docs: add a subagents tutorial with a blog-writing Start app

docs/chat/subagents.md

@@ -14,6 +14,8 @@ keywords:
 
 You want a specialist to handle some turns (research, writing, a sandbox harness) while the parent chat stays one conversation. `chat({ subagents })` lets the parent start a child. A router can still keep the turn on the parent, and without a router the model can skip the child tool. When a child starts, the stream tags its events with `subagentRunId`, and the client stores the work in a `type: 'subagent'` part.
 
+Want a Start app with a researcher, an SEO agent, and a writer, routed by Jev? Open the [Subagents tutorial](../tutorials/subagents).
+
 ## Define a child
 
 `run` is a `chat()` call. The child can use tools, MCP, interrupts, and its own nested `subagents`.

docs/config.json

@@ -69,6 +69,11 @@
           "label": "Evaluate a ticket",
           "to": "tutorials/evaluate",
           "addedAt": "2026-09-18"
+        },
+        {
+          "label": "Subagents",
+          "to": "tutorials/subagents",
+          "addedAt": "2026-09-21"
         }
       ]
     },
@@ -95,6 +100,11 @@
           "label": "Evaluate",
           "to": "framework/react/examples/evaluate",
           "addedAt": "2026-09-18"
+        },
+        {
+          "label": "Subagents",
+          "to": "framework/react/examples/subagents",
+          "addedAt": "2026-09-21"
         }
       ]
     },

docs/getting-started/overview.md

@@ -22,6 +22,8 @@ Generate an image from a prompt in [Generate Image](../tutorials/generate-image)
 
 Stream a typed table from `chat({ outputSchema })` in [Streaming Structured Table](../tutorials/streaming-structured-table).
 
+Add three named agents (researcher, SEO, and writer) to a blog-writing chat in [Subagents](../tutorials/subagents).
+
 ## Key Features
 
 - ✅ **Type-Safe** - Full TypeScript support with Zod schema inference

docs/getting-started/quick-start.md

@@ -34,6 +34,8 @@ For an image from a prompt, open [Generate Image](../tutorials/generate-image).
 
 For a table that fills as JSON streams, open [Streaming Structured Table](../tutorials/streaming-structured-table).
 
+For a blog desk where a researcher and an SEO agent run together and a writer uses their notes, open [Subagents](../tutorials/subagents).
+
 > [!TIP]
 > If you do not want a key per provider, [OpenRouter](../adapters/openrouter) gives you 300+ models with one API key.