Agent skill
azure-cosmos-rust
Azure Cosmos DB SDK for Rust (NoSQL API). Use for document CRUD, queries, containers, and globally distributed data. Triggers: "cosmos db rust", "CosmosClient rust", "container", "document rust", "NoSQL rust", "partition key".
Install this agent skill to your Project
npx add-skill https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/azure-cosmos-rust
SKILL.md
Azure Cosmos DB SDK for Rust
Client library for Azure Cosmos DB NoSQL API — globally distributed, multi-model database.
Installation
cargo add azure_data_cosmos azure_identity
Environment Variables
COSMOS_ENDPOINT=https://<account>.documents.azure.com:443/
COSMOS_DATABASE=mydb
COSMOS_CONTAINER=mycontainer
Authentication
use azure_identity::DeveloperToolsCredential;
use azure_data_cosmos::CosmosClient;
let credential = DeveloperToolsCredential::new(None)?;
let client = CosmosClient::new(
"https://<account>.documents.azure.com:443/",
credential.clone(),
None,
)?;
Client Hierarchy
| Client | Purpose | Get From |
|---|---|---|
CosmosClient |
Account-level operations | Direct instantiation |
DatabaseClient |
Database operations | client.database_client() |
ContainerClient |
Container/item operations | database.container_client() |
Core Workflow
Get Database and Container Clients
let database = client.database_client("myDatabase");
let container = database.container_client("myContainer");
Create Item
use serde::{Serialize, Deserialize};
#[derive(Serialize, Deserialize)]
struct Item {
pub id: String,
pub partition_key: String,
pub value: String,
}
let item = Item {
id: "1".into(),
partition_key: "partition1".into(),
value: "hello".into(),
};
container.create_item("partition1", item, None).await?;
Read Item
let response = container.read_item("partition1", "1", None).await?;
let item: Item = response.into_model()?;
Replace Item
let mut item: Item = container.read_item("partition1", "1", None).await?.into_model()?;
item.value = "updated".into();
container.replace_item("partition1", "1", item, None).await?;
Patch Item
use azure_data_cosmos::models::PatchDocument;
let patch = PatchDocument::default()
.with_add("/newField", "newValue")?
.with_remove("/oldField")?;
container.patch_item("partition1", "1", patch, None).await?;
Delete Item
container.delete_item("partition1", "1", None).await?;
Key Auth (Optional)
Enable key-based authentication with feature flag:
cargo add azure_data_cosmos --features key_auth
Best Practices
- Always specify partition key — required for point reads and writes
- Use
into_model()?— to deserialize responses into your types - Derive
SerializeandDeserialize— for all document types - Use Entra ID auth — prefer
DeveloperToolsCredentialover key auth - Reuse client instances — clients are thread-safe and reusable
Reference Links
| Resource | Link |
|---|---|
| API Reference | https://docs.rs/azure_data_cosmos |
| Source Code | https://github.com/Azure/azure-sdk-for-rust/tree/main/sdk/cosmos/azure_data_cosmos |
| crates.io | https://crates.io/crates/azure_data_cosmos |
Recommended Agent Skills
Expand your agent's capabilities with these related and highly-rated skills.
perigon-backend
Perigon ASP.NET Core + EF Core + Aspire conventions
perigon-agent
Pointers for Copilot/agents to apply Perigon conventions
perigon-angular
Angular 21+ standalone/Material/signal conventions for Perigon WebApp
fastapi-mastery
Comprehensive FastAPI development skill covering REST API creation, routing, request/response handling, validation, authentication, database integration, middleware, and deployment. Use when working with FastAPI projects, building APIs, implementing CRUD operations, setting up authentication/authorization, integrating databases (SQL/NoSQL), adding middleware, handling WebSockets, or deploying FastAPI applications. Triggered by requests involving .py files with FastAPI code, API endpoint creation, Pydantic models, or FastAPI-specific features.
context7-efficient
Token-efficient library documentation fetcher using Context7 MCP with 86.8% token savings through intelligent shell pipeline filtering. Fetches code examples, API references, and best practices for JavaScript, Python, Go, Rust, and other libraries. Use when users ask about library documentation, need code examples, want API usage patterns, are learning a new framework, need syntax reference, or troubleshooting with library-specific information. Triggers include questions like "Show me React hooks", "How do I use Prisma", "What's the Next.js routing syntax", or any request for library/framework documentation.
browser-use
Browser automation using Playwright MCP. Navigate websites, fill forms, click elements, take screenshots, and extract data. Use when tasks require web browsing, form submission, web scraping, UI testing, or any browser interaction.
Didn't find tool you were looking for?