Addon-Vitest: Support Vitest canaries

code/core/src/cli/AddonVitestService.test.ts

@@ -168,6 +168,28 @@ describe('AddonVitestService', () => {
       expect(result.reasons).toBeUndefined();
     });
 
+    it('should return compatible when vitest prerelease >= 3.0.0', async () => {
+      vi.mocked(mockPackageManager.getInstalledVersion)
+        .mockResolvedValueOnce('3.0.0-beta.1') // vitest
+        .mockResolvedValueOnce(null); // msw
+
+      const result = await service.validatePackageVersions();
+
+      expect(result.compatible).toBe(true);
+      expect(result.reasons).toBeUndefined();
+    });
+
+    it('should return compatible when vitest canary is used', async () => {
+      vi.mocked(mockPackageManager.getInstalledVersion)
+        .mockResolvedValueOnce('0.0.0-833c515fa25cef20905a7f9affb156dfa6f151ab') // vitest
+        .mockResolvedValueOnce(null); // msw
+
+      const result = await service.validatePackageVersions();
+
+      expect(result.compatible).toBe(true);
+      expect(result.reasons).toBeUndefined();
+    });
+
     it('should return compatible when vitest >=4.0.0', async () => {
       vi.mocked(mockPackageManager.getInstalledVersion)
         .mockResolvedValueOnce('4.0.0') // vitest

code/core/src/cli/AddonVitestService.ts

@@ -243,8 +243,9 @@ export class AddonVitestService {
     // Check Vitest version (>=3.0.0 - stricter requirement from postinstall)
     const vitestVersionSpecifier = await this.packageManager.getInstalledVersion('vitest');
     const coercedVitestVersion = vitestVersionSpecifier ? coerce(vitestVersionSpecifier) : null;
+    const isCanary = coercedVitestVersion?.version.startsWith('0.0.0') ?? false;
 
-    if (coercedVitestVersion && !satisfies(coercedVitestVersion, '>=3.0.0')) {
+    if (coercedVitestVersion && !satisfies(coercedVitestVersion, '>=3.0.0') && !isCanary) {
       reasons.push(
         `The addon requires Vitest 3.0.0 or higher. You are currently using ${vitestVersionSpecifier}.`
       );