Coderule TypeScript Client SDK

TypeScript HTTP clients for core Coderule microservices (Auth, Sync, Retrieval, AST) with automatic fetch polyfill support.

Requirements

• Node.js 14+ (automatically uses node-fetch for versions < 18, native fetch for 18+)
• TypeScript 5.0+

Node.js Version Compatibility

• Node.js 18+: Uses native fetch API (no additional dependencies needed)
• Node.js 14-17: Requires node-fetch to be installed:

  npm install node-fetch@2

The library automatically detects your Node.js version and uses the appropriate fetch implementation.

Installation

npm install
npm run build

Usage Examples

Unified client access

import { CoderuleClients, consoleLogger } from '@coderule/clients';

const clients = new CoderuleClients({
  token: process.env.CODERULE_TOKEN!,
  auth: { baseUrl: 'https://r.coderule.ai:16803' }, // optional, defaults to this host
  logger: consoleLogger, // optional, defaults to nullLogger (silent)
});

const snapshotStatus = await clients.sync.checkSnapshotStatus(snapshotHash);
const retrieval = await clients.retrieval.query(snapshotHash, 'Find the entrypoint');
const visitorRules = await clients.ast.getVisitorRulesV2();

clients.close();

The unified client automatically exchanges your long-lived token for short-lived JWTs using the Auth service. Tokens are cached and refreshed halfway through their lifetime. Whenever the Auth service returns a JWT with a different server_url, the AST, Retrieval, and Sync clients update their base URLs on the fly.

You can override individual service hosts or timeouts:

const clients = new CoderuleClients({
  token,
  auth: { baseUrl: 'https://internal-auth.example.com' },
  retrieval: { timeout: 90_000 },
  sync: { baseUrl: 'http://localhost:8002' }, // static override keeps sync on localhost
});

Manual wiring

If you prefer to manage dependency injection yourself, wire the Auth client and JWT factory and pass the provider into the other clients.

import {
  AuthHttpClient,
  JWTFactory,
  RetrievalHttpClient,
  SyncHttpClient,
  ASTHttpClient,
} from '@coderule/clients';

const authClient = new AuthHttpClient('http://localhost:8001');
const jwtFactory = new JWTFactory(authClient, longLivedToken);

const syncClient = new SyncHttpClient({
  baseUrl: 'http://localhost:8002',
  jwtProvider: jwtFactory,
});

const astClient = new ASTHttpClient({
  baseUrl: 'http://localhost:8003',
  jwtProvider: jwtFactory,
});

const retrievalClient = new RetrievalHttpClient({
  baseUrl: 'http://localhost:8004',
  jwtProvider: jwtFactory,
});

const status = await syncClient.checkSnapshotStatus(snapshotHash);
const queryResult = await retrievalClient.query(snapshotHash, 'Find the entrypoint');
const rules = await astClient.getVisitorRulesV2();

Authentication service

const authClient = new AuthHttpClient('http://localhost:8001');

try {
  const authResponse = await authClient.authenticate('your-token');
  console.log(`JWT expires at: ${authResponse.expires_at}`);

  const health = await authClient.health();
  console.log(`Auth service status: ${health.status}`);
} finally {
  authClient.close();
}

Sync service

const syncClient = new SyncHttpClient({
  baseUrl: 'http://localhost:8002',
  jwtProvider: jwtFactory,
});

const files = [
  { file_path: 'src/main.ts', content: 'const x = 1;' },
  { file_path: 'src/utils.ts', content: 'export function util() {}' },
  { file_path: 'package.json', content: '{"name": "test"}' },
];

const filesInfo = [];
const fileHashes = [];
const fileContents = new Map();

for (const file of files) {
  const fileHash = SyncHttpClient.calculateFileHash(file.file_path, file.content);
  filesInfo.push({ file_path: file.file_path, file_hash: fileHash });
  fileContents.set(fileHash, {
    path: file.file_path,
    content: Buffer.from(file.content),
  });
  fileHashes.push(fileHash);
}

const snapshotHash = SyncHttpClient.calculateSnapshotHash(fileHashes);

const status = await syncClient.checkSnapshotStatus(snapshotHash);
if (status.status === 'NOT_FOUND') {
  const result = await syncClient.createSnapshot(snapshotHash, filesInfo);

  if (result.status === 'MISSING_CONTENT' && result.missing_files) {
    const missingContent = new Map();
    for (const missingFile of result.missing_files) {
      if (fileContents.has(missingFile.file_hash)) {
        missingContent.set(
          missingFile.file_hash,
          fileContents.get(missingFile.file_hash)!,
        );
      }
    }

    if (missingContent.size > 0) {
      await syncClient.uploadFileContent(missingContent);
      await syncClient.createSnapshot(snapshotHash, filesInfo);
    }
  }
}

AST service

const astClient = new ASTHttpClient({
  baseUrl: 'http://localhost:8003',
  jwtProvider: jwtFactory,
});

const health = await astClient.health();
console.log(`AST service status: ${health.status}`);

const rules = await astClient.getVisitorRulesV2();
console.log(`Rules format: ${rules.format}`);

const compiled = ASTHttpClient.compileRulesV2(rules);
const ignoredPredicate = ASTHttpClient.buildIgnoredPredicate(compiled);

Retrieval service

const retrievalClient = new RetrievalHttpClient({
  baseUrl: 'http://localhost:8004',
  jwtProvider: jwtFactory,
});

const result = await retrievalClient.query(
  snapshotHash,
  'Find the main authentication logic',
  3000,
  {
    formatter: 'compact',
    flow_strength: 1.5,
    blend_alpha: 0.8,
  },
);

console.log(result.formatted_output);

const status = await retrievalClient.checkSnapshotStatus(snapshotHash);
console.log(`Snapshot indexing status: ${status.status}`);

const cacheStats = await retrievalClient.getCacheStats();
console.log(`Cached snapshots: ${cacheStats.cached_snapshots}`);

Utility Methods

The SyncHttpClient provides static utility methods for hash calculation:

import { SyncHttpClient } from '@coderule/clients';

// Calculate file hash from path and content
const fileHash = SyncHttpClient.calculateFileHash('src/main.ts', 'const x = 1;');
console.log(`File hash: ${fileHash}`);

// Calculate snapshot hash from file hashes
const fileHashes = ['hash1', 'hash2', 'hash3'];
const snapshotHash = SyncHttpClient.calculateSnapshotHash(fileHashes);
console.log(`Snapshot hash: ${snapshotHash}`);

Error Handling

All clients throw errors with descriptive messages on failures:

try {
  const result = await client.someMethod();
} catch (error) {
  if (error.message.includes('timeout')) {
    console.error('Request timed out');
  } else if (error.message.includes('401')) {
    console.error('Authentication failed');
  } else {
    console.error('Unexpected error:', error.message);
  }
}

Configuration

All clients support timeout configuration in milliseconds:

// Custom timeout of 30 seconds
const retrievalClient = new RetrievalHttpClient({
  baseUrl: 'http://localhost:8004',
  timeout: 30_000,
  jwtProvider: jwtFactory,
  logger: consoleLogger, // optional
});

CoderuleClients also accepts per-service overrides via the auth, ast, retrieval, and sync options. JWTFactory exposes an onTokenRefreshed callback if you need to observe token rotations (for example, to log the current server_url).

Logging

The SDK includes a flexible logging interface that allows you to integrate with any logging library:

import { Logger, nullLogger, consoleLogger } from '@coderule/clients';

// Use the built-in silent logger (default)
const silentClients = new CoderuleClients({
  token,
  logger: nullLogger, // or omit for default
});

// Use the built-in console logger for debugging
const debugClients = new CoderuleClients({
  token,
  logger: consoleLogger,
});

// Implement your own logger
const customLogger: Logger = {
  error: (message, ...meta) => myLogger.error(message, meta),
  warn: (message, ...meta) => myLogger.warn(message, meta),
  info: (message, ...meta) => myLogger.info(message, meta),
  debug: (message, ...meta) => myLogger.debug(message, meta),
};

const clients = new CoderuleClients({
  token,
  logger: customLogger,
});

All individual clients also accept an optional logger parameter:

const authClient = new AuthHttpClient('http://localhost:8001', 30000, consoleLogger);

Breaking Changes

v1.6.0

• Logger interface added: All clients now accept an optional logger parameter
• Default behavior is silent: By default, clients use nullLogger which produces no output
• Backward compatible: The logger parameter is optional, existing code continues to work

v1.4.0

• Clients now require a JWT provider: SyncHttpClient, RetrievalHttpClient, and ASTHttpClient no longer accept JWT strings per method. Inject a JWTFactory or any JWTProvider implementation through the constructor instead.
• Unified entry point: CoderuleClients centralises token exchange. Auth defaults to https://r.coderule.ai:16803, and other clients automatically adopt the server_url provided by the Auth service unless explicitly overridden.

Notes

• Automatic fetch detection: Works with Node.js 14+ (uses node-fetch for < 18, native fetch for 18+)
• Optional dependency: node-fetch is only required for Node.js versions < 18
• Zero dependencies for Node.js 18+: Uses native fetch API
• Clients automatically handle JSON serialization/deserialization
• JWT handling is centralised through a JWTProvider (JWTFactory or CoderuleClients)
• AST, Retrieval, and Sync clients update their base URLs when the JWT refresh returns a different server_url (unless a manual override is configured)
• Health check endpoints don't require authentication
• All clients have a close() method for consistency, though fetch doesn't maintain persistent connections

Building from Source

# Install dependencies
npm install

# Build TypeScript to JavaScript
npm run build

# Output will be in dist/ directory

License

ISC