sms-development

SMS Development Guide

This skill provides guidance for developers working with the @rytass/sms base package, including creating new SMS adapters for Taiwan SMS service providers.

Overview

The @rytass/sms package defines the core interfaces and types that all SMS adapters must implement. It follows the adapter pattern to provide a unified API across different SMS providers.

Architecture

@rytass/sms (Base Package) │ ├── SMSService<Request, SendResponse, MultiTarget> # Service interface ├── SMSRequest # Single message interface ├── SMSSendResponse # Response interface ├── MultiTargetRequest # Batch message interface ├── SMSRequestResult # Status enum └── Taiwan Phone Number Helpers # Normalization utilities

@rytass/sms-adapter-* # Provider implementations │ ├── [Provider]SMSService # Implements SMSService ├── [Provider]SMSRequest # Extends SMSRequest ├── [Provider]SMSSendResponse # Extends SMSSendResponse └── [Provider] specific types and errors

Installation

npm install @rytass/sms

Core Interfaces

SMSService

The main interface that all SMS adapters must implement:

/**

SMS service interface
@template Request - SMS request type extending SMSRequest
@template SendResponse - SMS response type extending SMSSendResponse
@template MultiTarget - Multi-target request type extending MultiTargetRequest */ interface SMSService< Request extends SMSRequest, SendResponse extends SMSSendResponse, MultiTarget extends MultiTargetRequest,

{ /**

Send multiple SMS messages with different content
@param request - Array of SMS requests
@returns Promise resolving to array of send responses */ send(request: Request[]): Promise<SendResponse[]>;

/**

Send single SMS message
@param request - Single SMS request
@returns Promise resolving to send response */ send(request: Request): Promise<SendResponse>;

/**

Send same message to multiple recipients
@param request - Multi-target request with recipient list
@returns Promise resolving to array of send responses */ send(request: MultiTarget): Promise<SendResponse[]>; }

Base Request Types

/**

Base SMS request interface / interface SMSRequest { /* Recipient mobile phone number */ mobile: string;

/** Message text content */ text: string; }

/**

Multi-target request for sending same message to multiple recipients / interface MultiTargetRequest { /* Array of recipient mobile phone numbers */ mobileList: string[];

/** Message text content (same for all recipients) */ text: string; }

Base Response Types

/**

SMS request result status / enum SMSRequestResult { /* Message sent successfully */ SUCCESS = 'SUCCESS',

/** Message delivery failed */ FAILED = 'FAILED', }

/**

Base SMS send response interface / interface SMSSendResponse { /* Unique message identifier (if provided by gateway) */ messageId?: string;

/** Delivery status */ status: SMSRequestResult;

/** Recipient mobile phone number (normalized) */ mobile: string; }

Taiwan Phone Number Utilities

The base package provides utilities for handling Taiwan mobile numbers:

/**

Regular expression for validating Taiwan mobile phone numbers
Matches formats:
- 09XXXXXXXX (standard)
- 0912-345-678 (with dashes)
- 0912 345 678 (with spaces)
- +8869XXXXXXXX (international)
- 8869XXXXXXXX (international without +) */ const TAIWAN_PHONE_NUMBER_RE = /^(0|+?886-?)9\d{2}-?\d{3}-?\d{3}$/;

/**

Normalize Taiwan mobile phone number to standard format (09XXXXXXXX)
@param mobile - Phone number in any supported format
@returns Normalized phone number (09XXXXXXXX)
@example
normalizedTaiwanMobilePhoneNumber('0987-654-321') // '0987654321'
normalizedTaiwanMobilePhoneNumber('+886987654321') // '0987654321'
normalizedTaiwanMobilePhoneNumber('886987654321') // '0987654321' */ function normalizedTaiwanMobilePhoneNumber(mobile: string): string;

Implementation Guide

Step 1: Define Provider-Specific Types

Create interfaces extending the base types:

import { SMSRequest, SMSSendResponse, MultiTargetRequest, SMSRequestResult, } from '@rytass/sms';

/**

Provider-specific initialization options / export interface MyProviderSMSRequestInit { /* API username/account ID */ username: string;

/** API password/secret key */ password: string;

/** API base URL (optional, defaults to production) */ baseUrl?: string;

/** Restrict to Taiwan mobile numbers only */ onlyTaiwanMobileNumber?: boolean;

// Add any other provider-specific config }

/**

Provider-specific error codes / export enum MyProviderError { /* Invalid credentials */ INVALID_CREDENTIALS = -1,

/** Invalid phone number format */ FORMAT_ERROR = -2,

/** Insufficient account balance */ INSUFFICIENT_BALANCE = -3,

/** Rate limit exceeded */ RATE_LIMIT_EXCEEDED = -4,

/** Unknown error */ UNKNOWN = -99, }

/**

Provider-specific SMS request
Extends base SMSRequest with additional fields if needed */ export interface MyProviderSMSRequest extends SMSRequest { mobile: string; text: string;

// Add provider-specific fields if needed // priority?: 'low' | 'normal' | 'high'; // scheduledTime?: Date; }

/**

Provider-specific send response
Extends base SMSSendResponse with additional fields */ export interface MyProviderSMSSendResponse extends SMSSendResponse { messageId?: string; status: SMSRequestResult; mobile: string;

/** Error message if delivery failed */ errorMessage?: string;

/** Provider-specific error code */ errorCode?: MyProviderError;

// Add provider-specific fields if needed // cost?: number; // remainingBalance?: number; }

/**

Provider-specific multi-target request */ export interface MyProviderSMSMultiTargetRequest extends MultiTargetRequest { mobileList: string[]; text: string; }

Step 2: Implement the SMS Service

import { SMSService, SMSRequestResult, normalizedTaiwanMobilePhoneNumber, TAIWAN_PHONE_NUMBER_RE, } from '@rytass/sms'; import axios from 'axios';

/**

SMS service implementation for MyProvider
Implements the SMSService interface with provider-specific logic */ export class SMSServiceMyProvider implements SMSService< MyProviderSMSRequest, MyProviderSMSSendResponse, MyProviderSMSMultiTargetRequest

{ private readonly username: string; private readonly password: string; private readonly baseUrl: string; private readonly onlyTaiwanMobileNumber: boolean;

/**

Initialize SMS service
@param options - Provider configuration options */ constructor(options: MyProviderSMSRequestInit) { this.username = options.username; this.password = options.password; this.baseUrl = options.baseUrl || 'https://api.myprovider.com'; this.onlyTaiwanMobileNumber = options.onlyTaiwanMobileNumber || false; }

/**

Send SMS message(s)
Handles three sending patterns:
1. Single SMS to one recipient
1. Multiple SMS with different messages
1. Same message to multiple recipients */ async send(requests: MyProviderSMSRequest[]): Promise<MyProviderSMSSendResponse[]>; async send(request: MyProviderSMSRequest): Promise<MyProviderSMSSendResponse>; async send(request: MyProviderSMSMultiTargetRequest): Promise<MyProviderSMSSendResponse[]>;

async send( requests: MyProviderSMSMultiTargetRequest | MyProviderSMSRequest | MyProviderSMSRequest[], ): Promise<MyProviderSMSSendResponse | MyProviderSMSSendResponse[]> { // Validate input if ( (Array.isArray(requests) && !requests.length) || ((requests as MyProviderSMSMultiTargetRequest).mobileList && !(requests as MyProviderSMSMultiTargetRequest).mobileList?.length) ) { throw new Error('No target provided.'); }

// Process and validate phone numbers
const processedRequests = this.processRequests(requests);

// Send to provider API
const results = await this.sendToProvider(processedRequests);

// Return results in appropriate format
return this.formatResults(requests, results);

}

/**

Process and validate phone numbers
@param requests - Raw requests
@returns Processed requests with normalized phone numbers */ private processRequests( requests: MyProviderSMSMultiTargetRequest | MyProviderSMSRequest | MyProviderSMSRequest[], ): Array<{ mobile: string; text: string }> { const requestArray = Array.isArray(requests) ? requests : [requests]; const processed: Array<{ mobile: string; text: string }> = [];

for (const request of requestArray) {

  if ((request as MyProviderSMSMultiTargetRequest).mobileList) {
    // Multi-target request
    const multiTarget = request as MyProviderSMSMultiTargetRequest;

    for (const mobile of multiTarget.mobileList) {
      const normalizedMobile = this.validateAndNormalizeMobile(mobile);
      processed.push({
        mobile: normalizedMobile,
        text: multiTarget.text,
      });
    }
  } else {
    // Single request
    const singleRequest = request as MyProviderSMSRequest;
    const normalizedMobile = this.validateAndNormalizeMobile(singleRequest.mobile);
    processed.push({
      mobile: normalizedMobile,
      text: singleRequest.text,
    });
  }
}

return processed;

}

/**

Validate and normalize phone number
@param mobile - Raw phone number
@returns Normalized phone number
@throws Error if number is invalid and onlyTaiwanMobileNumber is true */ private validateAndNormalizeMobile(mobile: string): string { // Check if Taiwan number if (TAIWAN_PHONE_NUMBER_RE.test(mobile)) { return normalizedTaiwanMobilePhoneNumber(mobile); }

// If strict Taiwan-only mode, reject non-Taiwan numbers

if (this.onlyTaiwanMobileNumber) {
  throw new Error(
    `${mobile} is not taiwan mobile phone (\`onlyTaiwanMobileNumber\` option is true)`
  );
}

// Return as-is for international numbers
return mobile;

}

/**

Send requests to provider API
@param requests - Processed requests
@returns API responses */ private async sendToProvider( requests: Array<{ mobile: string; text: string }>, ): Promise<Map<string, MyProviderSMSSendResponse>> { // Group requests by message text for batch optimization const batches = this.groupByMessage(requests); const results = new Map<string, MyProviderSMSSendResponse>();

// Send each batch

for (const [message, mobileList] of batches.entries()) {
  try {
    // Call provider API
    const response = await this.callProviderAPI(mobileList, message);

    // Process API response
    const batchResults = this.parseAPIResponse(response, mobileList, message);

    // Store results
    for (const [key, result] of batchResults.entries()) {
      results.set(key, result);
    }
  } catch (error) {
    // Handle API errors
    for (const mobile of mobileList) {
      results.set(`${message}:${mobile}`, {
        status: SMSRequestResult.FAILED,
        mobile,
        errorMessage: error.message,
        errorCode: MyProviderError.UNKNOWN,
      });
    }
  }
}

return results;

}

/**

Group requests by message text for batch sending
@param requests - Array of requests
@returns Map of message text to mobile numbers */ private groupByMessage( requests: Array<{ mobile: string; text: string }>, ): Map<string, string[]> { const batches = new Map<string, string[]>();

for (const request of requests) {

  const existing = batches.get(request.text) || [];
  batches.set(request.text, [...existing, request.mobile]);
}

return batches;

}

/**

Call provider API
IMPORTANT: Implement this method according to your provider's API specification
@param mobileList - Array of phone numbers
@param message - Message text
@returns API response
NOTE: Every8D uses the following API specification:
- Endpoint: ${baseUrl}/API21/HTTP/SendSMS.ashx
- Method: POST with application/x-www-form-urlencoded
- Parameters: UID (username), PWD (password), MSG (message), DEST (comma-separated mobiles)
- Response: CSV format: "credit,sent,cost,unsent,batchId" or "errorCode,errorMessage" */ private async callProviderAPI( mobileList: string[], message: string, ): Promise<any> { // Example implementation using Every8D API format // Other providers may use different endpoints and parameters const { data } = await axios.post( ${this.baseUrl}/API21/HTTP/SendSMS.ashx, new URLSearchParams({ UID: this.username, // Every8D uses UID for username PWD: this.password, // Every8D uses PWD for password MSG: message, // Every8D uses MSG for message content DEST: mobileList.join(','), // Every8D uses DEST for comma-separated recipients }), { headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, } );

return data;

}

/**

Parse provider API response
IMPORTANT: Implement this method according to your provider's response format
@param response - API response data
@param mobileList - Array of phone numbers
@param message - Message text
@returns Map of results keyed by "message:mobile" */ private parseAPIResponse( response: any, mobileList: string[], message: string, ): Map<string, MyProviderSMSSendResponse> { const results = new Map<string, MyProviderSMSSendResponse>();

// Example parsing - REPLACE WITH ACTUAL PROVIDER RESPONSE PARSING

if (response.success) {
  // All succeeded
  for (const mobile of mobileList) {
    results.set(`${message}:${mobile}`, {
      messageId: response.messageId,
      status: SMSRequestResult.SUCCESS,
      mobile,
    });
  }
} else {
  // All failed
  for (const mobile of mobileList) {
    results.set(`${message}:${mobile}`, {
      status: SMSRequestResult.FAILED,
      mobile,
      errorMessage: response.errorMessage,
      errorCode: response.errorCode,
    });
  }
}

return results;

}

/**

Format results based on original request type
@param originalRequest - Original request
@param results - Processed results map
@returns Formatted response(s) */ private formatResults( originalRequest: MyProviderSMSMultiTargetRequest | MyProviderSMSRequest | MyProviderSMSRequest[], results: Map<string, MyProviderSMSSendResponse>, ): MyProviderSMSSendResponse | MyProviderSMSSendResponse[] { // Multi-target request if ((originalRequest as MyProviderSMSMultiTargetRequest).mobileList) { const multiTarget = originalRequest as MyProviderSMSMultiTargetRequest;

return multiTarget.mobileList.map(mobile => { const normalizedMobile = TAIWAN_PHONE_NUMBER_RE.test(mobile) ? normalizedTaiwanMobilePhoneNumber(mobile) : mobile;

return results.get(${multiTarget.text}:${normalizedMobile})!; }); }

// Array of requests

if (Array.isArray(originalRequest)) {
  return originalRequest.map(request => {
    const normalizedMobile = TAIWAN_PHONE_NUMBER_RE.test(request.mobile)
      ? normalizedTaiwanMobilePhoneNumber(request.mobile)
      : request.mobile;

    return results.get(`${request.text}:${normalizedMobile}`)!;
  });
}

// Single request
const singleRequest = originalRequest as MyProviderSMSRequest;
const normalizedMobile = TAIWAN_PHONE_NUMBER_RE.test(singleRequest.mobile)
  ? normalizedTaiwanMobilePhoneNumber(singleRequest.mobile)
  : singleRequest.mobile;

return results.get(`${singleRequest.text}:${normalizedMobile}`)!;

} }

Step 3: Export Public API

// index.ts export { SMSServiceMyProvider } from './sms-service-my-provider'; export * from './typings';

Step 4: Add Tests

// tests/sms-service-my-provider.spec.ts import { SMSServiceMyProvider } from '../src/sms-service-my-provider'; import { SMSRequestResult } from '@rytass/sms';

describe('SMSServiceMyProvider', () => { let smsService: SMSServiceMyProvider;

beforeEach(() => { smsService = new SMSServiceMyProvider({ username: 'test-username', password: 'test-password', onlyTaiwanMobileNumber: true, }); });

describe('send - single SMS', () => { it('should send single SMS successfully', async () => { const result = await smsService.send({ mobile: '0987654321', text: 'Test message', });

  expect(result.status).toBe(SMSRequestResult.SUCCESS);
  expect(result.mobile).toBe('0987654321');
  expect(result.messageId).toBeDefined();
});

it('should normalize Taiwan phone number', async () => {
  const result = await smsService.send({
    mobile: '+886987654321',
    text: 'Test message',
  });

  expect(result.mobile).toBe('0987654321');
});

it('should reject non-Taiwan number when onlyTaiwanMobileNumber is true', async () => {
  await expect(
    smsService.send({
      mobile: '+1234567890',
      text: 'Test message',
    })
  ).rejects.toThrow('is not taiwan mobile phone');
});

});

describe('send - batch SMS', () => { it('should send same message to multiple recipients', async () => { const results = await smsService.send({ mobileList: ['0987654321', '0912345678', '0923456789'], text: 'Batch message', });

  expect(results).toHaveLength(3);
  expect(results.every(r => r.status === SMSRequestResult.SUCCESS)).toBe(true);
});

it('should send different messages to multiple recipients', async () => {
  const results = await smsService.send([
    { mobile: '0987654321', text: 'Message 1' },
    { mobile: '0912345678', text: 'Message 2' },
    { mobile: '0923456789', text: 'Message 3' },
  ]);

  expect(results).toHaveLength(3);
  expect(results.every(r => r.status === SMSRequestResult.SUCCESS)).toBe(true);
});

});

describe('error handling', () => { it('should handle API errors gracefully', async () => { // Mock API error // ... test implementation });

it('should return FAILED status on delivery failure', async () => {
  // Mock failed delivery
  // ... test implementation
});

}); });

Implementation Checklist

When implementing a new SMS adapter, ensure:

Required Features

Interface Implementation: Implements SMSService<Request, SendResponse, MultiTarget>
Single SMS: Supports sending single SMS to one recipient
Batch SMS: Supports sending same message to multiple recipients
Multi-target: Supports sending different messages to multiple recipients
Phone Validation: Validates phone numbers before sending
Number Normalization: Uses normalizedTaiwanMobilePhoneNumber() for Taiwan numbers
Error Handling: Returns appropriate error codes and messages
Type Safety: All methods have proper TypeScript types

Recommended Features

Taiwan Number Support: Uses TAIWAN_PHONE_NUMBER_RE for validation
Strict Mode: Implements onlyTaiwanMobileNumber option
International Support: Handles international numbers when strict mode is disabled
Message Batching: Groups messages for efficient API calls
Rate Limiting: Implements rate limiting if required by provider
Retry Logic: Implements retry for transient failures
Logging: Logs API calls and errors for debugging
Documentation: Includes comprehensive JSDoc comments

Quality Assurance

Unit Tests: Comprehensive test coverage (>80%)
Integration Tests: Tests against provider API (staging environment)
Error Cases: Tests all error scenarios
Edge Cases: Tests edge cases (empty lists, invalid numbers, etc.)
Performance: Tests batch performance with large recipient lists
README: Complete README with examples and API reference

Best Practices

Phone Number Handling

// ✅ GOOD: Use provided utilities import { normalizedTaiwanMobilePhoneNumber, TAIWAN_PHONE_NUMBER_RE } from '@rytass/sms';

private validateMobile(mobile: string): string { if (TAIWAN_PHONE_NUMBER_RE.test(mobile)) { return normalizedTaiwanMobilePhoneNumber(mobile); }

if (this.onlyTaiwanMobileNumber) { throw new Error(Invalid Taiwan mobile number: ${mobile}); }

return mobile; }

// ❌ BAD: Custom regex without normalization private validateMobile(mobile: string): string { if (!/^09\d{8}$/.test(mobile)) { throw new Error('Invalid number'); } return mobile; }

Error Handling

// ✅ GOOD: Detailed error information catch (error) { return { status: SMSRequestResult.FAILED, mobile, errorMessage: error.response?.data?.message || error.message, errorCode: this.mapProviderErrorCode(error.response?.data?.code), }; }

// ❌ BAD: Generic error without details catch (error) { return { status: SMSRequestResult.FAILED, mobile, }; }

Batch Optimization

// ✅ GOOD: Group by message for efficiency private groupByMessage(requests: Array<{ mobile: string; text: string }>) { const batches = new Map<string, string[]>();

for (const request of requests) { const existing = batches.get(request.text) || []; batches.set(request.text, [...existing, request.mobile]); }

return batches; }

// ❌ BAD: Send each message individually for (const request of requests) { await this.callAPI(request.mobile, request.text); }

Type Safety

// ✅ GOOD: Strict typing with generics export class SMSServiceMyProvider implements SMSService< MyProviderSMSRequest, MyProviderSMSSendResponse, MyProviderSMSMultiTargetRequest

{ // ... }

// ❌ BAD: Using any or loose typing export class SMSServiceMyProvider { async send(request: any): Promise<any> { // ... } }

Configuration

// ✅ GOOD: Environment-based configuration export class SMSServiceMyProvider { constructor(options: MyProviderSMSRequestInit) { this.baseUrl = options.baseUrl || this.getDefaultBaseUrl(); }

private getDefaultBaseUrl(): string { return process.env.NODE_ENV === 'production' ? 'https://api.myprovider.com' : 'https://api-staging.myprovider.com'; } }

// ❌ BAD: Hardcoded production URL export class SMSServiceMyProvider { private baseUrl = 'https://api.myprovider.com'; }

API Reference

Base Package Exports

// Types export { SMSService, // Service interface SMSRequest, // Single message interface SMSSendResponse, // Response interface MultiTargetRequest, // Batch message interface SMSRequestResult, // Status enum };

// Utilities export { TAIWAN_PHONE_NUMBER_RE, // Taiwan number regex normalizedTaiwanMobilePhoneNumber, // Normalization function };

Taiwan Number Validation

Supported Formats:

09XXXXXXXX
Standard Taiwan format
0912-345-678
With dashes
0912 345 678
With spaces
+8869XXXXXXXX
International with +
8869XXXXXXXX
International without +

Normalization Output:

Always returns 09XXXXXXXX format
Removes dashes, spaces, and country code
Converts +886 or 886 prefix to 0

Examples

Minimal Adapter Implementation

import { SMSService, SMSRequest, SMSSendResponse, MultiTargetRequest, SMSRequestResult, } from '@rytass/sms';

interface SimpleSMSRequest extends SMSRequest { mobile: string; text: string; }

interface SimpleSMSResponse extends SMSSendResponse { messageId?: string; status: SMSRequestResult; mobile: string; }

interface SimpleMultiTargetRequest extends MultiTargetRequest { mobileList: string[]; text: string; }

export class SimpleSMSService implements SMSService< SimpleSMSRequest, SimpleSMSResponse, SimpleMultiTargetRequest

{ async send(requests: SimpleSMSRequest[]): Promise<SimpleSMSResponse[]>; async send(request: SimpleSMSRequest): Promise<SimpleSMSResponse>; async send(request: SimpleMultiTargetRequest): Promise<SimpleSMSResponse[]>;

async send(request: any): Promise<any> { // Minimal implementation if (Array.isArray(request)) { return Promise.all(request.map(r => this.sendSingle(r))); }

if (request.mobileList) {
  return Promise.all(
    request.mobileList.map(mobile =>
      this.sendSingle({ mobile, text: request.text })
    )
  );
}

return this.sendSingle(request);

}

private async sendSingle(request: SimpleSMSRequest): Promise<SimpleSMSResponse> { // Call provider API // Return response return { messageId: 'MSG-' + Date.now(), status: SMSRequestResult.SUCCESS, mobile: request.mobile, }; } }

Common Provider Patterns

HTTP-based API

Most Taiwan SMS providers use HTTP POST:

private async callProviderAPI(mobile: string, text: string): Promise<any> { const { data } = await axios.post( ${this.baseUrl}/api/sms/send, new URLSearchParams({ username: this.username, password: this.password, mobile: mobile, message: text, }), { headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, } );

return data; }

CSV Response Format

Some providers return CSV responses:

private parseCSVResponse(data: string): { messageId: string; status: SMSRequestResult; } { const [credit, sent, cost, unsent, messageId] = data.split(',');

return { messageId, status: messageId ? SMSRequestResult.SUCCESS : SMSRequestResult.FAILED, }; }

Signature-based Authentication

Some providers require request signatures:

import crypto from 'crypto';

private generateSignature(params: Record<string, string>): string { const sorted = Object.keys(params) .sort() .map(key => ${key}=${params[key]}) .join('&');

return crypto .createHash('md5') .update(sorted + this.secretKey) .digest('hex'); }

Troubleshooting

Common Issues

TypeScript Errors:

// Error: Type 'X' is not assignable to type 'SMSService<...>' // Solution: Ensure all three send() overloads are implemented

async send(requests: MyProviderSMSRequest[]): Promise<MyProviderSMSSendResponse[]>; async send(request: MyProviderSMSRequest): Promise<MyProviderSMSSendResponse>; async send(request: MyProviderSMSMultiTargetRequest): Promise<MyProviderSMSSendResponse[]>;

Phone Number Validation:

// Issue: Numbers not being normalized correctly // Solution: Use TAIWAN_PHONE_NUMBER_RE before normalizing

if (TAIWAN_PHONE_NUMBER_RE.test(mobile)) { mobile = normalizedTaiwanMobilePhoneNumber(mobile); }

Batch Optimization:

// Issue: Too many API calls // Solution: Group requests by message text

const batches = requests.reduce((map, req) => { const list = map.get(req.text) || []; map.set(req.text, [...list, req.mobile]); return map; }, new Map<string, string[]>());

Publishing Checklist

Before publishing your adapter:

Package name follows convention: @rytass/sms-adapter-{provider}
Peer dependency on @rytass/sms is declared
All exports are properly typed
README includes installation, usage, and examples
Tests pass with >80% coverage
TypeScript builds without errors
Package builds with npm run build
Version follows semantic versioning
CHANGELOG.md is updated
License is included (MIT recommended)

Resources

For reference implementations:

Every8D Adapter - Complete reference implementation (互動資通 / Interactive Communications)
Base Package - Core interfaces and utilities

For usage guidance:

SMS Adapters Skill - User guide for SMS adapters

sms-development

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