fix: print formatted CLI version to stderr (#569)

Co-authored-by: CharlieHelps <charlie@charlielabs.ai>

Author: charliecreates[bot]

.changeset/calm-lions-report.md

@@ -0,0 +1,5 @@
+---
+"hevy-mcp": patch
+---
+
+Print the CLI version with the package name to stderr.

src/index.test.ts

@@ -225,29 +225,44 @@ describe("Server entry", () => {
 	});
 
 	describe("runServer", () => {
-		it.each(["--version", "-v"])(
-			"prints version for %s and exits before server startup",
-			async (flag) => {
-				process.env = {
-					...originalEnv,
-					HEVY_API_KEY: "test-api-key",
-				};
+		it.each([
+			["--version", undefined],
+			["-v", ""],
+		])(
+			"prints version for %s without an API key and exits before server startup",
+			async (flag, apiKey) => {
+				process.env = { ...originalEnv };
+				if (apiKey === undefined) {
+					delete process.env.HEVY_API_KEY;
+				} else {
+					process.env.HEVY_API_KEY = apiKey;
+				}
 				process.argv = [...originalArgv.slice(0, 2), flag];
 
 				const logSpy = vi
 					.spyOn(console, "log")
 					.mockImplementation(() => undefined);
+				const errorSpy = vi
+					.spyOn(console, "error")
+					.mockImplementation(() => undefined);
+				const exitSpy = vi
+					.spyOn(process, "exit")
+					.mockImplementation(() => undefined as never);
 
 				await runServer();
 
-				expect(logSpy).toHaveBeenCalledWith("dev");
+				expect(errorSpy).toHaveBeenCalledExactlyOnceWith("hevy-mcp vdev");
+				expect(logSpy).not.toHaveBeenCalled();
+				expect(exitSpy).not.toHaveBeenCalled();
 				expect(createClient).not.toHaveBeenCalled();
 				expect(testDoubles.startActiveSpan).not.toHaveBeenCalled();
 
 				const anyStdioModule = stdioModule as { __transports?: unknown[] };
 				expect(anyStdioModule.__transports).toHaveLength(0);
 
 				logSpy.mockRestore();
+				errorSpy.mockRestore();
+				exitSpy.mockRestore();
 			},
 		);
 

src/index.ts

@@ -222,7 +222,7 @@ export async function runServer() {
 	const cliAction = getCliAction(args);
 
 	if (cliAction === "version") {
-		console.log(version);
+		console.error(`${name} v${version}`);
 		return;
 	}