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cosmosdb-datamodeling

Comprehensive guide

cosmosdb-datamodeling is an agent skill from the github/awesome-copilot collection that guides the design of Azure Cosmos DB NoSQL data models. It works through structured requirements gathering and then an aggregate-oriented design. The agent first captures the application's requirements, the access patterns, the volumetrics and the concurrency and workload characteristics, and records them in a cosmosdb_requirements.md file. It then designs the data model using the core philosophy and design patterns of Cosmos DB, saving the result to a cosmosdb_data_model.md file. The skill sets a firm limit on the questions it asks: one question at a time, or at most three related questions. It also includes a warning for massive-scale workloads, such as more than 10,000 writes per second or batch processing of millions of records in a short period. For those, the agent must ask about data binning and chunking, the minimum number of actual write operations, and how total data size affects physical partitions before it designs anything. The skill is useful for teams starting a Cosmos DB application who want the access patterns settled before the model is fixed, since changing a partition key later is costly. The requirements file should be agreed with the people who own the workload. The skill is installed with the skills CLI from the github/awesome-copilot repository. Its skills.sh page showed about 8.7K installs and passing results from three security audits at the time of the scan.