feat(#26): implement mosaic-plugin-gantt skill

packages/skills/gantt/examples/critical-path.ts

@@ -0,0 +1,58 @@
+/**
+ * Example: Calculate and display critical path for a project
+ * 
+ * Usage:
+ *   npx tsx examples/critical-path.ts <project-id>
+ */
+
+import { createGanttClientFromEnv } from '../index.js';
+
+async function main(): Promise<void> {
+  const projectId = process.argv[2];
+  
+  if (!projectId) {
+    console.error('Usage: npx tsx examples/critical-path.ts <project-id>');
+    process.exit(1);
+  }
+
+  const client = createGanttClientFromEnv();
+  
+  console.log(`Calculating critical path for project ${projectId}...\n`);
+  
+  const criticalPath = await client.calculateCriticalPath(projectId);
+  
+  console.log(`Critical Path (${criticalPath.totalDuration} days):`);
+  console.log('='.repeat(50));
+  
+  for (const item of criticalPath.path) {
+    const statusIcon = item.task.status === 'COMPLETED' ? '✓' : 
+                      item.task.status === 'IN_PROGRESS' ? '⊙' : '□';
+    console.log(`${statusIcon} ${item.task.title}`);
+    console.log(`   Duration: ${item.duration} days`);
+    console.log(`   Cumulative: ${item.cumulativeDuration} days`);
+    console.log(`   Status: ${item.task.status}`);
+    
+    if (item.task.metadata.dependencies && item.task.metadata.dependencies.length > 0) {
+      console.log(`   Depends on: ${item.task.metadata.dependencies.length} task(s)`);
+    }
+    
+    console.log('');
+  }
+  
+  if (criticalPath.nonCriticalTasks.length > 0) {
+    console.log('\nNon-Critical Tasks (can be delayed):');
+    console.log('='.repeat(50));
+    
+    for (const item of criticalPath.nonCriticalTasks.sort((a, b) => a.slack - b.slack)) {
+      console.log(`- ${item.task.title}`);
+      console.log(`  Slack: ${item.slack} days`);
+      console.log(`  Status: ${item.task.status}`);
+      console.log('');
+    }
+  }
+}
+
+main().catch(error => {
+  console.error('Error:', error.message);
+  process.exit(1);
+});