---

name: replit-sdk-patterns description: | Apply production-ready Replit SDK patterns for TypeScript and Python. Use when implementing Replit integrations, refactoring SDK usage, or establishing team coding standards for Replit. Trigger with phrases like "replit SDK patterns", "replit best practices", "replit code patterns", "idiomatic replit". allowed-tools: Read, Write, Edit version: 1.0.0 license: MIT author: Jeremy Longshore jeremy@intentsolutions.io compatible-with: claude-code, codex, openclaw

Replit SDK Patterns

Overview

Production-ready patterns for Replit SDK usage in TypeScript and Python.

Prerequisites

• Completed replit-install-auth setup
• Familiarity with async/await patterns
• Understanding of error handling best practices

Instructions

Step 1: Implement Singleton Pattern (Recommended)

// src/replit/client.ts
import { ReplitClient } from '@replit/sdk';

let instance: ReplitClient | null = null;

export function getReplitClient(): ReplitClient {
  if (!instance) {
    instance = new ReplitClient({
      apiKey: process.env.REPLIT_API_KEY!,
      // Additional options
    });
  }
  return instance;
}

Step 2: Add Error Handling Wrapper

import { ReplitError } from '@replit/sdk';

async function safeReplitCall<T>(
  operation: () => Promise<T>
): Promise<{ data: T | null; error: Error | null }> {
  try {
    const data = await operation();
    return { data, error: null };
  } catch (err) {
    if (err instanceof ReplitError) {
      console.error({
        code: err.code,
        message: err.message,
      });
    }
    return { data: null, error: err as Error };
  }
}

Step 3: Implement Retry Logic

async function withRetry<T>(
  operation: () => Promise<T>,
  maxRetries = 3,
  backoffMs = 1000
): Promise<T> {
  for (let attempt = 1; attempt <= maxRetries; attempt++) {
    try {
      return await operation();
    } catch (err) {
      if (attempt === maxRetries) throw err;
      const delay = backoffMs * Math.pow(2, attempt - 1);
      await new Promise(r => setTimeout(r, delay));
    }
  }
  throw new Error('Unreachable');
}

Output

• Type-safe client singleton
• Robust error handling with structured logging
• Automatic retry with exponential backoff
• Runtime validation for API responses

Error Handling

| Pattern | Use Case | Benefit | |---------|----------|---------| | Safe wrapper | All API calls | Prevents uncaught exceptions | | Retry logic | Transient failures | Improves reliability | | Type guards | Response validation | Catches API changes | | Logging | All operations | Debugging and monitoring |

Examples

Factory Pattern (Multi-tenant)

const clients = new Map<string, ReplitClient>();

export function getClientForTenant(tenantId: string): ReplitClient {
  if (!clients.has(tenantId)) {
    const apiKey = getTenantApiKey(tenantId);
    clients.set(tenantId, new ReplitClient({ apiKey }));
  }
  return clients.get(tenantId)!;
}

Python Context Manager

from contextlib import asynccontextmanager
from replit import ReplitClient

@asynccontextmanager
async def get_replit_client():
    client = ReplitClient()
    try:
        yield client
    finally:
        await client.close()

Zod Validation

import { z } from 'zod';

const replitResponseSchema = z.object({
  id: z.string(),
  status: z.enum(['active', 'inactive']),
  createdAt: z.string().datetime(),
});

Resources

• Replit SDK Reference
• Replit API Types
• Zod Documentation

Next Steps

Apply patterns in replit-core-workflow-a for real-world usage.