refactor(agent): tighten harness environment and resources

packages/agent/test/harness/system-prompt.test.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it } from "vitest";
+import { formatSkillsForSystemPrompt } from "../../src/harness/system-prompt.js";
+
+describe("formatSkillsForSystemPrompt", () => {
+	it("formats visible skills and skips model-disabled skills", () => {
+		expect(
+			formatSkillsForSystemPrompt([
+				{
+					name: "visible",
+					description: "Use <this> & that",
+					content: "visible content",
+					filePath: "/skills/visible/SKILL.md",
+				},
+				{
+					name: "hidden",
+					description: "Hidden",
+					content: "hidden content",
+					filePath: "/skills/hidden/SKILL.md",
+					disableModelInvocation: true,
+				},
+			]),
+		).toContain("<name>visible</name>");
+		expect(
+			formatSkillsForSystemPrompt([
+				{
+					name: "visible",
+					description: "Use <this> & that",
+					content: "visible content",
+					filePath: "/skills/visible/SKILL.md",
+				},
+			]),
+		).toContain("Use &lt;this&gt; &amp; that");
+		expect(
+			formatSkillsForSystemPrompt([
+				{
+					name: "hidden",
+					description: "Hidden",
+					content: "hidden content",
+					filePath: "/skills/hidden/SKILL.md",
+					disableModelInvocation: true,
+				},
+			]),
+		).toBe("");
+	});
+});