[V3 Backport] Show latest instance by default

.changeset/yummy-dolls-rescue.md

@@ -0,0 +1,5 @@
+---
+"wrangler": patch
+---
+
+Show latest instance by dafault on workflows describe command

packages/wrangler/src/__tests__/workflows.test.ts

@@ -97,11 +97,11 @@ describe("wrangler workflows", () => {
 				Manage Workflow instances [open-beta]
 
 				COMMANDS
-				  wrangler workflows instances list <name>            Instance related commands (list, describe, terminate, pause, resume) [open-beta]
-				  wrangler workflows instances describe <name> <id>   Describe a workflow instance - see its logs, retries and errors [open-beta]
-				  wrangler workflows instances terminate <name> <id>  Terminate a workflow instance [open-beta]
-				  wrangler workflows instances pause <name> <id>      Pause a workflow instance [open-beta]
-				  wrangler workflows instances resume <name> <id>     Resume a workflow instance [open-beta]
+				  wrangler workflows instances list <name>            Instance related commands (list, describe, terminate, pause, resume)
+				  wrangler workflows instances describe <name> [id]   Describe a workflow instance - see its logs, retries and errors
+				  wrangler workflows instances terminate <name> <id>  Terminate a workflow instance
+				  wrangler workflows instances pause <name> <id>      Pause a workflow instance
+				  wrangler workflows instances resume <name> <id>     Resume a workflow instance
 
 				GLOBAL FLAGS
 				  -c, --config   Path to Wrangler configuration file  [string]
@@ -272,6 +272,18 @@ describe("wrangler workflows", () => {
 					{ once: true }
 				)
 			);
+			http.get(
+				`*/accounts/:accountId/workflows/some-workflow/instances`,
+				async () => {
+					return HttpResponse.json({
+						success: true,
+						errors: [],
+						messages: [],
+						result: [mockResponse],
+					});
+				},
+				{ once: true }
+			);
 		};
 
 		it("should describe the bar instance given a name", async () => {
@@ -284,6 +296,20 @@ describe("wrangler workflows", () => {
 │ Start                 │ End                   │ Duration  │ State      │ Error          │
 ├───────────────────────┼───────────────────────┼───────────┼────────────┼────────────────┤
 │ 1/1/2021, 12:00:00 AM │ 1/1/2021, 12:00:00 AM │ 0 seconds │ ✅ Success │ string: string │
+└───────────────────────┴───────────────────────┴───────────┴────────────┴────────────────┘"
+			`);
+		});
+
+		it("should describe the latest instance if none is given", async () => {
+			writeWranglerConfig();
+			await mockDescribeInstances();
+
+			await runWrangler(`workflows instances describe some-workflow bar`);
+			expect(std.out).toMatchInlineSnapshot(`
+"┌───────────────────────┬───────────────────────┬───────────┬────────────┬────────────────┐
+│ Start                 │ End                   │ Duration  │ State      │ Error          │
+├───────────────────────┼───────────────────────┼───────────┼────────────┼────────────────┤
+│ 1/1/2021, 12:00:00 AM │ 1/1/2021, 12:00:00 AM │ 0 seconds │ ✅ Success │ string: string │
 └───────────────────────┴───────────────────────┴───────────┴────────────┴────────────────┘"
 			`);
 		});

packages/wrangler/src/workflows/commands/instances/describe.ts

@@ -43,7 +43,8 @@ export const workflowsInstancesDescribeCommand = createCommand({
 			describe:
 				"ID of the instance - instead of an UUID you can type 'latest' to get the latest instance and describe it",
 			type: "string",
-			demandOption: true,
+			demandOption: false,
+			default: "latest",
 		},
 		"step-output": {
 			describe: