refactor(tool): migrate tool framework + all 18 built-in tools to Effect Schema (#23244)

packages/opencode/src/tool/todo.ts

@@ -1,39 +1,34 @@
-import z from "zod"
-import { Effect } from "effect"
+import { Effect, Schema } from "effect"
 import * as Tool from "./tool"
 import DESCRIPTION_WRITE from "./todowrite.txt"
 import { Todo } from "../session/todo"
 
-// Parameters are kept inline rather than derived from Todo.Info because
-// Tool.define requires z.ZodObject-typed parameters for execute() inference,
-// and zodObject(Todo.Info) returns ZodObject<any> — reaching into .shape would
-// erase field types. Tool schemas migrate to Effect Schema as a separate slice
-// per specs/effect/schema.md.
-const parameters = z.object({
-  todos: z
-    .array(
-      z.object({
-        content: z.string().describe("Brief description of the task"),
-        status: z.string().describe("Current status of the task: pending, in_progress, completed, cancelled"),
-        priority: z.string().describe("Priority level of the task: high, medium, low"),
-      }),
-    )
-    .describe("The updated todo list"),
+// Todo.Info is still a zod schema (session/todo.ts). Inline the field shape
+// here rather than referencing its `.shape` — the LLM-visible JSON Schema is
+// identical, and it removes the last zod dependency from this tool.
+const TodoItem = Schema.Struct({
+  content: Schema.String.annotate({ description: "Brief description of the task" }),
+  status: Schema.String.annotate({ description: "Current status of the task: pending, in_progress, completed, cancelled" }),
+  priority: Schema.String.annotate({ description: "Priority level of the task: high, medium, low" }),
+})
+
+export const Parameters = Schema.Struct({
+  todos: Schema.mutable(Schema.Array(TodoItem)).annotate({ description: "The updated todo list" }),
 })
 
 type Metadata = {
   todos: Todo.Info[]
 }
 
-export const TodoWriteTool = Tool.define<typeof parameters, Metadata, Todo.Service>(
+export const TodoWriteTool = Tool.define<typeof Parameters, Metadata, Todo.Service>(
   "todowrite",
   Effect.gen(function* () {
     const todo = yield* Todo.Service
 
     return {
       description: DESCRIPTION_WRITE,
-      parameters,
-      execute: (params: z.infer<typeof parameters>, ctx: Tool.Context<Metadata>) =>
+      parameters: Parameters,
+      execute: (params: Schema.Schema.Type<typeof Parameters>, ctx: Tool.Context<Metadata>) =>
         Effect.gen(function* () {
           yield* ctx.ask({
             permission: "todowrite",
@@ -55,6 +50,6 @@ export const TodoWriteTool = Tool.define<typeof parameters, Metadata, Todo.Servi
             },
           }
         }),
-    } satisfies Tool.DefWithoutID<typeof parameters, Metadata>
+    } satisfies Tool.DefWithoutID<typeof Parameters, Metadata>
   }),
 )