Add startup session name flag

closes #5153

packages/coding-agent/test/args.test.ts

@@ -157,6 +157,36 @@ describe("parseArgs", () => {
 		});
 	});
 
+	describe("--name flag", () => {
+		test("parses --name flag with value", () => {
+			const result = parseArgs(["--name", "my-session"]);
+			expect(result.name).toBe("my-session");
+		});
+
+		test("parses -n shorthand", () => {
+			const result = parseArgs(["-n", "quick-session"]);
+			expect(result.name).toBe("quick-session");
+		});
+
+		test("preserves empty values for main validation", () => {
+			const result = parseArgs(["--name", ""]);
+			expect(result.name).toBe("");
+		});
+
+		test("reports missing value", () => {
+			const result = parseArgs(["--name"]);
+			expect(result.diagnostics).toEqual([{ type: "error", message: "--name requires a value" }]);
+		});
+
+		test("works alongside other flags", () => {
+			const result = parseArgs(["--name", "named-run", "--print", "--model", "gpt-4o", "hello"]);
+			expect(result.name).toBe("named-run");
+			expect(result.print).toBe(true);
+			expect(result.model).toBe("gpt-4o");
+			expect(result.messages).toEqual(["hello"]);
+		});
+	});
+
 	describe("--no-session flag", () => {
 		test("parses --no-session flag", () => {
 			const result = parseArgs(["--no-session"]);