Photon Spectrum: Bring AI Agents to iMessage, WhatsApp and Telegram

Photon Spectrum, published as the MIT-licensed TypeScript SDK spectrum-ts, enables one AI agent server to operate across messaging interfaces including Photon-managed iMessage lines, WhatsApp Business, Telegram, local terminal chats, and SIP voice calls, while custom providers can support platforms such as websites, apps, or Discord. Providers translate platform-specific events and features into a common model of messages, conversation spaces, users, and adapters, leaving the agent’s reasoning, tools, memory, safety controls, and routing to the application developer. Spectrum’s iMessage integration supports native capabilities such as group chats, attachments, location sharing, message effects, and mini apps, but messaging agents require safeguards against burst messages, cancelled jobs, retry duplicates, cross-user memory leakage, insecure RTP voice audio, and channel-fallback inconsistencies. The terminal provider allows developers to reproduce many of these conditions locally before using live phone lines. TestMu AI Agent Testing can evaluate an exposed agent endpoint through multi-turn scenarios and score replies for qualities including hallucination, bias, completeness, and context awareness, while Agent Assurance’s rook CLI invokes agents against staging systems and verifies real-world effects, such as whether a requested money transfer occurred exactly once and only after confirmation. The recommended workflow is to develop and replay conversations locally, derive assurance criteria from every real-account action, run conversational and evidence-based tests in staging, and retain both suites in continuous integration as prompts and models change.

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