# Trajectory: Create Swift SDK for Relaycast

> **Status:** ✅ Completed
> **Confidence:** 88%
> **Started:** June 6, 2026 at 12:12 PM
> **Completed:** June 6, 2026 at 12:25 PM

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## Summary

Added a SwiftPM Relaycast SDK under packages/sdk-swift with REST client, WebSocket client, RelayCast and AgentClient surfaces, models, docs, changelog, and focused unit tests. Verified with swift test.

**Approach:** Standard approach

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## Key Decisions

### Implement Swift SDK as a SwiftPM package under packages/sdk-swift
- **Chose:** Implement Swift SDK as a SwiftPM package under packages/sdk-swift
- **Reasoning:** The repo already keeps language SDKs under packages/, and SwiftPM can build/test independently without changing the npm workspace or API schema. Foundation URLSession and URLSessionWebSocketTask avoid adding third-party dependencies while matching the TypeScript SDK's REST and realtime behavior.

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## Chapters

### 1. Work
*Agent: default*

- Implement Swift SDK as a SwiftPM package under packages/sdk-swift: Implement Swift SDK as a SwiftPM package under packages/sdk-swift
