implemented todo tool

packages/opencode/src/tool/todo.ts

@@ -0,0 +1,56 @@
+import { z } from "zod"
+import { Tool } from "./tool"
+import DESCRIPTION_WRITE from "./todowrite.txt"
+import { App } from "../app/app"
+
+const TodoInfo = z.object({
+  content: z.string().min(1).describe("Brief description of the task"),
+  status: z
+    .enum(["pending", "in_progress", "completed"])
+    .describe("Current status of the task"),
+  priority: z
+    .enum(["high", "medium", "low"])
+    .describe("Priority level of the task"),
+  id: z.string().describe("Unique identifier for the todo item"),
+})
+type TodoInfo = z.infer<typeof TodoInfo>
+
+const state = App.state("todo-tool", () => {
+  const todos: {
+    [sessionId: string]: TodoInfo[]
+  } = {}
+  return todos
+})
+
+export const TodoWriteTool = Tool.define({
+  id: "opencode.todowrite",
+  description: DESCRIPTION_WRITE,
+  parameters: z.object({
+    todos: z.array(TodoInfo).describe("The updated todo list"),
+  }),
+  async execute(params, opts) {
+    const todos = state()
+    todos[opts.sessionID] = params.todos
+    return {
+      output: JSON.stringify(params.todos, null, 2),
+      metadata: {
+        todos: params.todos,
+      },
+    }
+  },
+})
+
+export const TodoReadTool = Tool.define({
+  id: "opencode.todoread",
+  description: "Use this tool to read your todo list",
+  parameters: z.object({}),
+  async execute(params, opts) {
+    const todos = state()[opts.sessionID] ?? []
+    return {
+      metadata: {
+        todos,
+      },
+      output: JSON.stringify(todos, null, 2),
+    }
+  },
+})