribi packages to production environments.

Build Process

bash

npx kagaribi build [--env environment]

Examples:

bash

npx kagaribi build                    # Default environment
npx kagaribi build --env production   # Production environment
npx kagaribi build --env staging      # Staging environment

Output:

code

dist/
  root/
    index.js          # Bundled application
    wrangler.toml     # (Cloudflare Workers only)
    Dockerfile        # (Google Cloud Run only)
  users/
    index.js
    ...

Deployment Model

Kagaribi's deployment model enables independent deployment per package.

Independent Package Deployment

Each package can be deployed individually to different FaaS platforms:

•users → Cloudflare Workers (fast edge response)
•payments → AWS Lambda (integration with existing AWS infrastructure)
•analytics → Google Cloud Run (suitable for batch processing)
•notifications → Deno Deploy (lightweight notification processing)

Only Root Package Knows Deployment Locations

Critical design principle:

•Packages don't know where they are deployed
•Packages don't know where other packages are deployed
•Only root package references url field in kagaribi.config.ts and connects to appropriate URLs

Why this design?

•Package independence: Package code doesn't depend on deployment destination
•Flexibility: Changing deployment destination doesn't require changing package code
•Environment switching: Can use different deployment destinations for dev/staging/production

Automatic RPC Communication Switching

getClient<T>() automatically switches communication method based on deployment configuration:

•
Co-location (same process)
- •Direct function calls
- •No HTTP requests
- •Low latency
•
Distributed deployment (different FaaS)
- •HTTP RPC communication
- •Uses url from kagaribi.config.ts
- •Package code requires no changes

Packages don't need to be aware of communication method.

DB Connection Model

Each package establishes its own DB connection.

Co-location (Same Process)

Root package executes initDb(), and all packages use same DB connection via getDb():

typescript

// packages/root/src/index.ts
import { createDbMiddleware } from '@kagaribi/core';
import { initDb } from '../../../db/index.js';

const app = new Hono()
  .use('*', createDbMiddleware({ initFn: initDb }));

Other packages simply call getDb():

typescript

// packages/users/src/index.ts
import { getDb, schema } from '../../../db/index.js';

app.get('/api/users', async (c) => {
  const db = getDb();  // Use connection initialized by root
  const users = await db.select().from(schema.users);
  return c.json(users);
});

Distributed Deployment (Different FaaS)

Each package independently establishes DB connection using createDbMiddleware():

typescript

// packages/users/src/index.ts (deployed to Cloudflare Workers)
import { createDbMiddleware } from '@kagaribi/core';
import { initDb, getDb, schema } from '../../../db/index.js';

const app = new Hono()
  // Auto-initialize with middleware
  .use('*', createDbMiddleware({ initFn: initDb }))

  .get('/api/users', async (c) => {
    const db = getDb();
    const users = await db.select().from(schema.users);
    return c.json(users);
  });

Connection string management via environment variables:

•Set DATABASE_URL environment variable at each deployment destination
•createDbMiddleware() automatically reads environment variable
•Node.js: process.env.DATABASE_URL
•Cloudflare Workers: c.env.DATABASE_URL (via bindings)

Important: All packages connect to the same database, but connections are established individually per package.

Deployment Modes

Dry-Run Mode (Default)

Without explicit target or environment flags, shows deployment instructions:

bash

npx kagaribi deploy
npx kagaribi deploy users
npx kagaribi deploy --dry-run

Output: Platform-specific commands and setup instructions (does not deploy).

Actual Deployment

Specify target platform or environment to perform actual deployment:

bash

# Deploy specific package to target
npx kagaribi deploy users --cloudflare
npx kagaribi deploy payments --lambda
npx kagaribi deploy api --cloudrun

# Deploy all undeployed packages to target
npx kagaribi deploy --cloudflare
npx kagaribi deploy --lambda

# Deploy using environment configuration
npx kagaribi deploy --env production
npx kagaribi deploy --env staging

After successful deployment, kagaribi.config.ts is automatically updated with the deployed URL.

Platform-Specific Requirements

Cloudflare Workers

Required tool: wrangler

bash

npm install -g wrangler
wrangler login

Deploy command:

bash

kagaribi deploy users --cloudflare

What happens:

•Generates dist/users/wrangler.toml
•Runs wrangler deploy from dist/users/
•Updates kagaribi.config.ts with deployed URL

Environment variables: Configure in wrangler.toml:

toml

[env.production.vars]
DATABASE_URL = "postgresql://..."

AWS Lambda

Required tool: aws CLI Required environment variable: AWS_LAMBDA_ROLE_ARN

bash

# Install AWS CLI
brew install awscli  # or appropriate package manager
aws configure

# Set Lambda execution role ARN
export AWS_LAMBDA_ROLE_ARN=arn:aws:iam::123456789012:role/lambda-execution-role

Deploy command:

bash

kagaribi deploy payments --lambda

What happens:

•Creates Lambda function (or updates if exists)
•Uploads bundled code from dist/payments/index.js
•Updates kagaribi.config.ts with function URL
•Configures Node.js 22.x runtime

Environment variables:

bash

aws lambda update-function-configuration \
  --function-name payments \
  --environment Variables={DATABASE_URL=postgresql://...}

Google Cloud Run

Required tool: gcloud CLI Required environment variable: CLOUD_RUN_REGION (optional, defaults to us-central1)

bash

# Install gcloud CLI
brew install google-cloud-sdk
gcloud auth login
gcloud config set project YOUR_PROJECT_ID

# Set region (optional)
export CLOUD_RUN_REGION=asia-northeast1

Deploy command:

bash

kagaribi deploy api --cloudrun

What happens:

•Generates dist/api/Dockerfile
•Builds container image with Cloud Build
•Deploys to Cloud Run in specified region
•Updates kagaribi.config.ts with service URL

Environment variables:

bash

gcloud run services update api \
  --set-env-vars DATABASE_URL=postgresql://...

Deno Deploy

Required tool: deployctl

bash

npm install -g deployctl

Deploy command:

bash

kagaribi deploy notifications --deno

What happens:

•Uploads dist/notifications/index.js to Deno Deploy
•Creates or updates deployment
•Updates kagaribi.config.ts with deployed URL

Node.js (Manual Deployment)

No special tools required - Use your preferred deployment method.

bash

kagaribi build --env production

Deploy to server:

bash

# Copy dist/ directory to server
scp -r dist/ user@server:/app/

# On server, run with Node.js
cd /app/dist/root
node index.js

With PM2:

bash

pm2 start dist/root/index.js --name my-app
pm2 save

With systemd: Create /etc/systemd/system/my-app.service:

ini

[Unit]
Description=Kagaribi App

[Service]
ExecStart=/usr/bin/node /app/dist/root/index.js
WorkingDirectory=/app/dist/root
Restart=always
Environment=DATABASE_URL=postgresql://...

[Install]
WantedBy=multi-user.target

Co-location Strategy

Co-location bundles multiple packages into a single deployment for simpler infrastructure.

Configuration

typescript

// kagaribi.config.ts
export default defineConfig({
  packages: {
    root: {
      target: 'node',
    },
    auth: {
      colocateWith: 'root',  // Bundled with root
    },
    users: {
      colocateWith: 'root',  // Bundled with root
    },
    payments: {
      target: 'aws-lambda',  // Deployed separately
      url: 'https://payments.example.com',
    },
  },
});

Benefits:

•Fewer deployments to manage
•Lower infrastructure costs
•Reduced latency between co-located packages
•Simpler authentication/authorization

When to use:

•Development environment (all packages together)
•Small-to-medium projects
•Packages with tight coupling
•Cost optimization

When to deploy separately:

•Different scaling requirements
•Different geographic regions needed
•Security isolation required
•Team-based ownership boundaries

Automatic URL Management

After deployment, kagaribi.config.ts is automatically updated:

Before deployment:

typescript

export default defineConfig({
  packages: {
    users: {
      target: 'cloudflare-workers',
    },
  },
});

After kagaribi deploy users --cloudflare:

typescript

export default defineConfig({
  packages: {
    users: {
      target: 'cloudflare-workers',
      url: 'https://users.your-project.workers.dev',  // Auto-added
    },
  },
});

This enables:

•Automatic service discovery for RPC calls
•Environment-specific URL management
•No manual configuration updates needed

Environment-Based Deployment

Define multiple environments in kagaribi.config.ts:

typescript

export default defineConfig({
  packages: {
    root: { target: 'node' },
  },
  environments: {
    development: {
      packages: {
        '*': { colocateWith: 'root' },  // All local
      },
    },
    staging: {
      packages: {
        users: {
          target: 'cloudflare-workers',
          url: '$STAGING_USERS_URL',
        },
        payments: {
          target: 'aws-lambda',
          url: '$STAGING_PAYMENTS_URL',
        },
      },
    },
    production: {
      packages: {
        users: {
          target: 'cloudflare-workers',
          url: '$PROD_USERS_URL',
        },
        payments: {
          target: 'aws-lambda',
          url: '$PROD_PAYMENTS_URL',
        },
      },
    },
  },
});

Deploy to specific environment:

bash

# Set environment variables
export PROD_USERS_URL=https://users.prod.example.com
export PROD_PAYMENTS_URL=https://payments.prod.example.com

# Deploy
kagaribi deploy --env production

Database Deployment

Environment Variables

Set DATABASE_URL for each platform:

Cloudflare Workers (wrangler.toml):

toml

[env.production.vars]
DATABASE_URL = "postgresql://user:pass@host/db"

AWS Lambda:

bash

aws lambda update-function-configuration \
  --function-name my-function \
  --environment Variables={DATABASE_URL=postgresql://...}

Google Cloud Run:

bash

gcloud run services update my-service \
  --set-env-vars DATABASE_URL=postgresql://...

Node.js (.env or environment):

bash

export DATABASE_URL=postgresql://user:pass@host:5432/db
node dist/root/index.js

Running Migrations

Run migrations before deploying application code:

bash

# Local or CI/CD environment
pnpm run db:migrate

In CI/CD:

yaml

# Example: GitHub Actions
- name: Run migrations
  run: pnpm run db:migrate
  env:
    DATABASE_URL: ${{ secrets.DATABASE_URL }}

- name: Deploy
  run: kagaribi deploy --env production

Deployment Workflow Example

Scenario: Deploy to Production

•
Build the project:
bash
```
kagaribi build --env production
```

•

Deploy packages:

bash

# Deploy users to Cloudflare Workers
kagaribi deploy users --cloudflare

# Deploy payments to AWS Lambda
export AWS_LAMBDA_ROLE_ARN=arn:aws:iam::123456789012:role/lambda-role
kagaribi deploy payments --lambda

# Deploy API to Google Cloud Run
export CLOUD_RUN_REGION=us-central1
kagaribi deploy api --cloudrun

•

Verify deployments:

bash

curl https://users.your-project.workers.dev/health
curl https://payments-xyz.lambda-url.us-east-1.on.aws/health
curl https://api-xyz.run.app/health

•

Check configuration:

bash

cat kagaribi.config.ts
# Verify URLs are auto-updated

Best Practices

•Test locally first - Run npx kagaribi dev before deploying
•Use environments - Define staging and production configurations
•Secure secrets - Use environment variables, never commit credentials
•Deploy incrementally - Deploy to staging before production
•Monitor health - Include /health endpoints in all packages
•Co-locate wisely - Bundle related packages, split when scaling needs differ
•Run migrations first - Apply database changes before code deployment

Troubleshooting

Issue: Authentication error during deployment

•Solution: Ensure CLI tool is authenticated (wrangler login, aws configure, gcloud auth login)

Issue: AWS Lambda deployment fails with missing role

•Solution: Set AWS_LAMBDA_ROLE_ARN environment variable

Issue: Cloud Run deployment fails

•Solution: Verify project ID with gcloud config get-value project

Issue: RPC calls to deployed package fail

•Solution: Check url in kagaribi.config.ts and verify service is running

Issue: Database connection fails in production

•Solution: Verify DATABASE_URL is correctly set for the deployment platform

Next Steps

After deployment:

•Monitor logs and performance
•Set up alerts for errors
•Configure autoscaling if needed
•Implement rollback strategy
•Refer to USAGE.md for advanced deployment patterns