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[[{“value”:””Did I build it right?” — the question every developer asks before shipping an AI app to production. At scale, getting it wrong gets expensive fast: the wrong partition key, the wrong index, the wrong data model — that’s RUs burning in production.
Andrew Liu, Principal PM Manager for Azure Cosmos DB, shows how the Cosmos DB Agent Kit answers that question without waiting a week for a senior architect.
In this demo from Azure Cosmos DB Conf 2026, Andrew walks through a real multi-agent travel-planner app — a 5-day LA family trip assistant that remembers where you left off using short-term, long-term, and vector memory stored in Azure Cosmos DB. Then he runs a live, in-editor code review of the entire data layer.
You’ll see:
• The Azure Cosmos DB VS Code extension — query, browse, and inspect your account inline, no portal context-switch
• Multi-agent memory patterns on Azure Cosmos DB: declarative facts, procedural preferences, episodic trip data, and vectors
• Installing the Cosmos DB Agent Kit with one CLI command — project or global scope
• How agent skills package decades of Azure Cosmos DB expertise (data modeling, partitioning, indexing, RU economics) as specialized context for your AI assistant
• A live review that reads your actual code AND your Bicep IaC — correlating partition keys, index policies, and document shapes against your real data access patterns
• Concrete findings: missing composite indexes on ORDER BY queries, a wrong partition key on the memories container, and a prioritized fix list ranked by RU savings
• Why catching this BEFORE production is the difference between a $50/month app and a runaway bill at scale
Two takeaways:
1. New to Azure Cosmos DB? You don’t have to learn partitioning and data modeling alone — the Agent Kit gives you a senior architect on demand, in your editor.
2. Existing Azure Cosmos DB developer? Point it at your past projects and find performance and cost wins.
👤 Connect with Andrew Liu
📝 Andrew Liu is Principal PM Manager on the Azure Cosmos DB team at Microsoft, helping developers build novel experiences on Azure’s globally distributed database.
💼 https://www.linkedin.com/in/aliuy/
𝕏 https://x.com/aliuy8
🎤 https://developer.azurecosmosdb.com/conf/#speaker/andrew-liu
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Azure Cosmos DB Conf 2026 is a free virtual developer event focused on building modern, scalable applications with Azure Cosmos DB. Sessions feature Microsoft engineers, product teams, and members of the global developer community sharing real-world solutions and best practices.
Originally streamed on April 28, 2026 | 9:00 AM – 2:00 PM PT
🔗 Useful Links
• Explore all sessions on-demand — https://aka.ms/CosmosConf26Playlist
• Azure Cosmos DB Conference 2026 Post-Event Survey — https://aka.ms/CosmosConf2026Survey
• Visit the conference website — https://aka.ms/azurecosmosdbconf
• Subscribe to Azure Cosmos DB on YouTube — https://www.youtube.com/@AzureCosmosDB
• Follow Azure Cosmos DB on X — https://x.com/AzureCosmosDB
• Follow Azure Cosmos DB on LinkedIn — https://www.linkedin.com/company/azure-cosmos-db/
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