> ## Documentation Index
> Fetch the complete documentation index at: https://docs.photon.codes/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Use Stable documentation by default. Honor an explicit Beta request or a URL under /docs/beta/. If the requested version conflicts with the installed CLI package or API origin, clarify the target before writing integration code.
> Pages under /docs/beta/ document Beta; other product pages document Stable. Keep the CLI package, commands, API origin, and credentials within the selected version. State the documentation version in your answer.
> For MCP search, always pass version: Stable or version: Beta. Unfiltered search mixes both versions. For filesystem reads, keep Beta queries under /beta/ and exclude /beta/ from Stable queries; discover paths before reading them.
> The public docs base is https://photon.codes/docs. Convert MCP page paths to public URLs under that base, preserving /beta/ when present. Read https://photon.codes/docs/skill.md for version selection and https://photon.codes/docs/llms.txt for the version indexes.

# ReactionHandler

> Handler for reaction events.

```typescript
// Handle specific emoji
chat.onReaction(["thumbs_up", "heart"], async (event) => {
  console.log(`${event.user.userName} ${event.added ? "added" : "removed"} ${event.emoji}`);
});

// Handle all reactions
chat.onReaction(async (event) => {
  // ...
});
```

```typescript
type ReactionHandler = (event: ReactionEvent) => void | Promise<void>
```


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