test: add agents list consistency check between index.ts and files

Signed-off-by: leocavalcante <leo@cavalcante.dev>

Author: leocavalcante

tests/index.test.ts

@@ -1,4 +1,6 @@
 import { describe, expect, it } from "bun:test"
+import { readdirSync } from "node:fs"
+import { join } from "node:path"
 import pkg from "../package.json"
 import { agents, description, name, version } from "../src/index.ts"
 
@@ -25,4 +27,14 @@ describe("index.ts exports", () => {
 	it("should have 3 agents", () => {
 		expect(agents).toHaveLength(3)
 	})
+
+	it("should have matching agent files in agents/ directory", () => {
+		const agentsDir = join(import.meta.dirname, "..", "agents")
+		const files = readdirSync(agentsDir)
+		const mdFiles = files.filter((f) => f.endsWith(".md"))
+		const agentNamesFromFiles = mdFiles.map((f) => f.replace(/\.md$/, "")).sort()
+		const agentNamesFromExport = [...agents].sort()
+
+		expect(agentNamesFromExport).toEqual(agentNamesFromFiles)
+	})
 })