refactor(agent): tighten harness environment and resources

packages/agent/test/scratch/simple.ts

@@ -1,13 +1,31 @@
 import { getModel } from "@mariozechner/pi-ai";
 import { InMemorySessionStorage } from "../../src/harness/session/storage/memory.js";
-import { createAgentHarness, NodeExecutionEnv, Session } from "../../src/index.js";
+import {
+	createAgentHarness,
+	formatSkillsForSystemPrompt,
+	loadSkills,
+	NodeExecutionEnv,
+	Session,
+} from "../../src/index.js";
 
+const env = new NodeExecutionEnv({ cwd: process.cwd() });
+const skills = await loadSkills(env, "/Users/badlogic/.pi/agent/skills");
 const session = new Session(new InMemorySessionStorage());
 const agent = createAgentHarness({
-	env: new NodeExecutionEnv({ cwd: process.cwd() }),
+	env,
 	session,
-	initialModel: getModel("openai-codex", "gpt-5.5"),
+	model: getModel("openai", "gpt-5.5"),
+	thinkingLevel: "low",
+	systemPrompt: ({ env, resources }) =>
+		[
+			`You are a helpful assistant.`,
+			formatSkillsForSystemPrompt(resources.skills ?? []),
+			`Current working directory: ${env.cwd}`,
+		]
+			.filter((part) => part.length > 0)
+			.join("\n\n"),
+	resources: { skills },
 });
 
-const response = await agent.prompt("What is 2 + 2?");
+const response = await agent.prompt("What skills do you have?");
 console.log(response);