Added codeowners, pr template, validator

.github/CODEOWNERS

@@ -0,0 +1 @@
+* @furkando @NGabuaeva @EdiOanceaV2 @sinantalhakosar @rturtu @hikmet-demir @Matteoverzotti @robertbarbu27

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,10 @@
+# Pull Request
+
+## Summary
+_Explain what this PR does and why it is needed._
+
+**Linear ticket:** PRO-XXX
+
+## Author Checklist
+- [ ] PR tested locally
+- [ ] PR tested on preview

.github/workflows/pr-checklist-validator.yml

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+name: PR Checklist Validator
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize, reopened]
+
+jobs:
+  validate-checklist:
+    runs-on: ubuntu-latest
+    name: Validate PR Checklist
+
+    steps:
+      - name: Check PR Checklist
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prBody = context.payload.pull_request.body || '';
+
+            // Find all checkboxes in the PR body
+            const checkboxRegex = /- \[([ xX])\]/g;
+            const checkboxes = [...prBody.matchAll(checkboxRegex)];
+
+            if (checkboxes.length === 0) {
+              core.setFailed('❌ No checkboxes found in PR description. Please use the PR template.');
+              return;
+            }
+
+            // Count checked and unchecked boxes
+            const totalBoxes = checkboxes.length;
+            const checkedBoxes = checkboxes.filter(match => 
+              match[1].toLowerCase() === 'x'
+            ).length;
+            const uncheckedBoxes = totalBoxes - checkedBoxes;
+
+            // Check for Linear URL/ticket
+            const linearRegex = /\*\*Linear ticket:\*\*[ \t]*([^\n]+)/i;
+            const linearMatch = prBody.match(linearRegex);
+            let linearError = null;
+
+            if (!linearMatch) {
+              linearError = '❌ Linear ticket field not found in PR description';
+            } else {
+              const linearValue = linearMatch[1].trim();
+              // Check if it's still the placeholder or empty
+              if (!linearValue || linearValue === 'PRO-XXX' || linearValue === '') {
+                linearError = '❌ Linear ticket is not filled out (still showing placeholder "PRO-XXX")';
+              } else {
+                // Validate format: should be either a ticket ID (e.g., PRO-123) or a full Linear URL
+                const validLinearPattern = /^(?:https?:\/\/linear\.app\/[^\s]+|[A-Z]+-\d+)$/;
+                if (!validLinearPattern.test(linearValue)) {
+                  linearError = `❌ Linear ticket format is invalid: "${linearValue}" (expected format: PRO-123 or https://linear.app/...)`;
+                }
+              }
+            }
+
+            // Create a summary
+            core.summary
+              .addHeading('PR Checklist Validation Results')
+              .addRaw(`Total checkboxes: ${totalBoxes}`)
+              .addRaw(`\nChecked: ✅ ${checkedBoxes}`)
+              .addRaw(`\nUnchecked: ❌ ${uncheckedBoxes}`)
+              .addRaw(`\nLinear ticket: ${linearError ? '❌ Invalid' : '✅ Valid'}`)
+              .write();
+
+            // Log the results
+            console.log(`Total checkboxes: ${totalBoxes}`);
+            console.log(`Checked: ${checkedBoxes}`);
+            console.log(`Unchecked: ${uncheckedBoxes}`);
+            console.log(`Linear validation: ${linearError || 'Valid'}`);
+
+            // Collect all errors
+            const errors = [];
+
+            if (uncheckedBoxes > 0) {
+              errors.push(
+                `📊 Status: ${checkedBoxes}/${totalBoxes} items checked\n` +
+                `⚠️  Please check all ${uncheckedBoxes} remaining checkbox(es) in the PR description before merging.`
+              );
+            }
+
+            if (linearError) {
+              errors.push(`🔗 ${linearError}\n⚠️  Please add a valid Linear ticket (e.g., PRO-123 or full Linear URL).`);
+            }
+
+            // Fail if there are any errors
+            if (errors.length > 0) {
+              core.setFailed(
+                `❌ PR validation failed!\n\n` +
+                errors.join('\n\n') +
+                `\n\n💡 Tip: Review each section carefully and ensure all requirements are met.`
+              );
+            } else {
+              console.log('✅ All checklist items are complete!');
+              core.notice('✅ All checklist items are complete! PR is ready for review.');
+            }
+
+      - name: Comment on PR (if incomplete)
+        if: failure()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prBody = context.payload.pull_request.body || '';
+            const checkboxes = [...prBody.matchAll(/- \[([ xX])\]/g)];
+            const totalBoxes = checkboxes.length;
+            const checkedBoxes = checkboxes.filter(match => 
+              match[1].toLowerCase() === 'x'
+            ).length;
+            const uncheckedBoxes = totalBoxes - checkedBoxes;
+
+            // Check Linear ticket
+            const linearRegex = /\*\*Linear ticket:\*\*[ \t]*([^\n]+)/i;
+            const linearMatch = prBody.match(linearRegex);
+            let linearError = null;
+
+            if (!linearMatch) {
+              linearError = 'Linear ticket field not found';
+            } else {
+              const linearValue = linearMatch[1].trim();
+              if (!linearValue || linearValue === 'PRO-XXX' || linearValue === '') {
+                linearError = 'Linear ticket is still showing placeholder "PRO-XXX"';
+              } else {
+                const validLinearPattern = /^(?:https?:\/\/linear\.app\/[^\s]+|[A-Z]+-\d+)$/;
+                if (!validLinearPattern.test(linearValue)) {
+                  linearError = `Linear ticket format is invalid: "${linearValue}"`;
+                }
+              }
+            }
+
+            // Check if we already commented
+            const { data: comments } = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+            });
+
+            const botComment = comments.find(comment => 
+              comment.user && comment.user.type === 'Bot' && 
+              comment.body.includes('PR Checklist Validation')
+            );
+
+            const issues = [];
+            if (totalBoxes === 0) {
+              issues.push(`- ❌ **Checklist:** No checkboxes found. Please use the PR template.`);
+            } else if (uncheckedBoxes > 0) {
+              issues.push(`- ❌ **Checklist:** ${checkedBoxes}/${totalBoxes} items checked (${uncheckedBoxes} remaining)`);
+            }
+            if (linearError) {
+              issues.push(`- ❌ **Linear ticket:** ${linearError}`);
+            }
+
+            // Build steps dynamically with correct numbering
+            let stepNum = 1;
+            const steps = [`${stepNum++}. Review the PR description`];
+
+            if (totalBoxes === 0) {
+              steps.push(`${stepNum++}. Use the PR template to add the required checklist`);
+            } else if (uncheckedBoxes > 0) {
+              steps.push(`${stepNum++}. Check all applicable boxes (\`- [x]\`)`);
+              steps.push(`${stepNum++}. If an item doesn't apply, check it and add a note explaining why`);
+            }
+
+            if (linearError) {
+              steps.push(`${stepNum++}. Add a valid Linear ticket (format: \`PRO-123\` or \`https://linear.app/...\`)`);
+            }
+
+            steps.push(`${stepNum}. Push an update or edit the PR description to re-trigger this check`);
+
+            const commentBody = [
+              '## 📋 PR Checklist Validation Failed',
+              '',
+              '⚠️ This PR cannot be merged until the following issues are resolved:',
+              '',
+              ...issues,
+              '',
+              '### What to do:',
+              ...steps,
+              '',
+              '---',
+              '*This check ensures all PR requirements are met before merging. If you believe this check should not apply to your PR, please discuss with the team.*'
+            ].join('\n');
+
+            if (botComment) {
+              // Update existing comment
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: botComment.id,
+                body: commentBody
+              });
+            } else {
+              // Create new comment
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.payload.pull_request.number,
+                body: commentBody
+              });
+            }
+
+      - name: Comment on PR (if complete)
+        if: success()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const prBody = context.payload.pull_request.body || '';
+            const checkboxes = [...prBody.matchAll(/- \[([ xX])\]/g)];
+            const totalBoxes = checkboxes.length;
+            const checkedBoxes = checkboxes.filter(match => 
+              match[1].toLowerCase() === 'x'
+            ).length;
+
+            // Check if we already commented
+            const { data: comments } = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+            });
+
+            const botComment = comments.find(comment => 
+              comment.user && comment.user.type === 'Bot' && 
+              comment.body.includes('PR Checklist Validation')
+            );
+
+            const commentBody = [
+              '## ✅ PR Checklist Validation Passed',
+              '',
+              `**Status:** All ${totalBoxes} checklist items completed`,
+              '**Linear ticket:** Valid ✅',
+              '',
+              '🎉 This PR meets all requirements and is ready for review!',
+              '',
+              '---',
+              '*This validation ensures all PR requirements are met before merging.*'
+            ].join('\n');
+
+            if (botComment) {
+              // Update existing comment with success message
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: botComment.id,
+                body: commentBody
+              });
+            } else {
+              // Create new success comment
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.payload.pull_request.number,
+                body: commentBody
+              });
+            }