refactor(agent): dedupe harness and command workflows

src/cli/update-cli.test.ts

@@ -35,46 +35,10 @@ vi.mock("../config/config.js", () => ({
   writeConfigFile: vi.fn(),
 }));
 
-vi.mock("../infra/update-check.js", () => {
-  const parseSemver = (
-    value: string | null,
-  ): { major: number; minor: number; patch: number } | null => {
-    if (!value) {
-      return null;
-    }
-    const m = /^(\d+)\.(\d+)\.(\d+)/.exec(value);
-    if (!m) {
-      return null;
-    }
-    const major = Number(m[1]);
-    const minor = Number(m[2]);
-    const patch = Number(m[3]);
-    if (!Number.isFinite(major) || !Number.isFinite(minor) || !Number.isFinite(patch)) {
-      return null;
-    }
-    return { major, minor, patch };
-  };
-
-  const compareSemverStrings = (a: string | null, b: string | null): number | null => {
-    const pa = parseSemver(a);
-    const pb = parseSemver(b);
-    if (!pa || !pb) {
-      return null;
-    }
-    if (pa.major !== pb.major) {
-      return pa.major < pb.major ? -1 : 1;
-    }
-    if (pa.minor !== pb.minor) {
-      return pa.minor < pb.minor ? -1 : 1;
-    }
-    if (pa.patch !== pb.patch) {
-      return pa.patch < pb.patch ? -1 : 1;
-    }
-    return 0;
-  };
-
+vi.mock("../infra/update-check.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../infra/update-check.js")>();
   return {
-    compareSemverStrings,
+    ...actual,
     checkUpdateStatus: vi.fn(),
     fetchNpmTagVersion: vi.fn(),
     resolveNpmChannelTag: vi.fn(),