chore(deps): Kill small dependencies (#4467)

packages/coding-agent/test/ansi-utils.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "vitest";
+import { stripAnsi } from "../src/utils/ansi.js";
+
+describe("stripAnsi", () => {
+	it("strips RIS without leaking the final byte", () => {
+		expect(stripAnsi("\x1bcdone")).toBe("done");
+	});
+
+	it("strips single-byte ESC sequences without leaking final bytes", () => {
+		for (let code = "g".charCodeAt(0); code <= "m".charCodeAt(0); code++) {
+			expect(stripAnsi(`\x1b${String.fromCharCode(code)}ok`)).toBe("ok");
+		}
+		for (let code = "r".charCodeAt(0); code <= "t".charCodeAt(0); code++) {
+			expect(stripAnsi(`\x1b${String.fromCharCode(code)}ok`)).toBe("ok");
+		}
+	});
+
+	it("strips common ANSI sequences used in tool output", () => {
+		const input = "a\x1b[31mred\x1b[0m\x1b]8;;https://example.com\x07link\x1b]8;;\x07z";
+		expect(stripAnsi(input)).toBe("aredlinkz");
+	});
+});