Spectrum is Photon's unified messaging SDK. Write your handler logic once against a single stream and deliver it across every platform — iMessage, WhatsApp Business, your terminal, or a custom platform you build yourself.

The current SDK is

spectrum-ts

(TypeScript). Spectrum is multi-platform by design and multi-language is on the roadmap — additional language SDKs (e.g. Python, Go, Swift) will join the family. The architecture, primitives, and patterns described in this skill are intended to be language-neutral; code samples in the topic files are currently TypeScript and are flagged where the API surface is language-specific (imports, syntax, runtime types).

Each topic lives in its own file in this directory. Read the file relevant to the user's question.

getting-started.md

Spectrum()

messages.md

Message

content.type

content.md

text

attachment

voice

contact

richlink

poll

group

custom

spaces-and-users.md

Space

responding

reactions-and-replies.md

message.react(...)

message.reply(...)

platform-narrowing.md

providers/imessage.md

providers/terminal.md

providers/whatsapp-business.md

custom-events-and-lifecycle.md

app.typing

app.stop()

custom-platforms.md

definePlatform

best-practices.md