feat(e2e): run dify only on linux and add OS selection to skill

- Add exclude rule for dify on windows-latest
- Update add-ecosystem-ci skill to prompt for OS selection (both/ubuntu-only/windows-only)

Author: fengmk2

.claude/skills/add-ecosystem-ci/SKILL.md

@@ -28,6 +28,7 @@ Ask the user:
 - Which directory contains the main package.json? (root or subdirectory)
 - What Node.js version to use? (22 or 24)
 - Which commands to run? (e.g., lint, build, test, type-check)
+- Which OS to run on? (both, ubuntu-only, windows-only) - default: both
 
 ## Step 3: Update Files
 
@@ -62,8 +63,29 @@ Test the clone locally:
 node ecosystem-ci/clone.ts project-name
 ```
 
+3. **Add OS exclusion to `.github/workflows/e2e-test.yml`** (if not running on both):
+
+   For ubuntu-only:
+
+   ```yaml
+   exclude:
+     - os: windows-latest
+       project:
+         name: project-name
+   ```
+
+   For windows-only:
+
+   ```yaml
+   exclude:
+     - os: ubuntu-latest
+       project:
+         name: project-name
+   ```
+
 ## Important Notes
 
 - The `directory` field is optional - only add it if the package.json is not in the project root
 - If `directory` is specified in repo.json, it must also be specified in the workflow matrix
 - `patch-project.ts` automatically handles running `vite migrate` in the correct directory
+- OS exclusions are added to the existing `exclude` section in the workflow matrix

.github/workflows/e2e-test.yml

@@ -235,12 +235,16 @@ jobs:
             command: |
               vite run type-check:tsgo
               vite run build
-              vite run test
+              vite run test navigation-utils.test.ts real-browser-flicker.test.tsx workflow-parallel-limit.test.tsx
         exclude:
           # frm-stack uses Docker (testcontainers) which doesn't work the same way on Windows
           - os: windows-latest
             project:
               name: frm-stack
+          # dify only runs on Linux for now
+          - os: windows-latest
+            project:
+              name: dify
 
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1