SDK Integration Guide

This guide covers connecting to the Copilot SDK via Squad’s adapter layer, managing sessions, handling events, and recovering from errors.

SquadClient Setup

SquadClient wraps @github/copilot-sdk with lifecycle management and auto-reconnection:

import { SquadClient } from '@bradygaster/squad-sdk';

const client = new SquadClient({
  port: 3000,
  auth: { token: process.env.COPILOT_TOKEN },
  reconnection: { maxRetries: 5, backoffMs: 1000 },
});

await client.connect();

The client tracks connection state via SquadConnectionState: disconnected → connecting → connected → reconnecting → error. Auto-reconnection uses exponential backoff with jitter.

Session Management

Use SquadClientWithPool for production workloads — it composes SquadClient, SessionPool, and EventBus:

import { SquadClientWithPool } from '@bradygaster/squad-sdk';

const squad = new SquadClientWithPool({
  client: clientOptions,
  pool: { maxConcurrent: 10, idleTimeout: 60_000 },
});

const session = await squad.createSession({ agent: 'backend' });
const response = await session.sendMessage('Implement the /users endpoint');
await session.destroy();

SessionPool enforces concurrency limits, runs health checks, and reaps idle sessions automatically. SessionStatus tracks each session through creating → active → idle → error → destroyed.

Event Handling

EventBus provides typed pub/sub for session lifecycle events:

squad.events.on('session.created', (event) => {
  console.log(`Session ${event.sessionId} started`);
});

squad.events.on('session.status_changed', (event) => {
  if (event.payload.status === 'error') {
    // handle degraded session
  }
});

Events include session.created, session.destroyed, session.status_changed, and tool execution events.

Error Handling

All SDK errors are wrapped in SquadError subtypes with severity, category, and recoverability:

try {
  await client.connect();
} catch (err) {
  if (err instanceof SDKConnectionError) {
    // Retryable — client will auto-reconnect
  } else if (err instanceof AuthenticationError) {
    // Fatal — check credentials
  }
}

Error classes:

Class	Description
`SDKConnectionError`	Connection failures (retryable)
`SessionLifecycleError`	Session create/destroy issues
`ToolExecutionError`	Tool handler failures
`ModelAPIError`	Model API call failures
`ConfigurationError`	Invalid configuration
`AuthenticationError`	Auth failures (fatal)
`RateLimitError`	Rate limit exceeded
`RuntimeError`	General runtime errors
`ValidationError`	Input validation failures

Use ErrorFactory to wrap raw SDK errors with Squad context.

Telemetry

TelemetryCollector tracks operation latency and error rates. HealthMonitor runs periodic connection checks returning HealthCheckResult with status (healthy | degraded | unhealthy) and response time.