refactor(tool): destroy Truncate facade, effectify Tool.define (#22093)

packages/opencode/test/tool/bash.test.ts

@@ -8,6 +8,7 @@ import { Instance } from "../../src/project/instance"
 import { Filesystem } from "../../src/util/filesystem"
 import { tmpdir } from "../fixture/fixture"
 import type { Permission } from "../../src/permission"
+import { Agent } from "../../src/agent/agent"
 import { Truncate } from "../../src/tool/truncate"
 import { SessionID, MessageID } from "../../src/session/schema"
 import * as CrossSpawnSpawner from "../../src/effect/cross-spawn-spawner"
@@ -15,7 +16,13 @@ import { AppFileSystem } from "../../src/filesystem"
 import { Plugin } from "../../src/plugin"
 
 const runtime = ManagedRuntime.make(
-  Layer.mergeAll(CrossSpawnSpawner.defaultLayer, AppFileSystem.defaultLayer, Plugin.defaultLayer),
+  Layer.mergeAll(
+    CrossSpawnSpawner.defaultLayer,
+    AppFileSystem.defaultLayer,
+    Plugin.defaultLayer,
+    Truncate.defaultLayer,
+    Agent.defaultLayer,
+  ),
 )
 
 function initBash() {