[chat] Add chat/test entrypoint for consumer test utilities

[matchai]

Exposes the existing internal test utilities via a chat/test entrypoint so consumers can create type-safe Thread and Message instances without fromPartial or manual mock construction. When the SDK's interfaces change, these factories are updated in the same release — consumers just bump the dependency.

createTestThread constructs a real ThreadImpl backed by a mock adapter with spyable methods. Accepts adapter as a string (name) or object (name + overrides like botUserId). All ThreadImplConfigWithAdapter fields are accepted as optional overrides.

createTestMessage constructs a real Message instance. Only text is required — id, author, raw, and any MessageData fields are optional with sensible defaults.

import { createTestThread, createTestMessage } from "chat/test";

const thread = createTestThread({
  adapter: "slack",
  id: "T123:C456",
  channelId: "C456",
});

const message = createTestMessage({
  text: "deploy my app",
  author: { userId: "U789" },
  raw: { team_id: "T123" },
});

// Adapter-specific overrides
const slackThread = createTestThread({
  adapter: { name: "slack", botUserId: "B123" },
});

// All ThreadImplConfig fields accepted
const dmThread = createTestThread({
  adapter: "discord",
  isDM: true,
  channelVisibility: "private",
});

vitest is an optional peer dependency — consumers need it installed for the vi.fn() spies.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
chat	Ready	Preview, Comment, Open in v0	Apr 9, 2026 3:22am
chat-sdk-nextjs-chat	Ready	Preview, Comment, Open in v0	Apr 9, 2026 3:22am