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feat: ai-chat reference project + MCP agent-chat tooling (5/5) #3546

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feat: ai-chat reference project + MCP agent-chat tooling (5/5) #3546

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15 changes: 15 additions & 0 deletions .changeset/ai-tool-helpers.md
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---
"@trigger.dev/sdk": patch
---

Add `ai.toolExecute(task)` so you can wire a Trigger subtask in as the `execute` handler of an AI SDK `tool()` while defining `description` and `inputSchema` yourself — useful when you want full control over the tool surface and just need Trigger's subtask machinery for the body.

```ts
const myTool = tool({
description: "...",
inputSchema: z.object({ ... }),
execute: ai.toolExecute(mySubtask),
});
```

`ai.tool(task)` (`toolFromTask`) keeps doing the all-in-one wrap and now aligns its return type with AI SDK's `ToolSet`. Minimum `ai` peer raised to `^6.0.116` to avoid cross-version `ToolSet` mismatches in monorepos.
5 changes: 5 additions & 0 deletions .changeset/mcp-agent-chat-sessions.md
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"trigger.dev": patch
---

The CLI MCP server's agent-chat tools (`start_agent_chat`, `send_agent_message`, `close_agent_chat`) now run on the new Sessions primitive, so AI assistants driving a `chat.agent` get the same idempotent-by-`chatId`, durable-across-runs behavior the browser transport gets. Required PAT scopes go from `write:inputStreams` to `read:sessions` + `write:sessions`.
416 changes: 416 additions & 0 deletions .claude/architecture/chat-agent-sessions.md
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