subagent

packages/opencode/src/tool/task.ts

@@ -0,0 +1,39 @@
+import { Tool } from "./tool"
+import DESCRIPTION from "./task.txt"
+import { z } from "zod"
+import { Session } from "../session"
+
+export const TaskTool = Tool.define({
+  id: "opencode.task",
+  description: DESCRIPTION,
+  parameters: z.object({
+    description: z
+      .string()
+      .describe("A short (3-5 words) description of the task"),
+    prompt: z.string().describe("The task for the agent to perform"),
+  }),
+  async execute(params, ctx) {
+    const session = await Session.create(ctx.sessionID)
+    const msg = await Session.getMessage(ctx.sessionID, ctx.messageID)
+    const metadata = msg.metadata.assistant!
+
+    const result = await Session.chat({
+      sessionID: session.id,
+      modelID: metadata.modelID,
+      providerID: metadata.providerID,
+      parts: [
+        {
+          type: "text",
+          text: params.prompt,
+        },
+      ],
+    })
+
+    return {
+      metadata: {
+        title: params.description,
+      },
+      output: result.parts.findLast((x) => x.type === "text")!.text,
+    }
+  },
+})

packages/opencode/src/tool/tool.ts

@@ -7,6 +7,7 @@ export namespace Tool {
   }
   export type Context = {
     sessionID: string
+    messageID: string
     abort: AbortSignal
   }
   export interface Info<