name: mongodb description: MongoDB schema design, aggregation pipelines, indexing strategies, and performance. allowed-tools: Read, Write, Edit, Bash, Glob, Grep

MongoDB Skill

Expert assistance for MongoDB database design and operations.

Capabilities

• Design document schemas
• Build aggregation pipelines
• Create optimal indexes
• Implement data modeling patterns
• Configure replication and sharding

Aggregation Pipeline

const results = await collection.aggregate([
  { $match: { status: 'active' } },
  { $group: { _id: '$category', total: { $sum: '$amount' } } },
  { $sort: { total: -1 } },
  { $limit: 10 },
]).toArray();

Indexing

// Compound index
await collection.createIndex({ userId: 1, createdAt: -1 });

// Text index
await collection.createIndex({ title: 'text', content: 'text' });

Target Processes

• mern-stack-development
• database-design
• backend-development