fix: address valid AI code quality findings

install.sh

@@ -70,7 +70,7 @@ resolve_version() {
       ;;
     *)
       echo "Error: unexpected response from GitHub releases API." >&2
-      echo "Response (truncated): $(printf '%s' "$response" | head -c 200)" >&2
+      echo "Response (truncated): $(printf '%s' "$response" | cut -c1-200)" >&2
       exit 1
       ;;
   esac

tests/commands/plugin/index.test.ts

@@ -4,32 +4,31 @@ import { Command } from "@commander-js/extra-typings";
 
 import { registerPluginCommand } from "../../../src/commands/plugin/index";
 
+const createProgramAndPlugin = () => {
+  const program = new Command();
+  registerPluginCommand(program);
+  const plugin = program.commands.find((c) => c.name() === "plugin")!;
+  return { program, plugin };
+};
+
 describe("registerPluginCommand", () => {
   test("registers 'plugin' as a subcommand", () => {
-    const program = new Command();
-    registerPluginCommand(program);
-    const sub = program.commands.find((c) => c.name() === "plugin");
-    expect(sub).toBeDefined();
+    const { plugin } = createProgramAndPlugin();
+    expect(plugin).toBeDefined();
   });
 
   test("has a description", () => {
-    const program = new Command();
-    registerPluginCommand(program);
-    const sub = program.commands.find((c) => c.name() === "plugin")!;
-    expect(sub.description()).toBeTruthy();
+    const { plugin } = createProgramAndPlugin();
+    expect(plugin.description()).toBeTruthy();
   });
 
   test("registers 'url' subcommand", () => {
-    const program = new Command();
-    registerPluginCommand(program);
-    const plugin = program.commands.find((c) => c.name() === "plugin")!;
+    const { plugin } = createProgramAndPlugin();
     expect(plugin.commands.find((c) => c.name() === "url")).toBeDefined();
   });
 
   test("registers 'install' subcommand", () => {
-    const program = new Command();
-    registerPluginCommand(program);
-    const plugin = program.commands.find((c) => c.name() === "plugin")!;
+    const { plugin } = createProgramAndPlugin();
     expect(plugin.commands.find((c) => c.name() === "install")).toBeDefined();
   });
 });

tests/helpers/binary-upgrade.test.ts

@@ -29,9 +29,9 @@ describe("getArtifactInfo", () => {
   test("returns .tar.gz extension for non-win32", () => {
     const info = getArtifactInfo();
     if (process.platform === "win32") return;
-    if (info === null) return;
-    expect(info.ext).toBe(".tar.gz");
-    expect(info.binaryName).toBe("archgate");
+    expect(info).not.toBeNull();
+    expect(info!.ext).toBe(".tar.gz");
+    expect(info!.binaryName).toBe("archgate");
   });
 });