Don't checkout things we don't need

.github/workflows/validate.yml

@@ -2,7 +2,7 @@ name: Validate Attack Data
 
 on:
   pull_request:
-    branches: [ master, main ]
+    branches: [master, main]
     types: [opened, synchronize, reopened]
     paths:
       - 'datasets/**/*.yml'
@@ -11,7 +11,7 @@ on:
       - 'bin/dataset_schema.json'
       - 'bin/requirements.txt'
   push:
-    branches: [ master, main ]
+    branches: [master, main]
     paths:
       - 'datasets/**/*.yml'
       - 'datasets/**/*.yaml'
@@ -27,97 +27,95 @@ permissions:
 jobs:
   validate-attack-data:
     runs-on: ubuntu-latest
-    
+
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v4
-      with:
-        lfs: true
-
-    - name: Set up Python
-      uses: actions/setup-python@v4
-      with:
-        python-version: '3.9'
-        cache: 'pip'
-
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install -r bin/requirements.txt
-
-    # Validate all YAML files
-    - name: Validate all YAML files
-      run: |
-        python bin/validate.py
-      env:
-        PYTHONPATH: ${{ github.workspace }}/bin
-
-    # PR-specific success/failure handling
-    - name: Comment PR on validation failure
-      if: failure() && github.event_name == 'pull_request'
-      uses: actions/github-script@v7
-      with:
-        script: |
-          const { owner, repo, number } = context.issue;
-
-          const body = `❌ **Attack Data Validation Failed**
-
-          The YAML files in this PR do not pass validation. Please check the workflow logs for detailed error messages and fix the issues before merging.
-
-          [View workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})`;
-
-          await github.rest.issues.createComment({
-            owner,
-            repo,
-            issue_number: number,
-            body: body
-          });
-
-    - name: Comment PR on validation success
-      if: success() && github.event_name == 'pull_request'
-      uses: actions/github-script@v7
-      with:
-        script: |
-          const { owner, repo, number } = context.issue;
-
-          const body = `✅ **Attack Data Validation Passed**
-
-          All YAML files in this PR have been successfully validated against the schema.
-
-          Ready for review and merge! 🚀`;
-
-          await github.rest.issues.createComment({
-            owner,
-            repo,
-            issue_number: number,
-            body: body
-          });
-
-    # Push-specific failure handling (create issue)
-    - name: Create issue on validation failure (Push)
-      if: failure() && github.event_name == 'push'
-      uses: actions/github-script@v7
-      with:
-        script: |
-          const title = `🚨 Attack Data Validation Failed - ${new Date().toISOString().split('T')[0]}`;
-          const body = `**Validation failed on push to ${context.ref}**
-
-          Commit: ${context.sha}
-
-          The YAML files in the datasets directory do not pass validation. This indicates that invalid data has been merged into the main branch.
-
-          **Action Required:**
-          1. Review the [failed workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
-          2. Fix the validation errors
-          3. Create a hotfix PR to resolve the issues
-          `;
-
-          await github.rest.issues.create({
-            owner: context.repo.owner,
-            repo: context.repo.repo,
-            title: title,
-            body: body,
-            labels: ['bug', 'validation-failure', 'high-priority']
-          });
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          lfs: false
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r bin/requirements.txt
+
+      # Validate all YAML files
+      - name: Validate all YAML files
+        run: |
+          python bin/validate.py
+        env:
+          PYTHONPATH: ${{ github.workspace }}/bin
+
+      # PR-specific success/failure handling
+      - name: Comment PR on validation failure
+        if: failure() && github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { owner, repo, number } = context.issue;
+
+            const body = `❌ **Attack Data Validation Failed**
+
+            The YAML files in this PR do not pass validation. Please check the workflow logs for detailed error messages and fix the issues before merging.
+
+            [View workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})`;
+
+            await github.rest.issues.createComment({
+              owner,
+              repo,
+              issue_number: number,
+              body: body
+            });
+
+      - name: Comment PR on validation success
+        if: success() && github.event_name == 'pull_request'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { owner, repo, number } = context.issue;
+
+            const body = `✅ **Attack Data Validation Passed**
+
+            All YAML files in this PR have been successfully validated against the schema.
+
+            Ready for review and merge! 🚀`;
+
+            await github.rest.issues.createComment({
+              owner,
+              repo,
+              issue_number: number,
+              body: body
+            });
+
+      # Push-specific failure handling (create issue)
+      - name: Create issue on validation failure (Push)
+        if: failure() && github.event_name == 'push'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const title = `🚨 Attack Data Validation Failed - ${new Date().toISOString().split('T')[0]}`;
+            const body = `**Validation failed on push to ${context.ref}**
+
+            Commit: ${context.sha}
+
+            The YAML files in the datasets directory do not pass validation. This indicates that invalid data has been merged into the main branch.
 
+            **Action Required:**
+            1. Review the [failed workflow run](${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }})
+            2. Fix the validation errors
+            3. Create a hotfix PR to resolve the issues
+            `;
 
+            await github.rest.issues.create({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              title: title,
+              body: body,
+              labels: ['bug', 'validation-failure', 'high-priority']
+            });