test(good-fences): lent a mower, a Think agent mows (red)

The first end-to-end test: a Project Think agent, on the real model,
writes code that runs in a dynamic worker and drives a mower; the test
counts the cells cut, and saves the turn to itest-output/.

Installs @cloudflare/think, @cloudflare/codemode, agents, ai,
workers-ai-provider, zod. The model-test worker now has a main entry,
the Neighbor DO, and a LOADER binding.

Red: src/worker.ts doesn't exist yet.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

good-fences/itest/neighbor.test.ts

@@ -0,0 +1,13 @@
+/** @file A Think agent, lent a mower, mows: model, generated code, sandbox, mower. */
+import { getAgentByName } from "agents";
+import { env } from "cloudflare:workers";
+import { expect, test } from "vitest";
+
+test("lent a mower, the neighbor mows", async ({ annotate }) => {
+	const neighbor = await getAgentByName(env.Neighbor, "weekend");
+	const turn = await neighbor.runTurn({ input: "you can use this mower for the weekend" });
+	await annotate("the turn", { body: JSON.stringify(turn, null, 2), contentType: "application/json" });
+
+	const cells = await neighbor.cutCells();
+	expect(cells.length).toBeGreaterThan(10);
+});

good-fences/itest/save-annotations.ts

@@ -5,7 +5,7 @@ import { mkdir, writeFile } from "node:fs/promises";
 import type { Reporter } from "vitest/reporters";
 
 const outDir = new URL("../itest-output/", import.meta.url);
-const extFor: Record<string, string> = { "text/javascript": "js", "text/plain": "txt" };
+const extFor: Record<string, string> = { "text/javascript": "js", "application/json": "json", "text/plain": "txt" };
 const slug = (text: string) => text.replace(/[^\w]+/g, "-").replace(/^-|-$/g, "");
 
 export default class SaveAnnotations implements Reporter {

good-fences/package.json

@@ -8,7 +8,13 @@
     "types": "wrangler types -c wrangler.model-tests.jsonc"
   },
   "dependencies": {
-    "ses": "^1.14.0"
+    "@cloudflare/codemode": "0.5.3",
+    "@cloudflare/think": "0.20.1",
+    "agents": "0.27.0",
+    "ai": "7.0.136",
+    "ses": "^1.14.0",
+    "workers-ai-provider": "4.0.0",
+    "zod": "4.6.5"
   },
   "devDependencies": {
     "@cloudflare/vitest-plugin": "1.3.6",

good-fences/wrangler.model-tests.jsonc

@@ -2,6 +2,15 @@
 	"$schema": "node_modules/wrangler/config-schema.json",
 	// model integration tests: AI always runs remotely, and costs money
 	"name": "good-fences-model-tests",
+	"main": "./src/worker.ts",
 	"compatibility_date": "2026-10-01",
-	"ai": { "binding": "AI", "remote": true }
+	"compatibility_flags": ["nodejs_compat"],
+	"ai": { "binding": "AI", "remote": true },
+	"worker_loaders": [{ "binding": "LOADER" }],
+	"durable_objects": {
+		"bindings": [{ "name": "Neighbor", "class_name": "Neighbor" }]
+	},
+	"exports": {
+		"Neighbor": { "type": "durable-object", "storage": "sqlite" }
+	}
 }