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

packages/skills/gantt/examples/query-timeline.ts

@@ -0,0 +1,69 @@
+/**
+ * Example: Query project timeline and display statistics
+ * 
+ * Usage:
+ *   npx tsx examples/query-timeline.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/query-timeline.ts <project-id>');
+    process.exit(1);
+  }
+
+  const client = createGanttClientFromEnv();
+  
+  console.log(`Fetching timeline for project ${projectId}...\n`);
+  
+  const timeline = await client.getProjectTimeline(projectId);
+  
+  console.log(`Project: ${timeline.project.name}`);
+  console.log(`Status: ${timeline.project.status}`);
+  
+  if (timeline.project.startDate && timeline.project.endDate) {
+    console.log(`Timeline: ${timeline.project.startDate} → ${timeline.project.endDate}`);
+  }
+  
+  console.log(`\nTasks (${timeline.stats.total} total):`);
+  console.log(`  ✓ Completed: ${timeline.stats.completed}`);
+  console.log(`  ⊙ In Progress: ${timeline.stats.inProgress}`);
+  console.log(`  □ Not Started: ${timeline.stats.notStarted}`);
+  console.log(`  ⏸ Paused: ${timeline.stats.paused}`);
+  console.log(`  ⚠ Target passed: ${timeline.stats.targetPassed}`);
+  
+  console.log('\nTask List:');
+  
+  const statusIcon = (status: string): string => {
+    switch (status) {
+      case 'COMPLETED': return '✓';
+      case 'IN_PROGRESS': return '⊙';
+      case 'PAUSED': return '⏸';
+      case 'ARCHIVED': return '📦';
+      default: return '□';
+    }
+  };
+  
+  const now = new Date();
+  
+  for (const task of timeline.tasks) {
+    const icon = statusIcon(task.status);
+    const dueInfo = task.dueDate
+      ? ` Due: ${task.dueDate}`
+      : '';
+    
+    const targetPassed = task.dueDate && new Date(task.dueDate) < now && task.status !== 'COMPLETED'
+      ? ' (target passed)'
+      : '';
+    
+    console.log(`${icon} ${task.title} [${task.status}]${dueInfo}${targetPassed}`);
+  }
+}
+
+main().catch(error => {
+  console.error('Error:', error.message);
+  process.exit(1);
+});