fix(update): re-seed framework on version drift, not just in-command updates (#642) (#646)

packages/mosaic/src/runtime/update-checker.reseed.spec.ts

@@ -8,6 +8,9 @@ import {
   readRosterAgentNames,
   runFrameworkReseed,
   refreshActiveFleetUnits,
+  readInstalledFrameworkVersion,
+  readBundledFrameworkVersion,
+  checkFrameworkDrift,
 } from './update-checker.js';
 import { existsSync, readFileSync } from 'node:fs';
 
@@ -123,3 +126,73 @@ describe('refreshActiveFleetUnits', () => {
     expect(existsSync(join(configHome, 'systemd', 'user', 'mosaic-agent@.service'))).toBe(false);
   });
 });
+
+/**
+ * #642: re-seed when the on-disk framework is older than the bundled one even
+ * if no package is reported outdated (CLI upgraded outside `mosaic update`).
+ */
+describe('framework drift detection', () => {
+  let home: string; // stand-in for ~/.config/mosaic
+  let fw: string; // stand-in for the bundled framework root
+
+  beforeEach(() => {
+    const root = mkdtempSync(join(tmpdir(), 'mosaic-drift-'));
+    home = join(root, 'mosaic');
+    fw = join(root, 'framework');
+    mkdirSync(home, { recursive: true });
+    mkdirSync(fw, { recursive: true });
+  });
+  afterEach(() => {
+    rmSync(join(home, '..'), { recursive: true, force: true });
+  });
+
+  const writeInstalled = (v: string) => writeFileSync(join(home, '.framework-version'), v);
+  const writeBundled = (v: string) =>
+    writeFileSync(join(fw, 'install.sh'), `#!/usr/bin/env bash\nFRAMEWORK_VERSION=${v}\n`);
+
+  describe('readInstalledFrameworkVersion', () => {
+    it('returns undefined when the version file is absent', () => {
+      expect(readInstalledFrameworkVersion(home)).toBeUndefined();
+    });
+    it('parses the integer (tolerating surrounding whitespace)', () => {
+      writeInstalled('  3\n');
+      expect(readInstalledFrameworkVersion(home)).toBe(3);
+    });
+    it('returns undefined for non-numeric content', () => {
+      writeInstalled('not-a-number\n');
+      expect(readInstalledFrameworkVersion(home)).toBeUndefined();
+    });
+  });
+
+  describe('readBundledFrameworkVersion', () => {
+    it('returns undefined when install.sh is absent', () => {
+      expect(readBundledFrameworkVersion(fw)).toBeUndefined();
+    });
+    it('parses FRAMEWORK_VERSION=<n> from install.sh', () => {
+      writeBundled('4');
+      expect(readBundledFrameworkVersion(fw)).toBe(4);
+    });
+  });
+
+  describe('checkFrameworkDrift', () => {
+    it('reports drift when on-disk is older than bundled', () => {
+      writeInstalled('3');
+      writeBundled('4');
+      expect(checkFrameworkDrift(home, fw)).toEqual({ drifted: true, installed: 3, bundled: 4 });
+    });
+    it('no drift when versions match', () => {
+      writeInstalled('4');
+      writeBundled('4');
+      expect(checkFrameworkDrift(home, fw)).toMatchObject({ drifted: false });
+    });
+    it('no drift when on-disk is newer than bundled', () => {
+      writeInstalled('5');
+      writeBundled('4');
+      expect(checkFrameworkDrift(home, fw)).toMatchObject({ drifted: false });
+    });
+    it('no drift (conservative) when a version cannot be read', () => {
+      writeBundled('4'); // installed version file missing
+      expect(checkFrameworkDrift(home, fw)).toMatchObject({ drifted: false, bundled: 4 });
+    });
+  });
+});